Module hpack 

HPACK header compression for HTTP/2 (RFC 7541).

Implements the HPACK header compression algorithm used in HTTP/2 HEADERS frames. Includes:

• Static table (61 entries per RFC 7541 Appendix A)
• Dynamic table with eviction
• Integer encoding/decoding with N-bit prefix
• String literal encoding/decoding
• Huffman encoding/decoding (RFC 7541 Appendix B)
• HpackDecoder and HpackEncoder types

Structs

HpackDecoder

HPACK decoder with dynamic table state.

HpackEncoder

HPACK encoder.

Constants

HUFFMAN_TABLE

Full Huffman code table from RFC 7541 Appendix B. Index is the symbol value (0-255 for bytes, 256 for EOS). Each entry is (code: u32, nbits: u8).

STATIC_TABLE

Static HPACK table from RFC 7541 Appendix A. 61 entries, 1-indexed in the spec (index 0 here = spec index 1).

Functions

decode_integer

Decode an HPACK integer with N-bit prefix.

decode_string

Decode a string literal from an HPACK-encoded buffer.

encode_integer

Encode an HPACK integer with N-bit prefix.

encode_string_huffman

Encode a string literal with Huffman coding if beneficial.

encode_string_literal

Encode a string literal without Huffman coding.

huffman_decode

Decode Huffman-encoded data (RFC 7541 Appendix B).

huffman_encode

Encode data using Huffman coding (RFC 7541 Appendix B).