/// <summary>
/// 验证签名，检验是否是从微信服务器上发出的请求
/// </summary>
/// <param name="model">请求参数模型 Model</param>
/// <returns>是否验证通过</returns>
private bool CheckSignature(WeChatRequestModel model)
{
string signature, timestamp, nonce, tempStr;
//获取请求来的参数
signature = model.signature;
timestamp = model.timestamp;
nonce = model.nonce;
//创建数组，将 Token, timestamp, nonce 三个参数加入数组
string[] array = { Token, timestamp, nonce };
//进行排序
Array.Sort(array);
//拼接为一个字符串
tempStr = String.Join("", array);
//对字符串进行 SHA1加密
tempStr = Get_SHA1_Method2(tempStr);
//判断signature 是否正确
if (tempStr.Equals(signature))
{
return(true);
}
else
{
return(false);
}
//return true;
}
/// <summary>
/// 整个验证的核心
/// </summary>
/// <param name="model"></param>
//可以给WeChatRequestModel 加东西，比如我加了Code。
//登录的时候我就可以从微信拿到Code
public async Task <GetUser> Valid(WeChatRequestModel model)
{
//获取请求来的 echostr 参数
string echoStr = model.echostr;
//通过验证，出于安全考虑。（也可以跳过）
if (CheckSignature(model))
{
if (!string.IsNullOrEmpty(echoStr))
{
//将随机生成的 echostr 参数 原样输出
await Response.WriteAsync(echoStr);
//截止输出流
//Response.end();
}
}
//解析连接的类
WxPayConfig wxPayConfig = new WxPayConfig();
//通过code换取网页授权access_token
string url = "https://api.weixin.qq.com/sns/oauth2/access_token?appid=" + wxPayConfig.appid + "&secret=" + wxPayConfig.appSecret + "&code=" + model.code + "&grant_type=authorization_code";
HttpClient httpClient = new HttpClient();
var getParameter = await httpClient.GetStringAsync(url); //getHttp.GetJson(url);
//把结果字符串反序列化成List对象。
var parameter = JsonConvert.DeserializeObject <GetToken>(getParameter);
//拉取用户信息
//如果网页授权作用域为snsapi_userinfo，则此时开发者可以通过access_token和openid拉取用户信息了。
string Userurl = "https://api.weixin.qq.com/sns/userinfo?access_token=" + parameter.access_token + "&openid=" + parameter.openid + "&lang=zh_CN";
//获得连接字符串的数据
var getUser = await httpClient.GetStringAsync(Userurl);
//把结果字符串反序列化成List对象。1
var User = JsonConvert.DeserializeObject <GetUser>(getUser);
return(User);
}
public ActionResult Post(WeChatRequestModel model)
{
Stream requestStream = System.Web.HttpContext.Current.Request.InputStream;
byte[] requestByte = new byte[requestStream.Length];
requestStream.Read(requestByte, 0, (int)requestStream.Length);
string requestStr = Encoding.UTF8.GetString(requestByte);
var XML = "";
if (!string.IsNullOrEmpty(requestStr))
{
//封装请求类
var requestDocXml = new XmlDocument();
requestDocXml.LoadXml(requestStr);
var rootElement = requestDocXml.DocumentElement;
if (rootElement == null)
{
return(Content("There is no element!"));
}
var wxXmlModel = new WxXmlModel
{
ToUserName = rootElement.SelectSingleNode("ToUserName").InnerText,
FromUserName = rootElement.SelectSingleNode("FromUserName").InnerText,
CreateTime = rootElement.SelectSingleNode("CreateTime").InnerText,
MsgType = rootElement.SelectSingleNode("MsgType").InnerText
};
switch (wxXmlModel.MsgType)
{
case "Text": //文本
wxXmlModel.Content = rootElement.SelectSingleNode("Content").InnerText;
XML = ResponseMessage.GetText(wxXmlModel.FromUserName, wxXmlModel.ToUserName, wxXmlModel.Content);
break;
case "Image": //图片
wxXmlModel.PicUrl = rootElement.SelectSingleNode("PicUrl").InnerText;
break;
//case "Voice"://语音
// wxXmlModel.PicUrl = rootElement.SelectSingleNode("Media_id").InnerText;
// break;
//case "Video"://视频
// wxXmlModel.PicUrl = rootElement.SelectSingleNode("Media_id").InnerText;
// break;
//case "Shortvideo"://小视频
// wxXmlModel.PicUrl = rootElement.SelectSingleNode("Media_id").InnerText;
// break;
//case "Location"://位置
// wxXmlModel.Location_X = rootElement.SelectSingleNode("Location_X").InnerText;
// wxXmlModel.Location_Y = rootElement.SelectSingleNode("Location_Y").InnerText;
// break;
case "event": //事件
wxXmlModel.Event = rootElement.SelectSingleNode("Event").InnerText;
switch (wxXmlModel.Event)
{
case "subscribe":
if (string.IsNullOrEmpty(wxXmlModel.EventKey))
{
XML = ResponseMessage.GetText(wxXmlModel.FromUserName, wxXmlModel.ToUserName, "关注成功");
}
else
{
XML = ResponseMessage.GetText(wxXmlModel.FromUserName, wxXmlModel.ToUserName, wxXmlModel.EventKey);
}
break;
case "SCAN":
XML = ResponseMessage.ScanQrcode(wxXmlModel.FromUserName, wxXmlModel.ToUserName, wxXmlModel.EventKey); //扫描已关注二维码已关注，直接推送事件
break;
}
if (wxXmlModel.Event != "TEMPLATESENDJOBFINISH") //关注类型
{
wxXmlModel.EventKey = rootElement.SelectSingleNode("EventKey").InnerText;
}
break;
default:
break;
}
}
return(Content(XML));
}
