source: trip-planner-front/node_modules/cookie/README.md

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1# cookie
2
3[![NPM Version][npm-version-image]][npm-url]
4[![NPM Downloads][npm-downloads-image]][npm-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
9Basic HTTP cookie parser and serializer for HTTP servers.
10
11## Installation
12
13```sh
14$ npm install cookie
15```
16
17## API
18
19```js
20var cookie = require('cookie');
21```
22
23### cookie.parse(str, options)
24
25Parse an HTTP `Cookie` header string and returning an object of all cookie name-value pairs.
26The `str` argument is the string representing a `Cookie` header value and `options` is an
27optional object containing additional parsing options.
28
29```js
30var cookies = cookie.parse('foo=bar; equation=E%3Dmc%5E2');
31// { foo: 'bar', equation: 'E=mc^2' }
32```
33
34#### Options
35
36`cookie.parse` accepts these properties in the options object.
37
38##### decode
39
40Specifies a function that will be used to decode a cookie's value. Since the value of a cookie
41has a limited character set (and must be a simple string), this function can be used to decode
42a previously-encoded cookie value into a JavaScript string or other object.
43
44The default function is the global `decodeURIComponent`, which will decode any URL-encoded
45sequences into their byte representations.
46
47**note** if an error is thrown from this function, the original, non-decoded cookie value will
48be returned as the cookie's value.
49
50### cookie.serialize(name, value, options)
51
52Serialize a cookie name-value pair into a `Set-Cookie` header string. The `name` argument is the
53name for the cookie, the `value` argument is the value to set the cookie to, and the `options`
54argument is an optional object containing additional serialization options.
55
56```js
57var setCookie = cookie.serialize('foo', 'bar');
58// foo=bar
59```
60
61#### Options
62
63`cookie.serialize` accepts these properties in the options object.
64
65##### domain
66
67Specifies the value for the [`Domain` `Set-Cookie` attribute][rfc-6265-5.2.3]. By default, no
68domain is set, and most clients will consider the cookie to apply to only the current domain.
69
70##### encode
71
72Specifies a function that will be used to encode a cookie's value. Since value of a cookie
73has a limited character set (and must be a simple string), this function can be used to encode
74a value into a string suited for a cookie's value.
75
76The default function is the global `encodeURIComponent`, which will encode a JavaScript string
77into UTF-8 byte sequences and then URL-encode any that fall outside of the cookie range.
78
79##### expires
80
81Specifies the `Date` object to be the value for the [`Expires` `Set-Cookie` attribute][rfc-6265-5.2.1].
82By default, no expiration is set, and most clients will consider this a "non-persistent cookie" and
83will delete it on a condition like exiting a web browser application.
84
85**note** the [cookie storage model specification][rfc-6265-5.3] states that if both `expires` and
86`maxAge` are set, then `maxAge` takes precedence, but it is possible not all clients by obey this,
87so if both are set, they should point to the same date and time.
88
89##### httpOnly
90
91Specifies the `boolean` value for the [`HttpOnly` `Set-Cookie` attribute][rfc-6265-5.2.6]. When truthy,
92the `HttpOnly` attribute is set, otherwise it is not. By default, the `HttpOnly` attribute is not set.
93
94**note** be careful when setting this to `true`, as compliant clients will not allow client-side
95JavaScript to see the cookie in `document.cookie`.
96
97##### maxAge
98
99Specifies the `number` (in seconds) to be the value for the [`Max-Age` `Set-Cookie` attribute][rfc-6265-5.2.2].
100The given number will be converted to an integer by rounding down. By default, no maximum age is set.
101
102**note** the [cookie storage model specification][rfc-6265-5.3] states that if both `expires` and
103`maxAge` are set, then `maxAge` takes precedence, but it is possible not all clients by obey this,
104so if both are set, they should point to the same date and time.
105
106##### path
107
108Specifies the value for the [`Path` `Set-Cookie` attribute][rfc-6265-5.2.4]. By default, the path
109is considered the ["default path"][rfc-6265-5.1.4].
110
111##### sameSite
112
113Specifies the `boolean` or `string` to be the value for the [`SameSite` `Set-Cookie` attribute][rfc-6265bis-03-4.1.2.7].
114
115 - `true` will set the `SameSite` attribute to `Strict` for strict same site enforcement.
116 - `false` will not set the `SameSite` attribute.
117 - `'lax'` will set the `SameSite` attribute to `Lax` for lax same site enforcement.
118 - `'none'` will set the `SameSite` attribute to `None` for an explicit cross-site cookie.
119 - `'strict'` will set the `SameSite` attribute to `Strict` for strict same site enforcement.
120
121More information about the different enforcement levels can be found in
122[the specification][rfc-6265bis-03-4.1.2.7].
123
124**note** This is an attribute that has not yet been fully standardized, and may change in the future.
125This also means many clients may ignore this attribute until they understand it.
126
127##### secure
128
129Specifies the `boolean` value for the [`Secure` `Set-Cookie` attribute][rfc-6265-5.2.5]. When truthy,
130the `Secure` attribute is set, otherwise it is not. By default, the `Secure` attribute is not set.
131
132**note** be careful when setting this to `true`, as compliant clients will not send the cookie back to
133the server in the future if the browser does not have an HTTPS connection.
134
135## Example
136
137The following example uses this module in conjunction with the Node.js core HTTP server
138to prompt a user for their name and display it back on future visits.
139
140```js
141var cookie = require('cookie');
142var escapeHtml = require('escape-html');
143var http = require('http');
144var url = require('url');
145
146function onRequest(req, res) {
147 // Parse the query string
148 var query = url.parse(req.url, true, true).query;
149
150 if (query && query.name) {
151 // Set a new cookie with the name
152 res.setHeader('Set-Cookie', cookie.serialize('name', String(query.name), {
153 httpOnly: true,
154 maxAge: 60 * 60 * 24 * 7 // 1 week
155 }));
156
157 // Redirect back after setting cookie
158 res.statusCode = 302;
159 res.setHeader('Location', req.headers.referer || '/');
160 res.end();
161 return;
162 }
163
164 // Parse the cookies on the request
165 var cookies = cookie.parse(req.headers.cookie || '');
166
167 // Get the visitor name set in the cookie
168 var name = cookies.name;
169
170 res.setHeader('Content-Type', 'text/html; charset=UTF-8');
171
172 if (name) {
173 res.write('<p>Welcome back, <b>' + escapeHtml(name) + '</b>!</p>');
174 } else {
175 res.write('<p>Hello, new visitor!</p>');
176 }
177
178 res.write('<form method="GET">');
179 res.write('<input placeholder="enter your name" name="name"> <input type="submit" value="Set Name">');
180 res.end('</form>');
181}
182
183http.createServer(onRequest).listen(3000);
184```
185
186## Testing
187
188```sh
189$ npm test
190```
191
192## Benchmark
193
194```
195$ npm run bench
196
197> cookie@0.3.1 bench cookie
198> node benchmark/index.js
199
200 http_parser@2.8.0
201 node@6.14.2
202 v8@5.1.281.111
203 uv@1.16.1
204 zlib@1.2.11
205 ares@1.10.1-DEV
206 icu@58.2
207 modules@48
208 napi@3
209 openssl@1.0.2o
210
211> node benchmark/parse.js
212
213 cookie.parse
214
215 6 tests completed.
216
217 simple x 1,200,691 ops/sec ±1.12% (189 runs sampled)
218 decode x 1,012,994 ops/sec ±0.97% (186 runs sampled)
219 unquote x 1,074,174 ops/sec ±2.43% (186 runs sampled)
220 duplicates x 438,424 ops/sec ±2.17% (184 runs sampled)
221 10 cookies x 147,154 ops/sec ±1.01% (186 runs sampled)
222 100 cookies x 14,274 ops/sec ±1.07% (187 runs sampled)
223```
224
225## References
226
227- [RFC 6265: HTTP State Management Mechanism][rfc-6265]
228- [Same-site Cookies][rfc-6265bis-03-4.1.2.7]
229
230[rfc-6265bis-03-4.1.2.7]: https://tools.ietf.org/html/draft-ietf-httpbis-rfc6265bis-03#section-4.1.2.7
231[rfc-6265]: https://tools.ietf.org/html/rfc6265
232[rfc-6265-5.1.4]: https://tools.ietf.org/html/rfc6265#section-5.1.4
233[rfc-6265-5.2.1]: https://tools.ietf.org/html/rfc6265#section-5.2.1
234[rfc-6265-5.2.2]: https://tools.ietf.org/html/rfc6265#section-5.2.2
235[rfc-6265-5.2.3]: https://tools.ietf.org/html/rfc6265#section-5.2.3
236[rfc-6265-5.2.4]: https://tools.ietf.org/html/rfc6265#section-5.2.4
237[rfc-6265-5.2.5]: https://tools.ietf.org/html/rfc6265#section-5.2.5
238[rfc-6265-5.2.6]: https://tools.ietf.org/html/rfc6265#section-5.2.6
239[rfc-6265-5.3]: https://tools.ietf.org/html/rfc6265#section-5.3
240
241## License
242
243[MIT](LICENSE)
244
245[coveralls-image]: https://badgen.net/coveralls/c/github/jshttp/cookie/master
246[coveralls-url]: https://coveralls.io/r/jshttp/cookie?branch=master
247[node-version-image]: https://badgen.net/npm/node/cookie
248[node-version-url]: https://nodejs.org/en/download
249[npm-downloads-image]: https://badgen.net/npm/dm/cookie
250[npm-url]: https://npmjs.org/package/cookie
251[npm-version-image]: https://badgen.net/npm/v/cookie
252[travis-image]: https://badgen.net/travis/jshttp/cookie/master
253[travis-url]: https://travis-ci.org/jshttp/cookie
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