internal/

Package appconfig hands request hot paths the few Config bits they read on every call, without the copy App.Config returns by value.

Package byterange adds the Range and If-Range rules (RFC 9110 §13.1.5, §14.2) that fasthttp's file server lacks: it refuses several ranges with 416, takes only a lower-case "bytes" unit, applies Range to HEAD and ignores If-Range.

Package clocktest lets tests wait on the cached, second-granularity clock that fiber's memory storages and rate-limit windows are measured against.

Package cookie centralizes cookie policy shared by Fiber core and middleware.

Package crosshost names the request headers that must not survive a redirect to a host other than the one they were sent to.

Package ctxlocal stores request locals without the allocation a variadic Locals call through the Ctx interface costs.

Package etag parses and compares HTTP entity tags (RFC 9110 Section 8.8.3).

Package fieldname reads and removes HTTP header fields by name case-insensitively (RFC 9110 §5.1).

Package headerlist walks the comma-separated list values that RFC 9110 Section 5.6.1 defines, and joins the field lines that Section 5.3 says are equivalent to one.

Package headerlookup answers, for a caller holding a fiber.Ctx, the two questions the byte-exact header API cannot: whether the stored field names are canonical, and what a named request header holds if they are not.

Package idnafold converts a Unicode hostname label to the Punycode form a browser puts on the wire (RFC 5891), so a hostname literal written in source still matches the requests that name actually generates.

Package loggertest provides shared helpers for the middleware ctx-logger integration tests.

Package mediatype parses media types and their parameters (RFC 9110 Section 8.3.1), and canonicalizes the case-insensitive parts of a request's Content-Type, so the case-sensitive parsers downstream — fasthttp's form and multipart readers above all — see the value they expect.

Package memory provides a high-performance in-memory storage that can store any type without encoding overhead.

Package origin validates and matches the serialized origins that the CORS and CSRF middleware compare against their configured allow lists.

Package paramdelim holds the byte set that ends a ":name" placeholder in a path.

Package quotedstring encodes values placed inside HTTP quoted strings.

Package redact provides common helpers for masking sensitive values in log output.

Package rulematch provides capture substitution shared by redirect and rewrite rules.

Package schemehost compares the scheme and host of two URLs for same-origin checks.

Package urlnorm applies the parts of the WHATWG URL parser's input handling a guard must apply before judging a URL Fiber is about to emit.

Package wiretarget spells the path the router matched the way a request line carries it, for middleware that hands the request on to something that reads request lines: a proxy upstream, a net/http handler.