urllib2.HTTPError: HTTP Error 400: Bad Request - Python

Question

I\'m trying to POST using urllib and urllib2 but it keeps giving me this error

    Traceback (most recent call last):
  File \"/Users/BaDRaN/Desktop/untitled tex         


        

Answer 1

My psychic powers suggest you want to send body as a string of json, not as a dictionary that's converted to a string.

body = '{"where" : {"deviceType" : "ios"}, "data" : {"alert" : "vvv"}}'

Notice the use of double-quotes for the json elements.

Answer 2

I suspect your payload is not correctly encoded. Nowhere they say "urlencoded". Try using their own example instead. https://parse.com/docs/rest#push urrlib2 is a rather primitive library - using e.g. requests would be more convenient.

Answer 3

It depends whether the json data is in correct format or not, or the issue is in the header content. Hence the urllib2.HTTPError: HTTP Error 400: Bad Request usually occurs.

A small piece of code below with the basic64 authentication with the headers and the json data for the PUT/POST methods:

import urllib2
import base64
import json
url = 'Your_URL'
auth = 'Basic ' + base64.encodestring('%s:%s' % ('username','password'))[:-1]
content_header = {'Authorization': auth,
                 'Content-Type':'application/json',
                 'Accept':'application/json'}
json_data = YOUR_DATA
request = urllib2.Request(url=url, data=json.dumps(json_data), headers=content_header)
request.get_method = lambda: 'PUT' #If you will not provide this, then it will be POST
response = urllib2.urlopen(request)