source: trip-planner-front/node_modules/needle/lib/cookies.js@ fa375fe

Last change on this file since fa375fe was 6a3a178, checked in by Ema <ema_spirova@…>, 3 years ago

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1
2// Simple cookie handling implementation based on the standard RFC 6265.
3//
4// This module just has two functionalities:
5// - Parse a set-cookie-header as a key value object
6// - Write a cookie-string from a key value object
7//
8// All cookie attributes are ignored.
9
10var unescape = require('querystring').unescape;
11
12var COOKIE_PAIR = /^([^=\s]+)\s*=\s*("?)\s*(.*)\s*\2\s*$/;
13var EXCLUDED_CHARS = /[\x00-\x1F\x7F\x3B\x3B\s\"\,\\"%]/g;
14var TRAILING_SEMICOLON = /\x3B+$/;
15var SEP_SEMICOLON = /\s*\x3B\s*/;
16
17// i know these should be 'const', but I'd like to keep
18// supporting earlier node.js versions as long as I can. :)
19
20var KEY_INDEX = 1; // index of key from COOKIE_PAIR match
21var VALUE_INDEX = 3; // index of value from COOKIE_PAIR match
22
23// Returns a copy str trimmed and without trainling semicolon.
24function cleanCookieString(str) {
25 return str.trim().replace(/\x3B+$/, '');
26}
27
28function getFirstPair(str) {
29 var index = str.indexOf('\x3B');
30 return index === -1 ? str : str.substr(0, index);
31}
32
33// Returns a encoded copy of str based on RFC6265 S4.1.1.
34function encodeCookieComponent(str) {
35 return str.toString().replace(EXCLUDED_CHARS, encodeURIComponent);
36}
37
38// Parses a set-cookie-string based on the standard defined in RFC6265 S4.1.1.
39function parseSetCookieString(str) {
40 str = cleanCookieString(str);
41 str = getFirstPair(str);
42
43 var res = COOKIE_PAIR.exec(str);
44 if (!res || !res[VALUE_INDEX]) return null;
45
46 return {
47 name : unescape(res[KEY_INDEX]),
48 value : unescape(res[VALUE_INDEX])
49 };
50}
51
52// Parses a set-cookie-header and returns a key/value object.
53// Each key represents the name of a cookie.
54function parseSetCookieHeader(header) {
55 if (!header) return {};
56 header = Array.isArray(header) ? header : [header];
57
58 return header.reduce(function(res, str) {
59 var cookie = parseSetCookieString(str);
60 if (cookie) res[cookie.name] = cookie.value;
61 return res;
62 }, {});
63}
64
65// Writes a set-cookie-string based on the standard definded in RFC6265 S4.1.1.
66function writeCookieString(obj) {
67 return Object.keys(obj).reduce(function(str, name) {
68 var encodedName = encodeCookieComponent(name);
69 var encodedValue = encodeCookieComponent(obj[name]);
70 str += (str ? '; ' : '') + encodedName + '=' + encodedValue;
71 return str;
72 }, '');
73}
74
75// returns a key/val object from an array of cookie strings
76exports.read = parseSetCookieHeader;
77
78// writes a cookie string header
79exports.write = writeCookieString;
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