HttpClient 사용시 요청 / 응답 메시지 로깅

HttpClient 사용시 요청 / 응답 메시지 로깅

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다음과 같은 POST를 수행하는 방법이 있습니다.

var response = await client.PostAsJsonAsync(url, entity);

if (response.IsSuccessStatusCode)
{
        // read the response as strongly typed object
        return await response.Content.ReadAsAsync<T>();
}

내 질문은 엔티티 객체에서 게시 된 실제 JSON을 어떻게 얻을 수 있는지입니다. POSTED가 된 JSON을 기록하고 싶으므로 json을 직접 직렬화하지 않아도 좋을 것입니다.

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이를 수행하는 방법의 예 :

몇 가지 참고 사항 :

• LoggingHandlerHttpClientHandler최종적으로 와이어에 쓰는 요청을 처리하기 전에 요청을 가로 챕니다 .

• PostAsJsonAsync확장은 내부적으로를 생성하고 에서 호출 ObjectContent되면 내부 포맷터 가 객체를 직렬화하게하므로 json에서 콘텐츠를 보는 이유입니다.ReadAsStringAsync()LoggingHandlerObjectContent

로깅 핸들러 :

public class LoggingHandler : DelegatingHandler
{
    public LoggingHandler(HttpMessageHandler innerHandler)
        : base(innerHandler)
    {
    }

    protected override async Task<HttpResponseMessage> SendAsync(HttpRequestMessage request, CancellationToken cancellationToken)
    {
        Console.WriteLine("Request:");
        Console.WriteLine(request.ToString());
        if (request.Content != null)
        {
            Console.WriteLine(await request.Content.ReadAsStringAsync());
        }
        Console.WriteLine();

        HttpResponseMessage response = await base.SendAsync(request, cancellationToken);

        Console.WriteLine("Response:");
        Console.WriteLine(response.ToString());
        if (response.Content != null)
        {
            Console.WriteLine(await response.Content.ReadAsStringAsync());
        }
        Console.WriteLine();

        return response;
    }
}

위의 LoggingHandler를 HttpClient로 연결하십시오 .

HttpClient client = new HttpClient(new LoggingHandler(new HttpClientHandler()));
HttpResponseMessage response = client.PostAsJsonAsync(baseAddress + "/api/values", "Hello, World!").Result;

산출:

Request:
Method: POST, RequestUri: 'http://kirandesktop:9095/api/values', Version: 1.1, Content: System.Net.Http.ObjectContent`1[
[System.String, mscorlib, Version=4.0.0.0, Culture=neutral, PublicKeyToken=b77a5c561934e089]], Headers:
{
  Content-Type: application/json; charset=utf-8
}
"Hello, World!"

Response:
StatusCode: 200, ReasonPhrase: 'OK', Version: 1.1, Content: System.Net.Http.StreamContent, Headers:
{
  Date: Fri, 20 Sep 2013 20:21:26 GMT
  Server: Microsoft-HTTPAPI/2.0
  Content-Length: 15
  Content-Type: application/json; charset=utf-8
}
"Hello, World!"

---

See http://mikehadlow.blogspot.com/2012/07/tracing-systemnet-to-debug-http-clients.html

To configure a System.Net listener to output to both the console and a log file, add the following to your assembly configuration file:

<system.diagnostics>
  <trace autoflush="true" />
  <sources>
    <source name="System.Net">
      <listeners>
        <add name="MyTraceFile"/>
        <add name="MyConsole"/>
      </listeners>
    </source>
  </sources>
  <sharedListeners>
    <add
      name="MyTraceFile"
      type="System.Diagnostics.TextWriterTraceListener"
      initializeData="System.Net.trace.log" />
    <add name="MyConsole" type="System.Diagnostics.ConsoleTraceListener" />
  </sharedListeners>
  <switches>
    <add name="System.Net" value="Verbose" />
  </switches>
</system.diagnostics>

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Network tracing also available for next objects (see article on msdn)

• System.Net.Sockets Some public methods of the Socket, TcpListener, TcpClient, and Dns classes
• System.Net Some public methods of the HttpWebRequest, HttpWebResponse, FtpWebRequest, and FtpWebResponse classes, and SSL debug information (invalid certificates, missing issuers list, and client certificate errors.)
• System.Net.HttpListener Some public methods of the HttpListener, HttpListenerRequest, and HttpListenerResponse classes.
• System.Net.Cache Some private and internal methods in System.Net.Cache.
• System.Net.Http Some public methods of the HttpClient, DelegatingHandler, HttpClientHandler, HttpMessageHandler, MessageProcessingHandler, and WebRequestHandler classes.
• System.Net.WebSockets.WebSocket Some public methods of the ClientWebSocket and WebSocket classes.

Put next lines of code to the configuration file

<configuration>  
  <system.diagnostics>  
    <sources>  
      <source name="System.Net" tracemode="includehex" maxdatasize="1024">  
        <listeners>  
          <add name="System.Net"/>  
        </listeners>  
      </source>  
      <source name="System.Net.Cache">  
        <listeners>  
          <add name="System.Net"/>  
        </listeners>  
      </source>  
      <source name="System.Net.Http">  
        <listeners>  
          <add name="System.Net"/>  
        </listeners>  
      </source>  
      <source name="System.Net.Sockets">  
        <listeners>  
          <add name="System.Net"/>  
        </listeners>  
      </source>  
      <source name="System.Net.WebSockets">  
        <listeners>  
          <add name="System.Net"/>  
        </listeners>  
      </source>  
    </sources>  
    <switches>  
      <add name="System.Net" value="Verbose"/>  
      <add name="System.Net.Cache" value="Verbose"/>  
      <add name="System.Net.Http" value="Verbose"/>  
      <add name="System.Net.Sockets" value="Verbose"/>  
      <add name="System.Net.WebSockets" value="Verbose"/>  
    </switches>  
    <sharedListeners>  
      <add name="System.Net"  
        type="System.Diagnostics.TextWriterTraceListener"  
        initializeData="network.log"  
      />  
    </sharedListeners>  
    <trace autoflush="true"/>  
  </system.diagnostics>  
</configuration>  

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The easiest solution would be to use Wireshark and trace the HTTP tcp flow.

참고URL : https://stackoverflow.com/questions/18924996/logging-request-response-messages-when-using-httpclient