private void CompressNonIndexed(string headerName, string headerValue, IndexationType headerType, byte prefix,
SizedHeadersList useHeadersTable)
{
int index = useHeadersTable.FindIndex(kv => kv.Key == headerName);
byte nameLenBinary = 0; // headers cant be more then 255 characters length
byte[] nameBinary = new byte[0];
//It's necessary to form result array because partial writeToOutput stream can cause problems because of multithreading
using (var stream = new MemoryStream(64))
{
byte[] indexBinary;
byte valueLenBinary;
byte[] valueBinary;
if (index != -1)
{
indexBinary = (index + 1).ToUVarInt(prefix);
}
else
{
indexBinary = 0.ToUVarInt(prefix);
nameBinary = Encoding.UTF8.GetBytes(headerName);
nameLenBinary = (byte)nameBinary.Length;
}
//Set without index type
indexBinary[0] |= (byte)headerType;
valueBinary = Encoding.UTF8.GetBytes(headerValue);
valueLenBinary = (byte)valueBinary.Length;
stream.Write(indexBinary, 0, indexBinary.Length);
//write replaced index. It's equal with the found index in our case
if (headerType == IndexationType.Substitution)
{
stream.Write(indexBinary, 0, indexBinary.Length);
}
if (index == -1)
{
stream.WriteByte(nameLenBinary);
stream.Write(nameBinary, 0, nameBinary.Length);
}
stream.WriteByte(valueLenBinary);
stream.Write(valueBinary, 0, valueBinary.Length);
WriteToOutput(stream.GetBuffer(), 0, (int)stream.Position);
}
ModifyTable(headerName, headerValue, headerType, useHeadersTable, index);
}
private void CompressIndexed(KeyValuePair<string, string> header, SizedHeadersList useHeadersTable)
{
int index = useHeadersTable.FindIndex(kv => kv.Key == header.Key && kv.Value == header.Value);
const byte prefix = 7;
var bytes = index.ToUVarInt(prefix);
//Set indexed type
bytes[0] |= (byte) IndexationType.Indexed;
WriteToOutput(bytes, 0, bytes.Length);
}