如何读取 HttpWebRequest.GetResponse 引发 WebException 时返回的自定义错误消息? [英] How do I read a custom error message returned when HttpWebRequest.GetResponse throws a WebException?
本文介绍了如何读取 HttpWebRequest.GetResponse 引发 WebException 时返回的自定义错误消息?的处理方法,对大家解决问题具有一定的参考价值,需要的朋友们下面随着小编来一起学习吧!
问题描述
我有一个带有简单测试方法的 NET.Core API:
I've a NET.Core API with simple test method:
public async Task<IActionResult> TestApi()
{
try
{
throw new UnauthorizedAccessException("My custom error");
return Ok();
}
catch (UnauthorizedAccessException ex)
{
return StatusCode(401,ex.Message);
}
catch (Exception ex)
{
throw;
}
}
我需要像这样从客户端检索消息:
I need to retrieve the message from a client like this:
var request = WebRequest.Create($"{baseUrl}{url}") as HttpWebRequest;
request.Method = "POST";
request.ContentType = "application/json";
request.Expect = "application/json";
request.ContentLength = 0;
if (parameters != null)
{
request.ContentLength = serializedObject.Length;
using (var writer = new StreamWriter(request.GetRequestStream()))
{
writer.Write(serializedObject);
}
}
var response = request.GetResponse() as HttpWebResponse;
var responseEncoding = Encoding.GetEncoding(response.CharacterSet);
using (var sr = new StreamReader(response.GetResponseStream(), responseEncoding))
{
var result = sr.ReadToEnd();
return JsonConvert.DeserializeObject<T>(result);
}
现在 request.GetResponse() as HttpWebResponse
返回我:
The remote server returned an error: (401) Unauthorized.
而不是我的自定义错误
.有人能指出我正确的方向吗?
instead of My custom error
. Can someone point me in the right direction?
推荐答案
这里有一个精简的示例,可以读取您的自定义消息.您的消息将在响应流中返回.
Here's a pared-down example which reads your custom message. Your message is returned in the response stream.
try
{
var response = request.GetResponse() as HttpWebResponse;
}
catch (WebException ex) // this exception is thrown because of the 401.
{
var responseStream = ex.Response.GetResponseStream();
using (var reader = new StreamReader(responseStream))
{
var message = reader.ReadToEnd();
}
}
这篇关于如何读取 HttpWebRequest.GetResponse 引发 WebException 时返回的自定义错误消息?的文章就介绍到这了,希望我们推荐的答案对大家有所帮助,也希望大家多多支持IT屋!
查看全文