From 51dec02187f642d99f1c41e188495d8d9902792f Mon Sep 17 00:00:00 2001
From: John Luo <jt.luo@mail.utoronto.ca>
Date: Wed, 20 Jan 2016 15:15:14 -0800
Subject: [PATCH] Log request and response headers

---
 .../Http/Frame.cs                             | 59 +++++++++++++++++++
 .../Http/FrameOfT.cs                          |  5 ++
 .../Http/FrameRequestHeaders.cs               |  2 +-
 3 files changed, 65 insertions(+), 1 deletion(-)

diff --git a/src/Microsoft.AspNet.Server.Kestrel/Http/Frame.cs b/src/Microsoft.AspNet.Server.Kestrel/Http/Frame.cs
index efbd159c7..ed71e19eb 100644
--- a/src/Microsoft.AspNet.Server.Kestrel/Http/Frame.cs
+++ b/src/Microsoft.AspNet.Server.Kestrel/Http/Frame.cs
@@ -318,6 +318,59 @@ public void Abort()
         /// </summary>
         public abstract Task RequestProcessingAsync();
 
+        public string RequestToString()
+        {
+            var requestBuilder = new StringBuilder("Received request: ");
+
+            // GET /path?query HTTP/1.1
+            requestBuilder.Append(Method);
+            requestBuilder.Append(" ");
+            requestBuilder.Append(PathBase);
+            requestBuilder.Append(Path);
+            requestBuilder.Append(QueryString);
+            requestBuilder.Append(" ");
+            requestBuilder.Append(HttpVersion);
+            requestBuilder.Append("; Headers: { ");
+
+            foreach (var header in RequestHeaders)
+            {
+                foreach (var value in header.Value)
+                {
+                    requestBuilder.Append(header.Key);
+                    requestBuilder.Append(": ");
+                    requestBuilder.Append(value);
+                    requestBuilder.Append("; ");
+                }
+            }
+            requestBuilder.Append("}");
+            return requestBuilder.ToString();
+        }
+
+        public string ResponseToString()
+        {
+            // HTTP/1.1 200 OK
+            var responseBuilder = new StringBuilder("Sending response: ");
+            responseBuilder.Append(HttpVersion);
+            responseBuilder.Append(" ");
+            responseBuilder.Append(StatusCode);
+            responseBuilder.Append(" ");
+            responseBuilder.Append(ReasonPhrase);
+            responseBuilder.Append("; Headers: { ");
+
+            foreach (var header in ResponseHeaders)
+            {
+                foreach (var value in header.Value)
+                {
+                    responseBuilder.Append(header.Key);
+                    responseBuilder.Append(": ");
+                    responseBuilder.Append(value);
+                    responseBuilder.Append("; ");
+                }
+            }
+            responseBuilder.Append("}");
+            return responseBuilder.ToString();
+        }
+
         public void OnStarting(Func<object, Task> callback, object state)
         {
             lock (_onStartingSync)
@@ -655,6 +708,12 @@ private Task CreateResponseHeader(
 
             end.CopyFrom(_httpVersion == HttpVersionType.Http1_1 ? _bytesHttpVersion1_1 : _bytesHttpVersion1_0);
             end.CopyFrom(statusBytes);
+
+            if (Log.IsEnabled(LogLevel.Debug))
+            {
+                Log.LogDebug(ResponseToString());
+            }
+
             _responseHeaders.CopyTo(ref end);
             end.CopyFrom(_bytesEndHeaders, 0, _bytesEndHeaders.Length);
 
diff --git a/src/Microsoft.AspNet.Server.Kestrel/Http/FrameOfT.cs b/src/Microsoft.AspNet.Server.Kestrel/Http/FrameOfT.cs
index 32b067fc7..723b7b415 100644
--- a/src/Microsoft.AspNet.Server.Kestrel/Http/FrameOfT.cs
+++ b/src/Microsoft.AspNet.Server.Kestrel/Http/FrameOfT.cs
@@ -62,6 +62,11 @@ public override async Task RequestProcessingAsync()
 
                     if (!_requestProcessingStopping)
                     {
+                        if (Log.IsEnabled(LogLevel.Debug))
+                        {
+                            Log.LogDebug(RequestToString());
+                        }
+
                         var messageBody = MessageBody.For(HttpVersion, _requestHeaders, this);
                         _keepAlive = messageBody.RequestKeepAlive;
 
diff --git a/src/Microsoft.AspNet.Server.Kestrel/Http/FrameRequestHeaders.cs b/src/Microsoft.AspNet.Server.Kestrel/Http/FrameRequestHeaders.cs
index 731b44946..3144c376f 100644
--- a/src/Microsoft.AspNet.Server.Kestrel/Http/FrameRequestHeaders.cs
+++ b/src/Microsoft.AspNet.Server.Kestrel/Http/FrameRequestHeaders.cs
@@ -1,9 +1,9 @@
 // Copyright (c) .NET Foundation. All rights reserved.
 // Licensed under the Apache License, Version 2.0. See License.txt in the project root for license information.
 
-using Microsoft.Extensions.Primitives;
 using System.Collections;
 using System.Collections.Generic;
+using Microsoft.Extensions.Primitives;
 
 namespace Microsoft.AspNet.Server.Kestrel.Http
 {