ServicePointManager.Expect100Continue = true; ServicePointManager.SecurityProtocol = SecurityProtocolType.Tls12 | SecurityProtocolType.Tls11 | SecurityProtocolType.Tls; ServicePointManager.ServerCertificateValidationCallback = (sender, certificate, chain, errors) => true; string postData = "userid=example"; HttpWebRequest request = (HttpWebRequest)WebRequest.Create("https://chatbot.weixin.qq.com/openapi/sign/g8529MURrcxWlejeROtXEvv7lcmjVL"); request.Method = "POST"; request.ContentType = "application/json"; request.ContentLength = postData.Length; using (var streamWriter = new StreamWriter(request.GetRequestStream())) {     streamWriter.Write(postData);     streamWriter.Flush(); } HttpWebResponse response = (HttpWebResponse)request.GetResponse(); using (var streamReader = new StreamReader(response.GetResponseStream())) {     string result = streamReader.ReadToEnd();     context.Response.Write(result); }

post接口地址提示趺域：https://chatbot.weixin.qq.com/openapi/sign/{TOKEN} Access to XMLHttpRequest at 'https://chatbot.weixin.qq.com/openapi/sign/xxxxxx' from origin 'http://sdsdsd.cn' has been blocked by CORS policy: Response to preflight request doesn't pass access control check: No 'Access-Control-Allow-Origin' header is present on the requested resource. https://developers.weixin.qq.com/doc/aispeech/confapi/INTERFACEDOCUMENT.html