#!/usr/bin/env python
#encoding:utf-8

import cgi
import urlparse
import json
import os

class JSONFieldStorage(cgi.FieldStorage, object):
"""
FieldStorage类的改写，使其具有接收json的能力
 """
    def read_urlencoded(self):
        """Internal: read data in query string format."""
        qs = self.fp.read(self.length)
        try:
            self._json = json.loads(qs)
        except Exception, e:
            self._json = None
        if self._json == None:
            try:
                self._json = json.loads(self.qs_on_post)
            except:
                self._json = None
        if self.qs_on_post:
            qs += '&' + self.qs_on_post
        self.list = list = []
        for key, value in urlparse.parse_qsl(qs, self.keep_blank_values,
                                           self.strict_parsing):
            list.append(cgi.MiniFieldStorage(key, value))
        self.skip_lines()
    def getJson(self):
        try:
            return self._json
        except:
            return None