C# winfrom 调用rest返回错误后，如何获得body信息？

[独醒子]

C#调用rest代码如下，使用正常。
但问题是当服务器返回错误（自定义错误）时候，如何获取body内的错误信息？
因无法获得 HttpWebResponse response 对象，就无法获得body信息。
烦请高人帮助修改。

public bool GetHttpsRequestStr(string sFunName, string sMethod, string sRequestData)
        {
            try
            {
                retJsonStr = "";
                retErrMsg = "";
                Uri address = new Uri("https://" + httpIP + ":" + httpPort.ToString() + "/" + sFunName);

                StringBuilder content = new StringBuilder();
                ServicePointManager.ServerCertificateValidationCallback = new System.Net.Security.RemoteCertificateValidationCallback(CheckValidationResult);
                // 与指定URL创建HTTP请求
                //HttpWebRequest request = (HttpWebRequest)WebRequest.Create("https://" + httpIP  + Url + sFunName);
                HttpWebRequest request = WebRequest.Create(address) as HttpWebRequest;
                //创建证书文件
                X509Certificate objx509 = new X509Certificate(https_crt);
                //添加到请求里
                request.ClientCertificates.Add(objx509);

                string usernamePassword = username + ":" + password;
                CredentialCache mycache = new CredentialCache();
                mycache.Add(address, "Basic", new NetworkCredential(username, password));
                request.Credentials = mycache;



                //Header验证数据
                request.Referer = header_Referer;
                request.Headers.Add("Authorization", "Basic " + Convert.ToBase64String(new ASCIIEncoding().GetBytes(usernamePassword)));
                request.Headers["x-Site-ID"] = header_x_Site_ID;
                request.Headers["x-Terminal-ID"] = header_x_Terminal_ID;
                request.Headers["x-Signature"] = header_x_Signature;
                request.UserAgent = "User-Agent:Mozilla/5.0 (Windows NT 5.1) AppleWebKit/535.1 (KHTML, like Gecko) Chrome/14.0.835.202 Safari/535.1";
                request.KeepAlive = true;
                request.Method = sMethod;
                request.ContentType = ContentType;

                //发送body数据
                if (sRequestData.Trim() != "")
                {
                    byte[] byteData = UTF8Encoding.UTF8.GetBytes(sRequestData);
                    request.ContentLength = byteData.Length;
                    using (Stream postStream = request.GetRequestStream())
                    {
                        postStream.Write(byteData, 0, byteData.Length);
                    }
                }

                //获得请求返回  
                using (HttpWebResponse response = request.GetResponse() as HttpWebResponse)
                {
                    StreamReader reader = new StreamReader(response.GetResponseStream());
                    retJsonStr = reader.ReadToEnd();
                    return true;
                }

            }
            catch (Exception ex)
            {
                retErrMsg=ex.Message.ToString();
                return false;
            }
        }

firefox的rest工具显示的错误

错误后body的内容。

[独醒子]

HttpWebResponse response = request.GetResponse() 这里返回错误，此错误是http请求返回的错误，有些是自定义错误，比如550 会返回一些自定义消息的body需要获取。 catch (WebException webex)//404，500等getresponse时会异常 { response = (HttpWebResponse)webex.Response; if (response != null) retErrMsg=response.StatusCode.ToString(); return false; } 或者用这个错误处理 但如何获得 response里的body呢？

[xdashewan]

我记得好像有些是放在异常的InnerException里，你可以断点在异常上打开异常的对象查看下

[xdashewan]

你先得搞清楚错误是已什么形式返回你的，用数据方式的话就和正常返回值一样获取，如果是异常，那就要从异常里找

[zijiang001]

reader.ReadToEnd(); 就是