source: trip-planner-front/node_modules/encodeurl/README.md@ 571e0df

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1# encodeurl
2
3[![NPM Version][npm-image]][npm-url]
4[![NPM Downloads][downloads-image]][downloads-url]
5[![Node.js Version][node-version-image]][node-version-url]
6[![Build Status][travis-image]][travis-url]
7[![Test Coverage][coveralls-image]][coveralls-url]
8
9Encode a URL to a percent-encoded form, excluding already-encoded sequences
10
11## Installation
12
13This is a [Node.js](https://nodejs.org/en/) module available through the
14[npm registry](https://www.npmjs.com/). Installation is done using the
15[`npm install` command](https://docs.npmjs.com/getting-started/installing-npm-packages-locally):
16
17```sh
18$ npm install encodeurl
19```
20
21## API
22
23```js
24var encodeUrl = require('encodeurl')
25```
26
27### encodeUrl(url)
28
29Encode a URL to a percent-encoded form, excluding already-encoded sequences.
30
31This function will take an already-encoded URL and encode all the non-URL
32code points (as UTF-8 byte sequences). This function will not encode the
33"%" character unless it is not part of a valid sequence (`%20` will be
34left as-is, but `%foo` will be encoded as `%25foo`).
35
36This encode is meant to be "safe" and does not throw errors. It will try as
37hard as it can to properly encode the given URL, including replacing any raw,
38unpaired surrogate pairs with the Unicode replacement character prior to
39encoding.
40
41This function is _similar_ to the intrinsic function `encodeURI`, except it
42will not encode the `%` character if that is part of a valid sequence, will
43not encode `[` and `]` (for IPv6 hostnames) and will replace raw, unpaired
44surrogate pairs with the Unicode replacement character (instead of throwing).
45
46## Examples
47
48### Encode a URL containing user-controled data
49
50```js
51var encodeUrl = require('encodeurl')
52var escapeHtml = require('escape-html')
53
54http.createServer(function onRequest (req, res) {
55 // get encoded form of inbound url
56 var url = encodeUrl(req.url)
57
58 // create html message
59 var body = '<p>Location ' + escapeHtml(url) + ' not found</p>'
60
61 // send a 404
62 res.statusCode = 404
63 res.setHeader('Content-Type', 'text/html; charset=UTF-8')
64 res.setHeader('Content-Length', String(Buffer.byteLength(body, 'utf-8')))
65 res.end(body, 'utf-8')
66})
67```
68
69### Encode a URL for use in a header field
70
71```js
72var encodeUrl = require('encodeurl')
73var escapeHtml = require('escape-html')
74var url = require('url')
75
76http.createServer(function onRequest (req, res) {
77 // parse inbound url
78 var href = url.parse(req)
79
80 // set new host for redirect
81 href.host = 'localhost'
82 href.protocol = 'https:'
83 href.slashes = true
84
85 // create location header
86 var location = encodeUrl(url.format(href))
87
88 // create html message
89 var body = '<p>Redirecting to new site: ' + escapeHtml(location) + '</p>'
90
91 // send a 301
92 res.statusCode = 301
93 res.setHeader('Content-Type', 'text/html; charset=UTF-8')
94 res.setHeader('Content-Length', String(Buffer.byteLength(body, 'utf-8')))
95 res.setHeader('Location', location)
96 res.end(body, 'utf-8')
97})
98```
99
100## Testing
101
102```sh
103$ npm test
104$ npm run lint
105```
106
107## References
108
109- [RFC 3986: Uniform Resource Identifier (URI): Generic Syntax][rfc-3986]
110- [WHATWG URL Living Standard][whatwg-url]
111
112[rfc-3986]: https://tools.ietf.org/html/rfc3986
113[whatwg-url]: https://url.spec.whatwg.org/
114
115## License
116
117[MIT](LICENSE)
118
119[npm-image]: https://img.shields.io/npm/v/encodeurl.svg
120[npm-url]: https://npmjs.org/package/encodeurl
121[node-version-image]: https://img.shields.io/node/v/encodeurl.svg
122[node-version-url]: https://nodejs.org/en/download
123[travis-image]: https://img.shields.io/travis/pillarjs/encodeurl.svg
124[travis-url]: https://travis-ci.org/pillarjs/encodeurl
125[coveralls-image]: https://img.shields.io/coveralls/pillarjs/encodeurl.svg
126[coveralls-url]: https://coveralls.io/r/pillarjs/encodeurl?branch=master
127[downloads-image]: https://img.shields.io/npm/dm/encodeurl.svg
128[downloads-url]: https://npmjs.org/package/encodeurl
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