mirror of
https://codeberg.org/scip/ephemerup.git
synced 2025-12-16 20:20:58 +01:00
46 lines
1.3 KiB
Go
46 lines
1.3 KiB
Go
/*
|
|
Copyright © 2023 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 common
|
|
|
|
import (
|
|
"errors"
|
|
"regexp"
|
|
)
|
|
|
|
/*
|
|
Untaint user input, that is: remove all non supported chars.
|
|
|
|
wanted is a regexp matching chars we shall leave. Everything else
|
|
will be removed. Eg:
|
|
|
|
untainted := Untaint(input, `[^a-zA-Z0-9\-]`)
|
|
|
|
Returns a new string and an error if the input string has been
|
|
modified. It's the callers choice to decide what to do about
|
|
it. You may ignore the error and use the untainted string or bail
|
|
out.
|
|
*/
|
|
func Untaint(input string, wanted *regexp.Regexp) (string, error) {
|
|
untainted := wanted.ReplaceAllString(input, "")
|
|
|
|
if len(untainted) != len(input) {
|
|
return untainted, errors.New("Invalid input string!")
|
|
}
|
|
|
|
return untainted, nil
|
|
}
|