compcol 0.6.5

A no_std collection of compression algorithms behind a uniform streaming trait, gated per-algorithm by Cargo features.
Documentation 
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//! QPACK static table — RFC 9204 Appendix A.
//!
//! Unlike HPACK (whose static table is 1-indexed), QPACK's static table is
//! **0-indexed**: the first entry (`:authority`) is index 0. There are 99
//! entries (indices 0..=98). Transcribed verbatim from RFC 9204 Appendix A.

/// QPACK static table (RFC 9204 Appendix A), 99 `(name, value)` entries.
/// Index 0 is `STATIC_TABLE[0]`.
#[rustfmt::skip]
pub(crate) const STATIC_TABLE: [(&[u8], &[u8]); 99] = [
    (b":authority", b""),
    (b":path", b"/"),
    (b"age", b"0"),
    (b"content-disposition", b""),
    (b"content-length", b"0"),
    (b"cookie", b""),
    (b"date", b""),
    (b"etag", b""),
    (b"if-modified-since", b""),
    (b"if-none-match", b""),
    (b"last-modified", b""),
    (b"link", b""),
    (b"location", b""),
    (b"referer", b""),
    (b"set-cookie", b""),
    (b":method", b"CONNECT"),
    (b":method", b"DELETE"),
    (b":method", b"GET"),
    (b":method", b"HEAD"),
    (b":method", b"OPTIONS"),
    (b":method", b"POST"),
    (b":method", b"PUT"),
    (b":scheme", b"http"),
    (b":scheme", b"https"),
    (b":status", b"103"),
    (b":status", b"200"),
    (b":status", b"304"),
    (b":status", b"404"),
    (b":status", b"503"),
    (b"accept", b"*/*"),
    (b"accept", b"application/dns-message"),
    (b"accept-encoding", b"gzip, deflate, br"),
    (b"accept-ranges", b"bytes"),
    (b"access-control-allow-headers", b"cache-control"),
    (b"access-control-allow-headers", b"content-type"),
    (b"access-control-allow-origin", b"*"),
    (b"cache-control", b"max-age=0"),
    (b"cache-control", b"max-age=2592000"),
    (b"cache-control", b"max-age=604800"),
    (b"cache-control", b"no-cache"),
    (b"cache-control", b"no-store"),
    (b"cache-control", b"public, max-age=31536000"),
    (b"content-encoding", b"br"),
    (b"content-encoding", b"gzip"),
    (b"content-type", b"application/dns-message"),
    (b"content-type", b"application/javascript"),
    (b"content-type", b"application/json"),
    (b"content-type", b"application/x-www-form-urlencoded"),
    (b"content-type", b"image/gif"),
    (b"content-type", b"image/jpeg"),
    (b"content-type", b"image/png"),
    (b"content-type", b"text/css"),
    (b"content-type", b"text/html; charset=utf-8"),
    (b"content-type", b"text/plain"),
    (b"content-type", b"text/plain;charset=utf-8"),
    (b"range", b"bytes=0-"),
    (b"strict-transport-security", b"max-age=31536000"),
    (b"strict-transport-security", b"max-age=31536000; includesubdomains"),
    (b"strict-transport-security", b"max-age=31536000; includesubdomains; preload"),
    (b"vary", b"accept-encoding"),
    (b"vary", b"origin"),
    (b"x-content-type-options", b"nosniff"),
    (b"x-xss-protection", b"1; mode=block"),
    (b":status", b"100"),
    (b":status", b"204"),
    (b":status", b"206"),
    (b":status", b"302"),
    (b":status", b"400"),
    (b":status", b"403"),
    (b":status", b"421"),
    (b":status", b"425"),
    (b":status", b"500"),
    (b"accept-language", b""),
    (b"access-control-allow-credentials", b"FALSE"),
    (b"access-control-allow-credentials", b"TRUE"),
    (b"access-control-allow-headers", b"*"),
    (b"access-control-allow-methods", b"get"),
    (b"access-control-allow-methods", b"get, post, options"),
    (b"access-control-allow-methods", b"options"),
    (b"access-control-expose-headers", b"content-length"),
    (b"access-control-request-headers", b"content-type"),
    (b"access-control-request-method", b"get"),
    (b"access-control-request-method", b"post"),
    (b"alt-svc", b"clear"),
    (b"authorization", b""),
    (b"content-security-policy", b"script-src 'none'; object-src 'none'; base-uri 'none'"),
    (b"early-data", b"1"),
    (b"expect-ct", b""),
    (b"forwarded", b""),
    (b"if-range", b""),
    (b"origin", b""),
    (b"purpose", b"prefetch"),
    (b"server", b""),
    (b"timing-allow-origin", b"*"),
    (b"upgrade-insecure-requests", b"1"),
    (b"user-agent", b""),
    (b"x-forwarded-for", b""),
    (b"x-frame-options", b"deny"),
    (b"x-frame-options", b"sameorigin"),
];

/// Number of static-table entries (99).
#[cfg(test)]
pub(crate) const STATIC_LEN: usize = STATIC_TABLE.len();

/// Look up a 0-based static-table index. Returns `(name, value)`.
pub(crate) fn get(index: usize) -> Option<(&'static [u8], &'static [u8])> {
    STATIC_TABLE.get(index).copied()
}

/// Find the best static-table entry for `(name, value)`: prefer a full
/// name+value match (returning `value_matched = true`), else a name-only
/// match. Returns `(index, value_matched)`.
pub(crate) fn find(name: &[u8], value: &[u8]) -> Option<(usize, bool)> {
    let mut name_only: Option<usize> = None;
    for (i, (n, v)) in STATIC_TABLE.iter().enumerate() {
        if *n == name {
            if *v == value {
                return Some((i, true));
            }
            name_only.get_or_insert(i);
        }
    }
    name_only.map(|i| (i, false))
}