Dotnet Core Intercept HTTP Requests - gecko-8/devwiki GitHub Wiki

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1. Add a LoggingHandler class (can be named anything you want)

   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;
       }
   }
   

2. Add it as middleware to your HttpClient. E.g.

   HttpClient client = new HttpClient(new LoggingHandler(new HttpClientHandler()));
   var response = await _httpClient.SendAsync(request);