Configure .net core logging to log request and response

Question

I'm developing asp .net core 2.1 WEB-API application.

I use ILogger with configuration:

"Logging": { "LogLevel": { "Default": "Debug", "System": "Information", "Microsoft": "Information" }

And on request i see log:

info: Microsoft.AspNetCore.Mvc.Internal.ControllerActionInvoker[1] Executing action method ActivationService.Controllers.ActivationController.Post (ActivationService) with arguments (ActivationService.Contracts.ActivationRequest) - Validation state: Valid

and

Executed action method ActivationService.Controllers.ActivationController.Post (ActivationService), returned result Microsoft.AspNetCore.Mvc.ObjectResult in 174605.9201ms.

Is there way to confugure asp.net to log with trace body of response and request?

Alex Riabov · Accepted Answer · 2018-07-12 16:15:18Z

Yes, you can implement logging middleware:

public class RequestResponseLoggingMiddleware { private readonly RequestDelegate next; private readonly ILogger logger; public RequestResponseLoggingMiddleware(RequestDelegate next, ILoggerFactory loggerFactory) { this.next = next; logger = loggerFactory.CreateLogger<RequestResponseLoggingMiddleware>(); } public async Task Invoke(HttpContext context) { context.Request.EnableRewind(); var buffer = new byte[Convert.ToInt32(context.Request.ContentLength)]; await context.Request.Body.ReadAsync(buffer, 0, buffer.Length); var requestBody = Encoding.UTF8.GetString(buffer); context.Request.Body.Seek(0, SeekOrigin.Begin); logger.LogInformation(requestBody); var originalBodyStream = context.Response.Body; using (var responseBody = new MemoryStream()) { context.Response.Body = responseBody; await next(context); context.Response.Body.Seek(0, SeekOrigin.Begin); var response = await new StreamReader(context.Response.Body).ReadToEndAsync(); context.Response.Body.Seek(0, SeekOrigin.Begin); logger.LogInformation(response); await responseBody.CopyToAsync(originalBodyStream); } } }

And then add it to application Builder in Configure method:

public void Configure(IApplicationBuilder app, IHostingEnvironment env) { .... app.UseMiddleware<RequestResponseLoggingMiddleware>(); }

1) in your example i have to change from "context.Request.Body = body;" to "context.Request.Body.Position = 0;", otherwise request came null in controller 2) it's ok, and may be i'll use it. But may be there is a way to configure standard asp logger to do it?
@TimurLemeshko, unfortunately, there is no way to configure logger to do that.
Will not work with Transfer-Encoding: chunked as Content-Length header is omitted, so context.Request.ContentLength is unavailable. EnableBuffering extension is possible workaround. learn.microsoft.com/en-us/dotnet/api/…
EnableRewind is the method from Internal Asp net namespace and AFAIU it isn't guaranteed that it will work publicly. For instance, I get an error System.TypeLoadException: Could not load type 'Microsoft.AspNetCore.Http.Internal.BufferingHelper' from assembly 'Microsoft.AspNetCore.Http...' I would suggest to use "EnableBuffering()" which has the same meaning: "Ensure the request Body can be read multiple times."

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