Merged revisions 67528 via svnmerge from

svn+ssh://pythondev@svn.python.org/python/trunk

........
  r67528 | fred.drake | 2008-12-04 13:25:17 -0500 (Thu, 04 Dec 2008) | 4 lines

  Issue #1055234: cgi.parse_header(): Fixed parsing of header parameters to
  support unusual filenames (such as those containing semi-colons) in
  Content-Disposition headers.
........

Author: freddrake

Lib/cgi.py

@@ -289,16 +289,28 @@ def parse_multipart(fp, pdict):
     return partdict
 
 
+def _parseparam(s):
+    while s[:1] == ';':
+        s = s[1:]
+        end = s.find(';')
+        while end > 0 and s.count('"', 0, end) % 2:
+            end = s.find(';', end + 1)
+        if end < 0:
+            end = len(s)
+        f = s[:end]
+        yield f.strip()
+        s = s[end:]
+
 def parse_header(line):
     """Parse a Content-type like header.
 
     Return the main content-type and a dictionary of options.
 
     """
-    plist = [x.strip() for x in line.split(';')]
-    key = plist.pop(0).lower()
+    parts = _parseparam(';' + line)
+    key = parts.next()
     pdict = {}
-    for p in plist:
+    for p in parts:
         i = p.find('=')
         if i >= 0:
             name = p[:i].strip().lower()

Lib/test/test_cgi.py

@@ -354,6 +354,32 @@ def test_deprecated_parse_qsl(self):
         self.assertEqual([('a', 'A1'), ('b', 'B2'), ('B', 'B3')],
                          cgi.parse_qsl('a=A1&b=B2&B=B3'))
 
+    def test_parse_header(self):
+        self.assertEqual(
+            cgi.parse_header("text/plain"),
+            ("text/plain", {}))
+        self.assertEqual(
+            cgi.parse_header("text/vnd.just.made.this.up ; "),
+            ("text/vnd.just.made.this.up", {}))
+        self.assertEqual(
+            cgi.parse_header("text/plain;charset=us-ascii"),
+            ("text/plain", {"charset": "us-ascii"}))
+        self.assertEqual(
+            cgi.parse_header('text/plain ; charset="us-ascii"'),
+            ("text/plain", {"charset": "us-ascii"}))
+        self.assertEqual(
+            cgi.parse_header('text/plain ; charset="us-ascii"; another=opt'),
+            ("text/plain", {"charset": "us-ascii", "another": "opt"}))
+        self.assertEqual(
+            cgi.parse_header('attachment; filename="silly.txt"'),
+            ("attachment", {"filename": "silly.txt"}))
+        self.assertEqual(
+            cgi.parse_header('attachment; filename="strange;name"'),
+            ("attachment", {"filename": "strange;name"}))
+        self.assertEqual(
+            cgi.parse_header('attachment; filename="strange;name";size=123;'),
+            ("attachment", {"filename": "strange;name", "size": "123"}))
+
 
 def test_main():
     run_unittest(CgiTests)

Misc/NEWS

@@ -52,6 +52,10 @@ Core and Builtins
 Library
 -------
 
+- Issue #1055234: cgi.parse_header(): Fixed parsing of header parameters to
+  support unusual filenames (such as those containing semi-colons) in
+  Content-Disposition headers.
+
 - Issue #3741: DISTUTILS_USE_SDK set causes msvc9compiler.py to raise an
   exception.