ASP.NETWebAPI实现微信公众平台开发（一）服务器验证

//注意返回echostr字符串类型微信只接受“application/x-www-form-urlencoded”，直接返回是不被接受的 public HttpResponseMessage Get(string signature, string timestamp, string nonce, string echostr) { if (CheckSource(signature, timestamp, nonce)) { var result = new StringContent(echostr, UTF8Encoding.UTF8, "application/x-www-form-urlencoded"); var response = new HttpResponseMessage { Content = result }; return response; } return new HttpResponseMessage(); } //检验是否来自微信的签名 public bool CheckSource(string signature, string timestamp, string nonce) { var str = string.Empty; var token = "cwtesttoken"; var parameter = new List<string> { token, timestamp, nonce }; parameter.Sort(); var parameterStr = parameter[0] + parameter[1] + parameter[2]; var tempStr = GetSHA1(parameterStr).Replace("-", "").ToLower(); if (tempStr == signature) return true; return false; } //SHA1加密 public string GetSHA1(string input) { var output = string.Empty; var sha1 = new SHA1CryptoServiceProvider(); var inputBytes = UTF8Encoding.UTF8.GetBytes(input); var outputBytes = sha1.ComputeHash(inputBytes); sha1.Clear(); output = BitConverter.ToString(outputBytes); return output; }