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POGoogle Cloud Messaging HTTP Error 400: Bad Request
 

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    <p>I am trying to send a message through GCM (Google Cloud Messaging). I have registered through Google APIs, I can send a regID to my website (which is a Google App Engine Backend) from multiple Android test phones. However, I can't send anything to GCM from Google App Engine. Here is what I am trying to use.</p> <pre><code> regId = "APA91b..." json_data = {"collapse_key" : "Food-Promo", "data" : { "Category" : "FOOD", "Type": "VEG", }, "registration_ids": [regId], } url = 'https://android.googleapis.com/gcm/send' apiKey = "AI..." myKey = "key=" + apiKey headers = {'Content-Type': 'application/json', 'Authorization': myKey} data = urllib.urlencode(json_data) data2 = {"title": title} data3 = urllib.urlencode(data2) req = urllib2.Request(url, data, headers) f = urllib2.urlopen(req) response = f.read() f.close() logging.debug("***!!!!!!!WriteEntry TEST ----- Response: " + response) </code></pre> <p>And here is the error that I am receiving.</p> <pre><code>Traceback (most recent call last): File "/base/python_runtime/python_lib/versions/1/google/appengine/ext/webapp/_webapp25.py", line 703, in __call__ handler.post(*groups) File "/base/data/home/apps/s~journaltestza/26.360625174851783344/main.py", line 213, in post f = urllib2.urlopen(req) File "/base/python_runtime/python_dist/lib/python2.5/urllib2.py", line 124, in urlopen return _opener.open(url, data) File "/base/python_runtime/python_dist/lib/python2.5/urllib2.py", line 387, in open response = meth(req, response) File "/base/python_runtime/python_dist/lib/python2.5/urllib2.py", line 498, in http_response 'http', request, response, code, msg, hdrs) File "/base/python_runtime/python_dist/lib/python2.5/urllib2.py", line 425, in error return self._call_chain(*args) File "/base/python_runtime/python_dist/lib/python2.5/urllib2.py", line 360, in _call_chain result = func(*args) File "/base/python_runtime/python_dist/lib/python2.5/urllib2.py", line 506, in http_error_default raise HTTPError(req.get_full_url(), code, msg, hdrs, fp) HTTPError: HTTP Error 400: Bad Request </code></pre> <p>Thanks!</p>
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