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rattatwinko bd935c62f5 fixes to HTML head

2026-04-22 20:39:59 +02:00

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saningi-html todo

Current:

basic cli argparsing working (stdin -> sanizization -> stdout)
Modes implemented:
- strict
- loose
- passthrough
profiles in a seperate .py file
Ok you see, I am too lazy to write the stuff which I completed here, so i just italizized it.

To implement:

things not yet implemented in the program NOTE: That things which are in italic text are already implemented!

url filtering:

[x] block external URL in strict mode (eg a link with href to some porn site or something)
[x] allow relative paths: - eg "/path/to/my/awesome/post.html"
[x] apply to any of these:
- a
- img
- link href
[x] add custom attribute filter function
[x] load dotenv (chore for profiles.py) ; do this someday when implementing JSON configs. Or dotenv stuff : PRIO:HIGH

Expland strict mode:

[x] Allow these:
- html, head, body
- title
- meta (with restrictions)
- link (for css only)
- table, tr, td, th
- any of crucuial html tags
restrict metas (allow):
- allow only charset, name, content
restrict metas (dont allow):
- base
- meta http-equiv

passthrough safety

[x] add stderr warning for user

Add some logging:

debugging with --debug
print what was removed, to stderr

Config files:

allow custom JSON/YAML/yadayadayada configurations
- pass in through CLI with flag --config "file.idk"

Fixes:

Content of tag staying after removal of tag

When running strict/loose:

(venv) rattatwinko@kubuntu:~/Documents/sanigi-html$ echo "<html><body><h1>Heading</h1><script>var=j;</script></body></html>" | python3 src/main.py --mode strict
[ DEBUG@2026-04-20 07:54:57 ]: called sanitizer! using this as args: 
<html><body><h1>Heading</h1><script>var=j;</script></body></html>
['p', 'b', 'i', 'u', 'em', 'strong', 'ul', 'ol', 'li', 'br', 'hr', 'h1', 'h2', 'h3', 'h4', 'h5', 'h6']
[]
True
<h1>Heading</h1>**var=j;**

You can see that the <script> tag gets removed but doesnt bother with removing the contents of that tag. The remaining thing is : var=j; ; If this gets rendered its bad, cause it looks bad! We need to fix this.

Plan for fixing this:

Lets maybe use bs4 for this, its fitting cause it can decompose HTML. Fixed!

Around 30 minutes later:

This issue is no longer relevant, it is fixed! using bs4.

Development brach additions (overview of functionallity):

As a example of the functionallity we use a command to call our sanizizer using the strict mode and we specifiy a configuration living in examples/config_example.json:

cat ~/Documents/INF6B/html/wm/startseite_wm.html | python src/main.py --mode strict > out.html

We output to a file called out.html, this is what the stdout of our programm looks like. if we grad stderr we get any debugging information aswell as errors / warnings / info

command output:

(venv) sebastian@kubuntu:~/Documents/sanigi-html$ cat ~/Documents/INF6B/html/wm/startseite_wm.html | python src/main.py --mode strict > out.html
[ DEBUG@2026-04-20 12:32:50 ]: called sanitizer! using this as args: 
<!DOCTYPE html>

<html lang="en">

<h1>Die Fußball-Weltmeisterschaft 2026</h1>
<p id="h1_under">vom 11. Juni bis 19. Juli 2026 in Kanada, Mexiko und den USA</p>
<img height="480" src="images/wmlogo.jpg" width="640"/>
<ul>
<li>Eröffnungsspiel:
            <ul>
<li>Am 11. Juni 2026 um 21:00 Uhr im Aztekenstadion in Mexiko-Stadt (Mexiko vs. Südafrika)</li>
</ul>
</li>
<li>Finale:
            <ul>
<li>Am 19. Juli 2026 im MetLife Stadium in East Rutherford, New Jersey</li>
</ul>
</li>
<li>Teilnehmer:
            <ul>
<li>Erste WM mit 48 teilnehmenden Nationen</li>
</ul>
</li>
<li>Format:
            <ul>
<li>Insgesamt 104 Spiele in 12 Gruppen</li>
<li>Austragung in 16 Stadien in drei Ländern</li>
</ul>
</li>
<li>Zeitzonen:
            <ul>
<li>Das Turnier erstreckt sich über vier verschiedene Zeitzonen in Nordamerika</li>
</ul>
</li>
<li>Maskottchen:
            <ul>
<li>Maple, Zayu &amp; Clutch</li>
</ul>
</li>
</ul>

</html>['html', 'body', 'header', 'main', 'footer', 'section', 'article', 'nav', 'aside', 'h1', 'h2', 'h3', 'h4', 'h5', 'h6', 'p', 'pre', 'code', 'blockquote', 'ul', 'ol', 'li', 'dl', 'dt', 'dd', 'br', 'hr', 'a', 'img', 'figure', 'figcaption', 'table', 'thead', 'tbody', 'tfoot', 'tr', 'th', 'td', 'strong', 'em', 'b', 'i', 'u', 'small', 'details', 'summary', 'time']
['http', 'https', 'mailto']
True

This is what the programm outputted to the stdout file (inserted into out.html):

   
    <!DOCTYPE html>

    <html>

    <!-- sanigi-html parsed @ 2026-04-20 12:42:08.625481-->
    <head></head>

    <body>



<h1>Die Fußball-Weltmeisterschaft 2026</h1>
<p id="h1_under">vom 11. Juni bis 19. Juli 2026 in Kanada, Mexiko und den USA</p>
<img height="480" width="640">
<ul>
<li>Eröffnungsspiel:
            <ul>
<li>Am 11. Juni 2026 um 21:00 Uhr im Aztekenstadion in Mexiko-Stadt (Mexiko vs. Südafrika)</li>
</ul>
</li>
<li>Finale:
            <ul>
<li>Am 19. Juli 2026 im MetLife Stadium in East Rutherford, New Jersey</li>
</ul>
</li>
<li>Teilnehmer:
            <ul>
<li>Erste WM mit 48 teilnehmenden Nationen</li>
</ul>
</li>
<li>Format:
            <ul>
<li>Insgesamt 104 Spiele in 12 Gruppen</li>
<li>Austragung in 16 Stadien in drei Ländern</li>
</ul>
</li>
<li>Zeitzonen:
            <ul>
<li>Das Turnier erstreckt sich über vier verschiedene Zeitzonen in Nordamerika</li>
</ul>
</li>
<li>Maskottchen:
            <ul>
<li>Maple, Zayu &amp; Clutch</li>
</ul>
</li>
</ul>

</body>

    </html>

Fix (22/04/26):

rewrite of sanizizer.py

now output looks like this:

<!DOCTYPE html>
<html>
<!-- sanigi-html parsed @ 2026-04-22 20:23:01.043256 -->
<head>
<meta charset="utf-8">
<meta content="width=device-width, initial-scale=1.0" name="viewport">
<title>Document</title>
</head>
<body>
<h1>Test</h1>
<p>This is a test</p>
</body>
</html>

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