public HeaderReader(
HPack.Decoder hpackDecoder,
uint maxFrameSize, uint maxHeaderFieldsSize,
IReadableByteStream reader
)
{
this.reader = reader;
this.hpackDecoder = hpackDecoder;
this.maxFrameSize = maxFrameSize;
this.maxHeaderFieldsSize = maxHeaderFieldsSize;
}
/// <summary>
/// 使用给定的解码器解码整个头块片段。
/// </summary>
/// <param name="decoder"></param>
/// <param name="buffer"></param>
/// <param name="maxHeaderFieldsSize"></param>
/// <param name="headers"></param>
/// <returns></returns>
public static DecodeFragmentResult DecodeHeaderBlockFragment(
this HPack.Decoder decoder,
ArraySegment <byte> buffer,
uint maxHeaderFieldsSize,
List <HeaderField> headers)
{
int offset = buffer.Offset;
int length = buffer.Count;
uint headersSize = 0;
try
{
while (length > 0)
{
var segment = new ArraySegment <byte>(buffer.Array, offset, length);
var consumed = decoder.Decode(segment);
offset += consumed;
length -= consumed;
if (decoder.Done)
{
headersSize += (uint)decoder.HeaderSize;
if (headersSize > maxHeaderFieldsSize)
{
headersSize -= (uint)decoder.HeaderSize;
return(new DecodeFragmentResult
{
Status = DecodeStatus.MaxHeaderListSizeExceeded,
HeaderFieldsSize = headersSize,
});
}
headers.Add(decoder.HeaderField);
}
}
}
catch (Exception)
{
return(new DecodeFragmentResult
{
Status = DecodeStatus.InvalidHeaderBlockFragment,
HeaderFieldsSize = headersSize,
});
}
return(new DecodeFragmentResult
{
Status = DecodeStatus.Success,
HeaderFieldsSize = headersSize,
});
}
public static NameValueCollection UnpackHeaders(byte[] data, int maxHeaderSize, int maxHeaderTableSize)
{
var headers = new NameValueCollection();
// Decode Header Block Fragments
var hpackDecoder = new HPack.Decoder(maxHeaderSize, maxHeaderTableSize);
using (var binReader = new BinaryReader(new MemoryStream(data))) {
hpackDecoder.Decode(binReader, (name, value, sensitive) =>
headers.Add(
System.Text.Encoding.ASCII.GetString(name),
System.Text.Encoding.ASCII.GetString(value)));
hpackDecoder.EndHeaderBlock(); // this must be called to finalize the decoding process.
}
return(headers);
}
public static NameValueCollection UnpackHeaders (byte[] data, int maxHeaderSize, int maxHeaderTableSize)
{
var headers = new NameValueCollection ();
// Decode Header Block Fragments
var hpackDecoder = new HPack.Decoder (maxHeaderSize, maxHeaderTableSize);
using(var binReader = new BinaryReader (new MemoryStream (data))) {
hpackDecoder.Decode(binReader, (name, value, sensitive) =>
headers.Add (
System.Text.Encoding.ASCII.GetString (name),
System.Text.Encoding.ASCII.GetString (value)));
hpackDecoder.EndHeaderBlock(); // this must be called to finalize the decoding process.
}
return headers;
}
