@polka/url

Super fast, memoized req.url parser; not limited to Polka!

Parses the url from a IncomingMessage request. The returned object will always only contain the following keys: search, query, pathname, and raw.

Note: This library does not process protocol, hostname, port, etc.
This is because the incoming req.url value only begins with the path information.

Parsed requests will be mutated with a _parsedUrl key, containing the returned output. This is used for future memoization, avoiding the need to fully parse the same url value multiple times.

Install

$ npm install --save @polka/url

Usage

const parse = require('@polka/url');

let req = {
  url: '/foo/bar?fizz=buzz'
};
let output = parse(req);
//=> {
//=>   pathname: '/foo/bar',
//=>   raw: '/foo/bar?fizz=buzz',
//=>   search: '?fizz=buzz',
//=>   query: {
//=>     fizz: 'buzz'
//=>   },
//=> }

// Attaches result for future memoization
assert.deepEqual(output, req._parsedUrl); //=> true

// Example with `toDecode` param
req = {
  url: '/f%C3%B8%C3%B8%C3%9F%E2%88%82r?phone=%2b8675309'
};
parse(req, true);
//=> {
//=>   pathname: '/føøß∂r',
//=>   raw: '/f%C3%B8%C3%B8%C3%9F%E2%88%82r?phone=%2b8675309',
//=>   search: '?phone=%2b8675309',
//=>   query: {
//=>     phone: '+8675309'
//=>   }
//=> }

// Attaches awareness key
assert(req._decoded); //=> true

API

url(req, toDecode?)

Returns: Object or undefined

Important: The req must have a url key, otherwise undefined will be returned.
If no input is provided at all, a TypeError will be thrown.

req

Type: IncomingMessage or { url: string }

The incoming HTTP request (req) or a plain Object with a url key.

Note: In Node.js servers, the req.url begins with a pathname & does not include a hash.

toDecode

Type: Boolean
Default: false

If enabled, the pathname will be fully decoded, via decodeURIComponent.

Important: Please note the following behaviors:

• raw is never decoded; this key reflects your original value
• pathname is decoded only when toDecode is enabled
• search is never decoded; this key reflects your original querystring value
• query is always decoded; even when toDecode is disabled

Additionally, the req is mutated with req._decoded = true so as to prevent repetitive decoding.

Benchmarks

Check out the bench directory for in-depth benchmark results and comparisons.

Support

Any issues or questions can be sent to the Polka repository.
However, please specify that your inquiry is about @polka/url specifically.

License

MIT © Luke Edwards