BAE+Python+Django+Wechatpy+Baidu weather api +微信订阅号 = 实现微信查询天气

最近想在微信上面实现天气查询，分两个步骤：

1.被动回复：输入天气、xx天气获取天气情况

2.主动推送：每天定时推送天气（针对24小时内产生交互的人）

目前已经实现第一个步骤，如下：

现将实现此功能环节、步骤等整理如下：

前置条件：

1.申请微信订阅号

2.申请百度应用引擎（BAE python环境）

技术知识：

1.python

2.Django

其他知识：

1.HTTP协议

2.JSON

3.WechatPy（Python 微信 SDK）

实现思路：

用户上行文字消息 【XX天气】=>订阅号=>微信客户端=>微信后台=>推送到微信开发者接口=>BAE=>Django（Python）=>WechatPy=>文字解析=>百度天气API

=>协议JSON=>生成文章描述XML=>微信后台=>微信客户端 【页面显示】

实现代码：

百度天气查询【输入地市】：

http://api.map.baidu.com/telematics/v3/weather?location=%s&output=json&ak=YOURAK

 #! /usr/bin/env python
 # coding=utf-8

 import requests
 import json

 class _cityWeather():

     #key
     appkey='7ed5edfdb07013922a47bd2fbf194d3d'
     #url
     appurl='http://api.map.baidu.com/telematics/v3/weather?location=%s&output=json&ak=7ed5edfdb07013922a47bd2fbf194d3d'

     def __init__(self):
         pass

     def getcitynamebyip(self,ip):

         pass

     def getcityweather(self,cityname='合肥'):
         requrl=self.appurl % (cityname,)
         r =  requests.get(requrl)
         return r.text

 cityweather = _cityWeather()    

 if __name__ =="__main__":

     print cityweather.getcityweather('合肥')

Django ：

路由【url.py】：

from django.conf.urls import patterns, include, url

import weixinviews
import robot

urlpatterns = patterns('',

#     url(r'^$', weixinviews.handleRequest),
    url(r'^$', robot.weixin),

)

对接微信&消息分流【robot.py】：

 # -*- coding: utf-8 -*-

 from django.http import HttpResponse
 from django.template import RequestContext, Template
 from django.views.decorators.csrf import csrf_exempt
 from django.utils.encoding import smart_str, smart_unicode

 from wechatpy import parse_message, create_reply
 from wechatpy.utils import check_signature
 from wechatpy.exceptions import InvalidSignatureException
 from wechatpy.replies import BaseReply

 import reply_text
 import reply_event

 TOKEN = 'YOURTOKEN'  # 注意要与微信公众帐号平台上填写一致 

 @csrf_exempt
 def weixin(request):
     if request.method == 'GET':
         signature = request.GET.get('signature', '')
         timestamp = request.GET.get('timestamp', '')
         nonce = request.GET.get('nonce', '')
         echo_str = request.GET.get('echostr', '')
         try:
             check_signature(TOKEN, signature, timestamp, nonce)
         except InvalidSignatureException:
             echo_str = 'error'
         response = HttpResponse(echo_str, content_type="text/plain")
         return response
     else:
         reply=None
         msg = parse_message(request.body)
         if msg.type == 'text':
             reply = reply_text.doreply(msg)
         elif msg.type=='event':
             reply = reply_event.doreply(msg)
         else:
             pass

         if not reply or not isinstance(reply, BaseReply):
             reply = create_reply('暂不支持文本消息外的其他操作...\r\n回复:xx天气 查询地市天气情况', msg)

         response = HttpResponse(reply.render() , content_type="application/xml")
         return response
   

文字消息应答【reply_text.py】：

 # -*- coding: utf-8 -*-

 from wechatpy import parse_message, create_reply
 from wechatpy.replies import TextReply, ArticlesReply
 from wechatpy.utils import check_signature
 from wechatpy.exceptions import InvalidSignatureException

 from webcore.weatherservices import cityweather
 from isay9685.models import CityWeahter
 import json
 import time
 from datetime import datetime

 def doreply(msg):
     reply = None

     try:

         if msg.content[-2:] == u'天气':
             if(len(msg.content) == 2):
                 cityname = '合肥'
             else:
                 cityname = msg.content[:-2]
             reply = replyWeather(cityname, msg)
         else:
             reply = create_reply(repr(msg), msg)

     except Exception as e:
         print 'error:', e

     return reply

 def replyWeather(cityname, msg):

     reply = None

     dateid = time.strftime("%Y%m%d")
     timeid = time.strftime("%H")

     cWeahter = CityWeahter.objects.filter(dateid=dateid, timeid=timeid, cityname=cityname)
     if cWeahter:
         weatherstr = cWeahter[0].wheather
     else:
         weatherstr = cityweather.getcityweather(cityname)
         cw = CityWeahter(dateid=dateid, timeid=timeid, cityname=cityname, wheather=weatherstr, createtime=datetime.now())
         cw.save()

     # weatherstr = '''{"error":0,"status":"success","date":"2015-06-15","results":[{"currentCity":"合肥","pm25":"126","index":[{"title":"穿衣","zs":"热","tipt":"穿衣指数","des":"天气热，建议着短裙、短裤、短薄外套、T恤等夏季服装。"},{"title":"洗车","zs":"不宜","tipt":"洗车指数","des":"不宜洗车，未来24小时内有雨，如果在此期间洗车，雨水和路上的泥水可能会再次弄脏您的爱车。"},{"title":"旅游","zs":"适宜","tipt":"旅游指数","des":"温度适宜，又有较弱降水和微风作伴，会给您的旅行带来意想不到的景象，适宜旅游，可不要错过机会呦！"},{"title":"感冒","zs":"较易发","tipt":"感冒指数","des":"相对今天出现了较大幅度降温，较易发生感冒，体质较弱的朋友请注意适当防护。"},{"title":"运动","zs":"较不宜","tipt":"运动指数","des":"有降水，推荐您在室内进行健身休闲运动；若坚持户外运动，须注意携带雨具并注意避雨防滑。"},{"title":"紫外线强度","zs":"弱","tipt":"紫外线强度指数","des":"紫外线强度较弱，建议出门前涂擦SPF在12-15之间、PA+的防晒护肤品。"}],"weather_data":[{"date":"周一 06月15日 (实时：27℃)","dayPictureUrl":"http://api.map.baidu.com/images/weather/day/xiaoyu.png","nightPictureUrl":"http://api.map.baidu.com/images/weather/night/zhongyu.png","weather":"小雨转中雨","wind":"南风微风","temperature":"28 ~ 22℃"},{"date":"周二","dayPictureUrl":"http://api.map.baidu.com/images/weather/day/dayu.png","nightPictureUrl":"http://api.map.baidu.com/images/weather/night/xiaoyu.png","weather":"大雨转小雨","wind":"北风微风","temperature":"26 ~ 21℃"},{"date":"周三","dayPictureUrl":"http://api.map.baidu.com/images/weather/day/xiaoyu.png","nightPictureUrl":"http://api.map.baidu.com/images/weather/night/yin.png","weather":"小雨转阴","wind":"北风微风","temperature":"24 ~ 20℃"},{"date":"周四","dayPictureUrl":"http://api.map.baidu.com/images/weather/day/duoyun.png","nightPictureUrl":"http://api.map.baidu.com/images/weather/night/duoyun.png","weather":"多云","wind":"东北风3-4级","temperature":"28 ~ 20℃"}]}]} '''
     weatherjson = json.loads(weatherstr)

     if weatherjson and weatherjson.get('error') == 0:
         date = weatherjson.get('date')
         result = weatherjson.get('results')[0]

         currentCity = result.get('currentCity')
         pm25 = result.get('pm25')

         wheathernowdatas = result.get('weather_data')[0]

         weathermsg = repr(wheathernowdatas)

         reply = ArticlesReply(message=msg)

         # simply use dict as article
         reply.add_article({
             'title': wheathernowdatas.get('date'),
         })
         reply.add_article({
             'title':
              u'%s %s %s' % (wheathernowdatas.get('weather') , wheathernowdatas.get('temperature') , wheathernowdatas.get('wind')) \
              + '\r\n'\
              + '\r\n'\
              + currentCity + u' PM2.5: ' + pm25  ,
             'url': 'http://isay9685.duapp.com'
         })
         reply.add_article({
             'title':  u'白天',
             'image': wheathernowdatas.get('dayPictureUrl'),
         })
         reply.add_article({
             'title':  u'晚上',
             'image': wheathernowdatas.get('nightPictureUrl'),
         })

     return reply

事件消息应答【reply_event.py】：

 # -*- coding: utf-8 -*-

 from wechatpy import parse_message, create_reply
 from wechatpy.replies import TextReply, ArticlesReply
 from wechatpy.utils import check_signature
 from wechatpy.exceptions import InvalidSignatureException

 from webcore.weatherservices import cityweather
 from isay9685.models import CityWeahter
 import json
 import time
 from datetime import datetime

 def doreply(msg):
     reply = None

     try:

         if msg.event == 'subscribe':
             reply = replySubscribe(msg)
         else:
             reply = create_reply(repr(msg), msg)

     except Exception as e:
         print 'error:', e
         reply = None

     return reply

 def replySubscribe(msg):

      reply = TextReply(content='欢迎关注RYHAN的微信订阅号，回复XX天气即可查询天气情况。\r\n 如：合肥天气', message=msg)
      return reply

BAE【requirements.txt】

 django==1.5.2
 MySQL-python==1.2.4
 requests==2.8.1
 #pycrypto==2.6.1
 PyCrypto
 #cryptography==0.8.2
 wechatpy

测试微信号：