Upload file from iPhone to Django

Question

Sorry, a beginner's question: I have a very simple function in my Django application with which I can upload a file from a web browser to my server (works perfectly!). Now, instead of the web browser, I would like to use an iPhone.

I got a bit stuck as I don't really know how to provide Django with a valid form, i.e. we need a file name and enctype="multipart/form-data" as far as I understand.

Here is my upload function in Django:

class UploadFileForm(forms.Form):
    file  = forms.FileField()

def handle_uploaded_file(f):
    destination = open('uploads/example.txt', 'wb+')
    for chunk in f.chunks():
        destination.write(chunk)
    destination.close()

def upload_file(request):
    if request.method == 'POST':
        form = UploadFileForm(request.POST, request.FILES)
        if form.is_valid():
            handle_uploaded_file(request.FILES['file'])
            print form
            print request.FILES
            return HttpResponse('Upload Successful')
    else:
        form = UploadFileForm()
    return render_to_response('upload.html', {'form': form})

My template looks like this (upload.html):

<form action="" method="post" enctype="multipart/form-data">
    {{ form.file }}
    {{ form.non_field_errors }}
    <input type="submit" value="Upload" />
</form>

Now, let's suppose that I want to send a simple txt file from my iPhone app to the sever. I don't really know how to:

1. provide the file name
2. specify the enctype and
3. make sure that it's in a format Django can read

This is how far I got:

NSString *fileContents = [self loadTXTFromDisk:@"example.txt"];

NSMutableURLRequest *request = [[NSMutableURLRequest alloc] 
                                initWithURL:[NSURL 
                                             URLWithString:@"http://127.0.0.1:8000/uploadfile/"]];


[request setHTTPMethod:@"POST"];
[request setValue:@"text/xml"   forHTTPHeaderField:@"Content-type"];
[request setValue:[NSString stringWithFormat:@"%d", [fileContents length]] 
                                forHTTPHeaderField:@"Content-length"];
[request setHTTPBody:[fileContents dataUsingEncoding:NSUTF8StringEncoding]];

NSURLConnection *theConnection = [[NSURLConnection alloc] 
                                  initWithRequest:request 
                                  delegate:self];

However, Django will not except this as the form it expects is not valid. Cf. above:

form = UploadFileForm(request.POST, request.FILES)
if form.is_valid(): #this will not be true ...