Python开发微信公众平台的方法详解【基于weixin-knife】

from .weixin import handler as HD
@HD.subscribe
def subscribe(xml):
  return "welcome to brain"
@HD.unsubscribe
def subscribe(xml):
  print "leave"
  return "leave brain"

@HD.text
def text(xml):
  content = xml.Content
  if content == "111":
    return {"Title":"美女", "Description":"比基尼美女", "PicUrl":"http://9smv.com/static/mm/uploads/150411/2-150411115450247.jpg", "Url":"http://9smv.com/beauty/list?category=5"}
  elif content == "222":
    return [
      ["比基尼美女", "比基尼美女", "http://9smv.com/static/mm/uploads/150411/2-150411115450247.jpg", "http://9smv.com/beauty/list?category=5"],
      ["长腿美女", "长腿美女", "http://9smv.com/static/mm/uploads/150506/2-150506111A9648.jpg", "http://9smv.com/beauty/list?category=8"]
    ]
  elif content == "push":
    Helper.send_text_message(xml.FromUserName, "推送消息测试")
    return "push ok"
  return "hello world"

def sns_userinfo_callback(callback=None):
  """网页授权获取用户信息装饰器
  callback(openid, userinfo):
    return user
  """
  def wrap(func):
    @wraps(func)
    def inner(*args, **kwargs):
      request = args[0] #django第一个参数request
      openid = request.COOKIES.get('openid')
      userinfo = None
      if not openid:
        code = request.GET.get("code")
        if not code:
          current = "http://"+ request.get_host() + request.get_full_path()
          return redirect(WeixinHelper.oauth2(current))
        else:
          data = json.loads(WeixinHelper.getAccessTokenByCode(code))
          access_token, openid, refresh_token = data["access_token"], data["openid"], data["refresh_token"]
          #WeixinHelper.refreshAccessToken(refresh_token)
          userinfo = json.loads(WeixinHelper.getSnsapiUserInfo(access_token, openid))
      else:
        ok, openid = Helper.check_cookie(openid)
        if not ok:
          return redirect("/")
      request.openid = openid
      if callable(callback):
        request.user = callback(openid, userinfo)
      response = func(request)
      return response
    return inner
  return wrap
sns_userinfo = sns_userinfo_callback()

@sns_userinfo
def oauth(request):
  """网页授权获取用户信息"""
  resp = HttpResponse(request.openid)
  resp.set_cookie("openid", Helper.sign_cookie(request.openid))
  return resp

@sns_userinfo
def pay(request):
  response = render_to_response("pay.html")
  response.set_cookie("openid", Helper.sign_cookie(request.openid))
  return response
@sns_userinfo
@catch
def paydetail(request):
  """获取支付信息"""
  openid = request.openid
  money = request.POST.get("money") or "0.01"
  money = int(float(money)*100)
  jsApi = JsApi_pub()
  unifiedOrder = UnifiedOrder_pub()
  unifiedOrder.setParameter("openid",openid) #商品描述
  unifiedOrder.setParameter("body","充值测试") #商品描述
  timeStamp = time.time()
  out_trade_no = "{0}{1}".format(WxPayConf_pub.APPID, int(timeStamp*100))
  unifiedOrder.setParameter("out_trade_no", out_trade_no) #商户订单号
  unifiedOrder.setParameter("total_fee", str(money)) #总金额
  unifiedOrder.setParameter("notify_url", WxPayConf_pub.NOTIFY_URL) #通知地址
  unifiedOrder.setParameter("trade_type", "JSAPI") #交易类型
  unifiedOrder.setParameter("attach", "6666") #附件数据，可分辨不同商家(string(127))
  try:
    prepay_id = unifiedOrder.getPrepayId()
    jsApi.setPrepayId(prepay_id)
    jsApiParameters = jsApi.getParameters()
  except Exception as e:
    print(e)
  else:
    print jsApiParameters
    return HttpResponse(jsApiParameters)
FAIL, SUCCESS = "FAIL", "SUCCESS"
@catch
def payback(request):
  """支付回调"""
  xml = request.raw_post_data
  #使用通用通知接口
  notify = Notify_pub()
  notify.saveData(xml)
  print xml
  #验证签名，并回应微信。
  #对后台通知交互时，如果微信收到商户的应答不是成功或超时，微信认为通知失败，
  #微信会通过一定的策略（如30分钟共8次）定期重新发起通知，
  #尽可能提高通知的成功率，但微信不保证通知最终能成功
  if not notify.checkSign():
    notify.setReturnParameter("return_code", FAIL) #返回状态码
    notify.setReturnParameter("return_msg", "签名失败") #返回信息
  else:
    result = notify.getData()
    if result["return_code"] == FAIL:
      notify.setReturnParameter("return_code", FAIL)
      notify.setReturnParameter("return_msg", "通信错误")
    elif result["result_code"] == FAIL:
      notify.setReturnParameter("return_code", FAIL)
      notify.setReturnParameter("return_msg", result["err_code_des"])
    else:
      notify.setReturnParameter("return_code", SUCCESS)
      out_trade_no = result["out_trade_no"] #商户系统的订单号，与请求一致。
      ###检查订单号是否已存在,以及业务代码
  return HttpResponse(notify.returnXml())

$.post("/paydetail",{
  money: $momey
  },function(data){
   if(data){
    var jsonobj = eval('('+data+')');
    WeixinJSBridge.invoke('getBrandWCPayRequest', {
       "appId" : jsonobj.appId, //公众号名称，由商户传入
       "timeStamp" : jsonobj.timeStamp, //时间戳
       "nonceStr" : jsonobj.nonceStr, //随机串
       "package" : jsonobj.package,//扩展包
       "signType" : "MD5", //微信签名方式:1.sha1
       "paySign" : jsonobj.paySign //微信签名
       });
   }
  }
 );

class Helper(object):
  """微信具体逻辑帮组类"""
  @class_property
  def access_token(cls):
    key = "ACCESS_TOKEN"
    token = cache.get(key)
    if not token:
      data = json.loads(WeixinHelper.getAccessToken())
      token, expire = data["access_token"], data["expires_in"]
      cache.set(key, token, expire-300)
    return token
  @class_property
  def jsapi_ticket(cls):
    key = "JSAPI_TICKET"
    ticket = cache.get(key)
    if not ticket:
      data = json.loads(WeixinHelper.getJsapiTicket(cls.access_token))
      ticket, expire = data["ticket"], data["expires_in"]
      cache.set(key, ticket, expire-300)
    return ticket

class class_property(object):
  """ A property can decorator class or instance
  class Foo(object):
    @class_property
    def foo(cls):
      return 42
  print(Foo.foo)
  print(Foo().foo)
  """
  def __init__(self, func, name=None, doc=None):
    self.__name__ = name or func.__name__
    self.__module__ = func.__module__
    self.__doc__ = doc or func.__doc__
    self.func = func
  def __get__(self, obj, type=None):
    value = self.func(type)
    return value