How to write a web server to handle post (content-type is application/json) in python?

Here comes the detail:

We want to write a web server in Python v2.6.5, and have finished the do_GET method.

But I don't know how to write the do_POST() method.

If the post request goes like the following:

POST /employee/111 HT开发者_JAVA技巧TP/1.1
Content-Type: application/json
Content-Length: XX

{"name": "John"}

How to get the JSON data {"name": "John"} in do_POST() method? (prefer standard library)

It'd be greatly appreciated if you can eloborate why and give a sample.

Thank you!

Use the cgi.FieldStorage class to to handle the data as a form-data avaiable from the POST.. And when you go the portion which is the body of the POST and which in your case is in json format.

def do_POST(self):
    # Parse the form data posted
    form = cgi.FieldStorage(
        fp=self.rfile, 
        headers=self.headers,
        environ={'REQUEST_METHOD':'POST',
                 'CONTENT_TYPE':self.headers['Content-Type'],
                 })

Here is an example illustrating how to do that

And if the content is a proper json, use the json module from the standard library to load to json format and you can deal with it further.

>>> import json
>>> s = '{"name": "john"}'
>>> d = json.loads(s)

In your post, the element {"name": "John"} is just a string that needs to be json parsed. So first import the json module and then do json.load.

import json
post_json_data = json.loads('{"name": "John"}')

To detect where the json data starts you just need to read up to the first {, everything from there should be part of the json data.