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Django 1.1.1 chokes on multipart/form-data

Answer 1

+4 A:

You may need to provide your view and form code as we use form uploads with enctype="multipart/form-data" in Django 1.1.1 with great success.

The following dummy app, for example, works perfectly in the dev server.

views.py

from django import forms
from django.shortcuts import render_to_response

class UploadForm(forms.Form):
    cpk = forms.CharField(max_length=256)
    f = forms.FileField()

def my_upload_view(request):
    if request.method == 'POST':
        form = UploadForm(request.POST, request.FILES)
        if form.is_valid():
            print "Got cpk",form.cleaned_data['cpk']
            print "Got file",request.FILES['f'].read()
    else:
        form = UploadForm()
    return render_to_response('upload.html', {'form':form})

upload.html

<html>
<body>
    <form enctype="multipart/form-data" method="post">
        {{ form.f }}
        {{ form.cpk }}
        <input type="submit" />
    </form>
</body>
</html>

I'm using the django form instance to render the file input, but it renders the very common <input type="file" name="f" id="id_f" />.

Using this sample, I get the content of the file (I've tested using a simple text file) printed to the terminal from my dev server. The few gotchas and tests I can recommend are:

ensure that the file you are uploading is less than settings.FILE_UPLOAD_MAX_MEMORY_SIZE (the default is 2.5 MB)
double-check that you haven't defined any custom file upload handlers that may be breaking the upload process (settings.FILE_UPLOAD_HANDLERS)
try uploading a very simple file (like a small text file) to see if the issue still persists with something basic
use a tool to inspect the raw HTTP request/response traffic (firebug will do this for you, and there are some stand-alone apps that will act as a proxy to help you here too)... sometimes the solution will jump out when you can see the raw traffic.

In case you haven't found them yet, the django file upload docs have a fair number of examples.

Jarret Hardie 2010-02-26 14:03:09

I've just tried you dummy app - it stucks if pasted into my project, but works perfectly if run as standalone project! That explains all those anomalies, I haven't even suspected that I might be breaking Django request processing at some point. Thank you!

Tomasz Zielinski 2010-03-01 09:34:11

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Django 1.1.1 chokes on multipart/form-data

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