public static Http2HeadersRequest ParseHeaders(Http2Frame frame, ArraySegment <byte> data)
{
if (frame.type == Http2FrameType.Headers)
{
throw new InvalidOperationException("frame.type != Headers");
}
if (frame.length > data.Count)
{
return(null);
}
var req = new Http2HeadersRequest();
for (int i = 0; i < frame.length; i++)
{
var ch = data.ElementAt(i);
// 1 0 -> Indexed_HasNothing
if ((ch & 0x80) != 0)
{
req.hpackCommands.Add(HPackCommandFactory.Indexed(ch ^ 0x80));
}
// 0 1 -> Indexed_HasValue
else if ((ch & 0x40) != 0)
{
var length = data.ElementAt(i + 1);
var huff = (length & 0x80) != 0;
length &= 0x7F;
var payload = new byte[length];
Console.WriteLine("hUFF : " + huff.ToString());
Console.WriteLine("LEN : " + length.ToString());
Buffer.BlockCopy(data.Array, data.Offset + i + 2, payload, 0, length);
if (huff)
{
payload = Huffman.Convert.Decode(payload);
}
Console.WriteLine(Encoding.UTF8.GetString(payload));
req.hpackCommands.Add(
HPackCommandFactory.UpdateValue(ch ^ 0x40, Encoding.UTF8.GetString(payload)));
i += 1 + length;
}
}
return(req);
}
public Http2HeadersResponse BuildResponse(HttpResponse response)
{
var headers = new Http2HeadersResponse();
if (ResponseCode.OK == response.code)
{
headers.Add(HPackCommandFactory.Indexed(PredefinedIndexes.Status1));
}
else if (ResponseCode.BadRequest == response.code)
{
headers.Add(HPackCommandFactory.Indexed(PredefinedIndexes.Status400));
}
else if (ResponseCode.NotFound == response.code)
{
headers.Add(HPackCommandFactory.Indexed(PredefinedIndexes.Status404));
}
else if (ResponseCode.InternalServerError == response.code)
{
headers.Add(HPackCommandFactory.Indexed(PredefinedIndexes.Status500));
}
else
{
headers.Add(HPackCommandFactory.UpdateValue(PredefinedIndexes.Status1, ((int)response.code).ToString()));
}
foreach (var header in response.headers)
{
// 이미 캐싱된 키
if (tableByKey.ContainsKey(header.Key))
{
var item = tableByKey[header.Key];
// 값도 캐싱됨
if (item.strValue == header.Value)
{
headers.Add(HPackCommandFactory.Indexed(item.index));
}
else
{
headers.Add(HPackCommandFactory.UseIndexedKey(item.index, header.Value));
}
}
else
{
headers.Add(HPackCommandFactory.NotIndexing(header.Key, header.Value));
}
}
return(headers);
}