Fixed #4947 -- Avoid displaying uploaded file contents in the debug web page. Based on a patch from eibaan@gmail.com.

git-svn-id: http://code.djangoproject.com/svn/django/trunk@5874 bcc190cf-cafb-0310-a4f2-bffc1f526a37

AUTHORS

@@ -101,6 +101,7 @@ answer newbie questions, and generally made Django that much better:
     dusk@woofle.net
     Andy Dustman <farcepest@gmail.com>
     Clint Ecker
+    eibaan@gmail.com
     enlight
     Enrico <rico.bl@gmail.com>
     A. Murat Eren <meren@pardus.org.tr>

django/http/__init__.py

@@ -2,7 +2,7 @@ import os
 from Cookie import SimpleCookie
 from pprint import pformat
 from urllib import urlencode
-from django.utils.datastructures import MultiValueDict
+from django.utils.datastructures import MultiValueDict, FileDict
 from django.utils.encoding import smart_str, iri_to_uri, force_unicode
 
 RESERVED_CHARS="!*'();:@&=+$,/?%#[]"
@@ -88,11 +88,11 @@ def parse_file_upload(header_dict, post_data):
                 # directory separator, which may not be the same as the
                 # client's one.)
                 filename = name_dict['filename'][name_dict['filename'].rfind("\\")+1:]
-                FILES.appendlist(name_dict['name'], {
+                FILES.appendlist(name_dict['name'], FileDict({
                     'filename': filename,
                     'content-type': 'Content-Type' in submessage and submessage['Content-Type'] or None,
                     'content': submessage.get_payload(),
-                })
+                }))
             else:
                 POST.appendlist(name_dict['name'], submessage.get_payload())
     return POST, FILES

django/utils/datastructures.py

@@ -267,3 +267,16 @@ class DotExpandedDict(dict):
                 current[bits[-1]] = v
             except TypeError: # Special-case if current isn't a dict.
                 current = {bits[-1] : v}
+
+class FileDict(dict):
+    """
+    A dictionary used to hold uploaded file contents. The only special feature
+    here is that repr() of this object won't dump the entire contents of the
+    file to the output. A handy safeguard for a large file upload.
+    """
+    def __repr__(self):
+        if 'content' in self:
+            d = dict(self, content='<omitted>')
+            return dict.__repr__(d)
+        return dict.__repr__(self)
+

tests/regressiontests/datastructures/tests.py

@@ -64,4 +64,13 @@ True
 ['Holovaty']
 >>> d['person']['2']['firstname']
 ['Adrian']
+
+### FileDict ################################################################
+
+>>> d = FileDict({'content': 'once upon a time...'})
+>>> repr(d)
+"{'content': '<omitted>'}"
+>>> d = FileDict({'other-key': 'once upon a time...'})
+>>> repr(d)
+"{'other-key': 'once upon a time...'}"
 """