C#Post方法GetResponse抛出异常后获取状态码和返回的信息
先描述一下问题产生,对接华为云接口时,由于返回请求错误,对方服务器返回400,415,等错误,然而这种异常内包含某些对方返回的信息,普通的如果post方法内未进行Response的异常处理,那么恭喜你,你悲剧了,获取到的信息就是这些“Exception:远程服务器返回错误: (500) 内部服务器错误”。然而这并不是我们想要的,那么就需要对这种情况进行处理了。
public static string HttpPost(string url, string data, Hashtable ht, out int stateCode) { HttpWebRequest httpWebRequest = null; HttpWebResponse httpWebResponse = null; StreamReader streamReader = null; stateCode = 0; try { ServicePointManager.SecurityProtocol = (SecurityProtocolType)192 | (SecurityProtocolType)768 | (SecurityProtocolType)3072; httpWebRequest = (HttpWebRequest)HttpWebRequest.Create(new Uri(url)); byte[] bs = System.Text.Encoding.UTF8.GetBytes(data); httpWebRequest.Method = "POST"; httpWebRequest.ContentType = "application/json;charset=UTF-8;"; httpWebRequest.ContentLength = bs.Length; if (ht != null && ht.Count > 0) { foreach (DictionaryEntry dic in ht) { httpWebRequest.Headers.Add(dic.Key.ToString(), dic.Value.ToString()); } } httpWebRequest.Timeout = 20000; httpWebRequest.GetRequestStream().Write(bs, 0, bs.Length); httpWebResponse = (HttpWebResponse)httpWebRequest.GetResponse(); streamReader = new StreamReader(httpWebResponse.GetResponseStream(), System.Text.Encoding.UTF8); string responseContent = streamReader.ReadToEnd(); stateCode = (int)(httpWebResponse.StatusCode); streamReader.Close(); httpWebResponse.Close(); httpWebRequest.Abort(); return responseContent; } catch (WebException e) { string result = string.Empty; using (WebResponse response = e.Response) { HttpWebResponse httpResponse = (HttpWebResponse)response; stateCode = (int)httpResponse.StatusCode; if (response == null) { return e.ToString(); } using (Stream stream = response.GetResponseStream()) using (var reader = new StreamReader(stream)) { result = reader.ReadToEnd(); } } if (streamReader != null) streamReader.Close(); if (httpWebRequest != null) httpWebRequest.Abort(); if (httpWebResponse != null) httpWebResponse.Close(); return result; } }
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