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Merge pull request #1766 from riganti/request-compression
gzip compression of command and staticCommand requests
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,96 @@ | ||
| using System; | ||
| using System.IO; | ||
| using System.Threading; | ||
| using System.Threading.Tasks; | ||
|
|
||
| namespace DotVVM.Framework.Utils | ||
| { | ||
| internal class LimitLengthStream : Stream | ||
| { | ||
| private readonly Stream innerStream; | ||
| private readonly long maxLength; | ||
| private readonly string comment; | ||
| private long position; | ||
|
|
||
| public LimitLengthStream(Stream innerStream, long maxLength, string errorComment) | ||
| { | ||
| this.innerStream = innerStream; | ||
| this.maxLength = maxLength; | ||
| this.comment = errorComment; | ||
| } | ||
|
|
||
| private void MovePosition(long offset) | ||
| { | ||
| position += offset; | ||
| if (position > maxLength) | ||
| throw new InvalidOperationException($"The stream is limited to {maxLength} bytes: {comment}"); | ||
| } | ||
|
|
||
| public long RemainingAllowedLength => maxLength - position; | ||
|
|
||
|
|
||
| public override bool CanRead => innerStream.CanRead; | ||
|
|
||
| public override bool CanSeek => false; | ||
|
|
||
| public override bool CanWrite => false; | ||
|
|
||
| public override long Length => innerStream.Length; | ||
|
|
||
| public override long Position | ||
| { | ||
| get => innerStream.Position; | ||
| set => throw new NotImplementedException(); | ||
| } | ||
|
|
||
| public override void Flush() => innerStream.Flush(); | ||
| public override int Read(byte[] buffer, int offset, int count) | ||
| { | ||
| var read = innerStream.Read(buffer, offset, (int)Math.Min(count, RemainingAllowedLength + 1)); | ||
| MovePosition(read); | ||
| return read; | ||
| } | ||
|
|
||
| public override async Task<int> ReadAsync(byte[] buffer, int offset, int count, CancellationToken cancellationToken) | ||
| { | ||
| var read = await innerStream.ReadAsync(buffer, offset, (int)Math.Min(count, RemainingAllowedLength + 1), cancellationToken); | ||
| MovePosition(read); | ||
| return read; | ||
| } | ||
| #if DotNetCore | ||
| public override int Read(Span<byte> buffer) | ||
| { | ||
| var read = innerStream.Read(buffer.Slice(0, (int)Math.Min(buffer.Length, RemainingAllowedLength + 1))); | ||
| MovePosition(read); | ||
| return read; | ||
| } | ||
|
|
||
| public override async ValueTask<int> ReadAsync(Memory<byte> buffer, CancellationToken cancellationToken = default) | ||
| { | ||
| var read = await innerStream.ReadAsync(buffer.Slice(0, (int)Math.Min(buffer.Length, RemainingAllowedLength + 1)), cancellationToken); | ||
| MovePosition(read); | ||
| return read; | ||
| } | ||
| #endif | ||
| public override long Seek(long offset, SeekOrigin origin) => throw new System.NotImplementedException(); | ||
| public override void SetLength(long value) => throw new System.NotImplementedException(); | ||
| public override void Write(byte[] buffer, int offset, int count) => throw new System.NotImplementedException(); | ||
|
|
||
| public static Stream LimitLength(Stream s, long maxLength, string errorComment) | ||
| { | ||
| if (maxLength < 0 || maxLength == long.MaxValue) | ||
| return s; | ||
|
|
||
| if (s.CanSeek) | ||
| { | ||
| if (s.Length > maxLength) | ||
| throw new InvalidOperationException($"The stream is limited to {maxLength} bytes: {errorComment}"); | ||
| return s; | ||
| } | ||
| else | ||
| { | ||
| return new LimitLengthStream(s, maxLength, errorComment); | ||
| } | ||
| } | ||
| } | ||
| } |
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