Google云消息传递HTTP错误400：错误的请求 [英] Google Cloud Messaging HTTP Error 400: Bad Request

问题描述

我试图通过GCM（Google Cloud Messaging）发送消息。我已经通过Google API注册，我可以从多个Android测试手机向我的网站（这是一个Google App Engine后端）发送一个regID。
但是，我无法通过Google App Engine向GCM发送任何内容。

  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 
 $ b $ header = {'Content-Type'：'application / json '，'Authorization'：myKey} 
 data = urllib.urlencode（json_data）
 data2 = {title：title} 
 data3 = urllib.urlencode（data2）
 
 req = urllib2.Request（url，data，headers）
 
 $ bf = urllib2.urlopen（req）
 response = f.read（）
 f .close（）
 
 logging.debug（*** !!!!!!! WriteEntry TEST ----- Response：+ response）
  
 
 
 
这里是我收到的错误。
  Traceback（最近一次调用最后一次）：
文件/ base / python_runtime / python_lib / versions / 1 / google / appengine / ext / webapp / _webapp25 .py，第703行，在__call__ 
 handler.post（* groups）
文件/base/data/home/apps/s~journaltestza/26.360625174851783344/main.py，第213行，in post 
f = urllib2.urlopen（req）
在urlopen 
中的文件/base/python_runtime/python_dist/lib/python2.5/urllib2.py，第124行返回_opener.open（ url，data）
打开
的文件/base/python_runtime/python_dist/lib/python2.5/urllib2.py，第387行response = meth（req，response）
 File /base/python_runtime/python_dist/lib/python2.5/urllib2.py，第498行，在http_response 
'http'，请求，响应，代码，味精，hdrs）
文件/ base /python_runtime/python_dist/lib/python2.5/urllib2.py，第425行，错误
返回self._call_chain（* args）
文件/ base / python_runtime / python_dist / lib / python2。 5 / urllib2.py，第360行，在_call_chain 
中result = func（* args）
在http_error_default 
中的文件/base/python_runtime/python_dist/lib/python2.5/urllib2.py，第506行，引发HTTPError（req.get_full_url（），code ，msg，hdrs，fp）
 HTTPError：HTTP错误400：错误请求
  
谢谢！  
 
解决方案
 data2和data3用于什么目的？您发布的数据不是正确的json，所以您需要使用json.dumps（data）。代码应该是这样的： 
 
 
  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 
 data = json.dumps（json_data）
 headers = {'Content-Type'：'application / json'，'Authorization'： myKey} 
 req = urllib2.Request（url，data，headers）
f = urllib2.urlopen（req）
 response = json.loads（f.read（））
 reply = {} $ b $如果response ['failure'] == 0：
 reply ['error'] ='0'
 else：
 response ['error'] =' 1'
 return HttpResponse（json.dumps（reply），mimetype =application / javascript）
  
 
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.
    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)
And here is the error that I am receiving.
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
Thanks!
解决方案
What are data2 and data3 used for ? The data you are posting was not proper json so you need to use json.dumps(data).Code should be like this :
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
data = json.dumps(json_data)
headers = {'Content-Type': 'application/json', 'Authorization': myKey}
req = urllib2.Request(url, data, headers)
f = urllib2.urlopen(req)
response = json.loads(f.read())
reply = {}
if response ['failure'] == 0:
    reply['error'] = '0'
else:
    response ['error'] = '1'
return HttpResponse(json.dumps(reply), mimetype="application/javascript")


                        
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