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Don't send body in HEAD response when using PipeWriter.Advance before headers flushed #59725

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Merged
merged 5 commits into from
Mar 6, 2025
Merged

Don't send body in HEAD response when using PipeWriter.Advance before headers flushed #59725

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1a38b96
Don't send body in HEAD response when using PipeWriter.Advance before…
BrennanConroy Jan 6, 2025
9bb37ca
test + fix
BrennanConroy Jan 6, 2025
96c885b
fix state bug
BrennanConroy Jan 14, 2025
000f75d
fb
BrennanConroy Feb 3, 2025
fdf96e3
fb
BrennanConroy Mar 4, 2025
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60 changes: 32 additions & 28 deletions src/Servers/Kestrel/Core/src/Internal/Http/Http1OutputProducer.cs
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Original file line number Diff line number Diff line change
Expand Up @@ -51,7 +51,7 @@ internal class Http1OutputProducer : IHttpOutputProducer, IDisposable
// Once write or flush is called, we modify the _currentChunkMemory to prepend the size of data written
// and append the end terminator.

private bool _autoChunk;
private ResponseBodyMode _responseBodyMode;

private bool _writeStreamSuffixCalled;

Expand Down Expand Up @@ -121,7 +121,7 @@ public ValueTask<FlushResult> WriteStreamSuffixAsync()
{
if (!_writeStreamSuffixCalled)
{
if (_autoChunk)
if (_responseBodyMode == ResponseBodyMode.Chunked)
{
var writer = new BufferWriter<PipeWriter>(_pipeWriter);
result = WriteAsyncInternal(ref writer, EndChunkedResponseBytes);
Expand All @@ -147,7 +147,7 @@ public ValueTask<FlushResult> FlushAsync(CancellationToken cancellationToken = d
return new ValueTask<FlushResult>(new FlushResult(false, true));
}

if (_autoChunk)
if (_responseBodyMode == ResponseBodyMode.Chunked)
{
if (_advancedBytesForChunk > 0)
{
Expand All @@ -173,7 +173,7 @@ static ValueTask<FlushResult> FlushAsyncChunked(Http1OutputProducer producer, Ca
// Local function so in the common-path the stack space for BufferWriter isn't reserved and cleared when it isn't used.

Debug.Assert(!producer._pipeWriterCompleted);
Debug.Assert(producer._autoChunk && producer._advancedBytesForChunk > 0);
Debug.Assert(producer._responseBodyMode == ResponseBodyMode.Chunked && producer._advancedBytesForChunk > 0);

var writer = new BufferWriter<PipeWriter>(producer._pipeWriter);
producer.WriteCurrentChunkMemoryToPipeWriter(ref writer);
Expand Down Expand Up @@ -203,7 +203,7 @@ public Memory<byte> GetMemory(int sizeHint = 0)
{
return LeasedMemory(sizeHint);
}
else if (_autoChunk)
else if (_responseBodyMode == ResponseBodyMode.Chunked)
{
return GetChunkedMemory(sizeHint);
}
Expand All @@ -228,7 +228,7 @@ public Span<byte> GetSpan(int sizeHint = 0)
{
return LeasedMemory(sizeHint).Span;
}
else if (_autoChunk)
else if (_responseBodyMode == ResponseBodyMode.Chunked)
{
return GetChunkedMemory(sizeHint).Span;
}
Expand Down Expand Up @@ -262,7 +262,7 @@ public void Advance(int bytes)
_position += bytes;
}
}
else if (_autoChunk)
else if (_responseBodyMode == ResponseBodyMode.Chunked)
{
if (_advancedBytesForChunk > _currentChunkMemory.Length - _currentMemoryPrefixBytes - EndChunkLength - bytes)
{
Expand Down Expand Up @@ -333,7 +333,7 @@ private void CommitChunkInternal(ref BufferWriter<PipeWriter> writer, ReadOnlySp
writer.Commit();
}

public void WriteResponseHeaders(int statusCode, string? reasonPhrase, HttpResponseHeaders responseHeaders, bool autoChunk, bool appComplete)
public void WriteResponseHeaders(int statusCode, string? reasonPhrase, HttpResponseHeaders responseHeaders, ResponseBodyMode responseBodyMode, bool appComplete)
{
lock (_contextLock)
{
Expand All @@ -346,11 +346,11 @@ public void WriteResponseHeaders(int statusCode, string? reasonPhrase, HttpRespo

var buffer = _pipeWriter;
var writer = new BufferWriter<PipeWriter>(buffer);
WriteResponseHeadersInternal(ref writer, statusCode, reasonPhrase, responseHeaders, autoChunk);
WriteResponseHeadersInternal(ref writer, statusCode, reasonPhrase, responseHeaders, responseBodyMode);
}
}

private void WriteResponseHeadersInternal(ref BufferWriter<PipeWriter> writer, int statusCode, string? reasonPhrase, HttpResponseHeaders responseHeaders, bool autoChunk)
private void WriteResponseHeadersInternal(ref BufferWriter<PipeWriter> writer, int statusCode, string? reasonPhrase, HttpResponseHeaders responseHeaders, ResponseBodyMode responseBodyMode)
{
writer.Write(HttpVersion11Bytes);
var statusBytes = ReasonPhrases.ToStatusBytes(statusCode, reasonPhrase);
Expand All @@ -360,7 +360,8 @@ private void WriteResponseHeadersInternal(ref BufferWriter<PipeWriter> writer, i

writer.Commit();

_autoChunk = autoChunk;
Debug.Assert(responseBodyMode != ResponseBodyMode.Uninitialized);
_responseBodyMode = responseBodyMode;
WriteDataWrittenBeforeHeaders(ref writer);
_unflushedBytes += writer.BytesCommitted;

Expand All @@ -373,11 +374,11 @@ private void WriteDataWrittenBeforeHeaders(ref BufferWriter<PipeWriter> writer)
{
foreach (var segment in _completedSegments)
{
if (_autoChunk)
if (_responseBodyMode == ResponseBodyMode.Chunked)
{
CommitChunkInternal(ref writer, segment.Span);
}
else
else if (_responseBodyMode == ResponseBodyMode.ContentLength)
{
writer.Write(segment.Span);
writer.Commit();
Expand All @@ -391,16 +392,19 @@ private void WriteDataWrittenBeforeHeaders(ref BufferWriter<PipeWriter> writer)

if (!_currentSegment.IsEmpty)
{
var segment = _currentSegment.Slice(0, _position);

if (_autoChunk)
if (_responseBodyMode != ResponseBodyMode.Disabled)
{
CommitChunkInternal(ref writer, segment.Span);
}
else
{
writer.Write(segment.Span);
writer.Commit();
var segment = _currentSegment.Slice(0, _position);

if (_responseBodyMode == ResponseBodyMode.Chunked)
{
CommitChunkInternal(ref writer, segment.Span);
}
else if (_responseBodyMode == ResponseBodyMode.ContentLength)
{
writer.Write(segment.Span);
writer.Commit();
}
}

_position = 0;
Expand Down Expand Up @@ -491,7 +495,7 @@ public ValueTask<FlushResult> Write100ContinueAsync()
return WriteAsync(ContinueBytes);
}

public ValueTask<FlushResult> FirstWriteAsync(int statusCode, string? reasonPhrase, HttpResponseHeaders responseHeaders, bool autoChunk, ReadOnlySpan<byte> buffer, CancellationToken cancellationToken)
public ValueTask<FlushResult> FirstWriteAsync(int statusCode, string? reasonPhrase, HttpResponseHeaders responseHeaders, ResponseBodyMode responseBodyMode, ReadOnlySpan<byte> buffer, CancellationToken cancellationToken)
{
lock (_contextLock)
{
Expand All @@ -505,13 +509,13 @@ public ValueTask<FlushResult> FirstWriteAsync(int statusCode, string? reasonPhra
// Uses same BufferWriter to write response headers and response
var writer = new BufferWriter<PipeWriter>(_pipeWriter);

WriteResponseHeadersInternal(ref writer, statusCode, reasonPhrase, responseHeaders, autoChunk);
WriteResponseHeadersInternal(ref writer, statusCode, reasonPhrase, responseHeaders, responseBodyMode);

return WriteAsyncInternal(ref writer, buffer, cancellationToken);
}
}

public ValueTask<FlushResult> FirstWriteChunkedAsync(int statusCode, string? reasonPhrase, HttpResponseHeaders responseHeaders, bool autoChunk, ReadOnlySpan<byte> buffer, CancellationToken cancellationToken)
public ValueTask<FlushResult> FirstWriteChunkedAsync(int statusCode, string? reasonPhrase, HttpResponseHeaders responseHeaders, ResponseBodyMode responseBodyMode, ReadOnlySpan<byte> buffer, CancellationToken cancellationToken)
{
lock (_contextLock)
{
Expand All @@ -525,7 +529,7 @@ public ValueTask<FlushResult> FirstWriteChunkedAsync(int statusCode, string? rea
// Uses same BufferWriter to write response headers and chunk
var writer = new BufferWriter<PipeWriter>(_pipeWriter);

WriteResponseHeadersInternal(ref writer, statusCode, reasonPhrase, responseHeaders, autoChunk);
WriteResponseHeadersInternal(ref writer, statusCode, reasonPhrase, responseHeaders, responseBodyMode);

CommitChunkInternal(ref writer, buffer);

Expand All @@ -541,7 +545,7 @@ public void Reset()
Debug.Assert(_completedSegments == null || _completedSegments.Count == 0);
// Cleared in sequential address ascending order
_currentMemoryPrefixBytes = 0;
_autoChunk = false;
_responseBodyMode = ResponseBodyMode.Uninitialized;
_writeStreamSuffixCalled = false;
_currentChunkMemoryUpdated = false;
_startCalled = false;
Expand Down Expand Up @@ -570,7 +574,7 @@ private ValueTask<FlushResult> WriteAsyncInternal(
ReadOnlySpan<byte> buffer,
CancellationToken cancellationToken = default)
{
if (_autoChunk)
if (_responseBodyMode == ResponseBodyMode.Chunked)
{
if (_advancedBytesForChunk > 0)
{
Expand Down
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