Make mimetypes.guess_type understand data URLs. (Sjoerd Mullender)

Lib/mimetypes.py

@@ -25,6 +25,7 @@ read_mime_types(file) -- parse one file, return a dictionary or None
 
 import string
 import posixpath
+import urllib
 
 knownfiles = [
     "/usr/local/etc/httpd/conf/mime.types",
@@ -53,6 +54,26 @@ def guess_type(url):
     """
     if not inited:
         init()
+    scheme, url = urllib.splittype(url)
+    if scheme == 'data':
+	# syntax of data URLs:
+	# dataurl   := "data:" [ mediatype ] [ ";base64" ] "," data
+	# mediatype := [ type "/" subtype ] *( ";" parameter )
+	# data      := *urlchar
+	# parameter := attribute "=" value
+	# type/subtype defaults to "text/plain"
+	comma = string.find(url, ',')
+	if comma < 0:
+	    # bad data URL
+	    return None, None
+	semi = string.find(url, ';', 0, comma)
+	if semi >= 0:
+	    type = url[:semi]
+	else:
+	    type = url[:comma]
+	if '=' in type or '/' not in type:
+	    type = 'text/plain'
+	return type, None		# never compressed, so encoding is None
     base, ext = posixpath.splitext(url)
     while suffix_map.has_key(ext):
         base, ext = posixpath.splitext(base + suffix_map[ext])