fast-uri

Dependency-free RFC 3986 URI toolbox.

Usage

Options

All of the above functions can accept an additional options argument that is an object that can contain one or more of the following properties:

Malformed authorities and out-of-range ports are reported through the parsed component’s error field. normalize() leaves malformed string inputs unchanged, and equal() returns false when either string input is malformed.

Schemes are never percent-decoded. RFC 3986 does not allow percent-encoding in a scheme, so an input such as %6Aavascript:alert(1) is reported as malformed (error: 'URI scheme is malformed.') instead of being parsed as javascript:. normalize() leaves it unchanged, equal() returns false, and resolve() and serialize() throw.

For schemes with domain hosts (http, https, ws, wss, or any scheme with the domainHost option), a host containing an ASCII character that RFC 3986 does not allow in a reg-name (for example @, TAB, LF, CR, space, ", <, >, ^, `, {, |, }) is reported as malformed (error: 'URI host is malformed.'). It is never passed through a WHATWG URL parser that could treat @ as a delimiter or strip whitespace. normalize() leaves such input unchanged, equal() returns false, and resolve() throws.

scheme (string) Indicates the scheme that the URI should be treated as, overriding the URI’s normal scheme parsing behavior.
reference (string) If set to "suffix", it indicates that the URI is in the suffix format and the parser will use the option’s scheme property to determine the URI’s scheme.

A suffix reference is written without its scheme and without the // authority marker (RFC 3986 section 4.5). Such a reference is inherently ambiguous: an authority component cannot always be distinguished from a path. When the input carries an authority of the form host:port (for example //javascript:80/x) or a userinfo containing a colon, the serialized suffix output can begin with text that reparses as a URI scheme (for example javascript:80/x). Do not treat suffix output as a trusted absolute URL, and do not render it or use it in a scheme allowlist without first validating it with parse(). If you need an unambiguous result, use the default (non-suffix) serialization.
tolerant (boolean, false) If set to true, the parser will relax URI resolving rules.
absolutePath (boolean, false) If set to true, the serializer will not resolve a relative path component.
unicodeSupport (boolean, false) If set to true, the parser will unescape non-ASCII characters in the parsed output as per RFC 3987.
domainHost (boolean, false) If set to true, the library will treat the host component as a domain name, and convert IDNs (International Domain Names) as per RFC 5891.

Parse

const uri = require('fast-uri')
uri.parse('uri://user:pass@example.com:123/one/two.three?q1=a1&q2=a2#body')
// Output
{
  scheme: "uri",
  userinfo: "user:pass",
  host: "example.com",
  port: 123,
  path: "/one/two.three",
  query: "q1=a1&q2=a2",
  fragment: "body"
}

Serialize

const uri = require('fast-uri')
uri.serialize({scheme: "http", host: "example.com", fragment: "footer"})
// Output
"http://example.com/#footer"

Resolve

const uri = require('fast-uri')
uri.resolve("uri://a/b/c/d?q", "../../g")
// Output
"uri://a/g"

Normalize

const uri = require('fast-uri')
uri.normalize('http://example.com/a%2Fb')
// Output
"http://example.com/a%2Fb"

Reserved path escapes such as %2F and %2E are preserved as path data during normalization and comparison.

Dot segments in relative references are removed without changing what the reference resolves to: leading .. segments that cannot be collapsed are kept, a relative path is never turned into a root-relative one, and a first-segment colon exposed by the removal is kept behind a leading ./ so the reference is not reparsed as a scheme (a/../b → b, ../x → ../x, x/.. → ./, a/../a:b → ./a:b).

Equal

const uri = require('fast-uri')
uri.equal("example://a/b/c/%7Bfoo%7D", "eXAMPLE://a/./b/../b/%63/%7bfoo%7d")
// Output
true

Scheme supports

fast-uri supports inserting custom scheme-dependent processing rules. Currently, fast-uri has built-in support for the following schemes:

http [RFC 2616]
https [RFC 2818]
ws [RFC 6455]
wss [RFC 6455]
urn [RFC 2141]
urn:uuid [RFC 4122]

Benchmarks

fast-uri benchmark
┌─────────┬──────────────────────────────────────────┬──────────────────┬──────────────────┬────────────────────────┬────────────────────────┬─────────┐
│ (index) │ Task name                                │ Latency avg (ns) │ Latency med (ns) │ Throughput avg (ops/s) │ Throughput med (ops/s) │ Samples │
├─────────┼──────────────────────────────────────────┼──────────────────┼──────────────────┼────────────────────────┼────────────────────────┼─────────┤
│ 0       │ 'fast-uri: parse domain'                 │ '951.31 ± 0.75%' │ '875.00 ± 11.00' │ '1122538 ± 0.01%'      │ '1142857 ± 14550'      │ 1051187 │
│ 1       │ 'fast-uri: parse IPv4'                   │ '443.44 ± 0.22%' │ '406.00 ± 3.00'  │ '2422762 ± 0.01%'      │ '2463054 ± 18335'      │ 2255105 │
│ 2       │ 'fast-uri: parse IPv6'                   │ '1241.6 ± 1.74%' │ '1131.0 ± 30.00' │ '875177 ± 0.02%'       │ '884173 ± 24092'       │ 805399  │
│ 3       │ 'fast-uri: parse URN'                    │ '689.19 ± 4.29%' │ '618.00 ± 9.00'  │ '1598373 ± 0.01%'      │ '1618123 ± 23913'      │ 1450972 │
│ 4       │ 'fast-uri: parse URN uuid'               │ '1025.4 ± 2.02%' │ '921.00 ± 19.00' │ '1072419 ± 0.02%'      │ '1085776 ± 22871'      │ 975236  │
│ 5       │ 'fast-uri: serialize uri'                │ '1028.5 ± 0.53%' │ '933.00 ± 43.00' │ '1063310 ± 0.02%'      │ '1071811 ± 50523'      │ 972249  │
│ 6       │ 'fast-uri: serialize long uri with dots' │ '1805.1 ± 0.52%' │ '1627.0 ± 17.00' │ '602620 ± 0.02%'       │ '614628 ± 6490'        │ 553997  │
│ 7       │ 'fast-uri: serialize IPv6'               │ '2569.4 ± 2.69%' │ '2302.0 ± 21.00' │ '426080 ± 0.03%'       │ '434405 ± 3999'        │ 389194  │
│ 8       │ 'fast-uri: serialize ws'                 │ '979.39 ± 0.43%' │ '882.00 ± 8.00'  │ '1111665 ± 0.02%'      │ '1133787 ± 10378'      │ 1021045 │
│ 9       │ 'fast-uri: resolve'                      │ '2208.2 ± 1.08%' │ '1980.0 ± 24.00' │ '495001 ± 0.03%'       │ '505051 ± 6049'        │ 452848  │
└─────────┴──────────────────────────────────────────┴──────────────────┴──────────────────┴────────────────────────┴────────────────────────┴─────────┘
uri-js benchmark
┌─────────┬───────────────────────────────────────┬──────────────────┬──────────────────┬────────────────────────┬────────────────────────┬─────────┐
│ (index) │ Task name                             │ Latency avg (ns) │ Latency med (ns) │ Throughput avg (ops/s) │ Throughput med (ops/s) │ Samples │
├─────────┼───────────────────────────────────────┼──────────────────┼──────────────────┼────────────────────────┼────────────────────────┼─────────┤
│ 0       │ 'urijs: parse domain'                 │ '3618.3 ± 0.43%' │ '3314.0 ± 33.00' │ '294875 ± 0.04%'       │ '301750 ± 2975'        │ 276375  │
│ 1       │ 'urijs: parse IPv4'                   │ '4024.1 ± 0.41%' │ '3751.0 ± 25.00' │ '261981 ± 0.04%'       │ '266596 ± 1789'        │ 248506  │
│ 2       │ 'urijs: parse IPv6'                   │ '5417.2 ± 0.46%' │ '4968.0 ± 43.00' │ '196023 ± 0.05%'       │ '201288 ± 1727'        │ 184598  │
│ 3       │ 'urijs: parse URN'                    │ '1324.2 ± 0.23%' │ '1229.0 ± 17.00' │ '801535 ± 0.02%'       │ '813670 ± 11413'       │ 755185  │
│ 4       │ 'urijs: parse URN uuid'               │ '1822.0 ± 3.08%' │ '1655.0 ± 15.00' │ '594433 ± 0.02%'       │ '604230 ± 5427'        │ 548843  │
│ 5       │ 'urijs: serialize uri'                │ '4196.8 ± 0.36%' │ '3908.0 ± 27.00' │ '251146 ± 0.04%'       │ '255885 ± 1756'        │ 238276  │
│ 6       │ 'urijs: serialize long uri with dots' │ '8331.0 ± 1.30%' │ '7658.0 ± 72.00' │ '126440 ± 0.07%'       │ '130582 ± 1239'        │ 120034  │
│ 7       │ 'urijs: serialize IPv6'               │ '5685.5 ± 0.30%' │ '5366.0 ± 33.00' │ '182632 ± 0.05%'       │ '186359 ± 1153'        │ 175886  │
│ 8       │ 'urijs: serialize ws'                 │ '4159.3 ± 0.20%' │ '3899.0 ± 28.00' │ '250459 ± 0.04%'       │ '256476 ± 1855'        │ 240423  │
│ 9       │ 'urijs: resolve'                      │ '6729.9 ± 0.39%' │ '6261.0 ± 37.00' │ '156361 ± 0.06%'       │ '159719 ± 949'         │ 148591  │
└─────────┴───────────────────────────────────────┴──────────────────┴──────────────────┴────────────────────────┴────────────────────────┴─────────┘
WHATWG URL benchmark
┌─────────┬────────────────────────────┬──────────────────┬──────────────────┬────────────────────────┬────────────────────────┬─────────┐
│ (index) │ Task name                  │ Latency avg (ns) │ Latency med (ns) │ Throughput avg (ops/s) │ Throughput med (ops/s) │ Samples │
├─────────┼────────────────────────────┼──────────────────┼──────────────────┼────────────────────────┼────────────────────────┼─────────┤
│ 0       │ 'WHATWG URL: parse domain' │ '475.22 ± 0.20%' │ '444.00 ± 5.00'  │ '2217599 ± 0.01%'      │ '2252252 ± 25652'      │ 2104289 │
│ 1       │ 'WHATWG URL: parse URN'    │ '384.78 ± 0.85%' │ '350.00 ± 5.00'  │ '2809071 ± 0.01%'      │ '2857143 ± 41408'      │ 2598885 │
└─────────┴────────────────────────────┴──────────────────┴──────────────────┴────────────────────────┴────────────────────────┴─────────┘

TODO

Support MailTo
Be 100% iso compatible with uri-js

License

Licensed under BSD-3-Clause.

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