[mod_python] Re: Mike's psp upload

Mike Looijmans nlv11281 at natlab.research.philips.com
Tue Feb 21 01:48:46 EST 2006

I saw that traceback too, but it is util.py that is going wrong here:

## code snippet from mod_python/util.py
    def __getitem__(self, key):
        """Dictionary style indexing."""
        if self.list is None:
            raise TypeError, "not indexable"
        found = []
        for item in self.list:
            if item.name == key:
                if isinstance(item.file, FileType) or \
                       isinstance(getattr(item.file, 'file', None), 
        if not found:
            raise KeyError, key
        if len(found) == 1:
            return found[0]
            return found
## end code snippet from mod_python/util.py

The result is that the callback will ONLY work if you create a REAL file 
in make_file. Otherwise, the "isinstance(item.file, FileType)" will 
return FALSE and it creates a StringField, which attempts to read the 
whole file into memory (not a good idea). Then you get the stacktrace. 
It also means that you won't get the filename back from the form.

I have submitted a patch that fixes the issue, but it is scheduled for 
3.3 now.

Mike Looijmans
Philips Natlab / Topic Automation

Daniel Nogradi wrote:
>>Hmm. I tested and indeed, the program does not work any more.
>>The problem is NOT that FileCounter does not supply a read() method though.
>>There's no reason for
>>any object to 'read' the file, it's just writing it.
> Well, here is the traceback that I get:
> Mod_python error: "PythonHandler mod_python.psp"
> Traceback (most recent call last):
>   File "/usr/lib/python2.3/site-packages/mod_python/apache.py", line
> 299, in HandlerDispatch
>     result = object(req)
>   File "/usr/lib/python2.3/site-packages/mod_python/psp.py", line 302,
> in handler
>     p.run()
>   File "/usr/lib/python2.3/site-packages/mod_python/psp.py", line 213, in run
>     exec code in global_scope
>   File "/var/www/html/psp/upload.psp", line 43, in ?
>     for afile in frm.getlist('archivefile'):
>   File "/usr/lib/python2.3/site-packages/mod_python/util.py", line
> 354, in getlist
>     found.append(StringField(item.value))
>   File "/usr/lib/python2.3/site-packages/mod_python/util.py", line 74,
> in __getattr__
>     value = self.file.read()
> AttributeError: FileCounter instance has no attribute 'read'
> That seems pretty clear about a required 'read' method in util.py.
>>(Oh, and remove the reference to 'fmt.py' which I forgot to strip out)
> Yes of course, I removed that.
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