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POPost request with multipart/form-data in appengine python not working
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10066540
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10144903
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2
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CreationDate
2012-04-08T21:10:08.810
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2
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2012-04-17T15:58:37.907
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2012-04-17T09:12:35.960
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714852
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714852
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Body
<p>I'm attempting to send a multipart post request from an appengine app to an external (django) api hosted on dotcloud. The request includes some text and a file (pdf) and is sent using the following code</p> <pre><code>from google.appengine.api import urlfetch from poster.encode import multipart_encode from libs.poster.streaminghttp import register_openers register_openers() file_data = self.request.POST['file_to_upload'] the_file = file_data send_url = "http://127.0.0.1:8000/" values = { 'user_id' : '12341234', 'the_file' : the_file } data, headers = multipart_encode(values) headers['User-Agent'] = 'Mozilla/4.0 (compatible; MSIE 5.5; Windows NT)' data = str().join(data) result = urlfetch.fetch(url=send_url, payload=data, method=urlfetch.POST, headers=headers) logging.info(result.content) </code></pre> <p>When this method runs Appengine gives the following warning (I'm not sure if it's related to my issue)</p> <pre><code>Stripped prohibited headers from URLFetch request: ['Content-Length'] </code></pre> <p>And Django sends through the following error</p> <pre><code><class 'django.utils.datastructures.MultiValueDictKeyError'>"Key 'the_file' not found in <MultiValueDict: {}>" </code></pre> <p>The django code is pretty simple and works when I use the postman chrome extension to send a file.</p> <pre><code>@csrf_exempt def index(request): try: user_id = request.POST["user_id"] the_file = request.FILES["the_file"] return HttpResponse("OK") except: return HttpResponse(sys.exc_info()) </code></pre> <p>If I add </p> <pre><code>print request.POST.keys() </code></pre> <p>I get a dictionary containing user_id and the_file indicating that the file is not being sent as a file. if I do the same for FILES i.e.</p> <pre><code>print request.FILES.keys() </code></pre> <p>I get en empty list [].</p> <h1>EDIT 1:</h1> <p>I've changed my question to implement the suggestion of someone1 however this still fails. I also included the headers addition recommended by the link Glenn sent, but no joy.</p> <h1>EDIT 2:</h1> <p>I've also tried sending the_file as variations of </p> <pre><code>the_file = file_data.file the_file = file_data.file.read() </code></pre> <p>But I get the same error.</p> <h1>EDIT 3:</h1> <p>I've also tried editing my django app to </p> <pre><code>the_file = request.POST["the_file"] </code></pre> <p>However when I try to save the file locally with</p> <pre><code>path = default_storage.save(file_location, ContentFile(the_file.read())) </code></pre> <p>it fails with </p> <pre><code><type 'exceptions.AttributeError'>'unicode' object has no attribute 'read'<traceback object at 0x101f10098> </code></pre> <p>similarly if I try access the_file.file (as I can access in my appengine app) it tells me</p> <pre><code><type 'exceptions.AttributeError'>'unicode' object has no attribute 'file'<traceback object at 0x101f06d40> </code></pre>
Tags
<python><django><google-app-engine><post>
Title
Post request with multipart/form-data in appengine python not working
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