mirror of
https://github.com/idanoo/GoScrobble.git
synced 2024-11-24 09:25:15 +00:00
258 lines
8.2 KiB
Markdown
258 lines
8.2 KiB
Markdown
# Path-to-RegExp
|
|
|
|
> Turn an Express-style path string such as `/user/:name` into a regular expression.
|
|
|
|
[![NPM version][npm-image]][npm-url]
|
|
[![Build status][travis-image]][travis-url]
|
|
[![Test coverage][coveralls-image]][coveralls-url]
|
|
[![Dependency Status][david-image]][david-url]
|
|
[![License][license-image]][license-url]
|
|
[![Downloads][downloads-image]][downloads-url]
|
|
|
|
## Installation
|
|
|
|
```
|
|
npm install path-to-regexp --save
|
|
```
|
|
|
|
## Usage
|
|
|
|
```javascript
|
|
var pathToRegexp = require('path-to-regexp')
|
|
|
|
// pathToRegexp(path, keys, options)
|
|
// pathToRegexp.parse(path)
|
|
// pathToRegexp.compile(path)
|
|
```
|
|
|
|
- **path** An Express-style string, an array of strings, or a regular expression.
|
|
- **keys** An array to be populated with the keys found in the path.
|
|
- **options**
|
|
- **sensitive** When `true` the route will be case sensitive. (default: `false`)
|
|
- **strict** When `false` the trailing slash is optional. (default: `false`)
|
|
- **end** When `false` the path will match at the beginning. (default: `true`)
|
|
- **delimiter** Set the default delimiter for repeat parameters. (default: `'/'`)
|
|
|
|
```javascript
|
|
var keys = []
|
|
var re = pathToRegexp('/foo/:bar', keys)
|
|
// re = /^\/foo\/([^\/]+?)\/?$/i
|
|
// keys = [{ name: 'bar', prefix: '/', delimiter: '/', optional: false, repeat: false, pattern: '[^\\/]+?' }]
|
|
```
|
|
|
|
**Please note:** The `RegExp` returned by `path-to-regexp` is intended for use with pathnames or hostnames. It can not handle the query strings or fragments of a URL.
|
|
|
|
### Parameters
|
|
|
|
The path string can be used to define parameters and populate the keys.
|
|
|
|
#### Named Parameters
|
|
|
|
Named parameters are defined by prefixing a colon to the parameter name (`:foo`). By default, the parameter will match until the following path segment.
|
|
|
|
```js
|
|
var re = pathToRegexp('/:foo/:bar', keys)
|
|
// keys = [{ name: 'foo', prefix: '/', ... }, { name: 'bar', prefix: '/', ... }]
|
|
|
|
re.exec('/test/route')
|
|
//=> ['/test/route', 'test', 'route']
|
|
```
|
|
|
|
**Please note:** Named parameters must be made up of "word characters" (`[A-Za-z0-9_]`).
|
|
|
|
```js
|
|
var re = pathToRegexp('/(apple-)?icon-:res(\\d+).png', keys)
|
|
// keys = [{ name: 0, prefix: '/', ... }, { name: 'res', prefix: '', ... }]
|
|
|
|
re.exec('/icon-76.png')
|
|
//=> ['/icon-76.png', undefined, '76']
|
|
```
|
|
|
|
#### Modified Parameters
|
|
|
|
##### Optional
|
|
|
|
Parameters can be suffixed with a question mark (`?`) to make the parameter optional. This will also make the prefix optional.
|
|
|
|
```js
|
|
var re = pathToRegexp('/:foo/:bar?', keys)
|
|
// keys = [{ name: 'foo', ... }, { name: 'bar', delimiter: '/', optional: true, repeat: false }]
|
|
|
|
re.exec('/test')
|
|
//=> ['/test', 'test', undefined]
|
|
|
|
re.exec('/test/route')
|
|
//=> ['/test', 'test', 'route']
|
|
```
|
|
|
|
##### Zero or more
|
|
|
|
Parameters can be suffixed with an asterisk (`*`) to denote a zero or more parameter matches. The prefix is taken into account for each match.
|
|
|
|
```js
|
|
var re = pathToRegexp('/:foo*', keys)
|
|
// keys = [{ name: 'foo', delimiter: '/', optional: true, repeat: true }]
|
|
|
|
re.exec('/')
|
|
//=> ['/', undefined]
|
|
|
|
re.exec('/bar/baz')
|
|
//=> ['/bar/baz', 'bar/baz']
|
|
```
|
|
|
|
##### One or more
|
|
|
|
Parameters can be suffixed with a plus sign (`+`) to denote a one or more parameter matches. The prefix is taken into account for each match.
|
|
|
|
```js
|
|
var re = pathToRegexp('/:foo+', keys)
|
|
// keys = [{ name: 'foo', delimiter: '/', optional: false, repeat: true }]
|
|
|
|
re.exec('/')
|
|
//=> null
|
|
|
|
re.exec('/bar/baz')
|
|
//=> ['/bar/baz', 'bar/baz']
|
|
```
|
|
|
|
#### Custom Match Parameters
|
|
|
|
All parameters can be provided a custom regexp, which overrides the default (`[^\/]+`).
|
|
|
|
```js
|
|
var re = pathToRegexp('/:foo(\\d+)', keys)
|
|
// keys = [{ name: 'foo', ... }]
|
|
|
|
re.exec('/123')
|
|
//=> ['/123', '123']
|
|
|
|
re.exec('/abc')
|
|
//=> null
|
|
```
|
|
|
|
**Please note:** Backslashes need to be escaped with another backslash in strings.
|
|
|
|
#### Unnamed Parameters
|
|
|
|
It is possible to write an unnamed parameter that only consists of a matching group. It works the same as a named parameter, except it will be numerically indexed.
|
|
|
|
```js
|
|
var re = pathToRegexp('/:foo/(.*)', keys)
|
|
// keys = [{ name: 'foo', ... }, { name: 0, ... }]
|
|
|
|
re.exec('/test/route')
|
|
//=> ['/test/route', 'test', 'route']
|
|
```
|
|
|
|
#### Asterisk
|
|
|
|
An asterisk can be used for matching everything. It is equivalent to an unnamed matching group of `(.*)`.
|
|
|
|
```js
|
|
var re = pathToRegexp('/foo/*', keys)
|
|
// keys = [{ name: '0', ... }]
|
|
|
|
re.exec('/foo/bar/baz')
|
|
//=> ['/foo/bar/baz', 'bar/baz']
|
|
```
|
|
|
|
### Parse
|
|
|
|
The parse function is exposed via `pathToRegexp.parse`. This will return an array of strings and keys.
|
|
|
|
```js
|
|
var tokens = pathToRegexp.parse('/route/:foo/(.*)')
|
|
|
|
console.log(tokens[0])
|
|
//=> "/route"
|
|
|
|
console.log(tokens[1])
|
|
//=> { name: 'foo', prefix: '/', delimiter: '/', optional: false, repeat: false, pattern: '[^\\/]+?' }
|
|
|
|
console.log(tokens[2])
|
|
//=> { name: 0, prefix: '/', delimiter: '/', optional: false, repeat: false, pattern: '.*' }
|
|
```
|
|
|
|
**Note:** This method only works with Express-style strings.
|
|
|
|
### Compile ("Reverse" Path-To-RegExp)
|
|
|
|
Path-To-RegExp exposes a compile function for transforming an Express-style path into a valid path.
|
|
|
|
```js
|
|
var toPath = pathToRegexp.compile('/user/:id')
|
|
|
|
toPath({ id: 123 }) //=> "/user/123"
|
|
toPath({ id: 'café' }) //=> "/user/caf%C3%A9"
|
|
toPath({ id: '/' }) //=> "/user/%2F"
|
|
|
|
toPath({ id: ':' }) //=> "/user/%3A"
|
|
toPath({ id: ':' }, { pretty: true }) //=> "/user/:"
|
|
|
|
var toPathRepeated = pathToRegexp.compile('/:segment+')
|
|
|
|
toPathRepeated({ segment: 'foo' }) //=> "/foo"
|
|
toPathRepeated({ segment: ['a', 'b', 'c'] }) //=> "/a/b/c"
|
|
|
|
var toPathRegexp = pathToRegexp.compile('/user/:id(\\d+)')
|
|
|
|
toPathRegexp({ id: 123 }) //=> "/user/123"
|
|
toPathRegexp({ id: '123' }) //=> "/user/123"
|
|
toPathRegexp({ id: 'abc' }) //=> Throws `TypeError`.
|
|
```
|
|
|
|
**Note:** The generated function will throw on invalid input. It will do all necessary checks to ensure the generated path is valid. This method only works with strings.
|
|
|
|
### Working with Tokens
|
|
|
|
Path-To-RegExp exposes the two functions used internally that accept an array of tokens.
|
|
|
|
* `pathToRegexp.tokensToRegExp(tokens, options)` Transform an array of tokens into a matching regular expression.
|
|
* `pathToRegexp.tokensToFunction(tokens)` Transform an array of tokens into a path generator function.
|
|
|
|
#### Token Information
|
|
|
|
* `name` The name of the token (`string` for named or `number` for index)
|
|
* `prefix` The prefix character for the segment (`/` or `.`)
|
|
* `delimiter` The delimiter for the segment (same as prefix or `/`)
|
|
* `optional` Indicates the token is optional (`boolean`)
|
|
* `repeat` Indicates the token is repeated (`boolean`)
|
|
* `partial` Indicates this token is a partial path segment (`boolean`)
|
|
* `pattern` The RegExp used to match this token (`string`)
|
|
* `asterisk` Indicates the token is an `*` match (`boolean`)
|
|
|
|
## Compatibility with Express <= 4.x
|
|
|
|
Path-To-RegExp breaks compatibility with Express <= `4.x`:
|
|
|
|
* No longer a direct conversion to a RegExp with sugar on top - it's a path matcher with named and unnamed matching groups
|
|
* It's unlikely you previously abused this feature, it's rare and you could always use a RegExp instead
|
|
* All matching RegExp special characters can be used in a matching group. E.g. `/:user(.*)`
|
|
* Other RegExp features are not support - no nested matching groups, non-capturing groups or look aheads
|
|
* Parameters have suffixes that augment meaning - `*`, `+` and `?`. E.g. `/:user*`
|
|
|
|
## TypeScript
|
|
|
|
Includes a [`.d.ts`](index.d.ts) file for TypeScript users.
|
|
|
|
## Live Demo
|
|
|
|
You can see a live demo of this library in use at [express-route-tester](http://forbeslindesay.github.com/express-route-tester/).
|
|
|
|
## License
|
|
|
|
MIT
|
|
|
|
[npm-image]: https://img.shields.io/npm/v/path-to-regexp.svg?style=flat
|
|
[npm-url]: https://npmjs.org/package/path-to-regexp
|
|
[travis-image]: https://img.shields.io/travis/pillarjs/path-to-regexp.svg?style=flat
|
|
[travis-url]: https://travis-ci.org/pillarjs/path-to-regexp
|
|
[coveralls-image]: https://img.shields.io/coveralls/pillarjs/path-to-regexp.svg?style=flat
|
|
[coveralls-url]: https://coveralls.io/r/pillarjs/path-to-regexp?branch=master
|
|
[david-image]: http://img.shields.io/david/pillarjs/path-to-regexp.svg?style=flat
|
|
[david-url]: https://david-dm.org/pillarjs/path-to-regexp
|
|
[license-image]: http://img.shields.io/npm/l/path-to-regexp.svg?style=flat
|
|
[license-url]: LICENSE.md
|
|
[downloads-image]: http://img.shields.io/npm/dm/path-to-regexp.svg?style=flat
|
|
[downloads-url]: https://npmjs.org/package/path-to-regexp
|