[Python-checkins] cpython (3.3): Issue #15207: Fix mimetypes to read from correct area in Windows registry

[tim.golden]

http://hg.python.org/cpython/rev/95b88273683c
changeset:   86577:95b88273683c
branch:      3.3
parent:      86561:4c4f31a1b706
user:        Tim Golden <mail at timgolden.me.uk>
date:        Tue Oct 22 19:27:34 2013 +0100
summary:
  Issue #15207: Fix mimetypes to read from correct area in Windows registry (Original patch by Dave Chambers)

files:
  Doc/library/mimetypes.rst  |   3 +++
  Lib/mimetypes.py           |  22 ++++++++++++----------
  Lib/test/test_mimetypes.py |   3 ++-
  Misc/ACKS                  |   1 +
  Misc/NEWS                  |   3 +++
  5 files changed, 21 insertions(+), 11 deletions(-)


diff --git a/Doc/library/mimetypes.rst b/Doc/library/mimetypes.rst
--- a/Doc/library/mimetypes.rst
+++ b/Doc/library/mimetypes.rst
@@ -85,6 +85,9 @@
    :const:`knownfiles` takes precedence over those named before it.  Calling
    :func:`init` repeatedly is allowed.
 
+   Specifying an empty list for *files* will prevent the system defaults from
+   being applied: only the well-known values will be present from a built-in list.
+
    .. versionchanged:: 3.2
       Previously, Windows registry settings were ignored.
 
diff --git a/Lib/mimetypes.py b/Lib/mimetypes.py
--- a/Lib/mimetypes.py
+++ b/Lib/mimetypes.py
@@ -249,19 +249,21 @@
                     yield ctype
                 i += 1
 
-        with _winreg.OpenKey(_winreg.HKEY_CLASSES_ROOT,
-                             r'MIME\Database\Content Type') as mimedb:
-            for ctype in enum_types(mimedb):
+        with _winreg.OpenKey(_winreg.HKEY_CLASSES_ROOT, '') as hkcr:
+            for subkeyname in enum_types(hkcr):
                 try:
-                    with _winreg.OpenKey(mimedb, ctype) as key:
-                        suffix, datatype = _winreg.QueryValueEx(key,
-                                                                'Extension')
+                    with _winreg.OpenKey(hkcr, subkeyname) as subkey:
+                        # Only check file extensions
+                        if not subkeyname.startswith("."):
+                            continue
+                        # raises EnvironmentError if no 'Content Type' value
+                        mimetype, datatype = _winreg.QueryValueEx(
+                            subkey, 'Content Type')
+                        if datatype != _winreg.REG_SZ:
+                            continue
+                        self.add_type(mimetype, subkeyname, strict)
                 except EnvironmentError:
                     continue
-                if datatype != _winreg.REG_SZ:
-                    continue
-                self.add_type(ctype, suffix, strict)
-
 
 def guess_type(url, strict=True):
     """Guess the type of a file based on its URL.
diff --git a/Lib/test/test_mimetypes.py b/Lib/test/test_mimetypes.py
--- a/Lib/test/test_mimetypes.py
+++ b/Lib/test/test_mimetypes.py
@@ -98,7 +98,8 @@
         # Use file types that should *always* exist:
         eq = self.assertEqual
         eq(self.db.guess_type("foo.txt"), ("text/plain", None))
-
+        eq(self.db.guess_type("image.jpg"), ("image/jpeg", None))
+        eq(self.db.guess_type("image.png"), ("image/png", None))
 
 def test_main():
     support.run_unittest(MimeTypesTestCase,
diff --git a/Misc/ACKS b/Misc/ACKS
--- a/Misc/ACKS
+++ b/Misc/ACKS
@@ -201,6 +201,7 @@
 Matej Cepl
 Carl Cerecke
 Octavian Cerna
+Dave Chambers
 Pascal Chambon
 John Chandler
 Hye-Shik Chang
diff --git a/Misc/NEWS b/Misc/NEWS
--- a/Misc/NEWS
+++ b/Misc/NEWS
@@ -81,6 +81,9 @@
 Library
 -------
 
+- Issue #15207: Fix mimetypes to read from correct part of Windows registry
+  Original patch by Dave Chambers
+
 - Issue #8964: fix platform._sys_version to handle IronPython 2.6+.
   Patch by Martin Matusiak.
 

-- 
Repository URL: http://hg.python.org/cpython