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copied!<p>Here is some code I tested locally that should do the trick (I used a different handler than webapp2 but tried to modify it to webapp2. You'll also need the poster lib found here <a href="http://atlee.ca/software/poster/" rel="noreferrer">http://atlee.ca/software/poster/</a>):</p> <p>In your POST handler on GAE:</p> <pre><code>from google.appengine.api import urlfetch from poster.encode import multipart_encode payload = {} payload['test_file'] = self.request.POST['test_file'] payload['user_id'] = self.request.POST['user_id'] to_post = multipart_encode(payload) send_url = "http://127.0.0.1:8000/" result = urlfetch.fetch(url=send_url, payload="".join(to_post[0]), method=urlfetch.POST, headers=to_post[1]) logging.info(result.content) </code></pre> <p>Make sure your HTML form contains <code>method="POST" enctype="multipart/form-data"</code>. Hope this helps!</p> <p><strong>EDIT:</strong> I tried using the webapp2 handler and realized the way files are served are different than how the framework I used to test with works (KAY). Here is updated code that should do the trick (tested on production):</p> <pre><code>import webapp2 from google.appengine.api import urlfetch from poster.encode import multipart_encode, MultipartParam class UploadTest(webapp2.RequestHandler): def post(self): payload = {} file_data = self.request.POST['test_file'] payload['test_file'] = MultipartParam('test_file', filename=file_data.filename, filetype=file_data.type, fileobj=file_data.file) payload['name'] = self.request.POST['name'] data,headers= multipart_encode(payload) send_url = "http://127.0.0.1:8000/" t = urlfetch.fetch(url=send_url, payload="".join(data), method=urlfetch.POST, headers=headers) self.response.headers['Content-Type'] = 'text/plain' self.response.out.write(t.content) def get(self): self.response.out.write(""" <html> <head> <title>File Upload Test</title> </head> <body> <form action="" method="POST" enctype="multipart/form-data"> <input type="text" name="name" /> <input type="file" name="test_file" /> <input type="submit" value="Submit" /> </form> </body> </html>""") </code></pre>

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