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# parseurl
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[![NPM Version][npm-version-image]][npm-url]
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[![NPM Downloads][npm-downloads-image]][npm-url]
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[![Node.js Version][node-image]][node-url]
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[![Build Status][travis-image]][travis-url]
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[![Test Coverage][coveralls-image]][coveralls-url]
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Parse a URL with memoization.
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## Install
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This is a [Node.js](https://nodejs.org/en/) module available through the
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[npm registry](https://www.npmjs.com/). Installation is done using the
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[`npm install` command](https://docs.npmjs.com/getting-started/installing-npm-packages-locally):
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```sh
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$ npm install parseurl
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```
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## API
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```js
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var parseurl = require('parseurl')
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```
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### parseurl(req)
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Parse the URL of the given request object (looks at the `req.url` property)
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and return the result. The result is the same as `url.parse` in Node.js core.
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Calling this function multiple times on the same `req` where `req.url` does
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not change will return a cached parsed object, rather than parsing again.
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### parseurl.original(req)
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Parse the original URL of the given request object and return the result.
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This works by trying to parse `req.originalUrl` if it is a string, otherwise
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parses `req.url`. The result is the same as `url.parse` in Node.js core.
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Calling this function multiple times on the same `req` where `req.originalUrl`
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does not change will return a cached parsed object, rather than parsing again.
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## Benchmark
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```bash
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$ npm run-script bench
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> parseurl@1.3.3 bench nodejs-parseurl
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> node benchmark/index.js
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http_parser@2.8.0
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node@10.6.0
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v8@6.7.288.46-node.13
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uv@1.21.0
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zlib@1.2.11
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ares@1.14.0
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modules@64
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nghttp2@1.32.0
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napi@3
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openssl@1.1.0h
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icu@61.1
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unicode@10.0
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cldr@33.0
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tz@2018c
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> node benchmark/fullurl.js
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Parsing URL "http://localhost:8888/foo/bar?user=tj&pet=fluffy"
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4 tests completed.
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fasturl x 2,207,842 ops/sec ±3.76% (184 runs sampled)
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nativeurl - legacy x 507,180 ops/sec ±0.82% (191 runs sampled)
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nativeurl - whatwg x 290,044 ops/sec ±1.96% (189 runs sampled)
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parseurl x 488,907 ops/sec ±2.13% (192 runs sampled)
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> node benchmark/pathquery.js
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Parsing URL "/foo/bar?user=tj&pet=fluffy"
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4 tests completed.
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fasturl x 3,812,564 ops/sec ±3.15% (188 runs sampled)
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nativeurl - legacy x 2,651,631 ops/sec ±1.68% (189 runs sampled)
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nativeurl - whatwg x 161,837 ops/sec ±2.26% (189 runs sampled)
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parseurl x 4,166,338 ops/sec ±2.23% (184 runs sampled)
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> node benchmark/samerequest.js
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Parsing URL "/foo/bar?user=tj&pet=fluffy" on same request object
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4 tests completed.
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fasturl x 3,821,651 ops/sec ±2.42% (185 runs sampled)
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nativeurl - legacy x 2,651,162 ops/sec ±1.90% (187 runs sampled)
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nativeurl - whatwg x 175,166 ops/sec ±1.44% (188 runs sampled)
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parseurl x 14,912,606 ops/sec ±3.59% (183 runs sampled)
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> node benchmark/simplepath.js
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Parsing URL "/foo/bar"
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4 tests completed.
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fasturl x 12,421,765 ops/sec ±2.04% (191 runs sampled)
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nativeurl - legacy x 7,546,036 ops/sec ±1.41% (188 runs sampled)
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nativeurl - whatwg x 198,843 ops/sec ±1.83% (189 runs sampled)
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parseurl x 24,244,006 ops/sec ±0.51% (194 runs sampled)
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> node benchmark/slash.js
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Parsing URL "/"
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4 tests completed.
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fasturl x 17,159,456 ops/sec ±3.25% (188 runs sampled)
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nativeurl - legacy x 11,635,097 ops/sec ±3.79% (184 runs sampled)
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nativeurl - whatwg x 240,693 ops/sec ±0.83% (189 runs sampled)
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parseurl x 42,279,067 ops/sec ±0.55% (190 runs sampled)
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```
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## License
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[MIT](LICENSE)
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[coveralls-image]: https://badgen.net/coveralls/c/github/pillarjs/parseurl/master
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[coveralls-url]: https://coveralls.io/r/pillarjs/parseurl?branch=master
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[node-image]: https://badgen.net/npm/node/parseurl
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[node-url]: https://nodejs.org/en/download
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[npm-downloads-image]: https://badgen.net/npm/dm/parseurl
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[npm-url]: https://npmjs.org/package/parseurl
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[npm-version-image]: https://badgen.net/npm/v/parseurl
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[travis-image]: https://badgen.net/travis/pillarjs/parseurl/master
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[travis-url]: https://travis-ci.org/pillarjs/parseurl
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