zerodds-hpack

Layer 5 — Bridges. HPACK (RFC 7541) header-compression codec for HTTP/2.

zerodds-hpack delivers the complete HPACK wire layer: variable- length integer (§5.1), string literals with optional static Huffman code from Appendix B (§5.2), the static table with all 61 Appendix A entries, the dynamic table with spec-§4 eviction semantics, and all four §6 header-field representations (indexed, literal- with-indexing, literal-without-indexing, literal-never-indexed). no_std + alloc, forbid(unsafe_code).

Spec anchors

  • RFC 7541 §2.3, §4, §5.1, §5.2, §6.1, §6.2.1, §6.2.2, §6.2.3, §6.3, Appendix A (static table), Appendix B (Huffman).

Layer position

Layer 5 — Bridges. Substrate for zerodds-http2 (HEADERS/CONTINUATION frame bodies) and zerodds-grpc-bridge (gRPC-over-HTTP/2 + gRPC-Web).

Quickstart

use zerodds_hpack::{Decoder, Encoder, HeaderField};

let mut encoder = Encoder::new();
let mut decoder = Decoder::new();

let headers = vec![
    HeaderField { name: ":method".into(), value: "GET".into() },
    HeaderField { name: ":scheme".into(), value: "https".into() },
    HeaderField { name: "custom-key".into(), value: "custom-value".into() },
];

let wire = encoder.encode(&headers);
let decoded = decoder.decode(&wire).expect("roundtrip");
assert_eq!(decoded, headers);

Feature flags

Feature Default Purpose
std ✅ std::error::Error for all error types.
alloc ✅ (via std) Vec / String / VecDeque.

no_std-capable: default-features = false, features = ["alloc"].

Stability

1.0.0-rc.3. Public API, wire format (RFC 7541) and error discriminants are RC1-stable; breaking changes require a major bump.

zerodds-hpack

Layer 5 — Bridges. HPACK (RFC 7541) Header-Compression-Codec fuer HTTP/2.

zerodds-hpack liefert die komplette HPACK-Wire-Schicht: Variable- Length-Integer (§5.1), String-Literals mit optionalem statischem Huffman-Code aus Appendix B (§5.2), Static-Table mit allen 61 Appendix-A-Eintraegen, Dynamic-Table mit Spec-§4-Eviction-Semantik und alle vier §6-Header-Field-Repraesentationen (Indexed, Literal- with-Indexing, Literal-without-Indexing, Literal-Never-Indexed). no_std + alloc, forbid(unsafe_code).

Spec-Anker

  • RFC 7541 §2.3, §4, §5.1, §5.2, §6.1, §6.2.1, §6.2.2, §6.2.3, §6.3, Appendix A (Static-Table), Appendix B (Huffman).

Schichten-Position

Layer 5 — Bridges. Substrat fuer zerodds-http2 (HEADERS-/CONTINUATION-Frame-Bodies) und zerodds-grpc-bridge (gRPC-over-HTTP/2 + gRPC-Web).

Quickstart

use zerodds_hpack::{Decoder, Encoder, HeaderField};

let mut encoder = Encoder::new();
let mut decoder = Decoder::new();

let headers = vec![
    HeaderField { name: ":method".into(), value: "GET".into() },
    HeaderField { name: ":scheme".into(), value: "https".into() },
    HeaderField { name: "custom-key".into(), value: "custom-value".into() },
];

let wire = encoder.encode(&headers);
let decoded = decoder.decode(&wire).expect("roundtrip");
assert_eq!(decoded, headers);

Feature-Flags

Feature Default Zweck
std ✅ std::error::Error fuer alle Fehler-Typen.
alloc ✅ (via std) Vec / String / VecDeque.

no_std-fahig: default-features = false, features = ["alloc"].

Stabilitaet

1.0.0-rc.3. Public-API, Wire-Format (RFC 7541) und Fehler- Diskriminanten sind RC1-stabil; Breaking-Changes erfordern Major- Bump.