Drain chunked extensions + refactor

src/Microsoft.AspNetCore.Server.Kestrel/Http/MessageBody.cs

@@ -3,6 +3,7 @@
 
 using System;
 using System.IO;
+using System.Numerics;
 using System.Threading;
 using System.Threading.Tasks;
 using Microsoft.AspNetCore.Server.Kestrel.Infrastructure;
@@ -11,10 +12,10 @@ namespace Microsoft.AspNetCore.Server.Kestrel.Http
 {
     public abstract class MessageBody
     {
-        private readonly FrameContext _context;
+        private readonly Frame _context;
         private int _send100Continue = 1;
 
-        protected MessageBody(FrameContext context)
+        protected MessageBody(Frame context)
         {
             _context = context;
         }
@@ -99,7 +100,7 @@ namespace Microsoft.AspNetCore.Server.Kestrel.Http
         public static MessageBody For(
             string httpVersion,
             FrameRequestHeaders headers,
-            FrameContext context)
+            Frame context)
         {
             // see also http://tools.ietf.org/html/rfc2616#section-4.4
 
@@ -114,7 +115,7 @@ namespace Microsoft.AspNetCore.Server.Kestrel.Http
             var transferEncoding = headers.HeaderTransferEncoding.ToString();
             if (transferEncoding.Length > 0)
             {
-                return new ForChunkedEncoding(keepAlive, context);
+                return new ForChunkedEncoding(keepAlive, headers, context);
             }
 
             var contentLength = headers.HeaderContentLength.ToString();
@@ -133,7 +134,7 @@ namespace Microsoft.AspNetCore.Server.Kestrel.Http
 
         private class ForRemainingData : MessageBody
         {
-            public ForRemainingData(FrameContext context)
+            public ForRemainingData(Frame context)
                 : base(context)
             {
             }
@@ -149,7 +150,7 @@ namespace Microsoft.AspNetCore.Server.Kestrel.Http
             private readonly int _contentLength;
             private int _inputLength;
 
-            public ForContentLength(bool keepAlive, int contentLength, FrameContext context)
+            public ForContentLength(bool keepAlive, int contentLength, Frame context)
                 : base(context)
             {
                 RequestKeepAlive = keepAlive;
@@ -204,96 +205,203 @@ namespace Microsoft.AspNetCore.Server.Kestrel.Http
         /// </summary>
         private class ForChunkedEncoding : MessageBody
         {
-            private int _inputLength;
+            private static Vector<byte> _vectorCRs = new Vector<byte>((byte)'\r');
-            private Mode _mode = Mode.ChunkPrefix;
 
-            public ForChunkedEncoding(bool keepAlive, FrameContext context)
+            private int _inputLength;
+            private Mode _mode = Mode.Prefix;
+            private FrameRequestHeaders _requestHeaders;
+
+            public ForChunkedEncoding(bool keepAlive, FrameRequestHeaders headers, Frame context)
                 : base(context)
             {
                 RequestKeepAlive = keepAlive;
+                _requestHeaders = headers;
             }
+
             public override ValueTask<int> ReadAsyncImplementation(ArraySegment<byte> buffer, CancellationToken cancellationToken)
             {
-                return ReadAsyncAwaited(buffer, cancellationToken);
+                return ReadStateMachineAsync(_context.SocketInput, buffer, cancellationToken);
             }
 
-            private async Task<int> ReadAsyncAwaited(ArraySegment<byte> buffer, CancellationToken cancellationToken)
+            private async Task<int> ReadStateMachineAsync(SocketInput input, ArraySegment<byte> buffer, CancellationToken cancellationToken)
             {
-                var input = _context.SocketInput;
+                while (_mode < Mode.Trailer)
-
-                while (_mode != Mode.Trailer && _mode != Mode.Complete)
                 {
-                    while (_mode == Mode.ChunkPrefix)
+                    while (_mode == Mode.Prefix)
                     {
-                        ReadChunkedPrefix(input);
+                        ParseChunkedPrefix(input);
-                        await input;
+                        if (_mode != Mode.Prefix)
+                        {
+                            break;
                         }
 
-                    while (_mode == Mode.ChunkData)
+                        await GetDataAsync(input);
+                    }
+
+                    while (_mode == Mode.Extension)
+                    {
+                        ParseExtension(input);
+                        if (_mode != Mode.Extension)
+                        {
+                            break;
+                        }
+
+                        await GetDataAsync(input);
+                    }
+
+                    while (_mode == Mode.Data)
                     {
                         int actual = ReadChunkedData(input, buffer.Array, buffer.Offset, buffer.Count);
                         if (actual != 0)
                         {
                             return actual;
                         }
-
+                        else if (_mode != Mode.Data)
-                        await input;
-                    }
-
-                    while (_mode == Mode.ChunkSuffix)
                         {
-                        ReadChunkedSuffix(input);
+                            break;
-                        await input;
+                        }
+
+                        await GetDataAsync(input);
+                    }
+
+                    while (_mode == Mode.Suffix)
+                    {
+                        ParseChunkedSuffix(input);
+                        if (_mode != Mode.Suffix)
+                        {
+                            break;
+                        }
+
+                        await GetDataAsync(input);
                     }
                 }
 
+                // Chunks finished, parse trailers
                 while (_mode == Mode.Trailer)
                 {
-                    ReadChunkedTrailer(input);
+                    ParseChunkedTrailer(input);
-
+                    if (_mode != Mode.Trailer)
-                    if (_mode != Mode.Complete && _mode != Mode.TrailerHeaders)
                     {
-                        await input;
+                        break;
                     }
+
+                    await GetDataAsync(input);
                 }
 
                 if (_mode == Mode.TrailerHeaders)
                 {
-                    // Take trailer headers
+                    while (!Frame.TakeMessageHeaders(input, _requestHeaders))
-                    var frame = (Frame)_context;
-                    while (!Frame.TakeMessageHeaders(input, frame._requestHeaders))
                     {
-                        if (input.RemoteIntakeFin)
+                        await GetDataAsync(input);
-                        {
-                            ThrowChunkedRequestIncomplete();
                     }
 
-                        await input;
+                    _mode = Mode.Complete;
-                    }
                 }
 
                 return 0;
             }
 
-            private void ReadChunkedPrefix(SocketInput input)
+            private void ParseChunkedPrefix(SocketInput input)
             {
-                int chunkSize;
+                var scan = input.ConsumingStart();
-                if (TakeChunkedLine(input, out chunkSize))
+                var consumed = scan;
+                try
                 {
-                    if (chunkSize == 0)
+                    var ch1 = scan.Take();
+                    var ch2 = scan.Take();
+                    if (ch1 == -1 || ch2 == -1)
                     {
-                        _mode = Mode.Trailer;
+                        return;
+                    }
+
+                    var chunkSize = CalculateChunkSize(ch1, 0);
+                    ch1 = ch2;
+
+                    do
+                    {
+                        if (ch1 == ';')
+                        {
+                            consumed = scan;
+
+                            _inputLength = chunkSize;
+                            _mode = Mode.Extension;
+                            return;
+                        }
+
+                        ch2 = scan.Take();
+                        if (ch2 == -1)
+                        {
+                            return;
+                        }
+
+                        if (ch1 == '\r' && ch2 == '\n')
+                        {
+                            consumed = scan;
+                            _inputLength = chunkSize;
+
+                            if (chunkSize > 0)
+                            {
+                                _mode = Mode.Data;
                             }
                             else
                             {
-                        _mode = Mode.ChunkData;
+                                _mode = Mode.Trailer;
                             }
 
-                    _inputLength = chunkSize;
+                            return;
                         }
-                else if (input.RemoteIntakeFin)
+
+                        chunkSize = CalculateChunkSize(ch1, chunkSize);
+                        ch1 = ch2;
+                    } while (ch1 != -1);
+                }
+                finally
                 {
-                    ThrowChunkedRequestIncomplete();
+                    input.ConsumingComplete(consumed, scan);
+                }
+            }
+
+            private void ParseExtension(SocketInput input)
+            {
+                var scan = input.ConsumingStart();
+                var consumed = scan;
+                try
+                {
+                    // Chunk-extensions not currently parsed
+                    // Just drain the data
+                    do
+                    {
+                        if (scan.Seek(ref _vectorCRs) == -1)
+                        {
+                            // End marker not found yet
+                            consumed = scan;
+                            return;
+                        };
+
+                        var ch1 = scan.Take();
+                        var ch2 = scan.Take();
+
+                        if (ch2 == '\n')
+                        {
+                            consumed = scan;
+                            if (_inputLength > 0)
+                            {
+                                _mode = Mode.Data;
+                            }
+                            else
+                            {
+                                _mode = Mode.Trailer;
+                            }
+                        }
+                        else if (ch2 == -1)
+                        {
+                            return;
+                        }
+                    } while (_mode == Mode.Extension);
+                }
+                finally
+                {
+                    input.ConsumingComplete(consumed, scan);
                 }
             }
 
@@ -314,17 +422,17 @@ namespace Microsoft.AspNetCore.Server.Kestrel.Http
 
                 if (_inputLength == 0)
                 {
-                    _mode = Mode.ChunkSuffix;
+                    _mode = Mode.Suffix;
                 }
-                else if (actual == 0 && input.RemoteIntakeFin)
+                else if (actual == 0)
                 {
-                    ThrowChunkedRequestIncomplete();
+                    ThrowIfRequestIncomplete(input);
                 }
 
                 return actual;
             }
 
-            private void ReadChunkedSuffix(SocketInput input)
+            private void ParseChunkedSuffix(SocketInput input)
             {
                 var scan = input.ConsumingStart();
                 var consumed = scan;
@@ -332,18 +440,14 @@ namespace Microsoft.AspNetCore.Server.Kestrel.Http
                 {
                     var ch1 = scan.Take();
                     var ch2 = scan.Take();
-
+                    if (ch1 == -1 || ch2 == -1)
-                    if (ch1 == '\r' && ch2 == '\n')
+                    {
+                        return;
+                    }
+                    else if (ch1 == '\r' && ch2 == '\n')
                     {
                         consumed = scan;
-                        _mode = Mode.ChunkPrefix;
+                        _mode = Mode.Prefix;
-                    }
-                    else if (ch1 == -1 || ch2 == -1)
-                    {
-                        if (input.RemoteIntakeFin)
-                        {
-                            ThrowChunkedRequestIncomplete();
-                        }
                     }
                     else
                     {
@@ -356,7 +460,7 @@ namespace Microsoft.AspNetCore.Server.Kestrel.Http
                 }
             }
 
-            private void ReadChunkedTrailer(SocketInput input)
+            private void ParseChunkedTrailer(SocketInput input)
             {
                 var scan = input.ConsumingStart();
                 var consumed = scan;
@@ -365,30 +469,19 @@ namespace Microsoft.AspNetCore.Server.Kestrel.Http
                     var ch1 = scan.Take();
                     var ch2 = scan.Take();
 
-                    if (ch1 == '\r' && ch2 == '\n')
+                    if (ch1 == -1 || ch2 == -1)
+                    {
+                        return;
+                    }
+                    else if (ch1 == '\r' && ch2 == '\n')
                     {
                         consumed = scan;
                         _mode = Mode.Complete;
                     }
-                    else if (ch1 == -1 || ch2 == -1)
-                    {
-                        if (input.RemoteIntakeFin)
-                        {
-                            ThrowChunkedRequestIncomplete();
-                        }
-                    }
                     else
-                    {
-                        // Post request headers
-                        if (_context is Frame)
                     {
                         _mode = Mode.TrailerHeaders;
                     }
-                        else
-                        {
-                            ThrowTrailingHeadersNotSupported();
-                        }
-                    }
                 }
                 finally
                 {
@@ -396,124 +489,61 @@ namespace Microsoft.AspNetCore.Server.Kestrel.Http
                 }
             }
 
-            private static bool TakeChunkedLine(SocketInput baton, out int chunkSizeOut)
+            private static int CalculateChunkSize(int extraHexDigit, int currentParsedSize)
             {
-                var scan = baton.ConsumingStart();
+                checked
-                var consumed = scan;
-                try
                 {
-                    var ch0 = scan.Take();
+                    if (extraHexDigit >= '0' && extraHexDigit <= '9')
-                    var chunkSize = 0;
-                    var mode = Mode.ChunkPrefix;
-                    while (ch0 != -1)
                     {
-                        var ch1 = scan.Take();
+                        return currentParsedSize * 0x10 + (extraHexDigit - '0');
-                        if (ch1 == -1)
-                        {
-                            chunkSizeOut = 0;
-                            return false;
                     }
-
+                    else if (extraHexDigit >= 'A' && extraHexDigit <= 'F')
-                        if (mode == Mode.ChunkPrefix)
                     {
-                            if (ch0 >= '0' && ch0 <= '9')
+                        return currentParsedSize * 0x10 + (extraHexDigit - ('A' - 10));
-                            {
-                                chunkSize = chunkSize * 0x10 + (ch0 - '0');
                     }
-                            else if (ch0 >= 'A' && ch0 <= 'F')
+                    else if (extraHexDigit >= 'a' && extraHexDigit <= 'f')
                     {
-                                chunkSize = chunkSize * 0x10 + (ch0 - ('A' - 10));
+                        return currentParsedSize * 0x10 + (extraHexDigit - ('a' - 10));
-                            }
-                            else if (ch0 >= 'a' && ch0 <= 'f')
-                            {
-                                chunkSize = chunkSize * 0x10 + (ch0 - ('a' - 10));
                     }
                     else
                     {
-                                ThrowInvalidFormat();
+                        return ThrowInvalidFormat();
                     }
-                            mode = Mode.ChunkData;
-                        }
-                        else if (mode == Mode.ChunkData)
-                        {
-                            if (ch0 >= '0' && ch0 <= '9')
-                            {
-                                chunkSize = chunkSize * 0x10 + (ch0 - '0');
-                            }
-                            else if (ch0 >= 'A' && ch0 <= 'F')
-                            {
-                                chunkSize = chunkSize * 0x10 + (ch0 - ('A' - 10));
-                            }
-                            else if (ch0 >= 'a' && ch0 <= 'f')
-                            {
-                                chunkSize = chunkSize * 0x10 + (ch0 - ('a' - 10));
-                            }
-                            else if (ch0 == ';')
-                            {
-                                mode = Mode.ChunkSuffix;
-                            }
-                            else if (ch0 == '\r' && ch1 == '\n')
-                            {
-                                consumed = scan;
-                                chunkSizeOut = chunkSize;
-                                return true;
-                            }
-                            else
-                            {
-                                ThrowInvalidFormat();
-                            }
-                        }
-                        else if (mode == Mode.ChunkSuffix)
-                        {
-                            if (ch0 == '\r' && ch1 == '\n')
-                            {
-                                consumed = scan;
-                                chunkSizeOut = chunkSize;
-                                return true;
-                            }
-                            else
-                            {
-                                // chunk-extensions not currently parsed
-                                ThrowChunkedExtensionsNotSupported();
                 }
             }
 
-                        ch0 = ch1;
+            private static SocketInput GetDataAsync(SocketInput input)
-                    }
-                    chunkSizeOut = 0;
-                    return false;
-                }
-                finally
             {
-                    baton.ConsumingComplete(consumed, scan);
+                ThrowIfRequestIncomplete(input);
+
+                return input;
+            }
+
+            private static void ThrowIfRequestIncomplete(SocketInput input)
+            {
+                if (input.RemoteIntakeFin)
+                {
+                    ThrowRequestIncomplete();
                 }
             }
 
-            private static void ThrowInvalidFormat()
+            private static int ThrowInvalidFormat()
             {
-                throw new InvalidOperationException("Bad Request");
+                // returns int so can be used as item non-void function
+                throw new InvalidOperationException("Bad request");
             }
 
-            private static void ThrowChunkedRequestIncomplete()
+            private static void ThrowRequestIncomplete()
             {
                 throw new InvalidOperationException("Chunked request incomplete");
             }
 
-            private static void ThrowChunkedExtensionsNotSupported()
-            {
-                throw new NotImplementedException("Chunked-extensions not supported");
-            }
-
-            private static void ThrowTrailingHeadersNotSupported()
-            {
-                throw new NotImplementedException("Trailing headers not supported");
-            }
-
             private enum Mode
             {
-                ChunkPrefix,
+                Prefix,
-                ChunkData,
+                Extension,
-                ChunkSuffix,
+                Data,
+                Suffix,
                 Trailer,
                 TrailerHeaders,
                 Complete

test/Microsoft.AspNetCore.Server.KestrelTests/ChunkedRequestTests.cs

@@ -2,15 +2,16 @@
 // Licensed under the Apache License, Version 2.0. See License.txt in the project root for license information.
 
 using System;
+using System.Collections.Generic;
 using System.IO;
 using System.Linq;
+using System.Net.Sockets;
 using System.Text;
 using System.Threading.Tasks;
 using Microsoft.AspNetCore.Http;
 using Microsoft.AspNetCore.Server.Kestrel;
 using Microsoft.AspNetCore.Server.Kestrel.Filter;
 using Microsoft.AspNetCore.Server.Kestrel.Infrastructure;
-using Microsoft.AspNetCore.Testing.xunit;
 using Microsoft.Extensions.Logging;
 using Xunit;
 
@@ -64,7 +65,7 @@ namespace Microsoft.AspNetCore.Server.KestrelTests
             await response.Body.WriteAsync(bytes, 0, bytes.Length);
         }
 
-        [ConditionalTheory]
+        [Theory]
         [MemberData(nameof(ConnectionFilterData))]
         public async Task Http10TransferEncoding(ServiceContext testContext)
         {
@@ -88,7 +89,7 @@ namespace Microsoft.AspNetCore.Server.KestrelTests
             }
         }
 
-        [ConditionalTheory]
+        [Theory]
         [MemberData(nameof(ConnectionFilterData))]
         public async Task Http10KeepAliveTransferEncoding(ServiceContext testContext)
         {
@@ -123,7 +124,7 @@ namespace Microsoft.AspNetCore.Server.KestrelTests
             }
         }
 
-        [ConditionalTheory]
+        [Theory]
         [MemberData(nameof(ConnectionFilterData))]
         public async Task RequestBodyIsConsumedAutomaticallyIfAppDoesntConsumeItFully(ServiceContext testContext)
         {
@@ -171,9 +172,8 @@ namespace Microsoft.AspNetCore.Server.KestrelTests
             }
         }
 
-        [ConditionalTheory]
+        [Theory]
         [MemberData(nameof(ConnectionFilterData))]
-        [FrameworkSkipCondition(RuntimeFrameworks.Mono, SkipReason = "Test hangs after execution on Mono.")]
         public async Task TrailingHeadersAreParsed(ServiceContext testContext)
         {
             var requestCount = 10;
@@ -186,20 +186,20 @@ namespace Microsoft.AspNetCore.Server.KestrelTests
 
                 var buffer = new byte[200];
 
-                Assert.Equal(string.Empty, request.Headers["X-Trailer-Header"]);
+                Assert.True(string.IsNullOrEmpty(request.Headers["X-Trailer-Header"]));
 
-                while(await request.Body.ReadAsync(buffer, 0, buffer.Length) != 0)
+                while (await request.Body.ReadAsync(buffer, 0, buffer.Length) != 0)
                 {
                     // read to end
                 }
 
                 if (requestsReceived < requestCount)
                 {
-                    Assert.Equal(new string('a', requestsReceived), request.Headers["X-Trailer-Header"]);
+                    Assert.Equal(new string('a', requestsReceived), request.Headers["X-Trailer-Header"].ToString());
                 }
                 else
                 {
-                    Assert.Equal(string.Empty, request.Headers["X-Trailer-Header"]);
+                    Assert.True(string.IsNullOrEmpty(request.Headers["X-Trailer-Header"]));
                 }
 
                 requestsReceived++;
@@ -218,41 +218,231 @@ namespace Microsoft.AspNetCore.Server.KestrelTests
 
                 var expectedFullResponse = string.Join("", Enumerable.Repeat(response, requestCount + 1));
 
-                using (var connection = new TestConnection(server.Port))
+                IEnumerable<string> sendSequence = new string[] {
-                {
-                    await connection.Send(
                     "POST / HTTP/1.1",
                     "Transfer-Encoding: chunked",
                     "",
-                        "C", "HelloChunked",
+                    "C", 
+                    "HelloChunked",
                     "0",
-                        "");
+                    ""};
 
                 for (var i = 1; i < requestCount; i++)
                 {
-                        await connection.Send(
+                    sendSequence = sendSequence.Concat(new string[] {
                         "POST / HTTP/1.1",
                         "Transfer-Encoding: chunked",
                         "",
-                            "C", "HelloChunked",
+                        "C",
+                        $"HelloChunk{i:00}",
                         "0",
-                            string.Concat("X-Trailer-Header", new string('a', i)),
+                        string.Concat("X-Trailer-Header: ", new string('a', i)),
-                            "");
+                        "" });
                 }
 
-                    await connection.SendEnd(
+                sendSequence = sendSequence.Concat(new string[] {
                     "POST / HTTP/1.1",
                     "Content-Length: 7",
                     "",
-                        "Goodbye");
+                    "Goodbye"
+                });
+
+                var fullRequest = sendSequence.ToArray();
+
+                using (var connection = new TestConnection(server.Port))
+                {
+                    await connection.SendEnd(fullRequest);
 
                     await connection.ReceiveEnd(expectedFullResponse);
                 }
             }
         }
 
+        [Theory]
+        [MemberData(nameof(ConnectionFilterData))]
+        public async Task ExtensionsAreIgnored(ServiceContext testContext)
+        {
+            var requestCount = 10;
+            var requestsReceived = 0;
+
+            using (var server = new TestServer(async httpContext =>
+            {
+                var response = httpContext.Response;
+                var request = httpContext.Request;
+
+                var buffer = new byte[200];
+
+                Assert.True(string.IsNullOrEmpty(request.Headers["X-Trailer-Header"]));
+
+                while (await request.Body.ReadAsync(buffer, 0, buffer.Length) != 0)
+                {
+                    // read to end
+                }
+
+                if (requestsReceived < requestCount)
+                {
+                    Assert.Equal(new string('a', requestsReceived), request.Headers["X-Trailer-Header"].ToString());
+                }
+                else
+                {
+                    Assert.True(string.IsNullOrEmpty(request.Headers["X-Trailer-Header"]));
+                }
+
+                requestsReceived++;
+
+                response.Headers.Clear();
+                response.Headers["Content-Length"] = new[] { "11" };
+
+                await response.Body.WriteAsync(Encoding.ASCII.GetBytes("Hello World"), 0, 11);
+            }, testContext))
+            {
+                var response = string.Join("\r\n", new string[] {
+                    "HTTP/1.1 200 OK",
+                    "Content-Length: 11",
+                    "",
+                    "Hello World"});
+
+                var expectedFullResponse = string.Join("", Enumerable.Repeat(response, requestCount + 1));
+
+                IEnumerable<string> sendSequence = new string[] {
+                    "POST / HTTP/1.1",
+                    "Transfer-Encoding: chunked",
+                    "",
+                    "C;hello there",
+                    "HelloChunked",
+                    "0;hello there",
+                    ""};
+
+                for (var i = 1; i < requestCount; i++)
+                {
+                    sendSequence = sendSequence.Concat(new string[] {
+                        "POST / HTTP/1.1",
+                        "Transfer-Encoding: chunked",
+                        "",
+                        "C;hello there",
+                        $"HelloChunk{i:00}",
+                        "0;hello there",
+                        string.Concat("X-Trailer-Header: ", new string('a', i)),
+                        "" });
+                }
+
+                sendSequence = sendSequence.Concat(new string[] {
+                    "POST / HTTP/1.1",
+                    "Content-Length: 7",
+                    "",
+                    "Goodbye"
+                });
+
+                var fullRequest = sendSequence.ToArray();
+
+                using (var connection = new TestConnection(server.Port))
+                {
+                    await connection.SendEnd(fullRequest);
+
+                    await connection.ReceiveEnd(expectedFullResponse);
+                }
+            }
+        }
+
+        [Theory]
+        [MemberData(nameof(ConnectionFilterData))]
+        public async Task InvalidLengthResultsIn500(ServiceContext testContext)
+        {
+            using (var server = new TestServer(async httpContext =>
+            {
+                var response = httpContext.Response;
+                var request = httpContext.Request;
+
+                var buffer = new byte[200];
+
+                while (await request.Body.ReadAsync(buffer, 0, buffer.Length) != 0)
+                {
+                    ;// read to end
+                }
+
+                response.Headers.Clear();
+                response.Headers["Content-Length"] = new[] { "11" };
+
+                await response.Body.WriteAsync(Encoding.ASCII.GetBytes("Hello World"), 0, 11);
+            }, testContext))
+            {
+                using (var connection = new TestConnection(server.Port))
+                {
+                    await connection.Send(
+                    "POST / HTTP/1.1",
+                    "Transfer-Encoding: chunked",
+                    "",
+                    "Cio",
+                    "HelloChunked",
+                    "0",
+                    "");
+
+                    // Should really be a 40x as is bad request
+                    await connection.Receive(
+                        "HTTP/1.1 500 Internal Server Error",
+                        "");
+                    await connection.ReceiveStartsWith("Date:");
+                    await connection.ReceiveEnd(
+                        "Content-Length: 0",
+                        "Server: Kestrel",
+                        "",
+                        "");
+                }
+            }
+        }
+
+        [Theory]
+        [MemberData(nameof(ConnectionFilterData))]
+        public async Task InvalidSizedDataResultsIn500(ServiceContext testContext)
+        {
+            using (var server = new TestServer(async httpContext =>
+            {
+                var response = httpContext.Response;
+                var request = httpContext.Request;
+
+                var buffer = new byte[200];
+
+                while (await request.Body.ReadAsync(buffer, 0, buffer.Length) != 0)
+                {
+                    ;// read to end
+                }
+
+                response.Headers.Clear();
+                response.Headers["Content-Length"] = new[] { "11" };
+
+                await response.Body.WriteAsync(Encoding.ASCII.GetBytes("Hello World"), 0, 11);
+            }, testContext))
+            {
+                using (var connection = new TestConnection(server.Port))
+                {
+                    await connection.Send(
+                        "POST / HTTP/1.1",
+                        "Transfer-Encoding: chunked",
+                        "",
+                        "C",
+                        "HelloChunkedInvalid",
+                        "0",
+                        "");
+
+                    // Should really be a 40x as is bad request
+                    await connection.Receive(
+                        "HTTP/1.1 500 Internal Server Error",
+                        "");
+                    await connection.ReceiveStartsWith("Date:");
+                    await connection.ReceiveEnd(
+                        "Content-Length: 0",
+                        "Server: Kestrel",
+                        "",
+                        "");
+                }
+            }
+        }
+
         private class TestApplicationErrorLogger : ILogger
         {
+            // Application errors are logged using 13 as the eventId.
+            private const int ApplicationErrorEventId = 13;
+
             public int ApplicationErrorsLogged { get; set; }
 
             public IDisposable BeginScopeImpl(object state)
@@ -267,8 +457,7 @@ namespace Microsoft.AspNetCore.Server.KestrelTests
 
             public void Log<TState>(LogLevel logLevel, EventId eventId, TState state, Exception exception, Func<TState, Exception, string> formatter)
             {
-                // Application errors are logged using 13 as the eventId.
+                if (eventId.Id == ApplicationErrorEventId)
-                if (eventId.Id == 13)
                 {
                     ApplicationErrorsLogged++;
                 }

test/Microsoft.AspNetCore.Server.KestrelTests/TestInput.cs

@@ -18,17 +18,20 @@ namespace Microsoft.AspNetCore.Server.KestrelTests
         {
             var trace = new KestrelTrace(new TestKestrelTrace());
             var ltp = new LoggingThreadPool(trace);
-            FrameContext = new FrameContext
+            var context = new FrameContext()
             {
+                DateHeaderValueManager = new DateHeaderValueManager(),
+                ServerAddress = ServerAddress.FromUrl("http://localhost:5000"),
                 ConnectionControl = this,
                 FrameControl = this
             };
+            FrameContext = new Frame<object>(null, context);
 
             _memoryPool = new MemoryPool2();
             FrameContext.SocketInput = new SocketInput(_memoryPool, ltp);
         }
 
-        public FrameContext FrameContext { get; set; }
+        public Frame FrameContext { get; set; }
 
         public void Add(string text, bool fin = false)
         {