Extend SocketsHttpHandler Connection and Request telemetry

src/libraries/System.Net.Http/src/System/Net/Http/HttpTelemetry.cs

@@ -90,16 +90,23 @@ private void RequestFailed(string exceptionMessage)
             WriteEvent(eventId: 3, exceptionMessage);
         }
 
-        [Event(4, Level = EventLevel.Informational)]
-        private void ConnectionEstablished(byte versionMajor, byte versionMinor)
+        [NonEvent]
+        private void ConnectionEstablished(byte versionMajor, byte versionMinor, long connectionId, string scheme, string host, int port, IPEndPoint? remoteEndPoint)
+        {
+            string? socketAddress = remoteEndPoint?.Address?.ToString();
+            ConnectionEstablished(versionMajor, versionMinor, connectionId, scheme, host, port, socketAddress);
+        }
+
+        [Event(4, Level = EventLevel.Informational, Version = 1)]
+        private void ConnectionEstablished(byte versionMajor, byte versionMinor, long connectionId, string scheme, string host, int port, string? socketAddress)
         {
-            WriteEvent(eventId: 4, versionMajor, versionMinor);
+            WriteEvent(eventId: 4, versionMajor, versionMinor, connectionId, scheme, host, port, socketAddress);
         }
 
-        [Event(5, Level = EventLevel.Informational)]
-        private void ConnectionClosed(byte versionMajor, byte versionMinor)
+        [Event(5, Level = EventLevel.Informational, Version = 1)]
+        private void ConnectionClosed(byte versionMajor, byte versionMinor, long connectionId)
         {
-            WriteEvent(eventId: 5, versionMajor, versionMinor);
+            WriteEvent(eventId: 5, versionMajor, versionMinor, connectionId);
         }
 
         [Event(6, Level = EventLevel.Informational)]
@@ -108,10 +115,10 @@ private void RequestLeftQueue(double timeOnQueueMilliseconds, byte versionMajor,
             WriteEvent(eventId: 6, timeOnQueueMilliseconds, versionMajor, versionMinor);
         }
 
-        [Event(7, Level = EventLevel.Informational)]
-        public void RequestHeadersStart()
+        [Event(7, Level = EventLevel.Informational, Version = 1)]
+        public void RequestHeadersStart(long connectionId)
         {
-            WriteEvent(eventId: 7);
+            WriteEvent(eventId: 7, connectionId);
         }
 
         [Event(8, Level = EventLevel.Informational)]
@@ -162,49 +169,55 @@ private void RequestFailedDetailed(string exception)
             WriteEvent(eventId: 15, exception);
         }
 
+        [Event(16, Level = EventLevel.Informational)]
+        public void Redirect(string redirectUri)
+        {
+            WriteEvent(eventId: 16, redirectUri);
+        }
+
         [NonEvent]
-        public void Http11ConnectionEstablished()
+        public void Http11ConnectionEstablished(long connectionId, string scheme, string host, int port, IPEndPoint? remoteEndPoint)
         {
             Interlocked.Increment(ref _openedHttp11Connections);
-            ConnectionEstablished(versionMajor: 1, versionMinor: 1);
+            ConnectionEstablished(versionMajor: 1, versionMinor: 1, connectionId, scheme, host, port, remoteEndPoint);
         }
 
         [NonEvent]
-        public void Http11ConnectionClosed()
+        public void Http11ConnectionClosed(long connectionId)
         {
             long count = Interlocked.Decrement(ref _openedHttp11Connections);
             Debug.Assert(count >= 0);
-            ConnectionClosed(versionMajor: 1, versionMinor: 1);
+            ConnectionClosed(versionMajor: 1, versionMinor: 1, connectionId);
         }
 
         [NonEvent]
-        public void Http20ConnectionEstablished()
+        public void Http20ConnectionEstablished(long connectionId, string scheme, string host, int port, IPEndPoint? remoteEndPoint)
         {
             Interlocked.Increment(ref _openedHttp20Connections);
-            ConnectionEstablished(versionMajor: 2, versionMinor: 0);
+            ConnectionEstablished(versionMajor: 2, versionMinor: 0, connectionId, scheme, host, port, remoteEndPoint);
         }
 
         [NonEvent]
-        public void Http20ConnectionClosed()
+        public void Http20ConnectionClosed(long connectionId)
         {
             long count = Interlocked.Decrement(ref _openedHttp20Connections);
             Debug.Assert(count >= 0);
-            ConnectionClosed(versionMajor: 2, versionMinor: 0);
+            ConnectionClosed(versionMajor: 2, versionMinor: 0, connectionId);
         }
 
         [NonEvent]
-        public void Http30ConnectionEstablished()
+        public void Http30ConnectionEstablished(long connectionId, string scheme, string host, int port, IPEndPoint? remoteEndPoint)
         {
             Interlocked.Increment(ref _openedHttp30Connections);
-            ConnectionEstablished(versionMajor: 3, versionMinor: 0);
+            ConnectionEstablished(versionMajor: 3, versionMinor: 0, connectionId, scheme, host, port, remoteEndPoint);
         }
 
         [NonEvent]
-        public void Http30ConnectionClosed()
+        public void Http30ConnectionClosed(long connectionId)
         {
             long count = Interlocked.Decrement(ref _openedHttp30Connections);
             Debug.Assert(count >= 0);
-            ConnectionClosed(versionMajor: 3, versionMinor: 0);
+            ConnectionClosed(versionMajor: 3, versionMinor: 0, connectionId);
         }
 
         [UnconditionalSuppressMessage("ReflectionAnalysis", "IL2026:RequiresUnreferencedCode",
@@ -293,9 +306,9 @@ private unsafe void WriteEvent(int eventId, double arg1, byte arg2, byte arg3)
         [UnconditionalSuppressMessage("ReflectionAnalysis", "IL2026:RequiresUnreferencedCode",
             Justification = "Parameters to this method are primitive and are trimmer safe")]
         [NonEvent]
-        private unsafe void WriteEvent(int eventId, byte arg1, byte arg2)
+        private unsafe void WriteEvent(int eventId, byte arg1, byte arg2, long arg3)
         {
-            const int NumEventDatas = 2;
+            const int NumEventDatas = 3;
             EventData* descrs = stackalloc EventData[NumEventDatas];
 
             descrs[0] = new EventData
@@ -308,6 +321,67 @@ private unsafe void WriteEvent(int eventId, byte arg1, byte arg2)
                 DataPointer = (IntPtr)(&arg2),
                 Size = sizeof(byte)
             };
+            descrs[2] = new EventData
+            {
+                DataPointer = (IntPtr)(&arg3),
+                Size = sizeof(long)
+            };
+
+            WriteEventCore(eventId, NumEventDatas, descrs);
+        }
+
+        [UnconditionalSuppressMessage("ReflectionAnalysis", "IL2026:RequiresUnreferencedCode",
+           Justification = "Parameters to this method are primitive and are trimmer safe")]
+        [NonEvent]
+        private unsafe void WriteEvent(int eventId, byte arg1, byte arg2, long arg3, string? arg4, string arg5, int arg6, string? arg7)
+        {
+            arg4 ??= "";
+            arg5 ??= "";
+            arg7 ??= "";
+
+            const int NumEventDatas = 7;
+            EventData* descrs = stackalloc EventData[NumEventDatas];
+
+            fixed (char* arg4Ptr = arg4)
+            fixed (char* arg5Ptr = arg5)
+            fixed (char* arg7Ptr = arg7)
+            {
+                descrs[0] = new EventData
+                {
+                    DataPointer = (IntPtr)(&arg1),
+                    Size = sizeof(byte)
+                };
+                descrs[1] = new EventData
+                {
+                    DataPointer = (IntPtr)(&arg2),
+                    Size = sizeof(byte)
+                };
+                descrs[2] = new EventData
+                {
+                    DataPointer = (IntPtr)(&arg3),
+                    Size = sizeof(long)
+                };
+                descrs[3] = new EventData
+                {
+                    DataPointer = (IntPtr)arg4Ptr,
+                    Size = (arg4.Length + 1) * sizeof(char)
+                };
+                descrs[4] = new EventData
+                {
+                    DataPointer = (IntPtr)arg5Ptr,
+                    Size = (arg5.Length + 1) * sizeof(char)
+                };
+                descrs[5] = new EventData
+                {
+                    DataPointer = (IntPtr)(&arg6),
+                    Size = sizeof(int)
+                };
+                descrs[6] = new EventData
+                {
+                    DataPointer = (IntPtr)arg7Ptr,
+                    Size = (arg7.Length + 1) * sizeof(char)
+                };
+            }
 
             WriteEventCore(eventId, NumEventDatas, descrs);
         }

src/libraries/System.Net.Http/src/System/Net/Http/SocketsHttpHandler/Http2Connection.cs

@@ -132,8 +132,8 @@ internal enum KeepAliveState
         private long _keepAlivePingTimeoutTimestamp;
         private volatile KeepAliveState _keepAliveState;
 
-        public Http2Connection(HttpConnectionPool pool, Stream stream)
-            : base(pool)
+        public Http2Connection(HttpConnectionPool pool, Stream stream, IPEndPoint? remoteEndPoint)
+            : base(pool, remoteEndPoint)
         {
             _pool = pool;
             _stream = stream;
@@ -1656,7 +1656,7 @@ private async ValueTask<Http2Stream> SendHeadersAsync(HttpRequestMessage request
             ArrayBuffer headerBuffer = default;
             try
             {
-                if (HttpTelemetry.Log.IsEnabled()) HttpTelemetry.Log.RequestHeadersStart();
+                if (HttpTelemetry.Log.IsEnabled()) HttpTelemetry.Log.RequestHeadersStart(Id);
 
                 // Serialize headers to a temporary buffer, and do as much work to prepare to send the headers as we can
                 // before taking the write lock.

src/libraries/System.Net.Http/src/System/Net/Http/SocketsHttpHandler/Http3Connection.cs

@@ -66,7 +66,7 @@ private bool ShuttingDown
         }
 
         public Http3Connection(HttpConnectionPool pool, HttpAuthority authority, QuicConnection connection, bool includeAltUsedHeader)
-            : base(pool)
+            : base(pool, connection.RemoteEndPoint)
         {
             _pool = pool;
             _authority = authority;

src/libraries/System.Net.Http/src/System/Net/Http/SocketsHttpHandler/Http3RequestStream.cs

@@ -552,7 +552,7 @@ private void CopyTrailersToResponseMessage(HttpResponseMessage responseMessage)
 
         private void BufferHeaders(HttpRequestMessage request)
         {
-            if (HttpTelemetry.Log.IsEnabled()) HttpTelemetry.Log.RequestHeadersStart();
+            if (HttpTelemetry.Log.IsEnabled()) HttpTelemetry.Log.RequestHeadersStart(_connection.Id);
 
             // Reserve space for the header frame envelope.
             // The envelope needs to be written after headers are serialized, as we need to know the payload length first.

src/libraries/System.Net.Http/src/System/Net/Http/SocketsHttpHandler/HttpConnection.cs

@@ -74,8 +74,9 @@ internal sealed partial class HttpConnection : HttpConnectionBase
         public HttpConnection(
             HttpConnectionPool pool,
             Stream stream,
-            TransportContext? transportContext)
-            : base(pool)
+            TransportContext? transportContext,
+            IPEndPoint? remoteEndPoint)
+            : base(pool, remoteEndPoint)
         {
             Debug.Assert(pool != null);
             Debug.Assert(stream != null);
@@ -517,7 +518,7 @@ public async Task<HttpResponseMessage> SendAsync(HttpRequestMessage request, boo
             CancellationTokenRegistration cancellationRegistration = RegisterCancellation(cancellationToken);
             try
             {
-                if (HttpTelemetry.Log.IsEnabled()) HttpTelemetry.Log.RequestHeadersStart();
+                if (HttpTelemetry.Log.IsEnabled()) HttpTelemetry.Log.RequestHeadersStart(Id);
 
                 WriteHeaders(request, normalizedMethod);
 

src/libraries/System.Net.Http/src/System/Net/Http/SocketsHttpHandler/HttpConnectionBase.cs

@@ -16,6 +16,8 @@ namespace System.Net.Http
 {
     internal abstract class HttpConnectionBase : IDisposable, IHttpTrace
     {
+        private static long s_connectionCounter = -1;
+
         // May be null if none of the counters were enabled when the connection was established.
         private readonly ConnectionMetrics? _connectionMetrics;
 
@@ -31,7 +33,9 @@ internal abstract class HttpConnectionBase : IDisposable, IHttpTrace
         /// <summary>Cached string for the last Server header received on this connection.</summary>
         private string? _lastServerHeaderValue;
 
-        public HttpConnectionBase(HttpConnectionPool pool)
+        public long Id { get; } = Interlocked.Increment(ref s_connectionCounter);
+
+        public HttpConnectionBase(HttpConnectionPool pool, IPEndPoint? remoteEndPoint)
         {
             Debug.Assert(this is HttpConnection or Http2Connection or Http3Connection);
             Debug.Assert(pool.Settings._metrics is not null);
@@ -55,7 +59,8 @@ public HttpConnectionBase(HttpConnectionPool pool)
                     protocol,
                     pool.IsSecure ? "https" : "http",
                     pool.OriginAuthority.HostValue,
-                    port == defaultPort ? null : port);
+                    port == defaultPort ? null : port,
+                    remoteEndPoint?.Address?.ToString());
 
                 _connectionMetrics.ConnectionEstablished();
 
@@ -66,9 +71,13 @@ public HttpConnectionBase(HttpConnectionPool pool)
             {
                 _httpTelemetryMarkedConnectionAsOpened = true;
 
-                if (this is HttpConnection) HttpTelemetry.Log.Http11ConnectionEstablished();
-                else if (this is Http2Connection) HttpTelemetry.Log.Http20ConnectionEstablished();
-                else HttpTelemetry.Log.Http30ConnectionEstablished();
+                string scheme = pool.IsSecure ? "https" : "http";
+                string host = pool.OriginAuthority.HostValue;
+                int port = pool.OriginAuthority.Port;
+
+                if (this is HttpConnection) HttpTelemetry.Log.Http11ConnectionEstablished(Id, scheme, host, port, remoteEndPoint);
+                else if (this is Http2Connection) HttpTelemetry.Log.Http20ConnectionEstablished(Id, scheme, host, port, remoteEndPoint);
+                else HttpTelemetry.Log.Http30ConnectionEstablished(Id, scheme, host, port, remoteEndPoint);
             }
         }
 
@@ -81,9 +90,9 @@ public void MarkConnectionAsClosed()
                 // Only decrement the connection count if we counted this connection
                 if (_httpTelemetryMarkedConnectionAsOpened)
                 {
-                    if (this is HttpConnection) HttpTelemetry.Log.Http11ConnectionClosed();
-                    else if (this is Http2Connection) HttpTelemetry.Log.Http20ConnectionClosed();
-                    else HttpTelemetry.Log.Http30ConnectionClosed();
+                    if (this is HttpConnection) HttpTelemetry.Log.Http11ConnectionClosed(Id);
+                    else if (this is Http2Connection) HttpTelemetry.Log.Http20ConnectionClosed(Id);
+                    else HttpTelemetry.Log.Http30ConnectionClosed(Id);
                 }
             }
         }
@@ -127,7 +136,7 @@ protected void TraceConnection(Stream stream)
             if (stream is SslStream sslStream)
             {
                 Trace(
-                    $"{this}. " +
+                    $"{this}. Id:{Id}, " +
                     $"SslProtocol:{sslStream.SslProtocol}, NegotiatedApplicationProtocol:{sslStream.NegotiatedApplicationProtocol}, " +
                     $"NegotiatedCipherSuite:{sslStream.NegotiatedCipherSuite}, CipherAlgorithm:{sslStream.CipherAlgorithm}, CipherStrength:{sslStream.CipherStrength}, " +
                     $"HashAlgorithm:{sslStream.HashAlgorithm}, HashStrength:{sslStream.HashStrength}, " +
@@ -136,7 +145,7 @@ protected void TraceConnection(Stream stream)
             }
             else
             {
-                Trace($"{this}");
+                Trace($"{this}. Id:{Id}");
             }
         }