微信公衆號掃碼關注並回覆信息

1 接收微信 服務器get 請求發過來的參數

@csrf_exempt
def weixin_main(request):
    # get 請求是驗證
    if request.method == "GET":
        # 接收微信服務器get請求發過來的參數
        signature = request.GET.get('signature', None)
        timestamp = request.GET.get('timestamp', None)
        nonce = request.GET.get('nonce', None)
        echostr = request.GET.get('echostr', None)
        # 服務器配置中的token
        token = 'gongchang'
        # 把參數放到list中排序後合成一個字符串，再用sha1加密得到新的字符串與微信發來的signature對比，如果相同就返回echostr給服務器，校驗通過
        hashlist = [token, timestamp, nonce]
        hashlist.sort()
        hashstr = ''.join([s for s in hashlist])
        hashstr = hashlib.sha1(hashstr).hexdigest()
        if hashstr == signature:
            return HttpResponse(echostr)
        else:
            return HttpResponse("field")

    elif request.method == "POST":
        webData = request.body
        xmlData = ET.fromstring(webData)
        msg_type = xmlData.find('MsgType').text
        to_user_name = xmlData.find('ToUserName').text
        from_user_name = xmlData.find('FromUserName').text
        creat_time = xmlData.find('CreateTime').text
        info = Config.objects.get(config_name='shovel_free')
        data = info.config_value
        data = json.loads(data)
        wx_num = data.get('wx_num')
        now = time.strftime('%Y%m%d')
                if msg_type == 'event':
            event = xmlData.find('Event').text
            # 關注事件
            if event == 'subscribe':
                eventkey = xmlData.find('EventKey').text  # qrscene_14 爲關注數據形式
                # 獲取access_token
                # 微信公共號返回二種信息流 1未關注    qrscene_6  2 已關注 不發送  qrscene_data_123

                try:
                    eventkey = int(eventkey[8:].encode("utf-8"))
                except:
                    try:
                        eventkey = str(eventkey[13:].encode("utf-8"))
                        reply_info = "提取碼爲：%s" % eventkey
                        replyMsg = TextMsg(from_user_name, to_user_name, reply_info)
                        return HttpResponse(replyMsg.send())
                    except:
                        # 用戶關注時，自動推送信息
                        content = "終於等到你~感謝關注！  ❤\n我們爲你提供海量關鍵詞的快速挖掘與智能導出服務，同時還可對關鍵詞進行統一管理，" \
                          "便於使用。\n在這裏，你可以享受：\n挖詞進度即時通知，挖詞結果一鍵查詢，還可免費領鏟子哦！\n" \
                          "第一時間告訴你最新的優惠福利，做你最貼心的挖詞小助手。\n回覆【免費領鏟子】，即可每天免費領取%s把鏟子，"  \
                          "快來試一下吧" % wx_num

                        replyMsg = TextMsg(from_user_name, to_user_name, content)
                        return HttpResponse(replyMsg.send())

                # 統一獲取微信公共號
                access_token = get_access_token()
                if access_token:
                    # 獲取微信用戶的基本信息
                    user_info_url = u'https://api.weixin.qq.com/cgi-bin/user/info'
                    params = {
                        'access_token': access_token,
                        'openid': from_user_name,
                        'lang': settings.WEIXIN_APPSECRET_TT,
                    }
                    try:
                        userinfo = requests.get(user_info_url, params=params).json()
                        nickname = userinfo['nickname']
                        try:
                            user_wx_info = UserWxInfo.objects.get(openid=from_user_name, uid=eventkey)
                            user_wx_info.wx_username = nickname
                            user_wx_info.focus_state = 1
                            user_wx_info.save()
                        except:
                            # 兩種情況 1.微信公共號未被使用 2. 重新綁定新用戶，老用戶解除綁定
                            try:
                                user_wx_info = UserWxInfo.objects.get(openid=from_user_name)
                                user_wx_info.openid = ''
                                user_wx_info.focus_state = 0
                                user_wx_info.save()
                            except:
                                pass
                            try:
                                user_wx_info = UserWxInfo.objects.get(uid=int(eventkey))
                                user_wx_info.openid = from_user_name
                                user_wx_info.wx_username = nickname
                                user_wx_info.focus_state = 1
                                user_wx_info.save()
                            except:
                                user_com = UserWxInfo(uid=eventkey, openid=from_user_name, wx_username=nickname,
                                                      focus_state=1, focus_state_done=1)
                                user_com.save()

                                # 用戶賬戶表鏟子變動更新
                                try:
                                    _ = FinanceAccount.objects.get(uid=eventkey)

                                except Exception as e:
                                    pass
                                else:
                                    _.shovel = int(5) + _.shovel  # 鏟子數量保存
                                    _.save()

                                shovel_obj = FinanceAccount.objects.get(uid=eventkey)
                                # 產自明細表
                                data = FinanceShovelLog(uid=eventkey, incr_num=5, reason='獎勵', type=2,
                                                        reason_meta='首次關注微信公衆號', shovel=shovel_obj.shovel)
                                data.save()

                    except:
                        # 微信公共號獲取出現錯誤不做任何處理
                        # raise FieldError("openid", "獲取openid錯誤")
                        pass
                # 用戶關注時，自動推送信息
                content = "終於等到你~感謝關注！  ❤\n我們爲你提供海量關鍵詞的快速挖掘與智能導出服務，同時還可對關鍵詞進行統一管理，" \
                          "便於使用。\n在這裏，你可以享受：\n挖詞進度即時通知，挖詞結果一鍵查詢，還可免費領鏟子哦！\n" \
                          "第一時間告訴你最新的優惠福利，做你最貼心的挖詞小助手。\n回覆【免費領鏟子】，即可每天免費領取%s把鏟子，" \
                          "快來試一下吧" % wx_num

                replyMsg = TextMsg(from_user_name, to_user_name, content)
                return HttpResponse(replyMsg.send())