How to POST JSON data with Python Requests

Question

I need to POST a JSON from a client to a server  I m using Python 2 7 1 and simplejson  The client is using Requests  The server is CherryPy  I can GET a hard-coded JSON from the server  code not shown   but when I try to POST a JSON to the server  I get  400 Bad Request    Here is my client code   data     sender      Alice        receiver    Bob        message     We did it    data json   simplejson dumps data  payload     json payload   data json  r   requests post  http   localhost 8080   data payload    Here is the server code   class Root object        def   init   self  content           self content   content         print self content    this works      exposed   True      def GET self           cherrypy response headers  Content-Type      application json          return simplejson dumps self content       def POST self           self content   simplejson loads cherrypy request body read      Any ideas

User · Answer

The better way is  url    quot http   xxx xxxx xx quot  data          quot cardno quot    quot 6248889874650987 quot        quot systemIdentify quot    quot s08 quot        quot sourceChannel quot   12   resp   requests post url  json data

User · Answer

It turns out I was missing the header information  The following works   url    http   localhost 8080  data     sender    Alice    receiver    Bob    message    We did it    headers     Content-type    application json    Accept    text plain   r   requests post url  data json dumps data   headers headers

User · Answer

Works perfectly with python 3 5   client   import requests data     sender      Alice        receiver    Bob        message     We did it    r   requests post  http   localhost 8080   json   json payload   data     server   class Root object        def   init   self  content           self content   content         print self content    this works      exposed   True      def GET self           cherrypy response headers  Content-Type      application json          return simplejson dumps self content        cherrypy tools json in        cherrypy tools json out       def POST self           self content   cherrypy request json         return   status    success    message    updated

User · Answer

Which parameter between  data   json   files  should be used it s actually depends on a request header named ContentType usually check this through developer tools of your browser    when the Content-Type is application x-www-form-urlencoded  code should be   requests post url  data jsonObj    when the Content-Type is application json  your code is supposed to be one of below   requests post url  json jsonObj    requests post url  data jsonstr  headers   Content-Type   application json      when the Content-Type is multipart form-data  it s used to upload files  so your code should be   requests post url  files xxxx

User · Answer

Starting with Requests version 2 4 2  you can use the json  parameter  which takes a dictionary  instead of data   which takes a string  in the call   gt  gt  gt  import requests  gt  gt  gt  r   requests post  http   httpbin org post   json   quot key quot    quot value quot     gt  gt  gt  r status code 200  gt  gt  gt  r json     args         data      quot key quot    quot value quot       files         form         headers     Accept                        Accept-Encoding    gzip  deflate                 Connection    close                 Content-Length    16                 Content-Type    application json                 Host    httpbin org                 User-Agent    python-requests 2 4 3 CPython 3 4 0                 X-Request-Id    xx-xx-xx      json     key    value      origin    x x x x     url    http   httpbin org post

User · Answer

From requests 2 4 2  https   pypi python org pypi requests   the  json  parameter is supported  No need to specify  Content-Type   So the shorter version   requests post  http   httpbin org post   json   test    cheers

[python] How to POST JSON data with Python Requests?

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