Opened 10 years ago

Closed 10 years ago

#2715 closed defect (wontfix)

Uploads from Flash 8 cannot be parsed in Python 2.3

Reported by: frederik@… Owned by: adrian
Component: Core (Other) Version: master
Severity: normal Keywords: upload http
Cc: Triage Stage: Unreviewed
Has patch: no Needs documentation: no
Needs tests: no Patch needs improvement: no
Easy pickings: UI/UX:


Flash 8 SWF files can upload files to a server. It features progress monitoring and multiple file upload, making it a useful alternative to regular browser uploads. The HTTP request is improperly formatted however, missing an extra carriage return at the end. This results in the following (partial) stacktrace:

  File "django/core/handlers/", line 99, in _get_post
  File "django/core/handlers/", line 77, in _load_post_and_files
    self._post, self._files = http.parse_file_upload(header_dict, self.raw_post_data)
  File "django/http/", line 58, in parse_file_upload
    msg = email.message_from_string(raw_message)
  File "/System/Library/Frameworks/Python.framework/Versions/2.3/lib/python2.3/email/", line 52, in message_from_string
    return Parser(_class, strict=strict).parsestr(s)
  File "/System/Library/Frameworks/Python.framework/Versions/2.3/lib/python2.3/email/", line 75, in parsestr
    return self.parse(StringIO(text), headersonly=headersonly)
  File "/System/Library/Frameworks/Python.framework/Versions/2.3/lib/python2.3/email/", line 64, in parse
    self._parsebody(root, fp, firstbodyline)
  File "/System/Library/Frameworks/Python.framework/Versions/2.3/lib/python2.3/email/", line 206, in _parsebody
    raise Errors.BoundaryError(
BoundaryError: No terminating boundary and no trailing empty line

I added patch that adds an extra carriage return after the post_data in parse_file_upload. To my knowledge, the patch doesn't affect normal uploads: Python's email parser parses them just fine. If it does, we could check for the user agent in the header.

Attachments (1)

flash8fix.patch (498 bytes) - added by frederik@… 10 years ago.
Adds an extra carriage return to the raw_message in parse_file_upload

Download all attachments as: .zip

Change History (2)

Changed 10 years ago by frederik@…

Adds an extra carriage return to the raw_message in parse_file_upload

comment:1 Changed 10 years ago by frederik@…

  • Resolution set to wontfix
  • Status changed from new to closed

Both python 2.3 and python 2.4 have problems with this message. Python 2.4 can parse it (it adds defects to the message), but the follow-up django code fails.

My advice, however, is to use Flash 9, which generates a correct HTTP request.

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