diff --git a/html-extract-stupid b/html-extract-stupid
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+++ b/html-extract-stupid
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+#!/bin/bash
+# Reads HTML from stdin, extracts links and page requisites with simple string splitting and regexes.
+# Usage cannot be recommended against enough.
+# Produces lines of 'TAG URL', e.g. 'a https://example.org/'.
+{
+ # Reformat so each line is one tag
+ # Yes, this may break attribute values if they contain CR, LF, or <, but that's rare enough.
+ tr '\r\n' ' ' | tr '<' '\n' |
+
+ # Extract tags of interest
+ grep -i '^\(a\|base\|img\|link\|script\)\s' |
+
+ # Fix scripty backslash nonsense
+ perl -pe 's,\\,,g' |
+
+ # Split img tags with src and srcset
+ perl -pe "s,^img(?=\s(?:(?:[^>'\"]|\"[^\"]*\"|'[^']*')*\s)?src\s*=\s*([^>'\"\s]*|\"[^\"]*\"|'[^']*')(?:\s|>))\s(?:(?:[^>'\"]|\"[^\"]*\"|'[^']*')*\s)?srcset\s*=\s*([^>'\"\s]*|\"[^\"]*\"|'[^']*')(\s|>).*,img src=\1\nimg srcset=\2," |
+
+ # Extract interesting tags/attributes
+ perl -pe "s,^(a|base)\s(?:(?:[^>'\"]|\"[^\"]*\"|'[^']*')*\s)?href\s*=\s*([^>'\"\s]*|\"[^\"]*\"|'[^']*')(\$|\s|>).*,+\1 \2,i;
+ s,^(img|script)\s(?:(?:[^>'\"]|\"[^\"]*\"|'[^']*')*\s)?src\s*=\s*([^>'\"\s]*|\"[^\"]*\"|'[^']*')(\$|\s|>).*,+\1 \2,i;
+ s,^(link)\s(?=(?:(?:[^>'\"]|\"[^\"]*\"|'[^']*')*\s)?rel\s*=\s*(?:stylesheet|\"(?:[^\"]*\s)?stylesheet(?:\s[^\"]*)?\"|'(?:[^']*\s)?stylesheet(?:\s[^']*)?')(?:\$|\s|>))(?:(?:[^>'\"]|\"[^\"]*\"|'[^']*')*\s)?href\s*=\s*([^>'\"\s]*|\"[^\"]*\"|'[^']*')(\$|\s|>).*,+\1 \2,i;
+ s,^(img)\s(?:(?:[^>'\"]|\"[^\"]*\"|'[^']*')*\s)?(srcset)\s*=\s*([^>'\"\s]*|\"[^\"]*\"|'[^']*')(\$|\s|>).*,+\1\2 \3,i;
+ # Ensure that there's a LF at the end of each line since \s might match it.
+ s,\s*$,\n,;
+ " |
+
+ # Filter out unprocessed lines
+ grep '^+' | sed 's,^+,,' |
+
+ # Remove quotes from attribute values
+ perl -pe "s,^([a-zA-Z]+) (['\"])(.*)\2$,\1 \3," |
+
+ # img srcset splitting
+ python3 -c 'import re, sys'$'\n''for l in map(str.strip, sys.stdin):'$'\n'' tag, value = l.split(" ", 1)'$'\n'' if tag != "imgsrcset":'$'\n'' print(l); continue'$'\n'' for url in re.split(r"\s+\d+[wx]\s*(?:,\s*|$)|,\s+", value.strip()):'$'\n'' if url: print(f"img {url}")' |
+
+ # Decode HTML references
+ python3 -c 'import html, sys'$'\n''for l in sys.stdin:'$'\n'' try: print(html.unescape(l.strip()))'$'\n'' except BrokenPipeError: break' |
+
+ # Combine base and values to get absolute URLs
+ # If multiple base tags are present, they all get respected. This violates the HTML specs.
+ python3 -c 'import sys, urllib.parse; base = None'$'\n''for l in map(str.strip, sys.stdin):'$'\n'' tag, value = l.split(" ", 1)'$'\n'' tag = tag.lower()'$'\n'' if base:'$'\n'' value = urllib.parse.urljoin(base, value)'$'\n'' if tag == "base":'$'\n'' base = value'$'\n'' continue'$'\n'' try: print(f"{tag} {value}")'$'\n'' except BrokenPipeError: break'
+}