[tahoe-lafs-trac-stream] [tahoe-lafs] #1386: KeyError: 'file' if the local file is removed after selection and before Submit

[tahoe-lafs]

#1386: KeyError: 'file' if the local file is removed after selection and before
Submit
-----------------------------------+------------------------------------
     Reporter:  zooko              |      Owner:  davidsarah
         Type:  defect             |     Status:  assigned
     Priority:  normal             |  Milestone:  1.11.0
    Component:  code-frontend-web  |    Version:  1.8.2
   Resolution:                     |   Keywords:  http upload error easy
Launchpad Bug:                     |
-----------------------------------+------------------------------------
Changes (by davidsarah):

 * milestone:  1.10.0 => 1.11.0


Old description:

> I left a large upload running through the WUI overnight. In the morning
> it was still running, but I accidentally hit the "private browsing" key
> in Firefox 4 and then hit it again. This seems to have aborted the upload
> (which was probably still transferring the file from the web browser to
> the tahoe-lafs gateway and had probably not even begun to upload from the
> tahoe-lafs gateway to the tahoe-lafs servers). So, I clicked the
> {{{Upload}}} button again, and to my surprise I got this traceback:
> {{{
> 2011-03-31 05:39:07-0600 [HTTPChannel,21,127.0.0.1] Unhandled Error
>         Traceback (most recent call last):
>           File "/Library/Python/2.6/site-
> packages/Twisted-10.2.0-py2.6-macosx-10.6-universal.egg/twisted/internet/defer.py",
> line 297, in addCallback
>             callbackKeywords=kw)
>           File "/Library/Python/2.6/site-
> packages/Twisted-10.2.0-py2.6-macosx-10.6-universal.egg/twisted/internet/defer.py",
> line 286, in addCallbacks
>             self._runCallbacks()
>           File "/Library/Python/2.6/site-
> packages/Twisted-10.2.0-py2.6-macosx-10.6-universal.egg/twisted/internet/defer.py",
> line 542, in _runCallbacks
>             current.result = callback(current.result, *args, **kw)
>           File "/Users/owhielaclient/tahoe-lafs/support/lib/python2.6
> /site-packages/Nevow-0.10.0-py2.6.egg/nevow/appserver.py", line 163, in
> gotPageContext
>             pageContext.tag.renderHTTP, pageContext
>         --- <exception caught here> ---
>           File "/Library/Python/2.6/site-
> packages/Twisted-10.2.0-py2.6-macosx-10.6-universal.egg/twisted/internet/defer.py",
> line 133, in maybeDeferred
>             result = f(*args, **kw)
>           File "/Users/owhielaclient/tahoe-
> lafs/src/allmydata/web/common.py", line 302, in renderHTTP
>             return m(ctx)
>           File "/Users/owhielaclient/tahoe-
> lafs/src/allmydata/web/directory.py", line 202, in render_POST
>             d = self._POST_upload(ctx) # this one needs the context
>           File "/Users/owhielaclient/tahoe-
> lafs/src/allmydata/web/directory.py", line 307, in _POST_upload
>             contents = req.fields["file"]
>           File
> "/System/Library/Frameworks/Python.framework/Versions/2.6/lib/python2.6/cgi.py",
> line 520, in __getitem__
>             raise KeyError, key
>         exceptions.KeyError: 'file'
> }}}
> I'll attach the debugging output that the gateway returned to my browser.

New description:

 I left a large upload running through the WUI overnight. In the morning it
 was still running, but I accidentally hit the "private browsing" key in
 Firefox 4 and then hit it again. This seems to have aborted the upload
 (which was probably still transferring the file from the web browser to
 the tahoe-lafs gateway and had probably not even begun to upload from the
 tahoe-lafs gateway to the tahoe-lafs servers). So, I clicked the
 {{{Upload}}} button again, and to my surprise I got this traceback:
 {{{
 2011-03-31 05:39:07-0600 [HTTPChannel,21,127.0.0.1] Unhandled Error
         Traceback (most recent call last):
           File "/Library/Python/2.6/site-
 packages/Twisted-10.2.0-py2.6-macosx-10.6-universal.egg/twisted/internet/defer.py",
 line 297, in addCallback
             callbackKeywords=kw)
           File "/Library/Python/2.6/site-
 packages/Twisted-10.2.0-py2.6-macosx-10.6-universal.egg/twisted/internet/defer.py",
 line 286, in addCallbacks
             self._runCallbacks()
           File "/Library/Python/2.6/site-
 packages/Twisted-10.2.0-py2.6-macosx-10.6-universal.egg/twisted/internet/defer.py",
 line 542, in _runCallbacks
             current.result = callback(current.result, *args, **kw)
           File "/Users/owhielaclient/tahoe-lafs/support/lib/python2.6
 /site-packages/Nevow-0.10.0-py2.6.egg/nevow/appserver.py", line 163, in
 gotPageContext
             pageContext.tag.renderHTTP, pageContext
         --- <exception caught here> ---
           File "/Library/Python/2.6/site-
 packages/Twisted-10.2.0-py2.6-macosx-10.6-universal.egg/twisted/internet/defer.py",
 line 133, in maybeDeferred
             result = f(*args, **kw)
           File "/Users/owhielaclient/tahoe-
 lafs/src/allmydata/web/common.py", line 302, in renderHTTP
             return m(ctx)
           File "/Users/owhielaclient/tahoe-
 lafs/src/allmydata/web/directory.py", line 202, in render_POST
             d = self._POST_upload(ctx) # this one needs the context
           File "/Users/owhielaclient/tahoe-
 lafs/src/allmydata/web/directory.py", line 307, in _POST_upload
             contents = req.fields["file"]
           File
 "/System/Library/Frameworks/Python.framework/Versions/2.6/lib/python2.6/cgi.py",
 line 520, in __getitem__
             raise KeyError, key
         exceptions.KeyError: 'file'
 }}}
 I'll attach the debugging output that the gateway returned to my browser.

--

-- 
Ticket URL: <https://tahoe-lafs.org/trac/tahoe-lafs/ticket/1386#comment:7>
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