bump version

Bumps [github.com/lmittmann/tint](https://github.com/lmittmann/tint) from 1.0.5 to 1.0.6.
- [Release notes](https://github.com/lmittmann/tint/releases)
- [Commits](https://github.com/lmittmann/tint/compare/v1.0.5...v1.0.6)

---
updated-dependencies:
- dependency-name: github.com/lmittmann/tint
  dependency-type: direct:production
  update-type: version-update:semver-patch
...

Signed-off-by: dependabot[bot] <support@github.com>

.github/ISSUE_TEMPLATE/bug_report.md

@@ -0,0 +1,31 @@
+---
+name: Bug report
+about: Create a report to help us improve
+title: "[bug-report]"
+labels: bug
+assignees: TLINDEN
+
+---
+
+**Description**
+<!-- Please provide a clear and concise description of the issue: -->
+
+
+**Steps To Reproduce**
+<!-- Please detail the steps to reproduce the behavior, execute kleingebaeck with the -d option: -->
+
+
+**Expected behavior**
+<!-- What do you expected to happen instead? -->
+
+
+**Version information**
+<!--
+Please provide as much version information as possible:
+- if you have just installed a binary, provide the output of: kleingebaeck --version
+- if you installed from source, provide the output of: make show-version
+- provide additional details: operating system and version and shell environment
+-->
+
+
+**Additional informations**

.github/ISSUE_TEMPLATE/bug_report_de.md

@@ -0,0 +1,32 @@
+---
+name: Bugreport Deutsch
+about: Erzeuge einen Bugreport
+title: "[bug-report-de]"
+labels: bug
+assignees: TLINDEN
+
+---
+
+**Beschreibung**
+<!-- Bitte beschreibe den Fehler klar und möglichst präzise: -->
+
+
+**Schritte um den Fehler zu reproduzieren**
+<!-- Bitte gib detailiert an, welche konkreten Schritte zum Fehler
+     geführt haben, führe kleingebaeck mit der Option -d option aus: -->
+
+
+**Erwartetes Verhalten**
+<!-- Welches Verhalten hast Du ursprünglich erwartet? -->
+
+
+**Versionsinformation**
+<!--
+Bitte gib uns so viel Versionsinfos wie möglich:
+- wenn Du nur das Programm installiert hast: kleingebaeck --version
+- wenn Du von Source installiert hast: make show-version
+- bitte gib zusätzliche Details an: Betriebssystem + Version, Shellumgebung etc.
+-->
+
+
+**Zusätzliche Informationen**

.github/ISSUE_TEMPLATE/feature_request.md

@@ -0,0 +1,23 @@
+---
+name: Feature request
+about: Suggest a feature
+title: "[feature-request]"
+labels: feature-request
+assignees: TLINDEN
+
+---
+
+**Description**
+<!-- Please provide a clear and concise description of the feature you desire: -->
+
+
+
+**Version information**
+<!--
+Just in case the feature is already present, please provide as
+much version information as possible:
+- if you have just installed a binary, provide the output of: tablizer --version
+- if you installed from source, provide the output of: make show-version
+- provide additional details: operating system and version and shell environment
+-->
+

.github/ISSUE_TEMPLATE/feature_request_de.md

@@ -0,0 +1,20 @@
+---
+name: Featurerequest Deutsch
+about: Empfehle ein neues Feature
+title: "[feature-request-de]"
+labels: feature-request
+assignees: TLINDEN
+
+---
+
+**Beschreibung**
+<!-- Bitte beschreibe das gewünschte Feature klar und möglichst präzise: -->
+
+
+**Versionsinformation**
+<!--
+Bitte gib uns so viel Versionsinfos wie möglich:
+- wenn Du nur das Programm installiert hast: kleingebaeck --version
+- wenn Du von Source installiert hast: make show-version
+- bitte gib zusätzliche Details an: Betriebssystem + Version, Shellumgebung etc.
+-->

.github/ISSUE_TEMPLATE/note_to_self.md

@@ -0,0 +1,8 @@
+---
+name: Note to self
+about: Internal bugs and wishes
+title: "[bug-report]"
+labels: bug
+assignees: TLINDEN
+
+---

.github/dependabot.yml

@@ -0,0 +1,10 @@
+version: 2
+updates:
+  - package-ecosystem: "gomod"
+    directory: "/"
+    schedule:
+      interval: "monthly"
+  - package-ecosystem: "github-actions"
+    directory: "/"
+    schedule:
+        interval: "monthly"

.github/workflows/ci.yaml

@@ -0,0 +1,47 @@
+name: build-and-test
+on: [push, pull_request]
+jobs:
+  build:
+    strategy:
+      matrix:
+        version: [1.21]
+        os: [ubuntu-latest, windows-latest, macos-latest]
+    name: Build
+    runs-on: ${{ matrix.os }}
+    steps:
+    - name: Set up Go
+      uses: actions/setup-go@v5
+      with:
+        go-version: ${{ matrix.version }}
+      id: go
+
+    - name: checkout
+      uses: actions/checkout@v4
+
+    - name: build
+      run: go build
+
+    - name: test
+      run: make test
+
+    - name: Update coverage report
+      uses: ncruces/go-coverage-report@main
+      with:
+        report: true
+        chart: true
+        amend: true
+      if: |
+        matrix.os == 'ubuntu-latest' &&
+        github.event_name == 'push'  
+      continue-on-error: true
+  
+  golangci:
+    name: lint
+    runs-on: ubuntu-latest
+    steps:
+      - uses: actions/setup-go@v5
+        with:
+          go-version: 1.21
+      - uses: actions/checkout@v4
+      - name: golangci-lint
+        uses: golangci/golangci-lint-action@v6

.github/workflows/pushimage.yaml

@@ -0,0 +1,34 @@
+name: build-push-image
+
+on:
+  push:
+    tags:
+      - 'v*'
+
+jobs:
+  build-and-push-image:
+    runs-on: ubuntu-latest
+    permissions:
+      packages: write
+    steps:
+      - name: Checkout repository
+        uses: actions/checkout@v3
+
+      - name: Log in to the Container registry
+        uses: docker/login-action@9780b0c442fbb1117ed29e0efdff1e18412f7567
+        with:
+          registry: https://ghcr.io
+          username: ${{ github.actor }}
+          password: ${{ secrets.GITHUB_TOKEN }}
+
+      - name: Build and push Docker image
+        uses: docker/build-push-action@48aba3b46d1b1fec4febb7c5d0c644b249a11355
+        with:
+          push: true
+          tags: ghcr.io/tlinden/kleingebaeck:${{ github.ref_name}}
+
+      - name: Build and push latest Docker image
+        uses: docker/build-push-action@48aba3b46d1b1fec4febb7c5d0c644b249a11355
+        with:
+          push: true
+          tags: ghcr.io/tlinden/kleingebaeck:latest

.gitignore

@@ -1,3 +1,8 @@
 test
 kleingebaeck
 releases
+t/out
+.bak
+t/httproot/out
+t/httproot/kleinanzeigen
+t/httproot/favicon.ico

CODE_OF_CONDUCT.md

@@ -0,0 +1,114 @@
+# No Code of Conduct
+
+*TL;DR:* This project  does **NOT** have a so called  Code of Conduct,
+nor will it ever have one.
+
+## The Rant
+
+The reasons are somewhat complicated and  I'll try my best to document
+them here.
+
+Ethical codes  or rules come  along like laws.  But how is  ethical or
+moral behavior defined? And who  defines which behavior is ethical and
+which is not? Certainly not me.
+
+Unless  you  live  in  a  dictatorship (and  more  than  half  of  the
+population on  planet earth  do as  of this  writing), laws  come into
+existence by democratic procedures. Laws  cover almost every aspect of
+live in  a society. Laws allow  and forbid behavior and  laws sanction
+infringements.
+
+A software project like  this one on the other hand  is not a society.
+There   are   not   enough   people  involved   to   form   democratic
+structures. And there will always be  a minority of users who have the
+right to commit or reject code. How could any maintainer of a software
+project dare to decree rules upon  others? Actually, am I, the current
+maintainer of this very project authorized to do so?
+
+I think the anser to this question clearly is NO.
+
+The  issue  is  being  complicated  by  the  fact,  that  open  source
+development these days  happens on a planetary scale.  And this planet
+houses hundreds if not  thousands of different cultures, philosophies,
+ideologies and worldviews.  The answer  to many ethical questions will
+in most cases be vague and nebulous.
+
+Ones joke will always be another ones insult.
+
+Then there  is the  problem of  language. I myself  am not  an english
+native, but I publish everyting using  the english language. I am able
+to communicate with  most people in the open  source community because
+of that.   But I am  certainly not  able to understand  everything and
+everyone. There  might be nuances to  a sentence I don't  sense, there
+might be  sarcastic connotations I  don't understand or  references to
+historical figures, events  or traditions I don't know  and never have
+heard of.
+
+Judging over other  peoples online behavior looks like  a titanic task
+to me. It is just not my job  to judge others, I am not legitimized or
+authorized to do so and I am not interested in this kind of business.
+
+Another huge  problem with ethical rules  is that you need  to outline
+and enforce sanctions  on those who violate the rules.  But since I am
+not an  elected authority  how would I  be able to  do this?   I don't
+know.  And  what happens if  someone complains about myself?   Shall I
+remove myself from my own project? Come on!
+
+Last but  not least there's  the law. So,  let's say someone  in india
+writes something  insulting to some  other developer in an  issue.  Of
+course  german law  does not  apply  to indian  people. Moreover,  the
+insult might actually not be an  insult in india.  In the end, nothing
+would   happen.   Under   normal   circumstances,  maintainers   would
+eventually delete the posting, ban  the user or remove push privileges
+etc.
+
+But then, is there a way for  the offending user to defend himself? Of
+course not, since neither indian or german law alone applies. I cannot
+go to  a german court  and sue the  guy and he  cannot do the  same in
+india. Or -  we possibly could but the judges  in both countries would
+just laugh and close the case.
+
+That  being said,  I  don't have  the  power nor  the  tools, nor  the
+authority to enforce serious sanctions  of any meaningful kind against
+others. Therefore I cannot outline any rules whatsoever.
+
+And let's not  even start talking about  these undemocratic "comitees"
+many projects are  forming to circumvent this  problem.  Some projects
+even  include  external entities  like  a  lawyer or  some  bureaucrat
+somewhere  just to  have the  ability  to complain  against a  comitee
+member. What a mess!
+
+
+
+## So, what are the ethical rules within this project then?
+
+Well, there are none.
+
+This project is  about code, not society. It doesn't  matter where you
+come from,  how you look,  how you think,  what you believe,  who your
+friends are, whay you  said or did sometime in the  past. I don't even
+care if you are a human being. You are an alien so bored that you need
+to submit code on github? Fine with me. You're a convicted criminal? I
+don't give a shit!
+
+**The only thing I am interested here is Code and only Code.**
+
+So if anyhing happens  here I don't like or I  am obliged by (german!)
+law to act on, I will decide on  a case to case basis what to do.  And
+unfortunately,  since this  is the  nature  of a  github project,  you
+cannot complain, object or protest. I am very sorry!
+
+If you will, let's at least  outline these:
+
+- Please - just please -  behave towards others as you'd expect others
+  to behave towards yourself.
+
+- Don't judge others for any reason.
+
+- Only judge the code.
+
+But these are not rules, only a  friendly appeal to you as a developer
+and user.
+
+
+Thanks a lot!

CONTRIBUTING.md

@@ -0,0 +1,93 @@
+## Project Goals
+
+The goal  of this  project is  to build  a small  tool which  helps in
+maintaining backups of the german  ad site kleinanzeigen.de. It should
+be  small,  fast and  easy  to  understand.
+
+There will be no GUI, no web interface, no public API of some sort, no
+builtin interpreter.
+
+The  programming  language  used  for  this  project  will  always  be
+[GOLANG](https://go.dev/)  with  the  exception of  the  documentation
+([Perl POD](https://perldoc.perl.org/perlpod)) and the Makefile.
+
+# Contributing
+
+You can contribute to this project in various ways:
+
+## Open an issue
+
+If you encounter  a problem or don't understand how  the program works
+or if you think the documentation is unclear, please don't hesitate to
+open an issue.
+
+Please add as much information about the case as possible, such as:
+
+- Your environment (operating system etc)
+- kleingebaeck version (`kleingebaeck --version`)
+- Commandline used. Please replace sensitive information with mock data!
+- Repeat the command with debugging enabled (`-d` flag)
+- Actual program output, Please replace sensitive information with mock data!
+- Expected program output.
+- Error message - if any.
+
+Be aware  that I am  working on this (and  some others) project  in my
+spare  time which  is scarce.   Therefore  please don't  expect me  to
+respond to  your query within  hours or even  days. Be patient,  but I
+WILL respond.
+
+## Pull Requests
+
+Code and documentation help is  always much appreciated! Please follow
+thes guidelines to successfully contribute:
+
+-  Every  pull   request  shall  be  based   on  latest  `development`
+  branch. `main` is only used for releases.
+  
+- Execute the  unit tests before committing: `make  test`. There shall
+  be no errors.
+  
+- Strive  to be  backwards compatible  so that  users who  are already
+  using the program  don't have to change their habits  - unless it is
+  really neccessary.
+
+- Try to add a unit test for your fix, addition or modification.
+
+- Don't ever change existing unit tests!
+
+- Add a meaningful and comprehensive rationale about your contribution:
+  - Why do you think it might be useful for others?
+  - What did you actually change or add?
+  - Is there an open issue which  this PR fixes and if so, please link
+    to that issue.
+
+- [Re-]format your code with `gofmt -s`.
+
+- Avoid unneccesary dependencies, especially for very small functions.
+
+- **If** a  new dependency is being added, it  must be compatible with
+  our [license agreement](LICENSE).
+  
+- You  need to accept  that the  code or documentation  you contribute
+  will be redistributed under the  terms of said license agreement. If
+  your  contribution  is  considerably  large  or  if  you  contribute
+  regularly, then  feel free  to add  your name (and  if you want your
+  email    address)     to    the    *AUTHORS*    section    of    the
+  [manpage](kleingebaeck.pod).
+
+- Adhere to the above mentioned project goals.
+
+- If   you are  unsure if  your addition or  change will  be accepted,
+  better ask before starting coding. Open an issue about your proposal
+  and let's  discuss it! That way  we avoid doing unnessesary  work on
+  both sides.
+    
+Each pull  request will be  carefully reviewed and  if it is  a useful
+addition  it  will  be  accepted. However,  please  be  prepared  that
+sometimes a  PR will be  rejected.  The reasons  may vary and  will be
+documented.   Perhaps the  above guidelines  are not  matched, or  the
+addition seems  to be not so  useful from my perspective,  maybe there
+are  too  much  changes  or  there  might  be  changes  I  don't  even
+understand.
+
+But whatever happens: your contribution is always welcome!

Dockerfile

@@ -0,0 +1,27 @@
+FROM golang:1.21-alpine as builder
+
+RUN apk update
+RUN apk upgrade
+RUN apk add --no-cache git make
+
+RUN git --version
+
+WORKDIR /work
+
+COPY go.mod .
+COPY . .
+RUN go mod download
+RUN make
+
+FROM alpine:latest
+LABEL maintainer="Thomas von Dein <git@daemon.de>"
+
+WORKDIR /app
+COPY --from=builder /work/kleingebaeck /app/kleingebaeck
+
+ENV KLEINGEBAECK_OUTDIR /backup
+ENV LANG C.UTF-8
+USER 1001:1001
+
+ENTRYPOINT ["/app/kleingebaeck"]
+CMD ["-h"]

Makefile

@@ -50,11 +50,21 @@ install: buildlocal
 	install -o $(UID) -g $(GID) -m 444 $(tool).1 $(PREFIX)/man/man1/
 
 clean:
-	rm -rf $(tool) coverage.out testdata
+	rm -rf $(tool) coverage.out testdata t/out
 
 test: clean
+	mkdir -p t/out
 	go test ./... $(ARGS)
 
+testlint: test lint
+
+lint:
+	golangci-lint run
+
+lint-full:
+	golangci-lint run --enable-all --exclude-use-default --disable exhaustivestruct,exhaustruct,depguard,interfacer,deadcode,golint,structcheck,scopelint,varcheck,ifshort,maligned,nosnakecase,godot,funlen,gofumpt,cyclop,noctx,gochecknoglobals,paralleltest
+	gocritic check -enableAll *.go
+
 testfuzzy: clean
 	go test -fuzz ./... $(ARGS)
 
@@ -77,7 +87,7 @@ release: buildall
 
 show-versions: buildlocal
 	@echo "### kleingebaeck version:"
-	@./kleingebaeck -v
+	@./kleingebaeck -V
 
 	@echo
 	@echo "### go module versions:"
@@ -87,5 +97,5 @@ show-versions: buildlocal
 	@echo "### go version used for building:"
 	@grep -m 1 go go.mod
 
-lint:
-	golangci-lint run -p bugs -p unused
+# lint:
+# 	golangci-lint run -p bugs -p unused

README-de.md

@@ -0,0 +1,346 @@
+## Kleingebäck - kleinanzeigen.de Backup
+
+![Kleingebaeck Logo](https://github.com/TLINDEN/kleingebaeck/blob/main/.github/assets/kleingebaecklogo-small.png)
+
+[![Go Report Card](https://goreportcard.com/badge/github.com/tlinden/kleingebaeck)](https://goreportcard.com/report/github.com/tlinden/kleingebaeck) 
+[![Actions](https://github.com/tlinden/kleingebaeck/actions/workflows/ci.yaml/badge.svg)](https://github.com/tlinden/kleingebaeck/actions)
+[![Go Coverage](https://github.com/tlinden/kleingebaeck/wiki/coverage.svg)](https://raw.githack.com/wiki/tlinden/kleingebaeck/coverage.html)
+![GitHub License](https://img.shields.io/github/license/tlinden/kleingebaeck)
+[![GitHub release](https://img.shields.io/github/v/release/tlinden/kleingebaeck?color=%2300a719)](https://github.com/TLINDEN/kleingebaeck/releases/latest)
+[![English](https://github.com/TLINDEN/kleingebaeck/blob/main/.github/assets/english.png)](https://github.com/tlinden/kleingebaeck/blob/main/README.md)
+
+Mit diesem Tool kann man seine Anzeigen bei https://kleinanzeigen.de sichern.
+
+Es kann alle Anzeigen eines Users (oder nur eine Ausgewählte)
+inklusive der Bilder herunterladen, die in einem Verzeichnis pro
+Anzeige gespeichert werden. In dem Verzeichnis wird eine Datei
+`Adlisting.txt` erstellt, in der sich die Inhalte der Anzeige wie
+Titel, Preis, Text etc befinden. Bilder werden natürlich auch heruntergeladen.
+
+## Screenshots
+
+Das ist die Hauptseite meines kleinanzeigen.de Accounts:
+
+![Index](https://github.com/TLINDEN/kleingebaeck/blob/main/.github/assets/kleinanzeigen-index.png)
+
+Sichern ich meine Anzeigen:
+
+![Download](https://github.com/TLINDEN/kleingebaeck/blob/main/.github/assets/kleinanzeigen-download.png)
+
+Backupverzeichnis nach dem Download:
+
+![Download](https://github.com/TLINDEN/kleingebaeck/blob/main/.github/assets/kleinanzeigen-backup.png)
+
+Verzeichnis einer Anzeige:
+
+![Download](https://github.com/TLINDEN/kleingebaeck/blob/main/.github/assets/kleinanzeigen-ad.png)
+
+**Das gleiche unter Windows:**
+
+Anzeigen Sichern:
+
+![Download](https://github.com/TLINDEN/kleingebaeck/blob/main/.github/assets/cmd-windows.jpg)
+
+Backupverzeichnis nach dem Download
+
+![Download](https://github.com/TLINDEN/kleingebaeck/blob/main/.github/assets/liste-windows.jpg)
+
+Und eine Anzeige:
+
+![Download](https://github.com/TLINDEN/kleingebaeck/blob/main/.github/assets/adlisting-windows.jpg)
+
+## Installation
+
+Das Tool hat keine weiteren Abhängigkeiten und erfordert auch keine
+Anmeldung oder ähnliches. Man kädt sich einfach die ausführbare Datei
+für seine Plattform herunter und kann direkt loslegen.
+
+### Installation des vorcompilierten Programms
+
+Auf der Seite [des letzten Releases](https://github.com/TLINDEN/kleingebaeck/releases/latest) findet man das Program für sein Betriebssystem und die Plattform (z.b. Windows + Intel)
+ 
+Es gibt 2 Varianten:
+
+1. Direkt das fertige Program für seine Plattform+OS herunterladen,
+   z.B. `kleingebaeck-linux-amd64-0.0.5`, nach `kleingebaeck`
+   umbenennen und in ein Verzeichnis kopieren, das im `PATH` ist,
+   (z.B. nach `$HOME/bin` oder als root nach `/usr/local/bin`).
+
+Um sicher zu gehen, dass an dem Program nicht verändert wurde, kann
+man die Signatur vergleichen. Für jeden Download gibt es eine dazu
+passende Signatur, in unserem Beispiel wäre das
+`kleingebaeck-linux-amd64-0.0.5.sha256`.
+
+Zum Verifizieren ausführen:
+
+```shell
+cat kleingebaeck-linux-amd64-0.0.5.sha25 && sha256sum kleingebaeck-linux-amd64-0.0.5
+```
+Man sollte zweimal den gleichen SHA256 Hash sehen.
+
+2. Man kann auch einen Tarball (tgz Dateiendung) herunterladen,
+   auspacken und mit GNU Make installieren:
+
+```shell
+tar xvfz kleingebaeck-linux-amd64-0.0.5.tar.gz
+cd kleingebaeck-linux-amd64-0.0.5
+sudo make install
+```
+
+### Installation aus dem Sourcecode
+
+Man muss eine funktionierende Go Buildumgebung in der Version 1.21
+installiert haben, um das Programm selber zu compilieren. GNU Make ist
+hilfreich, aber nicht unbedingt erforderlich.
+
+Um das Programm zu compilieren, muss man folgende Schritte ausführen:
+
+```shell
+git clone https://github.com/TLINDEN/kleingebaeck.git
+cd kleingebaeck
+go mod tidy
+make # (oder make)
+sudo make install
+```
+
+### Docker image benutzen
+
+Ein fertiges Dockerimage mit der aktuellen Programmversion ist immer
+verfügbar. Man kann damit z.B. das Tool testen, bevor man es dauerhaft
+benutzen möchte.
+
+Um das Image herunterzuladen:
+```
+docker pull ghcr.io/tlinden/kleingebaeck:latest
+```
+
+Um kleingebäck im Image auszuführen und Daten ins lokale Filesystem zu
+sichern, kann man so vorgehen:
+
+```shell
+mkdir anzeigen
+docker run -u `id -u $USER` -v ./anzeigen:/backup ghcr.io/tlinden/kleingebaeck:latest -u XXX -v
+ls -l anzeigen/ein-buch-mit-leeren-seiten
+total 792
+drwxr-xr-x 2 scip root   4096 Jan 23 12:58 ./
+drwxr-xr-x 3 scip scip   4096 Jan 23 12:58 ../
+-rw-r--r-- 1 scip root 131650 Jan 23 12:58 1.jpg
+-rw-r--r-- 1 scip root  81832 Jan 23 12:58 2.jpg
+-rw-r--r-- 1 scip root 134050 Jan 23 12:58 3.jpg
+-rw-r--r-- 1 scip root   1166 Jan 23 12:58 Adlisting.txt
+```
+
+Hier wird der aktuelle User auf den User im Image gemappt und das
+lokale Verzeichnis `anzeigen` nach `/backup` innerhalb des Images
+gemountet.
+
+Die Optionen `-u XXX -v` sind kleingebäck Optionen. Ersetze `XXX`
+durch Deine tatsächliche kleinanzeigen.de Userid.
+
+Eine Liste verfügbarer Images findet man [hier](https://github.com/tlinden/kleingebaeck/pkgs/container/kleingebaeck/versions?filters%5Bversion_type%5D=tagged)
+
+## Kommandozeilen Optionen:
+
+```
+Usage: kleingebaeck [-dvVhmoc] [<ad-listing-url>,...]
+Options:
+-u --user    <uid>      Backup ads from user with uid <uid>.
+-d --debug              Enable debug output.
+-v --verbose            Enable verbose output.
+-o --outdir  <dir>      Set output dir (default: current directory)
+-l --limit   <num>      Limit the ads to download to <num>, default: load all.
+-c --config  <file>     Use config file <file> (default: ~/.kleingebaeck).
+   --ignoreerrors       Ignore HTTP errors, may lead to incomplete ad backup.
+-m --manual             Show manual.
+-h --help               Show usage.
+-V --version            Show program version.
+
+If one  or more <ad-listing-url>'s  are specified, only  backup those,
+otherwise backup all ads of the given user.
+```
+
+## Konfiguration
+
+Man    kann    anstelle     von    Kommandlineoptionen    auch    eine
+Konfigurationsdatei  verwenden.  Sie  befindet  sich standardmäßig  in
+`~/.kleingebaeck`  aber man  kann  mit dem  Parameter  `-c` auch  eine
+andere Datei angeben.
+
+Das Format (TOML) ist einfach:
+
+```
+user = 1010101
+loglevel = verbose
+outdir = "test"
+```
+
+Im Source gibt es eine Beispieldatei `example.conf` mit Kommentaren.
+
+## Umgebungsvariablen
+
+Man kann darüber hinaus auch Umgebungsvariablen verwenden. Sie
+entsprechen den Konfigurationsoptionen, aber gross geschrieben mit dem
+Präfix `KLEINGEBAECK_`, z.B.
+
+```shell
+% KLEINGEBAECK_OUTDIR=/backup kleingebaeck -v
+```
+
+## Benutzung
+
+Um das Tool einsetzen zu können, muss man zunächst seine Userid bei
+kleinanzeigen.de herausfinden. Dazu ruft man am besten die Liste
+seiner Anzeigen auf, während man NICHT eingeloggt ist:
+
+https://www.kleinanzeigen.de/s-bestandsliste.html?userId=XXXXXX
+
+Der `XXXXX` Teil der URL ist die Userid.
+
+Trage diese Userid in der Konfigurationsdatei ein wie oben
+beschrieben. Gib ausserdem das Ausgabeverzeichnis an. Dann einfach nur
+`kleingebaeck` ausführen.
+
+Innerhalb des Ausgabeverzeichnisses wird sich dann pro Anzeige ein
+Unterverzeichnis befinden. Pro Anzeige gibt es eine Datei
+`Adlisting.txt`, die etwa so aussieht:
+
+```default
+Title: A book I sell
+Price: 99 € VB
+Id: 1919191919
+Category: Sachbücher
+Condition: Sehr Gut
+Created: 10.12.2023
+
+This is the description text.
+
+Pay with paypal.
+```
+
+Sowie alle Bilder.
+
+Das Format kann man mit der Variable `template` in der Konfiguration
+ändern. Die `example.conf` enthält ein Beispiel für das Standard Template.
+
+## Verhalten des Tools
+
+Es gibt einige Dinge über das Verhalten von kleingebäck, über die Du
+Bescheid wissen solltest:
+
+- alle HTML Seiten und Bilder werden immer heruntergeladen
+- es wird ein (konfigurierbarer) Useragent verwendet
+- HTTP Cookies werden beachtet
+- bei Fehlern wird dreimal mit unterschiedlichem Abstand erneut
+  versucht
+- Bilder Downloads laufen parallelisiert mit leicht unterschiedlichen
+  zeitlichen Abständen ab
+- Gleich aussehende Bilder werden nicht überschrieben
+
+Der letzte Punkt muss genauer erläutert werden:
+
+Wenn man bei Kleinanzeigen.de eine Anzeige einstellt und Bilder
+postet, werden diese dort in ihrer Grösse reduziert (durch Kompression
+und Verkleinerung der Bilder usw.). Diese reduzierten Bilder werden
+dann von kleingebäck heruntergeladen. Falls Du Deine original Bilder
+behalten hast, kannst Du diese danach in das Backupverzeichnis
+kopieren. Bei einem erneuten kleingebäck-Lauf werden diese Bilder dann
+nicht überschrieben.
+
+Wir verwenden dafür einen Algorythmus namens [distance
+hashing](https://github.com/corona10/goimagehash). Dieser Algorithmus
+prüft die Ähnlichkeit von Bildern. Diese können in ihrer Auflösung,
+Kompression, Farbtiefe und vielem mehr manipuliert worden sein und
+trotzdem als das "gleiche Bild" erkannt werden (wohlgemerkt nicht "das
+selbe": die Dateien sind durchaus unterschiedlich!). Bis zu einer
+Distance von 5 überschreiben wir keine Bilder, weil wir dann davon
+ausgehen, dass das lokal Vorhandene das Original ist.
+
+Bitte beachte aber, dass dies KEIN Cachingmechanismus ist: die Bilder
+werden trotzdem immer alle heruntergeladen. Das muss so sein, da wir
+uns nicht die Dateinamen anschauen können, da kleinanzeigen.de diese
+nämlich zu Zahlen umbenennt. Und die Dateinamen können sich auch
+ändern, wenn der User in der Anzeige die Bilder umarrangiert hat.
+
+Du kannst dieses Verhalten mit der Option **--force** ausschalten. Du
+kannst ausserdem mit der Option **--ignoreerrors** auch alle Fehler
+ignorieren, die beim Bilderdownload auftreten könnten.
+
+## Documentation
+
+Die Dokumentation kann man
+[online](https://github.com/TLINDEN/kleingebaeck/blob/main/kleingebaeck.pod)
+oder lokal lesen mit: `kleingebaeck --manual`. Hat man das Tool mit
+dem Tarball installiert, funktioniert auch `man kleingebaeck`.
+
+## Kleingebäck?
+
+Der Name kommt von "kleinanzeigen backup", verkürzt "klein back", das
+englisch ausgesprochene "back" (deutsch bäck) führt dann zu "Kleingebäck".
+
+## Wo bekommt man Hilfe
+
+Obwohl ich gerne von kleingebäck Benutzern in privaten Mails höre, ist
+das doch der beste Weg, die Anfrage zu übersehen und zu vergessen.
+
+Um einen Fehler, ein unerwartetes Verhalten, eine Feature Request oder
+einen Patch zu übermitteln, eröffne daher bitte einen Issue unter:
+https://github.com/TLINDEN/kleingebaeck/issues. Danke!
+
+Bitte gebe den fehlgeschlagenen Befehl an, rufe es auch mit Debugging
+`-d` auf.
+
+## Ähnliche Projekte
+
+Ich konnte kein Projekt finden, das speziell dafür geeignet ist,
+Anzeigen bei kleinanzeigen.de zu sichern.
+
+Aber es gibt ein Projekt, mit dem man ebenfalls Backups erstellen
+kann:  [kleinanzeigen-bot](https://github.com/Second-Hand-Friends/kleinanzeigen-bot/).
+Aber Vorsicht: kleinanzeigen.de bekämpft Bots aktiv, mit diesem hier
+gibt es regelmäßige Probleme, z.B.: 
+[issue](https://github.com/Second-Hand-Friends/kleinanzeigen-bot/issues/219).
+Das Hauptproblem ist, dass diese Art von Bot sich mit Deinem Account
+aktiv einloggt und mit der Seite interagiert. Damit kann die Firma die
+Aktivitäten recht einfach Deinem User zuordnen und diesen **sperren**!
+Also sei bitte vorsichtig!
+
+**Kleingebäck** erfordert keinen Login, es verwendet lediglich die
+öffentlich verfügbare Webseite und ruft diese auf, wie ein normaler
+Browser. Tatsächlich gibt es meiner Meinung nach keinen Unterschied zu
+einem Browserclient: beide laufen auf Anwenderseite auf Initiative
+eines Benutzers. Und mit welchen Browser ich eine Webseite aufrufe,
+bleibt immer noch mir überlassen und muss mir nicht von irgendwem
+vorgeschrieben werden. Das schliesst die Verwendung von Kleingebäck
+mit ein.
+
+Hinzu kommt, dass dieses Tool nicht dazu gedacht ist, rund um die Uhr
+zu laufen. Man ruft es ab und zu mal auf, wenn man halt neue Anzeigen
+eingestellt hat, vielleicht einmal die Woche oder so. Man weiss ja
+selber, wann man was geändert hat. Man benötigt trotzdem den Zugriff
+mit dem Browser oder der mobilen App um Kleinanzeigen.de verwalten zu
+können.
+
+Meiner Ansicht nach ist das Risiko also sehr minimal, es handelt sich
+meiner Meinung nach auch nicht um eine Verletzung der AGBs dort. Aber
+das ist nur meine persönliche Meinung, bitte beachtet das. Am Ende
+müsst Ihr selbst einschätzen und beurteilen wie hoch Ihr das Risiko
+seht und ob Ohr es eingehen möchtet. Für eventuell auftretende
+Konsequenzen bin ich nicht verantwortlich. Siehe auch [GPL Lizenz](LICENSE).
+
+Es       gibt      noch       ein      weiteres       Tool      namens
+[kleinanzeigen-enhanded](https://kleinanzeigen-enhanced.de/).  Das ist
+eine    kostenpflichtige     vollständige    Anzeigenverwaltung    für
+Profinutzer. Man  muss eine  monatliche Abogebühr bezahlen.   Das Tool
+ist  als  Browsererweiterung  für  Google  Chrome  implementiert,  was
+erklärt,  warum sie  Anzeigen  erstellen, ändern  und löschen  können,
+obwohl es  gar keine  öffentliche API gibt.   Sieht nach  einer netten
+ausgereiften Lösung aus. Mit Backups.
+ 
+## Copyright und License
+
+Lizensiert unter der GNU GENERAL PUBLIC LICENSE Version 3.
+
+## Autor
+
+T.v.Dein <tom AT vondein DOT org>
+

README.md

@@ -2,11 +2,14 @@
 
 ![Kleingebaeck Logo](https://github.com/TLINDEN/kleingebaeck/blob/main/.github/assets/kleingebaecklogo-small.png)
 
-[![License](https://img.shields.io/badge/license-GPL-blue.svg)](https://github.com/tlinden/kleingebaeck/blob/master/LICENSE)
 [![Go Report Card](https://goreportcard.com/badge/github.com/tlinden/kleingebaeck)](https://goreportcard.com/report/github.com/tlinden/kleingebaeck) 
+[![Actions](https://github.com/tlinden/kleingebaeck/actions/workflows/ci.yaml/badge.svg)](https://github.com/tlinden/kleingebaeck/actions)
+[![Go Coverage](https://github.com/tlinden/kleingebaeck/wiki/coverage.svg)](https://raw.githack.com/wiki/tlinden/kleingebaeck/coverage.html)
 ![GitHub License](https://img.shields.io/github/license/tlinden/kleingebaeck)
 [![GitHub release](https://img.shields.io/github/v/release/tlinden/kleingebaeck?color=%2300a719)](https://github.com/TLINDEN/kleingebaeck/releases/latest)
+[![German](https://github.com/TLINDEN/kleingebaeck/blob/main/.github/assets/german.png)](https://github.com/tlinden/kleingebaeck/blob/main/README-de.md)
 
+[Die deutsche Version des READMEs findet Ihr hier](README-de.md).
 
 This tool can be used to backup ads on the german ad page https://kleinanzeigen.de
 
@@ -15,6 +18,38 @@ directory, each ad into its own subdirectory. The backup will contain
 a textfile `Adlisting.txt` which contains the ad contents as the
 title, body, price etc. All images will be downloaded as well.
 
+## Screenshots
+
+This is the index of my kleinanzeigen.de Account:
+
+![Index](https://github.com/TLINDEN/kleingebaeck/blob/main/.github/assets/kleinanzeigen-index.png)
+
+Here I download my ads on the commandline:
+
+![Download](https://github.com/TLINDEN/kleingebaeck/blob/main/.github/assets/kleinanzeigen-download.png)
+
+And this is the backup directory after download:
+
+![Download](https://github.com/TLINDEN/kleingebaeck/blob/main/.github/assets/kleinanzeigen-backup.png)
+
+Here's a directory for one ad:
+
+![Download](https://github.com/TLINDEN/kleingebaeck/blob/main/.github/assets/kleinanzeigen-ad.png)
+
+**The same thing under windows:**
+
+Downloading ads:
+
+![Download](https://github.com/TLINDEN/kleingebaeck/blob/main/.github/assets/cmd-windows.jpg)
+
+Backup directory after download:
+
+![Download](https://github.com/TLINDEN/kleingebaeck/blob/main/.github/assets/liste-windows.jpg)
+
+And one ad listing directory:
+
+![Download](https://github.com/TLINDEN/kleingebaeck/blob/main/.github/assets/adlisting-windows.jpg)
+
 ## Installation
 
 The   tool  doesn't   need   authentication  and   doesn't  have   any
@@ -27,7 +62,7 @@ Go            to             the            [latest            release
 page](https://github.com/TLINDEN/kleingebaeck/releases/latest)     and
 look for your OS and platform. There are two options to install the binary:
 
-1.    Directly   download    the    binary    for   your    platoform,
+1.    Directly   download    the    binary    for   your    platform,
    e.g. `kleingebaeck-linux-amd64-0.0.5`, rename  it to `kleingebaeck`
    (or  whatever  you  like  more!)  and put  it  into  your  bin  dir
    (e.g. `$HOME/bin` or as root to `/usr/local/bin`).
@@ -61,19 +96,56 @@ installed - `make`.
 
 To install after building either copy the binary or execute `sudo make install`.
 
+### Using the docker image
+
+A pre-built docker  image is available, which you can  use to test the
+app without  installing it. To download:
+
+```shell
+docker pull ghcr.io/tlinden/kleingebaeck:latest
+```
+
+To execute kleingebaeck  inside the image and download ads  to a local
+directory, do something like this:
+
+```shell
+mkdir myads
+docker run -u `id -u $USER` -v ./myads:/backup ghcr.io/tlinden/kleingebaeck:latest -u XXX -v
+ls -l myads/ein-buch-mit-leeren-seiten
+total 792
+drwxr-xr-x 2 scip root   4096 Jan 23 12:58 ./
+drwxr-xr-x 3 scip scip   4096 Jan 23 12:58 ../
+-rw-r--r-- 1 scip root 131650 Jan 23 12:58 1.jpg
+-rw-r--r-- 1 scip root  81832 Jan 23 12:58 2.jpg
+-rw-r--r-- 1 scip root 134050 Jan 23 12:58 3.jpg
+-rw-r--r-- 1 scip root   1166 Jan 23 12:58 Adlisting.txt
+```
+
+We map the local user to the one inside the image so the permission
+will match. You'll need to create the directory first before executing
+docker run. And the local directory `myads` will be mapped to
+`/backup` inside the container.
+
+The options `-u XXX -v` are kleingebaeck options, replace `XXX` with
+your actual kleinanzeigen.de user id.
+
+A list of available images is  [here](https://github.com/tlinden/kleingebaeck/pkgs/container/kleingebaeck/versions?filters%5Bversion_type%5D=tagged)
+
 ## Commandline options:
 
 ```
 Usage: kleingebaeck [-dvVhmoc] [<ad-listing-url>,...]
 Options:
---user    -u <uid>      Backup ads from user with uid <uid>.
---debug   -d            Enable debug output.
---verbose -v            Enable verbose output.
---outdir  -o <dir>      Set output dir (default: current directory)
---limit   -l <num>      Limit the ads to download to <num>, default: load all.
---config  -c <file>     Use config file <file> (default: ~/.kleingebaeck).
---manual  -m            Show manual.
---help    -h            Show usage.
+-u --user    <uid>      Backup ads from user with uid <uid>.
+-d --debug              Enable debug output.
+-v --verbose            Enable verbose output.
+-o --outdir  <dir>      Set output dir (default: current directory)
+-l --limit   <num>      Limit the ads to download to <num>, default: load all.
+-c --config  <file>     Use config file <file> (default: ~/.kleingebaeck).
+   --ignoreerrors       Ignore HTTP errors, may lead to incomplete ad backup.
+-m --manual             Show manual.
+-h --help               Show usage.
+-V --version            Show program version.
 
 If one  or more <ad-listing-url>'s  are specified, only  backup those,
 otherwise backup all ads of the given user.
@@ -93,6 +165,13 @@ loglevel = verbose
 outdir = "test"
 ```
 
+## Environment Variables
+
+Kleingebaeck can also be configured using environment variables. Just prefix the config variables with `KLEINGEBAECK_` and put them to upper case. Eg:
+```shell
+% KLEINGEBAECK_OUTDIR=/backup kleingebaeck -v
+```
+
 ## Usage
 
 To setup the tool, you need to lookup your userid on
@@ -128,6 +207,52 @@ variable. The supplied sample config contains the default template.
 
 All images will be stored in the same directory.
 
+## Tool Behavior
+
+There are a bunch of things you might want to know about the behavior
+of the kleingebäck tool:
+
+- all HTML pages and IMAGEs are always being downloaded
+- we use a (customizable) user agent
+- we respect HTTP cookies
+- in the case of an error, the tool does 3 retries, the time it waits
+  between tries is longer for each retry
+- image download is parallized using small time differences to look
+  more natural
+- same images are not being overwritten on subsequent download
+
+
+The latter needs to be elaborated a bit more:
+
+If you publish an ad on kleinanzeigen.de and post images, those images
+will be reduced in size by the site (by compressing and down sizing
+them). This reduced images will be downloaded by kleingebäck. However,
+you may still own the original images and may want to put them into
+that backup directory so that you have all things for one ad together.
+
+You can easily do that, because kleingebäck won't overwrite those
+original images. It uses something called a distance hash using
+[goimagehash](https://github.com/corona10/goimagehash). This
+algorithmus checks the similarity of images. If an image has been
+resized it is still very similar to the original one. We accept a
+maximum of a distance of 5, everything above leads to overwrite.
+
+This works with resizes, cropped and otherwise manipulated images as
+long as the image still shows the original contents good enough.
+
+Also note, that this is NOT a caching mechanism: the images will be
+downloaded anyway during each run. We also can't look at the file
+names because kleinanzeigen.de renames all images to numbers. And
+those might even change if the user re-arranges the images.
+
+You can override this behavior using the **--force** option. Another
+option, **--ignoreerrors**, can be used to ignore all kinds of image
+errors. 
+
+## Documentation
+
+You can read the documentation [online](https://github.com/TLINDEN/kleingebaeck/blob/main/kleingebaeck.pod) or locally once you have installed kleingebaeck with: `kleingebaeck --manual`.
+
 ## Kleingebäck?
 
 The name is derived from "kleinanzeigen backup": "klein" (german for
@@ -147,7 +272,35 @@ https://github.com/TLINDEN/kleingebaeck/issues.
 Please repeat the failing command with debugging enabled `-d` and
 include the output in the issue.
 
-## Copyright und License
+## Related projects
+
+I could not find any projects specifically designed to backup
+kleinanzeigen.de ads, however there's a bot project which is also able
+to download ads:
+[kleinanzeigen-bot](https://github.com/Second-Hand-Friends/kleinanzeigen-bot/). However,
+be aware that kleinanzeigen.de is actively fighting bots! Look at this
+[issue](https://github.com/Second-Hand-Friends/kleinanzeigen-bot/issues/219). The
+problem with these kind of bots is, that they login into your account
+using your credentials. If the company is able to detect bot activity
+they can associate it easily with your account and **lock you
+out**. So be careful.
+
+**kleingebäck** doesn't need to login, it just accesses public
+available web pages. Kleinanzeigen.de could hardly do anything against
+it, once because it is legal. There's no difference between a browser
+and a commandline client. Both run on the clientside and it is not
+kleinanzeigen.de's decision which software one uses to access their
+pages. And second: because you can use it to download any ads, not
+just yours. So it is not really clear if the activity is associated in
+any way with the ad owner. In addition to that comes the fact that
+kleingebäck is just a backup tool. It is not intendet to be used on a
+daily basis. You cannot use it to view regular ads or maintain your
+own ads. You'll need to use the mobile app or the browser page with a
+login. So, in my point of view, the risk is very minimal.
+
+There is another Tool available named [kleinanzeigen-enhanced](https://kleinanzeigen-enhanced.de/). It is a complete Ad management system targeting primarily commercial users. You have to pay a monthly fee, perhaps there's also a free version available, but I haven't checked. The tool is implemented as a Chrome browser extension, which explains why it was possible to implement it without an API. It seems to be a nice solution for power users by the looks of it. And it includes backups.
+
+## Copyright and License
 
 Licensed under the GNU GENERAL PUBLIC LICENSE version 3.
 

SECURITY.md

@@ -0,0 +1,17 @@
+# Security Policy
+
+## Supported Versions
+
+Only  the latest  release  is supported.  If you  find  an issue  (any
+issue!), please check with the latest release first.
+
+## Reporting a Vulnerability
+
+I don't agree with the "responsible disclosure" process most projects
+(and companies) work these days.
+
+So, if you find a vulnerability of any kind, please just open an
+[issue](https://github.com/TLINDEN/kleingebaeck/issues). Please add
+all details required to reproduce the vulnerability. You won't be chased.
+
+That's just all about it.

ad.go

@@ -0,0 +1,82 @@
+/*
+Copyright © 2023-2024 Thomas von Dein
+
+This program is free software: you can redistribute it and/or modify
+it under the terms of the GNU General Public License as published by
+the Free Software Foundation, either version 3 of the License, or
+(at your option) any later version.
+
+This program is distributed in the hope that it will be useful,
+but WITHOUT ANY WARRANTY; without even the implied warranty of
+MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+GNU General Public License for more details.
+
+You should have received a copy of the GNU General Public License
+along with this program. If not, see <http://www.gnu.org/licenses/>.
+*/
+
+package main
+
+import (
+	"log/slog"
+	"strings"
+	"time"
+)
+
+type Index struct {
+	Links []string `goquery:".text-module-begin a,[href]"`
+}
+
+type Ad struct {
+	Title        string `goquery:"h1"`
+	Slug         string
+	ID           string
+	Condition    string `goquery:".addetailslist--detail--value,text"`
+	Category     string
+	CategoryTree []string `goquery:".breadcrump-link,text"`
+	Price        string   `goquery:"h2#viewad-price"`
+	Created      string   `goquery:"#viewad-extra-info,text"`
+	Text         string   `goquery:"p#viewad-description-text,html"`
+	Images       []string `goquery:".galleryimage-element img,[src]"`
+	Expire       string
+}
+
+// Used by slog to pretty print an ad
+func (ad *Ad) LogValue() slog.Value {
+	return slog.GroupValue(
+		slog.String("title", ad.Title),
+		slog.String("price", ad.Price),
+		slog.String("id", ad.ID),
+		slog.Int("imagecount", len(ad.Images)),
+		slog.Int("bodysize", len(ad.Text)),
+		slog.String("categorytree", strings.Join(ad.CategoryTree, "+")),
+		slog.String("condition", ad.Condition),
+		slog.String("created", ad.Created),
+		slog.String("expire", ad.Expire),
+	)
+}
+
+// check for  completeness.  I  erected these  fields to  be mandatory
+// (though I really don't know if  they really are). I consider images
+// and meta  optional. So,  if either  of the  checked fields  here is
+// empty we  return an  error.  All the  checked fields  are extracted
+// using goquery. However,  I think price is optional  since there are
+// ads for gifts as well.
+//
+// Note: we return true for "ad is incomplete" and false for "ad is complete"!
+func (ad *Ad) Incomplete() bool {
+	if ad.Category == "" || ad.Created == "" || ad.Text == "" {
+		return true
+	}
+
+	return false
+}
+
+func (ad *Ad) CalculateExpire() {
+	if ad.Created != "" {
+		ts, err := time.Parse("02.01.2006", ad.Created)
+		if err == nil {
+			ad.Expire = ts.AddDate(0, ExpireMonths, ExpireDays).Format("02.01.2006")
+		}
+	}
+}

config.go

@@ -1,5 +1,5 @@
 /*
-Copyright © 2023 Thomas von Dein
+Copyright © 2023-2024 Thomas von Dein
 
 This program is free software: you can redistribute it and/or modify
 it under the terms of the GNU General Public License as published by
@@ -17,14 +17,16 @@ along with this program. If not, see <http://www.gnu.org/licenses/>.
 package main
 
 import (
-	"errors"
 	"fmt"
+	"io"
 	"os"
 	"path/filepath"
 	"runtime"
+	"strings"
 
 	"github.com/knadh/koanf/parsers/toml"
 	"github.com/knadh/koanf/providers/confmap"
+	"github.com/knadh/koanf/providers/env"
 	"github.com/knadh/koanf/providers/file"
 	"github.com/knadh/koanf/providers/posflag"
 	"github.com/knadh/koanf/v2"
@@ -32,32 +34,57 @@ import (
 )
 
 const (
-	VERSION         string = "0.1.0"
+	VERSION    string = "0.3.12"
 	Baseuri    string = "https://www.kleinanzeigen.de"
 	Listuri    string = "/s-bestandsliste.html"
 	Defaultdir string = "."
-	DefaultTemplate string = "Title: {{.Title}}\nPrice: {{.Price}}\nId: {{.Id}}\n" +
-		"Category: {{.Category}}\nCondition: {{.Condition}}\nCreated: {{.Created}}\n\n{{.Text}}\n"
-	DefaultTemplateWin string = "Title: {{.Title}}\r\nPrice: {{.Price}}\r\nId: {{.Id}}\r\n" +
-		"Category: {{.Category}}\r\nCondition: {{.Condition}}\r\nCreated: {{.Created}}\r\n\r\n{{.Text}}\r\n"
-	Useragent string = "Mozilla/5.0 (Windows NT 10.0; Win64; x64) " +
+
+	DefaultTemplate string = "Title: {{.Title}}\nPrice: {{.Price}}\nId: {{.ID}}\n" +
+		"Category: {{.Category}}\nCondition: {{.Condition}}\n" +
+		"Created: {{.Created}}\nExpire: {{.Expire}}\n\n{{.Text}}\n"
+
+	DefaultTemplateWin string = "Title: {{.Title}}\r\nPrice: {{.Price}}\r\nId: {{.ID}}\r\n" +
+		"Category: {{.Category}}\r\nCondition: {{.Condition}}\r\n" +
+		"Created: {{.Created}}\r\nExpires: {{.Expire}}\r\n\r\n{{.Text}}\r\n"
+
+	DefaultUserAgent string = "Mozilla/5.0 (Windows NT 10.0; Win64; x64) " +
 		"AppleWebKit/537.36 (KHTML, like Gecko) Chrome/120.0.0.0 Safari/537.36"
+
+	DefaultAdNameTemplate string = "{{.Slug}}"
+
+	DefaultOutdirTemplate string = "."
+
+	// for image download throttling
+	MinThrottle int = 2
+	MaxThrottle int = 20
+
+	// we extract the slug from the uri
+	SlugURIPartNum int = 6
+
+	ExpireMonths int = 2
+	ExpireDays   int = 1
+
+	WIN string = "windows"
 )
 
+var DirsVisited map[string]int
+
 const Usage string = `This is kleingebaeck, the kleinanzeigen.de backup tool.
 
 Usage: kleingebaeck [-dvVhmoclu] [<ad-listing-url>,...]
 
 Options:
---user    -u <uid>      Backup ads from user with uid <uid>.
---debug   -d            Enable debug output.
---verbose -v            Enable verbose output.
---outdir  -o <dir>      Set output dir (default: current directory)
---limit   -l <num>      Limit the ads to download to <num>, default: load all.
---config  -c <file>     Use config file <file> (default: ~/.kleingebaeck).
---manual  -m            Show manual.
---help    -h            Show usage.
---version -V            Show program version.
+-u --user    <uid>      Backup ads from user with uid <uid>.
+-d --debug              Enable debug output.
+-v --verbose            Enable verbose output.
+-o --outdir  <dir>      Set output dir (default: current directory)
+-l --limit   <num>      Limit the ads to download to <num>, default: load all.
+-c --config  <file>     Use config file <file> (default: ~/.kleingebaeck).
+   --ignoreerrors       Ignore HTTP errors, may lead to incomplete ad backup.
+-f --force              Overwrite images and ads even if the already exist.
+-m --manual             Show manual.
+-h --help               Show usage.
+-V --version            Show program version.
 
 If one  or more ad listing url's  are specified, only  backup those,
 otherwise backup all ads of the given user.`
@@ -71,8 +98,12 @@ type Config struct {
 	User             int    `koanf:"user"`
 	Outdir           string `koanf:"outdir"`
 	Template         string `koanf:"template"`
+	Adnametemplate   string `koanf:"adnametemplate"`
 	Loglevel         string `koanf:"loglevel"`
 	Limit            int    `koanf:"limit"`
+	IgnoreErrors     bool   `koanf:"ignoreerrors"`
+	ForceDownload    bool   `koanf:"force"`
+	UserAgent        string `koanf:"useragent"` // conf only
 	Adlinks          []string
 	StatsCountAds    int
 	StatsCountImages int
@@ -87,48 +118,58 @@ func (c *Config) IncrImgs(num int) {
 }
 
 // load commandline flags and config file
-func InitConfig() (*Config, error) {
-	var k = koanf.New(".")
+func InitConfig(output io.Writer) (*Config, error) {
+	var kloader = koanf.New(".")
 
 	// determine template based on os
 	template := DefaultTemplate
-	if runtime.GOOS == "windows" {
+	if runtime.GOOS == WIN {
 		template = DefaultTemplateWin
 	}
 
 	// Load default values using the confmap provider.
-	k.Load(confmap.Provider(map[string]interface{}{
+	if err := kloader.Load(confmap.Provider(map[string]interface{}{
 		"template":       template,
-		"outdir":   ".",
+		"outdir":         DefaultOutdirTemplate,
 		"loglevel":       "notice",
 		"userid":         0,
-	}, "."), nil)
+		"adnametemplate": DefaultAdNameTemplate,
+		"useragent":      DefaultUserAgent,
+	}, "."), nil); err != nil {
+		return nil, fmt.Errorf("failed to load default values into koanf: %w", err)
+	}
 
 	// setup custom usage
-	f := flag.NewFlagSet("config", flag.ContinueOnError)
-	f.Usage = func() {
-		fmt.Println(Usage)
+	flagset := flag.NewFlagSet("config", flag.ContinueOnError)
+	flagset.Usage = func() {
+		fmt.Fprintln(output, Usage)
 		os.Exit(0)
 	}
 
 	// parse commandline flags
-	f.StringP("config", "c", "", "config file")
-	f.StringP("outdir", "o", "", "directory where to store ads")
-	f.IntP("user", "u", 0, "user id")
-	f.IntP("limit", "l", 0, "limit ads to be downloaded (default 0, unlimited)")
-	f.BoolP("verbose", "v", false, "be verbose")
-	f.BoolP("debug", "d", false, "enable debug log")
-	f.BoolP("version", "V", false, "show program version")
-	f.BoolP("help", "h", false, "show usage")
-	f.BoolP("manual", "m", false, "show manual")
+	flagset.StringP("config", "c", "", "config file")
+	flagset.StringP("outdir", "o", "", "directory where to store ads")
+	flagset.IntP("user", "u", 0, "user id")
+	flagset.IntP("limit", "l", 0, "limit ads to be downloaded (default 0, unlimited)")
+	flagset.BoolP("verbose", "v", false, "be verbose")
+	flagset.BoolP("debug", "d", false, "enable debug log")
+	flagset.BoolP("version", "V", false, "show program version")
+	flagset.BoolP("help", "h", false, "show usage")
+	flagset.BoolP("manual", "m", false, "show manual")
+	flagset.BoolP("force", "f", false, "force")
+	flagset.BoolP("ignoreerrors", "", false, "ignore image download HTTP errors")
 
-	f.Parse(os.Args[1:])
+	if err := flagset.Parse(os.Args[1:]); err != nil {
+		return nil, fmt.Errorf("failed to parse program arguments: %w", err)
+	}
 
 	// generate a  list of config files to try  to load, including the
 	// one provided via -c, if any
 	var configfiles []string
-	configfile, _ := f.GetString("config")
+
+	configfile, _ := flagset.GetString("config")
 	home, _ := os.UserHomeDir()
+
 	if configfile != "" {
 		configfiles = []string{configfile}
 	} else {
@@ -142,25 +183,41 @@ func InitConfig() (*Config, error) {
 
 	// Load the config file[s]
 	for _, cfgfile := range configfiles {
-		if path, err := os.Stat(cfgfile); !os.IsNotExist(err) {
-			if !path.IsDir() {
-				if err := k.Load(file.Provider(cfgfile), toml.Parser()); err != nil {
-					return nil, errors.New("error loading config file: " + err.Error())
-				}
-			}
-		}
-		// else: we ignore the file if it doesn't exists
+		path, err := os.Stat(cfgfile)
+
+		if err != nil {
+			// ignore non-existent files, but bail out on any other errors
+			if !os.IsNotExist(err) {
+				return nil, fmt.Errorf("failed to stat config file: %w", err)
 			}
 
-	// command line overrides config file
-	if err := k.Load(posflag.Provider(f, ".", k), nil); err != nil {
-		return nil, errors.New("error loading flags: " + err.Error())
+			continue
+		}
+
+		if !path.IsDir() {
+			if err := kloader.Load(file.Provider(cfgfile), toml.Parser()); err != nil {
+				return nil, fmt.Errorf("error loading config file: %w", err)
+			}
+		}
+	}
+
+	// env overrides config file
+	if err := kloader.Load(env.Provider("KLEINGEBAECK_", ".", func(s string) string {
+		return strings.ReplaceAll(strings.ToLower(
+			strings.TrimPrefix(s, "KLEINGEBAECK_")), "_", ".")
+	}), nil); err != nil {
+		return nil, fmt.Errorf("error loading environment: %w", err)
+	}
+
+	// command line overrides env
+	if err := kloader.Load(posflag.Provider(flagset, ".", kloader), nil); err != nil {
+		return nil, fmt.Errorf("error loading flags: %w", err)
 	}
 
 	// fetch values
 	conf := &Config{}
-	if err := k.Unmarshal("", &conf); err != nil {
-		return nil, errors.New("error unmarshalling: " + err.Error())
+	if err := kloader.Unmarshal("", &conf); err != nil {
+		return nil, fmt.Errorf("error unmarshalling: %w", err)
 	}
 
 	// adjust loglevel
@@ -172,7 +229,7 @@ func InitConfig() (*Config, error) {
 	}
 
 	// are there any args left on commandline? if so threat them as adlinks
-	conf.Adlinks = f.Args()
+	conf.Adlinks = flagset.Args()
 
 	return conf, nil
 }

docker-compose.yaml

@@ -0,0 +1,22 @@
+version: "3.9"
+services:
+  init:
+    image: alpine:latest
+    user: "root"
+    group_add:
+      - '${GROUP_ID}'
+    volumes:
+      - ${OUTDIR}:/backup
+    command: chown -R ${USER_ID}:${USER_ID} /backup
+
+  kleingebaeck:
+    container_name: kleingebaeck
+    user: "${USER_ID}:${USER_ID}"
+    volumes:
+      - ${OUTDIR}:/backup
+    working_dir: /backup
+    build: .
+    image: kleingebaeck:latest
+    depends_on:
+      init:
+        condition: service_completed_successfully

fetch.go

@@ -0,0 +1,104 @@
+/*
+Copyright © 2023-2024 Thomas von Dein
+
+This program is free software: you can redistribute it and/or modify
+it under the terms of the GNU General Public License as published by
+the Free Software Foundation, either version 3 of the License, or
+(at your option) any later version.
+
+This program is distributed in the hope that it will be useful,
+but WITHOUT ANY WARRANTY; without even the implied warranty of
+MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+GNU General Public License for more details.
+
+You should have received a copy of the GNU General Public License
+along with this program. If not, see <http://www.gnu.org/licenses/>.
+*/
+
+package main
+
+import (
+	"errors"
+	"fmt"
+	"io"
+	"log/slog"
+	"net/http"
+	"net/http/cookiejar"
+	"net/url"
+)
+
+// convenient wrapper to fetch some web content
+type Fetcher struct {
+	Config  *Config
+	Client  *http.Client
+	Cookies []*http.Cookie
+}
+
+func NewFetcher(conf *Config) (*Fetcher, error) {
+	jar, err := cookiejar.New(nil)
+	if err != nil {
+		return nil, fmt.Errorf("failed to create a cookie jar obj: %w", err)
+	}
+
+	return &Fetcher{
+			Client: &http.Client{
+				Transport: &loggingTransport{}, // implemented in http.go
+				Jar:       jar,
+			},
+			Config:  conf,
+			Cookies: []*http.Cookie{},
+		},
+		nil
+}
+
+func (f *Fetcher) Get(uri string) (io.ReadCloser, error) {
+	req, err := http.NewRequest(http.MethodGet, uri, http.NoBody)
+	if err != nil {
+		return nil, fmt.Errorf("failed to create a new HTTP request obj: %w", err)
+	}
+
+	req.Header.Set("User-Agent", f.Config.UserAgent)
+
+	if len(f.Cookies) > 0 {
+		uriobj, _ := url.Parse(Baseuri)
+
+		slog.Debug("have cookies, sending them",
+			"sample-cookie-name", f.Cookies[0].Name,
+			"sample-cookie-expire", f.Cookies[0].Expires,
+		)
+
+		f.Client.Jar.SetCookies(uriobj, f.Cookies)
+	}
+
+	res, err := f.Client.Do(req)
+	if err != nil {
+		return nil, fmt.Errorf("failed to initiate HTTP request to %s: %w", uri, err)
+	}
+
+	if res.StatusCode != http.StatusOK {
+		return nil, errors.New("could not get page via HTTP")
+	}
+
+	slog.Debug("got cookies?", "cookies", res.Cookies())
+	f.Cookies = res.Cookies()
+
+	return res.Body, nil
+}
+
+// fetch an image
+func (f *Fetcher) Getimage(uri string) (io.ReadCloser, error) {
+	slog.Debug("fetching ad image", "uri", uri)
+
+	body, err := f.Get(uri)
+	if err != nil {
+		if f.Config.IgnoreErrors {
+			slog.Info("Failed to download image, error ignored", "error", err.Error())
+
+			return nil, nil
+		}
+
+		return nil, err
+	}
+
+	return body, nil
+}

go.mod

@@ -4,27 +4,37 @@ go 1.21
 
 require (
 	astuart.co/goq v1.0.0
+	github.com/corona10/goimagehash v1.1.0
+	github.com/inconshreveable/mousetrap v1.1.0
+	github.com/jarcoal/httpmock v1.3.1
 	github.com/knadh/koanf/parsers/toml v0.1.0
 	github.com/knadh/koanf/providers/confmap v0.1.0
-	github.com/knadh/koanf/providers/file v0.1.0
+	github.com/knadh/koanf/providers/env v1.0.0
+	github.com/knadh/koanf/providers/file v1.1.2
 	github.com/knadh/koanf/providers/posflag v0.1.0
-	github.com/knadh/koanf/v2 v2.0.1
-	github.com/lmittmann/tint v1.0.3
+	github.com/knadh/koanf/v2 v2.1.2
+	github.com/lmittmann/tint v1.0.6
 	github.com/mattn/go-isatty v0.0.20
 	github.com/spf13/pflag v1.0.5
+	github.com/tlinden/yadu v0.1.3
+	golang.org/x/image v0.23.0
+	golang.org/x/sync v0.10.0
 )
 
 require (
-	github.com/PuerkitoBio/goquery v1.5.0 // indirect
-	github.com/andybalholm/cascadia v1.0.0 // indirect
-	github.com/fsnotify/fsnotify v1.6.0 // indirect
+	github.com/PuerkitoBio/goquery v1.5.1 // indirect
+	github.com/andybalholm/cascadia v1.1.0 // indirect
+	github.com/fatih/color v1.16.0 // indirect
+	github.com/fsnotify/fsnotify v1.7.0 // indirect
+	github.com/go-viper/mapstructure/v2 v2.2.1 // indirect
 	github.com/knadh/koanf/maps v0.1.1 // indirect
+	github.com/mattn/go-colorable v0.1.13 // indirect
 	github.com/mitchellh/copystructure v1.2.0 // indirect
-	github.com/mitchellh/mapstructure v1.5.0 // indirect
 	github.com/mitchellh/reflectwalk v1.0.2 // indirect
+	github.com/nfnt/resize v0.0.0-20180221191011-83c6a9932646 // indirect
 	github.com/pelletier/go-toml v1.9.5 // indirect
-	golang.org/x/net v0.0.0-20190606173856-1492cefac77f // indirect
-	golang.org/x/sync v0.5.0 // indirect
-	golang.org/x/sys v0.6.0 // indirect
+	golang.org/x/net v0.23.0 // indirect
+	golang.org/x/sys v0.21.0 // indirect
+	gopkg.in/yaml.v3 v3.0.1 // indirect
 
 )

go.sum

@@ -1,36 +1,59 @@
 astuart.co/goq v1.0.0 h1:nnYIhu/Z/j0VaX9Dp+pmh2Uh7ldEz6XfgSg+bAY5Yrw=
 astuart.co/goq v1.0.0/go.mod h1:+fokcnFrO8Pw2fj8drdStJvzoMFebJH69rw8IC21rno=
-github.com/PuerkitoBio/goquery v1.5.0 h1:uGvmFXOA73IKluu/F84Xd1tt/z07GYm8X49XKHP7EJk=
 github.com/PuerkitoBio/goquery v1.5.0/go.mod h1:qD2PgZ9lccMbQlc7eEOjaeRlFQON7xY8kdmcsrnKqMg=
-github.com/andybalholm/cascadia v1.0.0 h1:hOCXnnZ5A+3eVDX8pvgl4kofXv2ELss0bKcqRySc45o=
+github.com/PuerkitoBio/goquery v1.5.1 h1:PSPBGne8NIUWw+/7vFBV+kG2J/5MOjbzc7154OaKCSE=
+github.com/PuerkitoBio/goquery v1.5.1/go.mod h1:GsLWisAFVj4WgDibEWF4pvYnkVQBpKBKeU+7zCJoLcc=
 github.com/andybalholm/cascadia v1.0.0/go.mod h1:GsXiBklL0woXo1j/WYWtSYYC4ouU9PqHO0sqidkEA4Y=
+github.com/andybalholm/cascadia v1.1.0 h1:BuuO6sSfQNFRu1LppgbD25Hr2vLYW25JvxHs5zzsLTo=
+github.com/andybalholm/cascadia v1.1.0/go.mod h1:GsXiBklL0woXo1j/WYWtSYYC4ouU9PqHO0sqidkEA4Y=
+github.com/corona10/goimagehash v1.1.0 h1:teNMX/1e+Wn/AYSbLHX8mj+mF9r60R1kBeqE9MkoYwI=
+github.com/corona10/goimagehash v1.1.0/go.mod h1:VkvE0mLn84L4aF8vCb6mafVajEb6QYMHl2ZJLn0mOGI=
 github.com/davecgh/go-spew v1.1.0/go.mod h1:J7Y8YcW2NihsgmVo/mv3lAwl/skON4iLHjSsI+c5H38=
 github.com/davecgh/go-spew v1.1.1 h1:vj9j/u1bqnvCEfJOwUhtlOARqs3+rkHYY13jYWTU97c=
 github.com/davecgh/go-spew v1.1.1/go.mod h1:J7Y8YcW2NihsgmVo/mv3lAwl/skON4iLHjSsI+c5H38=
-github.com/fsnotify/fsnotify v1.6.0 h1:n+5WquG0fcWoWp6xPWfHdbskMCQaFnG6PfBrh1Ky4HY=
-github.com/fsnotify/fsnotify v1.6.0/go.mod h1:sl3t1tCWJFWoRz9R8WJCbQihKKwmorjAbSClcnxKAGw=
+github.com/fatih/color v1.16.0 h1:zmkK9Ngbjj+K0yRhTVONQh1p/HknKYSlNT+vZCzyokM=
+github.com/fatih/color v1.16.0/go.mod h1:fL2Sau1YI5c0pdGEVCbKQbLXB6edEj1ZgiY4NijnWvE=
+github.com/fsnotify/fsnotify v1.7.0 h1:8JEhPFa5W2WU7YfeZzPNqzMP6Lwt7L2715Ggo0nosvA=
+github.com/fsnotify/fsnotify v1.7.0/go.mod h1:40Bi/Hjc2AVfZrqy+aj+yEI+/bRxZnMJyTJwOpGvigM=
+github.com/go-viper/mapstructure/v2 v2.2.1 h1:ZAaOCxANMuZx5RCeg0mBdEZk7DZasvvZIxtHqx8aGss=
+github.com/go-viper/mapstructure/v2 v2.2.1/go.mod h1:oJDH3BJKyqBA2TXFhDsKDGDTlndYOZ6rGS0BRZIxGhM=
+github.com/inconshreveable/mousetrap v1.1.0 h1:wN+x4NVGpMsO7ErUn/mUI3vEoE6Jt13X2s0bqwp9tc8=
+github.com/inconshreveable/mousetrap v1.1.0/go.mod h1:vpF70FUmC8bwa3OWnCshd2FqLfsEA9PFc4w1p2J65bw=
+github.com/jarcoal/httpmock v1.3.1 h1:iUx3whfZWVf3jT01hQTO/Eo5sAYtB2/rqaUuOtpInww=
+github.com/jarcoal/httpmock v1.3.1/go.mod h1:3yb8rc4BI7TCBhFY8ng0gjuLKJNquuDNiPaZjnENuYg=
 github.com/knadh/koanf/maps v0.1.1 h1:G5TjmUh2D7G2YWf5SQQqSiHRJEjaicvU0KpypqB3NIs=
 github.com/knadh/koanf/maps v0.1.1/go.mod h1:npD/QZY3V6ghQDdcQzl1W4ICNVTkohC8E73eI2xW4yI=
 github.com/knadh/koanf/parsers/toml v0.1.0 h1:S2hLqS4TgWZYj4/7mI5m1CQQcWurxUz6ODgOub/6LCI=
 github.com/knadh/koanf/parsers/toml v0.1.0/go.mod h1:yUprhq6eo3GbyVXFFMdbfZSo928ksS+uo0FFqNMnO18=
 github.com/knadh/koanf/providers/confmap v0.1.0 h1:gOkxhHkemwG4LezxxN8DMOFopOPghxRVp7JbIvdvqzU=
 github.com/knadh/koanf/providers/confmap v0.1.0/go.mod h1:2uLhxQzJnyHKfxG927awZC7+fyHFdQkd697K4MdLnIU=
-github.com/knadh/koanf/providers/file v0.1.0 h1:fs6U7nrV58d3CFAFh8VTde8TM262ObYf3ODrc//Lp+c=
-github.com/knadh/koanf/providers/file v0.1.0/go.mod h1:rjJ/nHQl64iYCtAW2QQnF0eSmDEX/YZ/eNFj5yR6BvA=
+github.com/knadh/koanf/providers/env v1.0.0 h1:ufePaI9BnWH+ajuxGGiJ8pdTG0uLEUWC7/HDDPGLah0=
+github.com/knadh/koanf/providers/env v1.0.0/go.mod h1:mzFyRZueYhb37oPmC1HAv/oGEEuyvJDA98r3XAa8Gak=
+github.com/knadh/koanf/providers/file v1.1.2 h1:aCC36YGOgV5lTtAFz2qkgtWdeQsgfxUkxDOe+2nQY3w=
+github.com/knadh/koanf/providers/file v1.1.2/go.mod h1:/faSBcv2mxPVjFrXck95qeoyoZ5myJ6uxN8OOVNJJCI=
 github.com/knadh/koanf/providers/posflag v0.1.0 h1:mKJlLrKPcAP7Ootf4pBZWJ6J+4wHYujwipe7Ie3qW6U=
 github.com/knadh/koanf/providers/posflag v0.1.0/go.mod h1:SYg03v/t8ISBNrMBRMlojH8OsKowbkXV7giIbBVgbz0=
-github.com/knadh/koanf/v2 v2.0.1 h1:1dYGITt1I23x8cfx8ZnldtezdyaZtfAuRtIFOiRzK7g=
-github.com/knadh/koanf/v2 v2.0.1/go.mod h1:ZeiIlIDXTE7w1lMT6UVcNiRAS2/rCeLn/GdLNvY1Dus=
-github.com/lmittmann/tint v1.0.3 h1:W5PHeA2D8bBJVvabNfQD/XW9HPLZK1XoPZH0cq8NouQ=
-github.com/lmittmann/tint v1.0.3/go.mod h1:HIS3gSy7qNwGCj+5oRjAutErFBl4BzdQP6cJZ0NfMwE=
+github.com/knadh/koanf/v2 v2.1.2 h1:I2rtLRqXRy1p01m/utEtpZSSA6dcJbgGVuE27kW2PzQ=
+github.com/knadh/koanf/v2 v2.1.2/go.mod h1:Gphfaen0q1Fc1HTgJgSTC4oRX9R2R5ErYMZJy8fLJBo=
+github.com/kr/pretty v0.2.1 h1:Fmg33tUaq4/8ym9TJN1x7sLJnHVwhP33CNkpYV/7rwI=
+github.com/kr/pretty v0.2.1/go.mod h1:ipq/a2n7PKx3OHsz4KJII5eveXtPO4qwEXGdVfWzfnI=
+github.com/kr/text v0.2.0 h1:5Nx0Ya0ZqY2ygV366QzturHI13Jq95ApcVaJBhpS+AY=
+github.com/kr/text v0.2.0/go.mod h1:eLer722TekiGuMkidMxC/pM04lWEeraHUUmBw8l2grE=
+github.com/lmittmann/tint v1.0.6 h1:vkkuDAZXc0EFGNzYjWcV0h7eEX+uujH48f/ifSkJWgc=
+github.com/lmittmann/tint v1.0.6/go.mod h1:HIS3gSy7qNwGCj+5oRjAutErFBl4BzdQP6cJZ0NfMwE=
+github.com/mattn/go-colorable v0.1.13 h1:fFA4WZxdEF4tXPZVKMLwD8oUnCTTo08duU7wxecdEvA=
+github.com/mattn/go-colorable v0.1.13/go.mod h1:7S9/ev0klgBDR4GtXTXX8a3vIGJpMovkB8vQcUbaXHg=
+github.com/mattn/go-isatty v0.0.16/go.mod h1:kYGgaQfpe5nmfYZH+SKPsOc2e4SrIfOl2e/yFXSvRLM=
 github.com/mattn/go-isatty v0.0.20 h1:xfD0iDuEKnDkl03q4limB+vH+GxLEtL/jb4xVJSWWEY=
 github.com/mattn/go-isatty v0.0.20/go.mod h1:W+V8PltTTMOvKvAeJH7IuucS94S2C6jfK/D7dTCTo3Y=
+github.com/maxatome/go-testdeep v1.12.0 h1:Ql7Go8Tg0C1D/uMMX59LAoYK7LffeJQ6X2T04nTH68g=
+github.com/maxatome/go-testdeep v1.12.0/go.mod h1:lPZc/HAcJMP92l7yI6TRz1aZN5URwUBUAfUNvrclaNM=
 github.com/mitchellh/copystructure v1.2.0 h1:vpKXTN4ewci03Vljg/q9QvCGUDttBOGBIa15WveJJGw=
 github.com/mitchellh/copystructure v1.2.0/go.mod h1:qLl+cE2AmVv+CoeAwDPye/v+N2HKCj9FbZEVFJRxO9s=
-github.com/mitchellh/mapstructure v1.5.0 h1:jeMsZIYE/09sWLaz43PL7Gy6RuMjD2eJVyuac5Z2hdY=
-github.com/mitchellh/mapstructure v1.5.0/go.mod h1:bFUtVrKA4DC2yAKiSyO/QUcy7e+RRV2QTWOzhPopBRo=
 github.com/mitchellh/reflectwalk v1.0.2 h1:G2LzWKi524PWgd3mLHV8Y5k7s6XUvT0Gef6zxSIeXaQ=
 github.com/mitchellh/reflectwalk v1.0.2/go.mod h1:mSTlrgnPZtwu0c4WaC2kGObEpuNDbx0jmZXqmk4esnw=
+github.com/nfnt/resize v0.0.0-20180221191011-83c6a9932646 h1:zYyBkD/k9seD2A7fsi6Oo2LfFZAehjjQMERAvZLEDnQ=
+github.com/nfnt/resize v0.0.0-20180221191011-83c6a9932646/go.mod h1:jpp1/29i3P1S/RLdc7JQKbRpFeM1dOBd8T9ki5s+AY8=
 github.com/pelletier/go-toml v1.9.5 h1:4yBQzkHv+7BHq2PQUZF3Mx0IYxG7LsP222s7Agd3ve8=
 github.com/pelletier/go-toml v1.9.5/go.mod h1:u1nR/EPcESfeI/szUZKdtJ0xRNbUoANCkoOuaOx1Y+c=
 github.com/pmezard/go-difflib v1.0.0 h1:4DBwDE0NGyQoBHbLQYPwSUPoCMWR5BEzIk/f1lZbAQM=
@@ -39,19 +62,29 @@ github.com/spf13/pflag v1.0.5 h1:iy+VFUOCP1a+8yFto/drg2CJ5u0yRoB7fZw3DKv/JXA=
 github.com/spf13/pflag v1.0.5/go.mod h1:McXfInJRrz4CZXVZOBLb0bTZqETkiAhM9Iw0y3An2Bg=
 github.com/stretchr/objx v0.1.0/go.mod h1:HFkY916IF+rwdDfMAkV7OtwuqBVzrE8GR6GFx+wExME=
 github.com/stretchr/testify v1.3.0/go.mod h1:M5WIy9Dh21IEIfnGCwXGc5bZfKNJtfHm1UVUgZn+9EI=
-github.com/stretchr/testify v1.8.1 h1:w7B6lhMri9wdJUVmEZPGGhZzrYTPvgJArz7wNPgYKsk=
-github.com/stretchr/testify v1.8.1/go.mod h1:w2LPCIKwWwSfY2zedu0+kehJoqGctiVI29o6fzry7u4=
+github.com/stretchr/testify v1.8.4 h1:CcVxjf3Q8PM0mHUKJCdn+eZZtm5yQwehR5yeSVQQcUk=
+github.com/stretchr/testify v1.8.4/go.mod h1:sz/lmYIOXD/1dqDmKjjqLyZ2RngseejIcXlSw2iwfAo=
+github.com/tlinden/yadu v0.1.3 h1:5cRCUmj+l5yvlM2irtpFBIJwVV2DPEgYSaWvF19FtcY=
+github.com/tlinden/yadu v0.1.3/go.mod h1:l3bRmHKL9zGAR6pnBHY2HRPxBecf7L74BoBgOOpTcUA=
 golang.org/x/crypto v0.0.0-20190308221718-c2843e01d9a2/go.mod h1:djNgcEr1/C05ACkg1iLfiJU5Ep61QUkGW8qpdssI0+w=
+golang.org/x/image v0.23.0 h1:HseQ7c2OpPKTPVzNjG5fwJsOTCiiwS4QdsYi5XU6H68=
+golang.org/x/image v0.23.0/go.mod h1:wJJBTdLfCCf3tiHa1fNxpZmUI4mmoZvwMCPP0ddoNKY=
 golang.org/x/net v0.0.0-20180218175443-cbe0f9307d01/go.mod h1:mL1N/T3taQHkDXs73rZJwtUhF3w3ftmwwsq0BUmARs4=
 golang.org/x/net v0.0.0-20181114220301-adae6a3d119a/go.mod h1:mL1N/T3taQHkDXs73rZJwtUhF3w3ftmwwsq0BUmARs4=
-golang.org/x/net v0.0.0-20190606173856-1492cefac77f h1:IWHgpgFqnL5AhBUBZSgBdjl2vkQUEzcY+JNKWfcgAU0=
 golang.org/x/net v0.0.0-20190606173856-1492cefac77f/go.mod h1:HSz+uSET+XFnRR8LxR5pz3Of3rY3CfYBVs4xY44aLks=
-golang.org/x/sync v0.5.0 h1:60k92dhOjHxJkrqnwsfl8KuaHbn/5dl0lUPUklKo3qE=
-golang.org/x/sync v0.5.0/go.mod h1:Czt+wKu1gCyEFDUtn0jG5QVvpJ6rzVqr5aXyt9drQfk=
+golang.org/x/net v0.0.0-20200202094626-16171245cfb2/go.mod h1:z5CRVTTTmAJ677TzLLGU+0bjPO0LkuOLi4/5GtJWs/s=
+golang.org/x/net v0.23.0 h1:7EYJ93RZ9vYSZAIb2x3lnuvqO5zneoD6IvWjuhfxjTs=
+golang.org/x/net v0.23.0/go.mod h1:JKghWKKOSdJwpW2GEx0Ja7fmaKnMsbu+MWVZTokSYmg=
+golang.org/x/sync v0.10.0 h1:3NQrjDixjgGwUOCaF8w2+VYHv0Ve/vGYSbdkTa98gmQ=
+golang.org/x/sync v0.10.0/go.mod h1:Czt+wKu1gCyEFDUtn0jG5QVvpJ6rzVqr5aXyt9drQfk=
 golang.org/x/sys v0.0.0-20190215142949-d0b11bdaac8a/go.mod h1:STP8DvDyc/dI5b8T5hshtkjS+E42TnysNCUPdjciGhY=
-golang.org/x/sys v0.0.0-20220908164124-27713097b956/go.mod h1:oPkhp1MJrh7nUepCBck5+mAzfO9JrbApNNgaTdGDITg=
-golang.org/x/sys v0.6.0 h1:MVltZSvRTcU2ljQOhs94SXPftV6DCNnZViHeQps87pQ=
+golang.org/x/sys v0.0.0-20220811171246-fbc7d0a398ab/go.mod h1:oPkhp1MJrh7nUepCBck5+mAzfO9JrbApNNgaTdGDITg=
 golang.org/x/sys v0.6.0/go.mod h1:oPkhp1MJrh7nUepCBck5+mAzfO9JrbApNNgaTdGDITg=
+golang.org/x/sys v0.21.0 h1:rF+pYz3DAGSQAxAu1CbC7catZg4ebC4UIeIhKxBZvws=
+golang.org/x/sys v0.21.0/go.mod h1:/VUhepiaJMQUp4+oa/7Zr1D23ma6VTLIYjOOTFZPUcA=
 golang.org/x/text v0.3.0/go.mod h1:NqM8EUOU14njkJ3fqMW+pc6Ldnwhi/IjpwHt7yyuwOQ=
+gopkg.in/check.v1 v0.0.0-20161208181325-20d25e280405/go.mod h1:Co6ibVJAznAaIkqp8huTwlJQCZ016jof/cbN4VW5Yz0=
+gopkg.in/check.v1 v1.0.0-20190902080502-41f04d3bba15 h1:YR8cESwS4TdDjEe65xsg0ogRM/Nc3DYOhEAlW+xobZo=
+gopkg.in/check.v1 v1.0.0-20190902080502-41f04d3bba15/go.mod h1:Co6ibVJAznAaIkqp8huTwlJQCZ016jof/cbN4VW5Yz0=
 gopkg.in/yaml.v3 v3.0.1 h1:fxVm/GzAzEWqLHuvctI91KS9hhNmmWOoWu0XTYJS7CA=
 gopkg.in/yaml.v3 v3.0.1/go.mod h1:K4uyk7z7BCEPqu6E+C64Yfv1cQ7kz7rIZviUmN+EgEM=

http.go

@@ -0,0 +1,138 @@
+/*
+Copyright © 2023-2024 Thomas von Dein
+
+This program is free software: you can redistribute it and/or modify
+it under the terms of the GNU General Public License as published by
+the Free Software Foundation, either version 3 of the License, or
+(at your option) any later version.
+
+This program is distributed in the hope that it will be useful,
+but WITHOUT ANY WARRANTY; without even the implied warranty of
+MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+GNU General Public License for more details.
+
+You should have received a copy of the GNU General Public License
+along with this program. If not, see <http://www.gnu.org/licenses/>.
+*/
+
+package main
+
+import (
+	"bytes"
+	"fmt"
+	"io"
+	"log/slog"
+	"math"
+	"math/rand"
+	"net/http"
+	"time"
+)
+
+// I add an artificial "ID" to each HTTP request and the corresponding
+// respose for  debugging purposes  so that  the pair  of them  can be
+// easier associated in debug output
+var letters = []rune("ABCDEF0123456789")
+
+const IDLEN int = 8
+
+// retry after HTTP 50x errors or err!=nil
+const RetryCount = 3
+
+func getid() string {
+	b := make([]rune, IDLEN)
+	for i := range b {
+		b[i] = letters[rand.Intn(len(letters))]
+	}
+
+	return string(b)
+}
+
+// used to inject debug log and implement retries
+type loggingTransport struct{}
+
+// escalating timeout, $retry^2 seconds
+func backoff(retries int) time.Duration {
+	return time.Duration(math.Pow(2, float64(retries))) * time.Second
+}
+
+// only retry in case of errors or certain non 200 HTTP codes
+func shouldRetry(err error, resp *http.Response) bool {
+	if err != nil {
+		return true
+	}
+
+	if resp.StatusCode == http.StatusBadGateway ||
+		resp.StatusCode == http.StatusServiceUnavailable ||
+		resp.StatusCode == http.StatusGatewayTimeout {
+		return true
+	}
+
+	return false
+}
+
+// Body needs to be drained, otherwise we can't reuse the http.Response
+func drainBody(resp *http.Response) {
+	if resp != nil {
+		if resp.Body != nil {
+			_, err := io.Copy(io.Discard, resp.Body)
+			if err != nil {
+				// unable to copy data? uff!
+				panic(err)
+			}
+
+			resp.Body.Close()
+		}
+	}
+}
+
+// the actual logging transport with retries
+func (t *loggingTransport) RoundTrip(req *http.Request) (*http.Response, error) {
+	// just required for debugging
+	requestid := getid()
+
+	// clone the request body, put into request on retry
+	var bodyBytes []byte
+	if req.Body != nil {
+		bodyBytes, _ = io.ReadAll(req.Body)
+		req.Body = io.NopCloser(bytes.NewBuffer(bodyBytes))
+	}
+
+	slog.Debug("REQUEST", "id", requestid, "uri", req.URL, "host", req.Host)
+
+	// first try
+	resp, err := http.DefaultTransport.RoundTrip(req)
+	if err == nil {
+		slog.Debug("RESPONSE", "id", requestid, "status", resp.StatusCode,
+			"contentlength", resp.ContentLength)
+	}
+
+	// enter retry check and loop, if first req were successful, leave loop immediately
+	retries := 0
+	for shouldRetry(err, resp) && retries < RetryCount {
+		time.Sleep(backoff(retries))
+
+		// consume any response to reuse the connection.
+		drainBody(resp)
+
+		// clone the request body again
+		if req.Body != nil {
+			req.Body = io.NopCloser(bytes.NewBuffer(bodyBytes))
+		}
+
+		// actual retry
+		resp, err = http.DefaultTransport.RoundTrip(req)
+
+		if err == nil {
+			slog.Debug("RESPONSE", "id", requestid, "status", resp.StatusCode,
+				"contentlength", resp.ContentLength, "retry", retries)
+		}
+
+		retries++
+	}
+
+	if err != nil {
+		return resp, fmt.Errorf("failed to get HTTP response for %s: %w", req.URL, err)
+	}
+
+	return resp, nil
+}

image.go

@@ -0,0 +1,191 @@
+/*
+Copyright © 2023-2024 Thomas von Dein
+
+This program is free software: you can redistribute it and/or modify
+it under the terms of the GNU General Public License as published by
+the Free Software Foundation, either version 3 of the License, or
+(at your option) any later version.
+
+This program is distributed in the hope that it will be useful,
+but WITHOUT ANY WARRANTY; without even the implied warranty of
+MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+GNU General Public License for more details.
+
+You should have received a copy of the GNU General Public License
+along with this program. If not, see <http://www.gnu.org/licenses/>.
+*/
+
+package main
+
+import (
+	"bytes"
+	"fmt"
+	"image"
+	_ "image/gif"
+	_ "image/jpeg"
+	_ "image/png"
+	"log/slog"
+	"os"
+	"path/filepath"
+
+	_ "golang.org/x/image/webp"
+
+	"github.com/corona10/goimagehash"
+)
+
+const MaxDistance = 3
+
+type Image struct {
+	Filename string
+	Hash     *goimagehash.ImageHash
+	Data     *bytes.Reader
+	URI      string
+	Mime     string
+}
+
+// used for logging to avoid printing Data
+func (img *Image) LogValue() slog.Value {
+	return slog.GroupValue(
+		slog.String("filename", img.Filename),
+		slog.String("uri", img.URI),
+		slog.String("hash", img.Hash.ToString()),
+	)
+}
+
+// holds all images of an ad
+type Cache []*goimagehash.ImageHash
+
+// filename comes from the scraper, it contains directory/base w/o suffix
+func NewImage(buf *bytes.Reader, filename, uri string) (*Image, error) {
+	_, imgconfig, err := image.DecodeConfig(buf)
+	if err != nil {
+		return nil, fmt.Errorf("failed to decode image: %w", err)
+	}
+
+	_, err = buf.Seek(0, 0)
+	if err != nil {
+		return nil, fmt.Errorf("failed to seek(0) on image buffer: %w", err)
+	}
+
+	if imgconfig == "jpeg" {
+		// we're  using the  format as file  extension, but  have used
+		// "jpg" in the past, so to be backwards compatible, stay with
+		// it.
+		imgconfig = "jpg"
+	}
+
+	if imgconfig == "" {
+		return nil, fmt.Errorf("failed to process image: unknown or unsupported image format (supported: jpg,png,gif,webp)")
+	}
+
+	filename += "." + imgconfig
+
+	img := &Image{
+		Filename: filename,
+		URI:      uri,
+		Data:     buf,
+		Mime:     imgconfig,
+	}
+
+	slog.Debug("image MIME", "mime", img.Mime)
+
+	return img, nil
+}
+
+// Calculate diff hash of the image
+func (img *Image) CalcHash() error {
+	jpgdata, format, err := image.Decode(img.Data)
+	if err != nil {
+		return fmt.Errorf("failed to decode image: %w", err)
+	}
+
+	if format == "" {
+		return fmt.Errorf("failed to decode image: unknown or unsupported image format (supported: jpg,png,gif,webp)")
+	}
+
+	hash1, err := goimagehash.DifferenceHash(jpgdata)
+	if err != nil {
+		return fmt.Errorf("failed to calculate diff hash of image: %w", err)
+	}
+
+	img.Hash = hash1
+
+	return nil
+}
+
+// checks if 2 images are similar enough to be considered the same
+func (img *Image) Similar(hash *goimagehash.ImageHash) bool {
+	distance, err := img.Hash.Distance(hash)
+	if err != nil {
+		slog.Debug("failed to compute diff hash distance", "error", err)
+
+		return false
+	}
+
+	if distance < MaxDistance {
+		slog.Debug("distance computation", "image-A", img.Hash.ToString(),
+			"image-B", hash.ToString(), "distance", distance)
+
+		return true
+	}
+
+	return false
+}
+
+// check current image against all known hashes.
+func (img *Image) SimilarExists(cache Cache) bool {
+	for _, otherimg := range cache {
+		if img.Similar(otherimg) {
+			return true
+		}
+	}
+
+	return false
+}
+
+// read all  JPG images  in a  ad directory,  compute diff  hashes and
+// store the results in the slice Images
+func ReadImages(addir string, dont bool) (Cache, error) {
+	files, err := os.ReadDir(addir)
+	if err != nil {
+		return nil, fmt.Errorf("failed to read ad directory contents: %w", err)
+	}
+
+	cache := Cache{}
+
+	if dont {
+		// forced download, -f given
+		return cache, nil
+	}
+
+	for _, file := range files {
+		ext := filepath.Ext(file.Name())
+		if !file.IsDir() && (ext == ".jpg" || ext == ".jpeg" || ext == ".JPG" || ext == ".JPEG") {
+			filename := filepath.Join(addir, file.Name())
+
+			data, err := ReadImage(filename)
+			if err != nil {
+				return nil, err
+			}
+
+			reader := bytes.NewReader(data.Bytes())
+
+			img, err := NewImage(reader, filename, "")
+			if err != nil {
+				return nil, err
+			}
+
+			if err := img.CalcHash(); err != nil {
+				return nil, err
+			}
+
+			if img.Hash != nil {
+				slog.Debug("Caching image from file system", "image", img, "hash", img.Hash.ToString())
+			}
+
+			cache = append(cache, img.Hash)
+		}
+	}
+
+	return cache, nil
+}

kleingebaeck.1

@@ -133,7 +133,7 @@
 .\" ========================================================================
 .\"
 .IX Title "KLEINGEBAECK 1"
-.TH KLEINGEBAECK 1 "2023-12-19" "1" "User Commands"
+.TH KLEINGEBAECK 1 "2024-02-10" "1" "User Commands"
 .\" For nroff, turn off justification.  Always turn off hyphenation; it makes
 .\" way too many mistakes in technical documents.
 .if n .ad l
@@ -145,14 +145,17 @@ kleingebaeck \- kleinanzeigen.de backup tool
 .Vb 10
 \&    Usage: kleingebaeck [\-dvVhmoc] [<ad\-listing\-url>,...]
 \&    Options:
-\&    \-\-user    \-u <uid>      Backup ads from user with uid <uid>.
-\&    \-\-debug   \-d            Enable debug output.
-\&    \-\-verbose \-v            Enable verbose output.
-\&    \-\-outdir  \-o <dir>      Set output dir (default: current directory)
-\&    \-\-limit   \-l <num>      Limit the ads to download to <num>, default: load all.
-\&    \-\-config  \-c <file>     Use config file <file> (default: ~/.kleingebaeck).
-\&    \-\-manual  \-m            Show manual.
-\&    \-\-help    \-h            Show usage.
+\&    \-u \-\-user    <uid>      Backup ads from user with uid <uid>.
+\&    \-d \-\-debug              Enable debug output.
+\&    \-v \-\-verbose            Enable verbose output.
+\&    \-o \-\-outdir  <dir>      Set output dir (default: current directory)
+\&    \-l \-\-limit   <num>      Limit the ads to download to <num>, default: load all.
+\&    \-c \-\-config  <file>     Use config file <file> (default: ~/.kleingebaeck).
+\&       \-\-ignoreerrors       Ignore HTTP errors, may lead to incomplete ad backup.
+\&    \-f \-\-force              Overwrite images and ads even if the already exist.
+\&    \-m \-\-manual             Show manual.
+\&    \-h \-\-help               Show usage.
+\&    \-V \-\-version            Show program version.
 .Ve
 .SH "DESCRIPTION"
 .IX Header "DESCRIPTION"
@@ -171,14 +174,15 @@ well.   We    use   \s-1TOML\s0   as   our    configuration   language.   See
 .PP
 Format is pretty simple:
 .PP
-.Vb 10
+.Vb 11
 \&    user = 1010101
 \&    loglevel = verbose
 \&    outdir = "test"
+\&    useragent = "Mozilla/5.0"
 \&    template = """
 \&    Title: {{.Title}}
 \&    Price: {{.Price}}
-\&    Id: {{.Id}}
+\&    Id: {{.ID}}
 \&    Category: {{.Category}}
 \&    Condition: {{.Condition}}
 \&    Created: {{.Created}}
@@ -187,11 +191,11 @@ Format is pretty simple:
 \&    """
 .Ve
 .PP
-Be carefull  if you want  to change the  template.  The variable  is a
+Be careful  if you want  to change the  template.  The variable  is a
 multiline string surrounded  by three double quotes. You  can left out
 certain   fields  and   use  any   formatting  you   like.  Refer   to
 <https://pkg.go.dev/text/template>  for   details  how  to   write  a
-template.
+template. Also read the \s-1TEMPLATES\s0 section below.
 .PP
 If you're on  windows and want to customize the  output directory, put
 it into single  quotes to avoid the backslashes  interpreted as escape
@@ -200,6 +204,94 @@ chars like this:
 .Vb 1
 \&    outdir = \*(AqC:\eData\eAds\*(Aq
 .Ve
+.SH "TEMPLATES"
+.IX Header "TEMPLATES"
+Various parts  of the configuration  can be modified  using templates:
+the output directory, the ad directory and the ad listing itself.
+.SS "\s-1OUTPUT DIR TEMPLATE\s0"
+.IX Subsection "OUTPUT DIR TEMPLATE"
+The config varialbe \f(CW\*(C`outdir\*(C'\fR or the command line parameter \f(CW\*(C`\-o\*(C'\fR take a
+template which may contain:
+.ie n .IP """{{.Year}}""" 4
+.el .IP "\f(CW{{.Year}}\fR" 4
+.IX Item "{{.Year}}"
+.PD 0
+.ie n .IP """{{.Month}}""" 4
+.el .IP "\f(CW{{.Month}}\fR" 4
+.IX Item "{{.Month}}"
+.ie n .IP """{{.Day}}""" 4
+.el .IP "\f(CW{{.Day}}\fR" 4
+.IX Item "{{.Day}}"
+.PD
+.PP
+That way you can create a new output directory for every backup
+run. For example:
+.PP
+.Vb 1
+\&    outdir = "/home/backups/ads\-{{.Year}}\-{{.Month}}\-{{.Day}}"
+.Ve
+.PP
+Or using the command line flag:
+.PP
+.Vb 1
+\&    \-o "/home/backups/ads\-{{.Year}}\-{{.Month}}\-{{.Day}}"
+.Ve
+.PP
+The default value is \f(CW\*(C`.\*(C'\fR \- the current directory.
+.SS "\s-1AD DIRECTORY TEMPLATE\s0"
+.IX Subsection "AD DIRECTORY TEMPLATE"
+The ad directory name can be modified using the following ad values:
+.IP "{{.Price}}" 4
+.IX Item "{{.Price}}"
+.PD 0
+.IP "{{.ID}}" 4
+.IX Item "{{.ID}}"
+.IP "{{.Category}}" 4
+.IX Item "{{.Category}}"
+.IP "{{.Condition}}" 4
+.IX Item "{{.Condition}}"
+.IP "{{.Created}}" 4
+.IX Item "{{.Created}}"
+.IP "{{.Slug}}" 4
+.IX Item "{{.Slug}}"
+.IP "{{.Text}}" 4
+.IX Item "{{.Text}}"
+.PD
+.PP
+It can only be configured in the config file. By default only
+\&\f(CW\*(C`{{.Slug}}\*(C'\fR is being used, this is the title of the ad in url format.
+.SS "\s-1AD TEMPLATE\s0"
+.IX Subsection "AD TEMPLATE"
+The ad listing itself can be modified as well, using the same
+variables as the ad name template above.
+.PP
+This is the default template:
+.PP
+.Vb 7
+\&    Title: {{.Title}}
+\&    Price: {{.Price}}
+\&    Id: {{.ID}}
+\&    Category: {{.Category}}
+\&    Condition: {{.Condition}}
+\&    Created: {{.Created}}
+\&    Expire: {{.Expire}}
+\&    
+\&    {{.Text}}
+.Ve
+.PP
+The config parameter to modify is \f(CW\*(C`template\*(C'\fR. See example.conf in the
+source repository. Please take care, since this is a multiline
+string. This is how it shall look if you modify it:
+.PP
+.Vb 2
+\&    template="""
+\&    Title: {{.Title}}
+\&    
+\&    {{.Text}}
+\&    """
+.Ve
+.PP
+That is, the content between the two \f(CW"""\fR chars is the template.
 .SH "SETUP"
 .IX Header "SETUP"
 To setup the tool, you need to lookup your userid on
@@ -217,6 +309,22 @@ directory. Then just execute \f(CW\*(C`kleingebaeck\*(C'\fR.
 .PP
 You can use the \fB\-v\fR option to  get verbose output or \fB\-d\fR to enable
 debugging.
+.SH "ENVIRONMENT VARIABLES"
+.IX Header "ENVIRONMENT VARIABLES"
+The following environment variables  are considered:
+.PP
+.Vb 7
+\&    KLEINGEBAECK_USER
+\&    KLEINGEBAECK_DEBUG
+\&    KLEINGEBAECK_VERBOSE
+\&    KLEINGEBAECK_OUTDIR
+\&    KLEINGEBAECK_LIMIT
+\&    KLEINGEBAECK_CONFIG
+\&    KLEINGEBAECK_IGNOREERRORS
+.Ve
+.PP
+Please  note,  that  they  take   precedence  over  config  file,  but
+commandline flags take precedence over env!
 .SH "BUGS"
 .IX Header "BUGS"
 In order to report a bug, unexpected behavior, feature requests
@@ -235,7 +343,20 @@ Also there's currently no parallelization implemented. This will
 change in the future.
 .SH "LICENSE"
 .IX Header "LICENSE"
-Licensed under the \s-1GNU GENERAL PUBLIC LICENSE\s0 version 3.
+Copyright 2023\-2024 Thomas von Dein
+.PP
+This program is free software: you can redistribute it and/or modify
+it under the terms of the \s-1GNU\s0 General Public License as published by
+the Free Software Foundation, either version 3 of the License, or
+(at your option) any later version.
+.PP
+This program is distributed in the hope that it will be useful,
+but \s-1WITHOUT ANY WARRANTY\s0; without even the implied warranty of
+\&\s-1MERCHANTABILITY\s0 or \s-1FITNESS FOR A PARTICULAR PURPOSE.\s0  See the
+\&\s-1GNU\s0 General Public License for more details.
+.PP
+You should have received a copy of the \s-1GNU\s0 General Public License
+along with this program. If not, see <http://www.gnu.org/licenses/>.
 .SH "Author"
 .IX Header "Author"
 T.v.Dein <tom \s-1AT\s0 vondein \s-1DOT\s0 org>

kleingebaeck.go

@@ -7,14 +7,17 @@ NAME
 SYNOPSYS
         Usage: kleingebaeck [-dvVhmoc] [<ad-listing-url>,...]
         Options:
-        --user    -u <uid>      Backup ads from user with uid <uid>.
-        --debug   -d            Enable debug output.
-        --verbose -v            Enable verbose output.
-        --outdir  -o <dir>      Set output dir (default: current directory)
-        --limit   -l <num>      Limit the ads to download to <num>, default: load all.
-        --config  -c <file>     Use config file <file> (default: ~/.kleingebaeck).
-        --manual  -m            Show manual.
-        --help    -h            Show usage.
+        -u --user    <uid>      Backup ads from user with uid <uid>.
+        -d --debug              Enable debug output.
+        -v --verbose            Enable verbose output.
+        -o --outdir  <dir>      Set output dir (default: current directory)
+        -l --limit   <num>      Limit the ads to download to <num>, default: load all.
+        -c --config  <file>     Use config file <file> (default: ~/.kleingebaeck).
+           --ignoreerrors       Ignore HTTP errors, may lead to incomplete ad backup.
+        -f --force              Overwrite images and ads even if the already exist.
+        -m --manual             Show manual.
+        -h --help               Show usage.
+        -V --version            Show program version.
 
 DESCRIPTION
     This tool can be used to backup ads on the german ad page
@@ -36,10 +39,11 @@ CONFIGURATION
         user = 1010101
         loglevel = verbose
         outdir = "test"
+        useragent = "Mozilla/5.0"
         template = """
         Title: {{.Title}}
         Price: {{.Price}}
-        Id: {{.Id}}
+        Id: {{.ID}}
         Category: {{.Category}}
         Condition: {{.Condition}}
         Created: {{.Created}}
@@ -47,10 +51,11 @@ CONFIGURATION
         {{.Text}}
         """
 
-    Be carefull if you want to change the template. The variable is a
+    Be careful if you want to change the template. The variable is a
     multiline string surrounded by three double quotes. You can left out
     certain fields and use any formatting you like. Refer to
     <https://pkg.go.dev/text/template> for details how to write a template.
+    Also read the TEMPLATES section below.
 
     If you're on windows and want to customize the output directory, put it
     into single quotes to avoid the backslashes interpreted as escape chars
@@ -58,6 +63,71 @@ CONFIGURATION
 
         outdir = 'C:\Data\Ads'
 
+TEMPLATES
+    Various parts of the configuration can be modified using templates: the
+    output directory, the ad directory and the ad listing itself.
+
+  OUTPUT DIR TEMPLATE
+    The config varialbe "outdir" or the command line parameter "-o" take a
+    template which may contain:
+
+    "{{.Year}}"
+    "{{.Month}}"
+    "{{.Day}}"
+
+    That way you can create a new output directory for every backup run. For
+    example:
+
+        outdir = "/home/backups/ads-{{.Year}}-{{.Month}}-{{.Day}}"
+
+    Or using the command line flag:
+
+        -o "/home/backups/ads-{{.Year}}-{{.Month}}-{{.Day}}"
+
+    The default value is "." - the current directory.
+
+  AD DIRECTORY TEMPLATE
+    The ad directory name can be modified using the following ad values:
+
+    {{.Price}}
+    {{.ID}}
+    {{.Category}}
+    {{.Condition}}
+    {{.Created}}
+    {{.Slug}}
+    {{.Text}}
+
+    It can only be configured in the config file. By default only
+    "{{.Slug}}" is being used, this is the title of the ad in url format.
+
+  AD TEMPLATE
+    The ad listing itself can be modified as well, using the same variables
+    as the ad name template above.
+
+    This is the default template:
+
+        Title: {{.Title}}
+        Price: {{.Price}}
+        Id: {{.ID}}
+        Category: {{.Category}}
+        Condition: {{.Condition}}
+        Created: {{.Created}}
+        Expire: {{.Expire}}
+    
+        {{.Text}}
+
+    The config parameter to modify is "template". See example.conf in the
+    source repository. Please take care, since this is a multiline string.
+    This is how it shall look if you modify it:
+
+        template="""
+        Title: {{.Title}}
+    
+        {{.Text}}
+        """
+
+    That is, the content between the two """ chars is the template.
+
 SETUP
     To setup the tool, you need to lookup your userid on kleinanzeigen.de.
     Go to your ad overview page while NOT being logged in:
@@ -72,6 +142,20 @@ SETUP
     You can use the -v option to get verbose output or -d to enable
     debugging.
 
+ENVIRONMENT VARIABLES
+    The following environment variables are considered:
+
+        KLEINGEBAECK_USER
+        KLEINGEBAECK_DEBUG
+        KLEINGEBAECK_VERBOSE
+        KLEINGEBAECK_OUTDIR
+        KLEINGEBAECK_LIMIT
+        KLEINGEBAECK_CONFIG
+        KLEINGEBAECK_IGNOREERRORS
+
+    Please note, that they take precedence over config file, but commandline
+    flags take precedence over env!
+
 BUGS
     In order to report a bug, unexpected behavior, feature requests or to
     submit a patch, please open an issue on github:
@@ -89,7 +173,20 @@ LIMITATIONS
     in the future.
 
 LICENSE
-    Licensed under the GNU GENERAL PUBLIC LICENSE version 3.
+    Copyright 2023-2024 Thomas von Dein
+
+    This program is free software: you can redistribute it and/or modify it
+    under the terms of the GNU General Public License as published by the
+    Free Software Foundation, either version 3 of the License, or (at your
+    option) any later version.
+
+    This program is distributed in the hope that it will be useful, but
+    WITHOUT ANY WARRANTY; without even the implied warranty of
+    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General
+    Public License for more details.
+
+    You should have received a copy of the GNU General Public License along
+    with this program. If not, see <http://www.gnu.org/licenses/>.
 
 Author
     T.v.Dein <tom AT vondein DOT org>

kleingebaeck.pod

@@ -6,15 +6,17 @@ kleingebaeck - kleinanzeigen.de backup tool
     
     Usage: kleingebaeck [-dvVhmoc] [<ad-listing-url>,...]
     Options:
-    --user    -u <uid>      Backup ads from user with uid <uid>.
-    --debug   -d            Enable debug output.
-    --verbose -v            Enable verbose output.
-    --outdir  -o <dir>      Set output dir (default: current directory)
-    --limit   -l <num>      Limit the ads to download to <num>, default: load all.
-    --config  -c <file>     Use config file <file> (default: ~/.kleingebaeck).
-    --manual  -m            Show manual.
-    --help    -h            Show usage.
-    --version -V            Show program version.
+    -u --user    <uid>      Backup ads from user with uid <uid>.
+    -d --debug              Enable debug output.
+    -v --verbose            Enable verbose output.
+    -o --outdir  <dir>      Set output dir (default: current directory)
+    -l --limit   <num>      Limit the ads to download to <num>, default: load all.
+    -c --config  <file>     Use config file <file> (default: ~/.kleingebaeck).
+       --ignoreerrors       Ignore HTTP errors, may lead to incomplete ad backup.
+    -f --force              Overwrite images and ads even if the already exist.
+    -m --manual             Show manual.
+    -h --help               Show usage.
+    -V --version            Show program version.
 
 =head1 DESCRIPTION
 
@@ -37,10 +39,11 @@ Format is pretty simple:
     user = 1010101
     loglevel = verbose
     outdir = "test"
+    useragent = "Mozilla/5.0"
     template = """
     Title: {{.Title}}
     Price: {{.Price}}
-    Id: {{.Id}}
+    Id: {{.ID}}
     Category: {{.Category}}
     Condition: {{.Condition}}
     Created: {{.Created}}
@@ -48,11 +51,11 @@ Format is pretty simple:
     {{.Text}}
     """
 
-Be carefull  if you want  to change the  template.  The variable  is a
+Be careful  if you want  to change the  template.  The variable  is a
 multiline string surrounded  by three double quotes. You  can left out
 certain   fields  and   use  any   formatting  you   like.  Refer   to
 L<https://pkg.go.dev/text/template>  for   details  how  to   write  a
-template.
+template. Also read the TEMPLATES section below.
 
 If you're on  windows and want to customize the  output directory, put
 it into single  quotes to avoid the backslashes  interpreted as escape
@@ -60,6 +63,91 @@ chars like this:
 
     outdir = 'C:\Data\Ads'
 
+=head1 TEMPLATES
+
+Various parts  of the configuration  can be modified  using templates:
+the output directory, the ad directory and the ad listing itself.
+
+=head2 OUTPUT DIR TEMPLATE
+
+The config varialbe C<outdir> or the command line parameter C<-o> take a
+template which may contain:
+
+=over
+
+=item C<{{.Year}}>
+
+=item C<{{.Month}}>
+
+=item C<{{.Day}}>
+
+=back
+
+That way you can create a new output directory for every backup
+run. For example:
+
+    outdir = "/home/backups/ads-{{.Year}}-{{.Month}}-{{.Day}}"
+
+Or using the command line flag:
+
+    -o "/home/backups/ads-{{.Year}}-{{.Month}}-{{.Day}}"
+
+The default value is C<.> - the current directory.
+
+=head2 AD DIRECTORY TEMPLATE
+
+The ad directory name can be modified using the following ad values:
+
+=over
+
+=item {{.Price}}
+
+=item {{.ID}}
+
+=item {{.Category}}
+
+=item {{.Condition}}
+
+=item {{.Created}}
+
+=item {{.Slug}}
+
+=item {{.Text}}
+
+=back
+
+It can only be configured in the config file. By default only
+C<{{.Slug}}> is being used, this is the title of the ad in url format.
+
+=head2 AD TEMPLATE
+
+The ad listing itself can be modified as well, using the same
+variables as the ad name template above.
+
+This is the default template:
+
+    Title: {{.Title}}
+    Price: {{.Price}}
+    Id: {{.ID}}
+    Category: {{.Category}}
+    Condition: {{.Condition}}
+    Created: {{.Created}}
+    Expire: {{.Expire}}
+    
+    {{.Text}}
+
+The config parameter to modify is C<template>. See example.conf in the
+source repository. Please take care, since this is a multiline
+string. This is how it shall look if you modify it:
+
+    template="""
+    Title: {{.Title}}
+    
+    {{.Text}}
+    """
+
+That is, the content between the two C<"""> chars is the template.
+
 =head1 SETUP
 
 To setup the tool, you need to lookup your userid on
@@ -76,6 +164,23 @@ directory. Then just execute C<kleingebaeck>.
 You can use the B<-v> option to  get verbose output or B<-d> to enable
 debugging.
 
+=head1 ENVIRONMENT VARIABLES
+
+The following environment variables  are considered:
+
+    KLEINGEBAECK_USER
+    KLEINGEBAECK_DEBUG
+    KLEINGEBAECK_VERBOSE
+    KLEINGEBAECK_OUTDIR
+    KLEINGEBAECK_LIMIT
+    KLEINGEBAECK_CONFIG
+    KLEINGEBAECK_IGNOREERRORS
+
+Please  note,  that  they  take   precedence  over  config  file,  but
+commandline flags take precedence over env!
+
+
+
 =head1 BUGS
 
 In order to report a bug, unexpected behavior, feature requests
@@ -96,7 +201,20 @@ change in the future.
 
 =head1 LICENSE
 
-Licensed under the GNU GENERAL PUBLIC LICENSE version 3.
+Copyright 2023-2024 Thomas von Dein
+
+This program is free software: you can redistribute it and/or modify
+it under the terms of the GNU General Public License as published by
+the Free Software Foundation, either version 3 of the License, or
+(at your option) any later version.
+
+This program is distributed in the hope that it will be useful,
+but WITHOUT ANY WARRANTY; without even the implied warranty of
+MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+GNU General Public License for more details.
+
+You should have received a copy of the GNU General Public License
+along with this program. If not, see L<http://www.gnu.org/licenses/>.
 
 =head1 Author
 

main.go

@@ -1,5 +1,5 @@
 /*
-Copyright © 2023 Thomas von Dein
+Copyright © 2023-2024 Thomas von Dein
 
 This program is free software: you can redistribute it and/or modify
 it under the terms of the GNU General Public License as published by
@@ -18,53 +18,82 @@ along with this program. If not, see <http://www.gnu.org/licenses/>.
 package main
 
 import (
+	"bufio"
 	"errors"
 	"fmt"
+	"io"
 	"log/slog"
 	"os"
+	"runtime"
 	"runtime/debug"
 
+	"github.com/inconshreveable/mousetrap"
 	"github.com/lmittmann/tint"
+	"github.com/tlinden/yadu"
 )
 
 const LevelNotice = slog.Level(2)
 
 func main() {
-	os.Exit(Main())
+	os.Exit(Main(os.Stdout))
 }
 
-func Main() int {
+func init() {
+	// if we're running on Windows  AND if the user double clicked the
+	// exe  file from explorer, we  tell them and then  wait until any
+	// key has been hit, which  will make the cmd window disappear and
+	// thus give the user time to read it.
+	if runtime.GOOS == "windows" {
+		if mousetrap.StartedByExplorer() {
+			fmt.Println("Do no double click kleingebaeck.exe!")
+			fmt.Println("Please open a command shell and run it from there.")
+			fmt.Println()
+			fmt.Print("Press any key to quit: ")
+			_, err := bufio.NewReader(os.Stdin).ReadString('\n')
+			if err != nil {
+				panic(err)
+			}
+		}
+	}
+}
+
+func Main(output io.Writer) int {
 	logLevel := &slog.LevelVar{}
 	opts := &tint.Options{
 		Level:     logLevel,
 		AddSource: false,
-		ReplaceAttr: func(groups []string, a slog.Attr) slog.Attr {
+		ReplaceAttr: func(groups []string, attr slog.Attr) slog.Attr {
 			// Remove time from the output
-			if a.Key == slog.TimeKey {
+			if attr.Key == slog.TimeKey {
 				return slog.Attr{}
 			}
-			return a
+
+			return attr
 		},
 		NoColor: IsNoTty(),
 	}
 
 	logLevel.Set(LevelNotice)
-	var handler slog.Handler = tint.NewHandler(os.Stdout, opts)
+
+	handler := tint.NewHandler(output, opts)
 	logger := slog.New(handler)
+
 	slog.SetDefault(logger)
 
-	conf, err := InitConfig()
+	conf, err := InitConfig(output)
 	if err != nil {
 		return Die(err)
 	}
 
 	if conf.Showversion {
-		fmt.Printf("This is kleingebaeck version %s\n", VERSION)
+		fmt.Fprintf(output, "This is kleingebaeck version %s\n", VERSION)
+
 		return 0
 	}
 
 	if conf.Showhelp {
-		fmt.Println(Usage)
+		fmt.Fprintln(output, Usage)
+
 		return 0
 	}
 
@@ -73,6 +102,7 @@ func Main() int {
 		if err != nil {
 			return Die(err)
 		}
+
 		return 0
 	}
 
@@ -83,14 +113,15 @@ func Main() int {
 	if conf.Debug {
 		// we're using a more verbose logger in debug mode
 		buildInfo, _ := debug.ReadBuildInfo()
-		opts := &tint.Options{
+		opts := &yadu.Options{
 			Level:     logLevel,
 			AddSource: true,
-			NoColor:   IsNoTty(),
+			//NoColor:   IsNoTty(),
 		}
 
 		logLevel.Set(slog.LevelDebug)
-		var handler slog.Handler = tint.NewHandler(os.Stdout, opts)
+
+		handler := yadu.NewHandler(output, opts)
 		debuglogger := slog.New(handler).With(
 			slog.Group("program_info",
 				slog.Int("pid", os.Getpid()),
@@ -103,38 +134,51 @@ func Main() int {
 	slog.Debug("config", "conf", conf)
 
 	// prepare output dir
-	err = Mkdir(conf.Outdir)
+	outdir, err := OutDirName(conf)
+	if err != nil {
+		return Die(err)
+	}
+	conf.Outdir = outdir
+
+	// used for all HTTP requests
+	fetch, err := NewFetcher(conf)
 	if err != nil {
 		return Die(err)
 	}
 
-	if len(conf.Adlinks) >= 1 {
+	// setup ad dir registry, needed to check for duplicates
+	DirsVisited = make(map[string]int)
+
+	switch {
+	case len(conf.Adlinks) >= 1:
 		// directly backup ad listing[s]
 		for _, uri := range conf.Adlinks {
-			err := Scrape(conf, uri)
+			err := ScrapeAd(fetch, uri)
 			if err != nil {
 				return Die(err)
 			}
 		}
-	} else if conf.User > 0 {
+	case conf.User > 0:
 		// backup all ads of the given user (via config or cmdline)
-		err := Start(conf)
+		err := ScrapeUser(fetch)
 		if err != nil {
 			return Die(err)
 		}
-	} else {
+	default:
 		return Die(errors.New("invalid or no user id or no ad link specified"))
 	}
 
 	if conf.StatsCountAds > 0 {
 		adstr := "ads"
+
 		if conf.StatsCountAds == 1 {
 			adstr = "ad"
 		}
-		fmt.Printf("Successfully downloaded %d %s with %d images to %s.\n",
+
+		fmt.Fprintf(output, "Successfully downloaded %d %s with %d images to %s.\n",
 			conf.StatsCountAds, adstr, conf.StatsCountImages, conf.Outdir)
 	} else {
-		fmt.Printf("No ads found.")
+		fmt.Fprintf(output, "No ads found.")
 	}
 
 	return 0
@@ -142,5 +186,6 @@ func Main() int {
 
 func Die(err error) int {
 	slog.Error("Failure", "error", err.Error())
+
 	return 1
 }

main_test.go

@@ -0,0 +1,573 @@
+/*
+Copyright © 2023-2024 Thomas von Dein
+
+This program is free software: you can redistribute it and/or modify
+it under the terms of the GNU General Public License as published by
+the Free Software Foundation, either version 3 of the License, or
+(at your option) any later version.
+
+This program is distributed in the hope that it will be useful,
+but WITHOUT ANY WARRANTY; without even the implied warranty of
+MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+GNU General Public License for more details.
+
+You should have received a copy of the GNU General Public License
+along with this program. If not, see <http://www.gnu.org/licenses/>.
+*/
+
+package main
+
+import (
+	"bytes"
+	"errors"
+	"fmt"
+	"net/http"
+	"os"
+	"strings"
+	"testing"
+	tpl "text/template"
+
+	"github.com/jarcoal/httpmock"
+)
+
+// the ad list, aka:
+// https://www.kleinanzeigen.de/s-bestandsliste.html?userId=XXXXXX
+// Note, that this HTML code is reduced to the max, so that it only
+// contains the stuff required to satisfy goquery
+const LISTTPL string = `<!DOCTYPE html>
+<html lang="de" >
+  <head>
+    <title>Ads</title>
+  </head>
+  <body>
+{{ range . }}
+     <h2 class="text-module-begin">
+        <a class="ellipsis"
+           href="/s-anzeige/{{ .Slug }}/{{ .ID }}">{{ .Title }}</a>
+     </h2>
+{{ end }}
+  </body>
+</html>
+`
+
+// an actual ad listing, aka:
+// https://www.kleinanzeigen.de/s-anzeige/ad-text-slug/1010101010
+// Note, that this HTML code is reduced to the max, so that it only
+// contains the stuff required to satisfy goquery
+const ADTPL string = `DOCTYPE html>
+<html lang="de">
+  <head>
+    <title>Ad Listing</title>
+  </head>
+  <body>
+
+    <div class="l-container-row">
+        <div id="vap-brdcrmb" class="breadcrump">
+            <a class="breadcrump-link" itemprop="url" href="/" title="Kleinanzeigen ">
+                <span itemprop="title">Kleinanzeigen </span>
+            </a>
+            <a class="breadcrump-link" itemprop="url" href="/egal">
+               <span itemprop="title">{{ .Category }}</span></a>
+            </div>
+    </div>
+
+    {{ range $image := .Images }}
+    <div class="galleryimage-element" data-ix="3">
+      <img src="{{ $image }}"/>
+    </div>
+    {{ end }}
+
+    <h1 id="viewad-title" class="boxedarticle--title" itemprop="name" data-soldlabel="Verkauft">
+      {{ .Title }}</h1>
+    <div class="boxedarticle--flex--container">
+      <h2 class="boxedarticle--price" id="viewad-price">
+        {{ .Price }}</h2>
+    </div>
+
+    <div id="viewad-extra-info" class="boxedarticle--details--full">
+      <div><i class="icon icon-small icon-calendar-gray-simple"></i><span>{{ .Created }}</span></div>
+    </div>
+
+    <div class="splitlinebox l-container-row" id="viewad-details">
+      <ul class="addetailslist">
+        <li class="addetailslist--detail">
+          Zustand<span class="addetailslist--detail--value" >
+          {{ .Condition }}</span>
+        </li>
+      </ul>
+    </div>
+
+    <div class="l-container last-paragraph-no-margin-bottom">
+      <p id="viewad-description-text" class="text-force-linebreak " itemprop="description">
+        {{ .Text }}
+      </p>
+    </div>
+  </body>
+</html>
+`
+
+const EMPTYPAGE string = `DOCTYPE html>
+<html lang="de">
+  <head></head>
+  <body></body>
+</html>
+`
+
+const (
+	EMPTYURI       string = `https://www.kleinanzeigen.de/s-anzeige/empty/1`
+	INVALID503URI  string = `https://www.kleinanzeigen.de/s-anzeige/503/1`
+	INVALIDPATHURI string = `https://www.kleinanzeigen.de/anzeige/name/1`
+	INVALID404URI  string = `https://www.kleinanzeigen.de/anzeige/name/1/foo/bar`
+	INVALIDURI     string = `https://foo.bar/weird/things`
+)
+
+var base = "kleingebaeck -c t/config-empty.conf"
+
+type Tests struct {
+	name     string
+	args     string
+	expect   string
+	exitcode int
+}
+
+var tests = []Tests{
+	{
+		name:     "version",
+		args:     base + " -V",
+		expect:   "This is",
+		exitcode: 0,
+	},
+	{
+		name:     "help",
+		args:     base + " -h",
+		expect:   "Usage:",
+		exitcode: 0,
+	},
+	{
+		name:     "debug",
+		args:     base + " -d",
+		expect:   "error: invalid or no user id or no ad link specified",
+		exitcode: 1,
+	},
+	{
+		name:     "debug-check-programinfo",
+		args:     base + " -d",
+		expect:   "pid:",
+		exitcode: 1,
+	},
+	{
+		name:     "no-args-no-user",
+		args:     base,
+		expect:   "invalid or no user id",
+		exitcode: 1,
+	},
+	{
+		name:     "download-single-ad",
+		args:     base + " -o t/out https://www.kleinanzeigen.de/s-anzeige/first-ad/1",
+		expect:   "Successfully downloaded 1 ad with 2 images to t/out",
+		exitcode: 0,
+	},
+	{
+		name:     "download-single-ad-verbose",
+		args:     base + " -o t/out https://www.kleinanzeigen.de/s-anzeige/first-ad/1 -v",
+		expect:   "wrote ad listing",
+		exitcode: 0,
+	},
+	{
+		name:     "download-single-ad-debug",
+		args:     base + " -o t/out https://www.kleinanzeigen.de/s-anzeige/first-ad/1 -d",
+		expect:   "DEBUG: extracted ad listing",
+		exitcode: 0,
+	},
+	{
+		name:     "download-all-ads",
+		args:     base + " -o t/out -u 1",
+		expect:   "Successfully downloaded 7 ads with 16 images to t/out",
+		exitcode: 0,
+	},
+	{
+		name:     "download-all-ads-using-config",
+		args:     "kleingebaeck -c t/fullconfig.conf",
+		expect:   "Successfully downloaded 7 ads with 16 images to t/out",
+		exitcode: 0,
+	},
+}
+
+var invalidtests = []Tests{
+	{
+		name:     "empty-ad",
+		args:     base + " " + EMPTYURI,
+		expect:   "could not extract ad data from page, got empty struct",
+		exitcode: 1,
+	},
+	{
+		name:     "invalid-ad",
+		args:     base + " " + INVALIDURI,
+		expect:   "invalid uri",
+		exitcode: 1,
+	},
+	{
+		name:     "invalid-path",
+		args:     base + " " + INVALIDPATHURI,
+		expect:   "could not extract ad data from page, got empty struct",
+		exitcode: 1,
+	},
+	{
+		name:     "404",
+		args:     base + " " + INVALID404URI,
+		expect:   "could not get page via HTTP",
+		exitcode: 1,
+	},
+	{
+		name:     "outdir-no-exists",
+		args:     base + " -o t/foo/bar/out https://www.kleinanzeigen.de/s-anzeige/first-ad/1 -v",
+		expect:   "Failure",
+		exitcode: 1,
+	},
+	{
+		name:     "wrong-flag",
+		args:     base + " -X",
+		expect:   "unknown shorthand flag: 'X' in -X",
+		exitcode: 1,
+	},
+	{
+		name:     "no-config",
+		args:     "kleingebaeck -c t/invalid.conf",
+		expect:   "error loading config file",
+		exitcode: 1,
+	},
+	{
+		name:     "503",
+		args:     base + " " + INVALID503URI,
+		expect:   "could not get page via HTTP",
+		exitcode: 1,
+	},
+}
+
+type AdConfig struct {
+	Title     string
+	Slug      string
+	ID        string
+	Price     string
+	Category  string
+	Condition string
+	Created   string
+	Text      string
+	Images    []string // files in ./t/
+}
+
+var adsrc = []AdConfig{
+	{
+		Title: "First Ad",
+		ID:    "1", Price: "5€",
+		Category:  "Klimbim",
+		Text:      "Thing to sale",
+		Slug:      "first-ad",
+		Condition: "works",
+		Created:   "Yesterday",
+		Images:    []string{"t/1.jpg", "t/2.jpg"},
+	},
+	{
+		Title: "Secnd Ad",
+		ID:    "2", Price: "5€",
+		Category:  "Kram",
+		Text:      "Thing to sale",
+		Slug:      "second-ad",
+		Condition: "works",
+		Created:   "Yesterday",
+		Images:    []string{"t/1.jpg", "t/2.jpg"},
+	},
+	{
+		Title:     "Third Ad",
+		ID:        "3",
+		Price:     "5€",
+		Category:  "Kuddelmuddel",
+		Text:      "Thing to sale",
+		Slug:      "third-ad",
+		Condition: "works",
+		Created:   "Yesterday",
+		Images:    []string{"t/1.jpg", "t/2.jpg"},
+	},
+	{
+		Title:     "Forth Ad",
+		ID:        "4",
+		Price:     "5€",
+		Category:  "Krempel",
+		Text:      "Thing to sale",
+		Slug:      "fourth-ad",
+		Condition: "works",
+		Created:   "Yesterday",
+		Images:    []string{"t/1.jpg", "t/2.jpg"},
+	},
+	{
+		Title:     "Fifth Ad",
+		ID:        "5",
+		Price:     "5€",
+		Category:  "Kladderadatsch",
+		Text:      "Thing to sale",
+		Slug:      "fifth-ad",
+		Condition: "works",
+		Created:   "Yesterday",
+		Images:    []string{"t/1.jpg", "t/2.jpg"},
+	},
+	{
+		Title:     "Sixth Ad",
+		ID:        "6",
+		Price:     "5€",
+		Category:  "Klunker",
+		Text:      "Thing to sale",
+		Slug:      "sixth-ad",
+		Condition: "works",
+		Created:   "Yesterday",
+		Images:    []string{"t/1.jpg", "t/2.jpg"},
+	},
+	{
+		Title:     "Ad with multiple img formats",
+		ID:        "7",
+		Price:     "5€",
+		Category:  "Klunker",
+		Text:      "Thing to sale",
+		Slug:      "seventh-ad",
+		Condition: "works",
+		Created:   "Yesterday",
+		Images:    []string{"t/1.png", "t/1.gif", "t/1.webp", "t/1.jpg"},
+	},
+}
+
+// An  Adsource  is used  to  construct  a  httpmock responder  for  a
+// particular    url.    So,     the    code    (scrape.go)    scrapes
+// https://kleinanzeigen.de,  but  in  reality httpmock  captures  the
+// request and responds with our mock data
+type Adsource struct {
+	uri     string
+	content string
+	status  int
+}
+
+// Render a HTML template for an adlisting or an ad
+func GetTemplate(adconfigs []AdConfig, adconfig *AdConfig, htmltemplate string) string {
+	tmpl, err := tpl.New("template").Parse(htmltemplate)
+	if err != nil {
+		panic(err)
+	}
+
+	var out bytes.Buffer
+	if adconfig.ID == "" {
+		err = tmpl.Execute(&out, adconfigs)
+	} else {
+		err = tmpl.Execute(&out, adconfig)
+	}
+
+	if err != nil {
+		panic(err)
+	}
+
+	return out.String()
+}
+
+// Initialize the valid sources for the httpmock responder
+func InitValidSources() []Adsource {
+	// valid ad listing page 1
+	list1 := []AdConfig{
+		adsrc[0], adsrc[1], adsrc[2],
+	}
+
+	// valid ad listing page 2
+	list2 := []AdConfig{
+		adsrc[3], adsrc[4], adsrc[5], adsrc[6],
+	}
+
+	// valid ad listing page 3, which is empty
+	list3 := []AdConfig{}
+
+	// used to signal GetTemplate() to render a listing
+	empty := AdConfig{}
+
+	// prepare urls for the listing pages
+	ads := []Adsource{
+		{
+			uri:     fmt.Sprintf("%s%s?userId=1", Baseuri, Listuri),
+			content: GetTemplate(list1, &empty, LISTTPL),
+		},
+		{
+			uri:     fmt.Sprintf("%s%s?userId=1&pageNum=2", Baseuri, Listuri),
+			content: GetTemplate(list2, &empty, LISTTPL),
+		},
+		{
+			uri:     fmt.Sprintf("%s%s?userId=1&pageNum=3", Baseuri, Listuri),
+			content: GetTemplate(list3, &empty, LISTTPL),
+		},
+	}
+
+	// prepare urls for the ads
+	for _, ad := range adsrc {
+		ads = append(ads, Adsource{
+			uri:     fmt.Sprintf("%s/s-anzeige/%s/%s", Baseuri, ad.Slug, ad.ID),
+			content: GetTemplate(nil, &ad, ADTPL),
+		})
+	}
+
+	return ads
+}
+
+func InitInvalidSources() []Adsource {
+	empty := AdConfig{}
+	ads := []Adsource{
+		{
+			// valid ad page but without content
+			uri:     fmt.Sprintf("%s/s-anzeige/empty/1", Baseuri),
+			content: GetTemplate(nil, &empty, EMPTYPAGE),
+		},
+		{
+			// some random foreign webpage
+			uri:     INVALIDURI,
+			content: GetTemplate(nil, &empty, "<html>foo</html>"),
+		},
+		{
+			// some invalid page path
+			uri:     fmt.Sprintf("%s/anzeige/name/1", Baseuri),
+			content: GetTemplate(nil, &empty, "<html></html>"),
+		},
+		{
+			// some none-ad page
+			uri:     fmt.Sprintf("%s/anzeige/name/1/foo/bar", Baseuri),
+			content: GetTemplate(nil, &empty, "<html>HTTP 404: /eine-anzeige/ does not exist!</html>"),
+			status:  404,
+		},
+		{
+			// valid ad page but 503
+			uri:     fmt.Sprintf("%s/s-anzeige/503/1", Baseuri),
+			content: GetTemplate(nil, &empty, "<html>HTTP 503: service unavailable</html>"),
+			status:  503,
+		},
+	}
+
+	return ads
+}
+
+// load a test image from disk
+func GetImage(path string) []byte {
+	dat, err := os.ReadFile(path)
+	if err != nil {
+		panic(err)
+	}
+
+	return dat
+}
+
+// setup httpmock
+func SetIntercept(ads []Adsource) {
+	headers := http.Header{}
+	headers.Add("Set-Cookie", "session=permanent")
+
+	for _, advertisement := range ads {
+		if advertisement.status == 0 {
+			advertisement.status = 200
+		}
+
+		httpmock.RegisterResponder("GET", advertisement.uri,
+			httpmock.NewStringResponder(advertisement.status, advertisement.content).HeaderAdd(headers))
+	}
+
+	// we just use 2 images, put this here
+	for _, image := range []string{"t/1.jpg", "t/2.jpg", "t/1.png", "t/1.gif", "t/1.webp"} {
+		httpmock.RegisterResponder("GET", image,
+			httpmock.NewBytesResponder(200, GetImage(image)).HeaderAdd(headers))
+	}
+}
+
+func VerifyAd(advertisement *AdConfig) error {
+	body := advertisement.Title + advertisement.Price + advertisement.ID + "Kleinanzeigen => " +
+		advertisement.Category + advertisement.Condition + advertisement.Created
+
+	// prepare ad dir name using DefaultAdNameTemplate
+	c := Config{Adnametemplate: "{{ .Slug }}"}
+	adstruct := Ad{Slug: advertisement.Slug, ID: advertisement.ID}
+
+	addir, err := AdDirName(&c, &adstruct)
+	if err != nil {
+		return err
+	}
+
+	file := fmt.Sprintf("t/out/%s/Adlisting.txt", addir)
+
+	content, err := os.ReadFile(file)
+	if err != nil {
+		return fmt.Errorf("unable to read adlisting file: %w", err)
+	}
+
+	if body != strings.TrimSpace(string(content)) {
+		msg := fmt.Sprintf("ad content doesn't match.\nExpect: %s\n   Got: %s\n", body, content)
+
+		return errors.New(msg)
+	}
+
+	return nil
+}
+
+func TestMain(t *testing.T) {
+	oldargs := os.Args
+	defer func() { os.Args = oldargs }()
+
+	httpmock.Activate()
+	defer httpmock.DeactivateAndReset()
+
+	// prepare httpmock responders
+	SetIntercept(InitValidSources())
+
+	// run commandline tests
+	for _, test := range tests {
+		var buf bytes.Buffer
+
+		os.Args = strings.Split(test.args, " ")
+
+		ret := Main(&buf)
+
+		if ret != test.exitcode {
+			t.Errorf("%s with cmd <%s> did not exit with %d but %d",
+				test.name, test.args, test.exitcode, ret)
+		}
+
+		if !strings.Contains(buf.String(), test.expect) {
+			t.Errorf("%s with cmd <%s> output did not match.\nExpect: %s\n   Got: %s\n",
+				test.name, test.args, test.expect, buf.String())
+		}
+	}
+
+	// verify if downloaded ads match
+	for _, ad := range adsrc {
+		if err := VerifyAd(&ad); err != nil {
+			t.Error(err.Error())
+		}
+	}
+}
+
+func TestMainInvalids(t *testing.T) {
+	oldargs := os.Args
+	defer func() { os.Args = oldargs }()
+
+	httpmock.Activate()
+	defer httpmock.DeactivateAndReset()
+
+	// prepare httpmock responders
+	SetIntercept(InitInvalidSources())
+
+	// run commandline tests
+	for _, test := range invalidtests {
+		var buf bytes.Buffer
+
+		os.Args = strings.Split(test.args, " ")
+
+		ret := Main(&buf)
+
+		if ret != test.exitcode {
+			t.Errorf("%s with cmd <%s> did not exit with %d but %d",
+				test.name, test.args, test.exitcode, ret)
+		}
+
+		if !strings.Contains(buf.String(), test.expect) {
+			t.Errorf("%s with cmd <%s> output did not match.\nExpect: %s\n   Got: %s\n",
+				test.name, test.args, test.expect, buf.String())
+		}
+	}
+}

mkrel.sh

@@ -22,7 +22,12 @@ freebsd/amd64
 linux/amd64
 netbsd/amd64
 openbsd/amd64
-windows/amd64"
+windows/amd64
+freebsd/arm64
+linux/arm64
+netbsd/arm64
+openbsd/arm64
+windows/arm64"
 
 tool="$1"
 version="$2"

scrape.go

@@ -1,5 +1,5 @@
 /*
-Copyright © 2023 Thomas von Dein
+Copyright © 2023-2024 Thomas von Dein
 
 This program is free software: you can redistribute it and/or modify
 it under the terms of the GNU General Public License as published by
@@ -18,81 +18,35 @@ along with this program. If not, see <http://www.gnu.org/licenses/>.
 package main
 
 import (
-	"errors"
+	"bytes"
 	"fmt"
-	"io"
 	"log/slog"
-	"net/http"
 	"path/filepath"
+	"strconv"
 	"strings"
+	"time"
 
 	"astuart.co/goq"
 	"golang.org/x/sync/errgroup"
 )
 
-type Index struct {
-	Links []string `goquery:".text-module-begin a,[href]"`
-}
-
-type Ad struct {
-	Title     string `goquery:"h1"`
-	Slug      string
-	Id        string
-	Condition string
-	Category  string
-	Price     string   `goquery:"h2#viewad-price"`
-	Created   string   `goquery:"#viewad-extra-info,text"`
-	Text      string   `goquery:"p#viewad-description-text,html"`
-	Images    []string `goquery:".galleryimage-element img,[src]"`
-	Meta      []string `goquery:".addetailslist--detail--value,text"`
-}
-
-func (ad *Ad) LogValue() slog.Value {
-	return slog.GroupValue(
-		slog.String("title", ad.Title),
-		slog.String("price", ad.Price),
-		slog.String("id", ad.Id),
-		slog.Int("imagecount", len(ad.Images)),
-		slog.Int("bodysize", len(ad.Text)),
-	)
-}
-
-// fetch some web page content
-func Get(uri string, client *http.Client) (io.ReadCloser, error) {
-	req, err := http.NewRequest("GET", uri, nil)
-	if err != nil {
-		return nil, err
-	}
-
-	req.Header.Set("User-Agent", Useragent)
-
-	res, err := client.Do(req)
-	if err != nil {
-		return nil, err
-	}
-
-	slog.Debug("response", "code", res.StatusCode, "status",
-		res.Status, "size", res.ContentLength)
-
-	return res.Body, nil
-}
-
 // extract links from  all ad listing pages (that  is: use pagination)
 // and scrape every page
-func Start(conf *Config) error {
-	client := &http.Client{}
+func ScrapeUser(fetch *Fetcher) error {
 	adlinks := []string{}
 
-	baseuri := fmt.Sprintf("%s%s?userId=%d", Baseuri, Listuri, conf.User)
+	baseuri := fmt.Sprintf("%s%s?userId=%d", Baseuri, Listuri, fetch.Config.User)
 	page := 1
 	uri := baseuri
 
-	slog.Info("fetching ad pages", "user", conf.User)
+	slog.Info("fetching ad pages", "user", fetch.Config.User)
 
 	for {
 		var index Index
+
 		slog.Debug("fetching page", "uri", uri)
-		body, err := Get(uri, client)
+
+		body, err := fetch.Get(uri)
 		if err != nil {
 			return err
 		}
@@ -100,7 +54,7 @@ func Start(conf *Config) error {
 
 		err = goq.NewDecoder(body).Decode(&index)
 		if err != nil {
-			return err
+			return fmt.Errorf("failed to goquery decode HTML index body: %w", err)
 		}
 
 		if len(index.Links) == 0 {
@@ -115,16 +69,16 @@ func Start(conf *Config) error {
 		}
 
 		page++
-		uri = baseuri + "&pageNum=" + fmt.Sprintf("%d", page)
+		uri = baseuri + "&pageNum=" + strconv.Itoa(page)
 	}
 
-	for i, adlink := range adlinks {
-		err := Scrape(conf, Baseuri+adlink)
+	for index, adlink := range adlinks {
+		err := ScrapeAd(fetch, Baseuri+adlink)
 		if err != nil {
 			return err
 		}
 
-		if conf.Limit > 0 && i == conf.Limit-1 {
+		if fetch.Config.Limit > 0 && index == fetch.Config.Limit-1 {
 			break
 		}
 	}
@@ -133,94 +87,153 @@ func Start(conf *Config) error {
 }
 
 // scrape an ad. uri is the full uri of the ad, dir is the basedir
-func Scrape(c *Config, uri string) error {
-	client := &http.Client{}
-	ad := &Ad{}
+func ScrapeAd(fetch *Fetcher, uri string) error {
+	advertisement := &Ad{}
 
 	// extract slug and id from uri
 	uriparts := strings.Split(uri, "/")
-	if len(uriparts) < 6 {
-		return errors.New("invalid uri")
+	if len(uriparts) < SlugURIPartNum {
+		return fmt.Errorf("invalid uri: %s", uri)
 	}
-	ad.Slug = uriparts[4]
-	ad.Id = uriparts[5]
+
+	advertisement.Slug = uriparts[4]
+	advertisement.ID = uriparts[5]
 
 	// get the ad
 	slog.Debug("fetching ad page", "uri", uri)
-	body, err := Get(uri, client)
+
+	body, err := fetch.Get(uri)
 	if err != nil {
 		return err
 	}
 	defer body.Close()
 
 	// extract ad contents with goquery/goq
-	err = goq.NewDecoder(body).Decode(&ad)
+	err = goq.NewDecoder(body).Decode(&advertisement)
+	if err != nil {
+		return fmt.Errorf("failed to goquery decode HTML ad body: %w", err)
+	}
+
+	if len(advertisement.CategoryTree) > 0 {
+		advertisement.Category = strings.Join(advertisement.CategoryTree, " => ")
+	}
+
+	if advertisement.Incomplete() {
+		slog.Debug("got ad", "ad", advertisement)
+
+		return fmt.Errorf("could not extract ad data from page, got empty struct")
+	}
+
+	advertisement.CalculateExpire()
+
+	// prepare ad dir name
+	addir, err := AdDirName(fetch.Config, advertisement)
 	if err != nil {
 		return err
 	}
-	if len(ad.Meta) == 2 {
-		ad.Category = ad.Meta[0]
-		ad.Condition = ad.Meta[1]
+
+	proceed := CheckAdVisited(fetch.Config, addir)
+	if !proceed {
+		return nil
 	}
-	slog.Debug("extracted ad listing", "ad", ad)
 
 	// write listing
-	err = WriteAd(c.Outdir, ad, c.Template)
+	err = WriteAd(fetch.Config, advertisement, addir)
 	if err != nil {
 		return err
 	}
 
-	c.IncrAds()
+	// tell the user
+	slog.Debug("extracted ad listing", "ad", advertisement)
 
-	return ScrapeImages(c, ad)
+	// stats
+	fetch.Config.IncrAds()
+
+	// register for later checks
+	DirsVisited[addir] = 1
+
+	return ScrapeImages(fetch, advertisement, addir)
 }
 
-func ScrapeImages(c *Config, ad *Ad) error {
+func ScrapeImages(fetch *Fetcher, advertisement *Ad, addir string) error {
 	// fetch images
 	img := 1
-	g := new(errgroup.Group)
+	adpath := filepath.Join(fetch.Config.Outdir, addir)
 
-	for _, imguri := range ad.Images {
-		imguri := imguri
-		file := filepath.Join(c.Outdir, ad.Slug, fmt.Sprintf("%d.jpg", img))
-		g.Go(func() error {
-			err := Getimage(imguri, file)
+	// scan existing images, if any
+	cache, err := ReadImages(adpath, fetch.Config.ForceDownload)
 	if err != nil {
 		return err
 	}
-			slog.Info("wrote ad image", "image", file)
+
+	egroup := new(errgroup.Group)
+
+	for _, imguri := range advertisement.Images {
+		imguri := imguri
+
+		// we append the suffix later in NewImage() based on image format
+		basefilename := filepath.Join(adpath, fmt.Sprintf("%d", img))
+
+		egroup.Go(func() error {
+			// wait a little
+
+			throttle := GetThrottleTime()
+			time.Sleep(throttle)
+
+			body, err := fetch.Getimage(imguri)
+			if err != nil {
+				return err
+			}
+
+			buf := new(bytes.Buffer)
+
+			_, err = buf.ReadFrom(body)
+			if err != nil {
+				return fmt.Errorf("failed to read from image buffer: %w", err)
+			}
+
+			reader := bytes.NewReader(buf.Bytes())
+
+			image, err := NewImage(reader, basefilename, imguri)
+			if err != nil {
+				return err
+			}
+
+			err = image.CalcHash()
+			if err != nil {
+				return err
+			}
+
+			if !fetch.Config.ForceDownload {
+				if image.SimilarExists(cache) {
+					slog.Debug("similar image exists, not written", "uri", image.URI)
+
+					return nil
+				}
+			}
+
+			_, err = reader.Seek(0, 0)
+			if err != nil {
+				return fmt.Errorf("failed to seek(0) on image reader: %w", err)
+			}
+
+			err = WriteImage(image.Filename, reader)
+			if err != nil {
+				return err
+			}
+
+			slog.Debug("wrote image", "image", image, "size", buf.Len(), "throttle", throttle)
 
 			return nil
 		})
 		img++
 	}
 
-	if err := g.Wait(); err != nil {
-		return err
+	if err := egroup.Wait(); err != nil {
+		return fmt.Errorf("failed to finalize error waitgroup: %w", err)
 	}
 
-	c.IncrImgs(len(ad.Images))
-
-	return nil
-}
-
-// fetch an image
-func Getimage(uri, fileName string) error {
-	slog.Debug("fetching ad image", "uri", uri)
-	response, err := http.Get(uri)
-	if err != nil {
-		return err
-	}
-	defer response.Body.Close()
-
-	if response.StatusCode != 200 {
-		return errors.New("received non 200 response code")
-	}
-
-	err = WriteImage(fileName, response.Body)
-	if err != nil {
-		return err
-	}
+	fetch.Config.IncrImgs(len(advertisement.Images))
 
 	return nil
 }

store.go

@@ -1,5 +1,5 @@
 /*
-Copyright © 2023 Thomas von Dein
+Copyright © 2023-2024 Thomas von Dein
 
 This program is free software: you can redistribute it and/or modify
 it under the terms of the GNU General Public License as published by
@@ -18,18 +18,64 @@ along with this program. If not, see <http://www.gnu.org/licenses/>.
 package main
 
 import (
-	"io"
+	"bytes"
+	"fmt"
 	"log/slog"
 	"os"
 	"path/filepath"
 	"runtime"
 	"strings"
 	tpl "text/template"
+	"time"
 )
 
-func WriteAd(dir string, ad *Ad, template string) error {
+type OutdirData struct {
+	Year, Day, Month string
+}
+
+func OutDirName(conf *Config) (string, error) {
+	tmpl, err := tpl.New("outdir").Parse(conf.Outdir)
+	if err != nil {
+		return "", fmt.Errorf("failed to parse outdir template: %w", err)
+	}
+
+	buf := bytes.Buffer{}
+
+	now := time.Now()
+	data := OutdirData{
+		Year:  now.Format("2006"),
+		Month: now.Format("02"),
+		Day:   now.Format("01"),
+	}
+
+	err = tmpl.Execute(&buf, data)
+	if err != nil {
+		return "", fmt.Errorf("failed to execute outdir template: %w", err)
+	}
+
+	return buf.String(), nil
+}
+
+func AdDirName(conf *Config, advertisement *Ad) (string, error) {
+	tmpl, err := tpl.New("adname").Parse(conf.Adnametemplate)
+	if err != nil {
+		return "", fmt.Errorf("failed to parse adname template: %w", err)
+	}
+
+	buf := bytes.Buffer{}
+
+	err = tmpl.Execute(&buf, advertisement)
+	if err != nil {
+		return "", fmt.Errorf("failed to execute adname template: %w", err)
+	}
+
+	return buf.String(), nil
+}
+
+func WriteAd(conf *Config, advertisement *Ad, addir string) error {
 	// prepare output dir
-	dir = filepath.Join(dir, ad.Slug)
+	dir := filepath.Join(conf.Outdir, addir)
+
 	err := Mkdir(dir)
 	if err != nil {
 		return err
@@ -37,24 +83,27 @@ func WriteAd(dir string, ad *Ad, template string) error {
 
 	// write ad file
 	listingfile := filepath.Join(dir, "Adlisting.txt")
-	f, err := os.Create(listingfile)
-	if err != nil {
-		return err
-	}
 
-	if runtime.GOOS == "windows" {
-		ad.Text = strings.ReplaceAll(ad.Text, "<br/>", "\r\n")
+	listingfd, err := os.Create(listingfile)
+	if err != nil {
+		return fmt.Errorf("failed to create Adlisting.txt: %w", err)
+	}
+	defer listingfd.Close()
+
+	if runtime.GOOS == WIN {
+		advertisement.Text = strings.ReplaceAll(advertisement.Text, "<br/>", "\r\n")
 	} else {
-		ad.Text = strings.ReplaceAll(ad.Text, "<br/>", "\n")
+		advertisement.Text = strings.ReplaceAll(advertisement.Text, "<br/>", "\n")
 	}
 
-	tmpl, err := tpl.New("adlisting").Parse(template)
+	tmpl, err := tpl.New("adlisting").Parse(conf.Template)
 	if err != nil {
-		return err
+		return fmt.Errorf("failed to parse adlisting template: %w", err)
 	}
-	err = tmpl.Execute(f, ad)
+
+	err = tmpl.Execute(listingfd, advertisement)
 	if err != nil {
-		return err
+		return fmt.Errorf("failed to execute adlisting template: %w", err)
 	}
 
 	slog.Info("wrote ad listing", "listingfile", listingfile)
@@ -62,17 +111,67 @@ func WriteAd(dir string, ad *Ad, template string) error {
 	return nil
 }
 
-func WriteImage(filename string, reader io.ReadCloser) error {
+func WriteImage(filename string, reader *bytes.Reader) error {
 	file, err := os.Create(filename)
 	if err != nil {
-		return err
+		return fmt.Errorf("failed to open image file: %w", err)
 	}
 	defer file.Close()
 
-	_, err = io.Copy(file, reader)
+	_, err = reader.WriteTo(file)
+
 	if err != nil {
-		return err
+		return fmt.Errorf("failed to write to image file: %w", err)
 	}
 
 	return nil
 }
+
+func ReadImage(filename string) (*bytes.Buffer, error) {
+	var buf bytes.Buffer
+
+	if !fileExists(filename) {
+		return nil, fmt.Errorf("image %s does not exist", filename)
+	}
+
+	data, err := os.ReadFile(filename)
+	if err != nil {
+		return nil, fmt.Errorf("failed to read image file: %w", err)
+	}
+
+	_, err = buf.Write(data)
+	if err != nil {
+		return nil, fmt.Errorf("failed to write image into buffer: %w", err)
+	}
+
+	return &buf, nil
+}
+
+func fileExists(filename string) bool {
+	info, err := os.Stat(filename)
+
+	if err != nil {
+		// return false on any error
+		return false
+	}
+
+	return !info.IsDir()
+}
+
+// check if  an addir has  already been  processed by current  run and
+// decide what to do
+func CheckAdVisited(conf *Config, adname string) bool {
+	if Exists(DirsVisited, adname) {
+		if conf.ForceDownload {
+			slog.Warn("an ad with the same name has already been downloaded, overwriting", "addir", adname)
+			return true
+		}
+
+		// don't overwrite
+		slog.Warn("an ad with the same name has already been downloaded, skipping (use -f to overwrite)", "addir", adname)
+		return false
+	}
+
+	// overwrite
+	return true
+}

store_test.go

@@ -0,0 +1,39 @@
+/*
+Copyright © 2023-2024 Thomas von Dein
+
+This program is free software: you can redistribute it and/or modify
+it under the terms of the GNU General Public License as published by
+the Free Software Foundation, either version 3 of the License, or
+(at your option) any later version.
+
+This program is distributed in the hope that it will be useful,
+but WITHOUT ANY WARRANTY; without even the implied warranty of
+MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+GNU General Public License for more details.
+
+You should have received a copy of the GNU General Public License
+along with this program. If not, see <http://www.gnu.org/licenses/>.
+*/
+
+package main
+
+import (
+	"bytes"
+	"testing"
+)
+
+// this is  a weird thing.  WriteImage() is being called  in scrape.go
+// which is  being tested by  TestMain() in main_test.go.  However, it
+// doesn't  show up  in the  coverage report  for unknown  reasons, so
+// here's a single test for it
+func TestWriteImage(t *testing.T) {
+	t.Parallel()
+
+	reader := bytes.NewReader([]byte{1, 2, 3, 4, 5, 6, 7, 8})
+	file := "t/out/t.jpg"
+
+	err := WriteImage(file, reader)
+	if err != nil {
+		t.Errorf("Could not write mock image to %s: %s", file, err.Error())
+	}
+}

t/config-empty.conf

@@ -0,0 +1,6 @@
+# empty config for Main() unit tests to force unit tests NOT to use an
+# eventually existing ~/.kleingebaeck!
+template="""
+{{.Title}}{{.Price}}{{.ID}}{{.Category}}{{.Condition}}{{.Created}}
+"""
+

t/fullconfig.conf

@@ -0,0 +1,6 @@
+user = 1
+loglevel = "verbose"
+outdir = "t/out"
+template="""
+{{.Title}}{{.Price}}{{.ID}}{{.Category}}{{.Condition}}{{.Created}}
+"""

t/httproot/README.md

@@ -0,0 +1,13 @@
+# Mock http server
+
+Install ehfs from https://github.com/mjpclab/extra-http-file-server/.
+
+Install p2cli from https://github.com/wrouesnel/p2cli.
+
+Run `templates/render.sh` to build the file structure.
+
+Run `server.sh` to start the http server.
+
+To scrape an ad from it, use such a URL:
+
+http://localhost:8080/s-anzeige/first-ad/111-11-111

t/httproot/serve.sh

@@ -0,0 +1,4 @@
+#!/bin/sh
+ehfs -a :/s-anzeige:./kleinanzeigen \
+     -a :/api/v1/prod-ads/images/fc:./img \
+     -l localhost:8080 -I index.html

t/httproot/templates/ad.tpl

@@ -0,0 +1,50 @@
+<!DOCTYPE html>
+<html lang="de">
+  <head>
+    <title>Ad Listing</title>
+  </head>
+  <body>
+
+    <div class="l-container-row">
+        <div id="vap-brdcrmb" class="breadcrump">
+            <a class="breadcrump-link" itemprop="url" href="/" title="Kleinanzeigen ">
+                <span itemprop="title">Kleinanzeigen </span>
+            </a>
+            <a class="breadcrump-link" itemprop="url" href="/egal">
+               <span itemprop="title">{{ category }}</span></a>
+            </div>
+    </div>
+
+    {% for image in images %}
+    <div class="galleryimage-element" data-ix="3">
+      <img src="http://localhost:8080/api/v1/prod-ads/images/fc/{{ image.id }}?rule=$_59.JPG"/>
+    </div>
+    {% endfor %}
+
+    <h1 id="viewad-title" class="boxedarticle--title" itemprop="name" data-soldlabel="Verkauft">
+      {{ title }}</h1>
+    <div class="boxedarticle--flex--container">
+      <h2 class="boxedarticle--price" id="viewad-price">
+        {{ price }}</h2>
+    </div>
+
+    <div id="viewad-extra-info" class="boxedarticle--details--full">
+      <div><i class="icon icon-small icon-calendar-gray-simple"></i><span>{{ created }}</span></div>
+    </div>
+
+    <div class="splitlinebox l-container-row" id="viewad-details">
+      <ul class="addetailslist">
+        <li class="addetailslist--detail">
+          Zustand<span class="addetailslist--detail--value" >
+          {{ condition }}</span>
+        </li>
+      </ul>
+    </div>
+
+    <div class="l-container last-paragraph-no-margin-bottom">
+      <p id="viewad-description-text" class="text-force-linebreak " itemprop="description">
+        {{ text }}
+      </p>
+    </div>
+  </body>
+</html>

t/httproot/templates/index.tpl

@@ -0,0 +1,15 @@
+<!DOCTYPE html>
+<html lang="de" >
+  <head>
+    <title>Ads</title>
+  </head>
+  <body>
+    {% for ad in ads %}
+     <h2 class="text-module-begin">
+        <a class="ellipsis"
+           href="/s-anzeige/{{ ad.slug }}/{{ ad.id }}">{{ ad.title }}</a>
+     </h2>
+    {% endfor %}
+  </body>
+</html>
+

t/httproot/templates/render.sh

@@ -0,0 +1,15 @@
+#!/bin/sh -x
+base="../kleinanzeigen"
+
+rm -rf $base
+mkdir -p $base
+
+echo "Generating /s-bestandsliste.html"
+p2cli -t index.tpl -i vars.yaml > $base/s-bestandsliste.html
+
+for idx in 0 1; do
+    slug=$(cat vars.yaml | yq ".ads[$idx].slug")
+    id=$(cat vars.yaml | yq ".ads[$idx].id")
+    mkdir -p $base/$slug/$id
+    cat vars.yaml | yq ".ads[$idx]" | p2cli -t ad.tpl -f yaml > $base/$slug/$id/index.html
+done

t/httproot/templates/vars.yaml

@@ -0,0 +1,27 @@
+ads:
+  - slug: first-ad
+    id: 111-11-111
+    title: First Ad
+    price: "19 €"
+    condition: "Sehr gut"
+    category: "Weitere Elektronik"
+    created: 21.12.2023
+    images:
+      - id: fcf6d664-5258-42c2-bf58-d1b8e9221574
+      - id: fcf6d664-5258-42c2-bf58-as43as5d43as
+    text: |
+      Zu Verkaufen.
+      Zahlung nur Paypal.
+  - slug: second-ad
+    id: 222-22-222
+    title: Second Ad
+    price: "200 €"
+    condition: "Sehr gut"
+    category: "Elektronik"
+    created: 21.12.2023
+    images:
+      - id: cdas4sd5-5258-42c2-bf58-d1b8e9221574
+      - id: cdas4sd5-5258-42c2-bf58-as43as5d43as
+    text: |
+      Zu Verkaufen.
+      Zahlung nur Überweisung.

t/invalid.conf

@@ -0,0 +1 @@
+user = "

util.go

@@ -1,5 +1,5 @@
 /*
-Copyright © 2023 Thomas von Dein
+Copyright © 2023-2024 Thomas von Dein
 
 This program is free software: you can redistribute it and/or modify
 it under the terms of the GNU General Public License as published by
@@ -20,18 +20,21 @@ package main
 import (
 	"bytes"
 	"errors"
+	"fmt"
+	"math/rand"
 	"os"
 	"os/exec"
 	"runtime"
+	"time"
 
 	"github.com/mattn/go-isatty"
 )
 
 func Mkdir(dir string) error {
 	if _, err := os.Stat(dir); errors.Is(err, os.ErrNotExist) {
-		err := os.Mkdir(dir, os.ModePerm)
+		err := os.MkdirAll(dir, os.ModePerm)
 		if err != nil {
-			return err
+			return fmt.Errorf("failed to create directory %s: %w", dir, err)
 		}
 	}
 
@@ -42,7 +45,8 @@ func man() error {
 	man := exec.Command("less", "-")
 
 	var b bytes.Buffer
-	b.Write([]byte(manpage))
+
+	b.WriteString(manpage)
 
 	man.Stdout = os.Stdout
 	man.Stdin = &b
@@ -51,7 +55,7 @@ func man() error {
 	err := man.Run()
 
 	if err != nil {
-		return err
+		return fmt.Errorf("failed to execute 'less': %w", err)
 	}
 
 	return nil
@@ -59,10 +63,23 @@ func man() error {
 
 // returns TRUE if stdout is NOT a tty or windows
 func IsNoTty() bool {
-	if runtime.GOOS == "windows" || !isatty.IsTerminal(os.Stdout.Fd()) {
+	if runtime.GOOS == WIN || !isatty.IsTerminal(os.Stdout.Fd()) {
 		return true
 	}
 
 	// it is a tty
 	return false
 }
+
+func GetThrottleTime() time.Duration {
+	return time.Duration(rand.Intn(MaxThrottle-MinThrottle+1)+MinThrottle) * time.Millisecond
+}
+
+// look if a key in a map exists, generic variant
+func Exists[K comparable, V any](m map[K]V, v K) bool {
+	if _, ok := m[v]; ok {
+		return true
+	}
+
+	return false
+}