/// <summary>
/// Encode the header field into the header block.
/// The given <see cref="ICharSequence"/>s must be immutable!
/// </summary>
/// <param name="output"></param>
/// <param name="name"></param>
/// <param name="value"></param>
/// <param name="sensitive"></param>
/// <param name="headerSize"></param>
void EncodeHeader(IByteBuffer output, ICharSequence name, ICharSequence value, bool sensitive, long headerSize)
{
// If the header value is sensitive then it must never be indexed
if (sensitive)
{
int nameIndex = GetNameIndex(name);
EncodeLiteral(output, name, value, HpackUtil.IndexType.Never, nameIndex);
return;
}
// If the peer will only use the static table
if (0ul >= (ulong)_maxHeaderTableSize)
{
int staticTableIndex = HpackStaticTable.GetIndexInsensitive(name, value);
if (staticTableIndex == -1)
{
int nameIndex = HpackStaticTable.GetIndex(name);
EncodeLiteral(output, name, value, HpackUtil.IndexType.None, nameIndex);
}
else
{
EncodeInteger(output, 0x80, 7, staticTableIndex);
}
return;
}
// If the headerSize is greater than the max table size then it must be encoded literally
if (headerSize > _maxHeaderTableSize)
{
int nameIndex = GetNameIndex(name);
EncodeLiteral(output, name, value, HpackUtil.IndexType.None, nameIndex);
return;
}
HeaderEntry headerField = GetEntryInsensitive(name, value);
if (headerField is object)
{
int index = GetIndex(headerField.Index) + HpackStaticTable.Length;
// Section 6.1. Indexed Header Field Representation
EncodeInteger(output, 0x80, 7, index);
}
else
{
int staticTableIndex = HpackStaticTable.GetIndexInsensitive(name, value);
if (staticTableIndex != -1)
{
// Section 6.1. Indexed Header Field Representation
EncodeInteger(output, 0x80, 7, staticTableIndex);
}
else
{
EnsureCapacity(headerSize);
EncodeLiteral(output, name, value, HpackUtil.IndexType.Incremental, GetNameIndex(name));
Add(name, value, headerSize);
}
}
}
int GetNameIndex(ICharSequence name)
{
int index = HpackStaticTable.GetIndex(name);
if (index == -1)
{
index = GetIndex(name);
if (index >= 0)
{
index += HpackStaticTable.Length;
}
}
return(index);
}