#coding:utf8

import urllib2

import urllib

import json

import string

import random

class WebChat(object):

    def __init__(self, appid=None, secret=None, code=None):

        self.appid = appid

        self.secret = secret

        self.code = code

    def token_url(self):

        return "https://api.weixin.qq.com/cgi-bin/token?grant_type=client_credential&appid=%s&secret=%s"

               % (self.appid, self.secret)

    def get_access_token(self):

        access_token_url = self.token_url()

        f = urllib2.urlopen(access_token_url)

        json_string = f.read()

        return json.loads(json_string)['access_token']

    def get_ticket_url(self):

        access_token = self.get_access_token()

        url = "https://api.weixin.qq.com/cgi-bin/qrcode/create?access_token=%s" %(access_token)

        return url

    def get_ticket(self):

    	body={

                "action_name": "QR_LIMIT_SCENE",

                "action_info": {

                "product_id":'d442kdD',

                "scene": {

                        "scene_id": 1444

                        }

                                }

                }

        jsons = json.dumps(body)

        ticket_url = self.get_ticket_url()

        ret = urllib2.Request(ticket_url,jsons)

        result_string = urllib2.urlopen(ret).read()

        return json.loads(result_string)['ticket']

    def exchange_by_ticket(self):

        ticket = self.get_ticket()

        exchange_by_ticket_url = "https://mp.weixin.qq.com/cgi-bin/showqrcode?ticket=%s" % (ticket)

        return exchange_by_ticket_url

    def qrcode_name(self):

	    allw = string.letters+string.digits

	    r = []

	    for i in range(6):

	        r.append(random.choice(allw))

	    return ''.join(r) 

    def get_qrcode_by_url(self):

    	url = self.exchange_by_ticket()

    	ret = urllib2.urlopen(url).read()

    	name = self.qrcode_name()

    	with open(name+'.jpg','wb') as f:

    		f.write(ret)

    	return 1

if __name__ =='__main__':

    web_chat = WebChat('XXXX','XXXX')

    result = web_chat.get_qrcode_by_url()

    print result