root / HServer / 00.Server / 00.Program / node_modules / cookie-parser / index.js
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| 1 | 39 | HKM | /*!
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| 2 | * cookie-parser
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| 3 | * Copyright(c) 2014 TJ Holowaychuk
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| 4 | * Copyright(c) 2015 Douglas Christopher Wilson
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| 5 | * MIT Licensed
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| 6 | */
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| 7 | |||
| 8 | 'use strict';
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| 9 | |||
| 10 | /**
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| 11 | * Module dependencies.
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| 12 | * @private
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| 13 | */
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| 14 | |||
| 15 | var cookie = require('cookie'); |
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| 16 | var signature = require('cookie-signature'); |
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| 17 | |||
| 18 | /**
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| 19 | * Module exports.
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| 20 | * @public
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| 21 | */
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| 22 | |||
| 23 | module.exports = cookieParser; |
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| 24 | module.exports.JSONCookie = JSONCookie; |
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| 25 | module.exports.JSONCookies = JSONCookies; |
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| 26 | module.exports.signedCookie = signedCookie; |
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| 27 | module.exports.signedCookies = signedCookies; |
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| 28 | |||
| 29 | /**
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| 30 | * Parse Cookie header and populate `req.cookies`
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| 31 | * with an object keyed by the cookie names.
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| 32 | *
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| 33 | * @param {string|array} [secret] A string (or array of strings) representing cookie signing secret(s).
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| 34 | * @param {Object} [options]
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| 35 | * @return {Function}
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| 36 | * @public
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| 37 | */
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| 38 | |||
| 39 | function cookieParser(secret, options) { |
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| 40 | return function cookieParser(req, res, next) { |
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| 41 | if (req.cookies) {
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| 42 | return next();
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| 43 | } |
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| 44 | |||
| 45 | var cookies = req.headers.cookie;
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| 46 | var secrets = !secret || Array.isArray(secret)
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| 47 | ? (secret || []) |
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| 48 | : [secret]; |
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| 49 | |||
| 50 | req.secret = secrets[0];
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| 51 | req.cookies = Object.create(null);
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| 52 | req.signedCookies = Object.create(null);
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| 53 | |||
| 54 | // no cookies
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| 55 | if (!cookies) {
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| 56 | return next();
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| 57 | } |
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| 58 | |||
| 59 | req.cookies = cookie.parse(cookies, options); |
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| 60 | |||
| 61 | // parse signed cookies
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| 62 | if (secrets.length !== 0) { |
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| 63 | req.signedCookies = signedCookies(req.cookies, secrets); |
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| 64 | req.signedCookies = JSONCookies(req.signedCookies); |
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| 65 | } |
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| 66 | |||
| 67 | // parse JSON cookies
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| 68 | req.cookies = JSONCookies(req.cookies); |
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| 69 | |||
| 70 | next(); |
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| 71 | }; |
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| 72 | } |
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| 73 | |||
| 74 | /**
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| 75 | * Parse JSON cookie string.
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| 76 | *
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| 77 | * @param {String} str
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| 78 | * @return {Object} Parsed object or undefined if not json cookie
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| 79 | * @public
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| 80 | */
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| 81 | |||
| 82 | function JSONCookie(str) { |
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| 83 | if (typeof str !== 'string' || str.substr(0, 2) !== 'j:') { |
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| 84 | return undefined; |
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| 85 | } |
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| 86 | |||
| 87 | try {
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| 88 | return JSON.parse(str.slice(2)); |
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| 89 | } catch (err) {
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| 90 | return undefined; |
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| 91 | } |
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| 92 | } |
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| 93 | |||
| 94 | /**
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| 95 | * Parse JSON cookies.
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| 96 | *
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| 97 | * @param {Object} obj
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| 98 | * @return {Object}
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| 99 | * @public
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| 100 | */
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| 101 | |||
| 102 | function JSONCookies(obj) { |
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| 103 | var cookies = Object.keys(obj);
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| 104 | var key;
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| 105 | var val;
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| 106 | |||
| 107 | for (var i = 0; i < cookies.length; i++) { |
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| 108 | key = cookies[i]; |
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| 109 | val = JSONCookie(obj[key]); |
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| 110 | |||
| 111 | if (val) {
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| 112 | obj[key] = val; |
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| 113 | } |
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| 114 | } |
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| 115 | |||
| 116 | return obj;
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| 117 | } |
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| 118 | |||
| 119 | /**
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| 120 | * Parse a signed cookie string, return the decoded value.
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| 121 | *
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| 122 | * @param {String} str signed cookie string
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| 123 | * @param {string|array} secret
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| 124 | * @return {String} decoded value
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| 125 | * @public
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| 126 | */
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| 127 | |||
| 128 | function signedCookie(str, secret) { |
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| 129 | if (typeof str !== 'string') { |
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| 130 | return undefined; |
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| 131 | } |
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| 132 | |||
| 133 | if (str.substr(0, 2) !== 's:') { |
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| 134 | return str;
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| 135 | } |
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| 136 | |||
| 137 | var secrets = !secret || Array.isArray(secret)
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| 138 | ? (secret || []) |
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| 139 | : [secret]; |
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| 140 | |||
| 141 | for (var i = 0; i < secrets.length; i++) { |
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| 142 | var val = signature.unsign(str.slice(2), secrets[i]); |
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| 143 | |||
| 144 | if (val !== false) { |
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| 145 | return val;
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| 146 | } |
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| 147 | } |
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| 148 | |||
| 149 | return false; |
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| 150 | } |
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| 151 | |||
| 152 | /**
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| 153 | * Parse signed cookies, returning an object containing the decoded key/value
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| 154 | * pairs, while removing the signed key from obj.
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| 155 | *
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| 156 | * @param {Object} obj
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| 157 | * @param {string|array} secret
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| 158 | * @return {Object}
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| 159 | * @public
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| 160 | */
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| 161 | |||
| 162 | function signedCookies(obj, secret) { |
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| 163 | var cookies = Object.keys(obj);
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| 164 | var dec;
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| 165 | var key;
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| 166 | var ret = Object.create(null); |
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| 167 | var val;
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| 168 | |||
| 169 | for (var i = 0; i < cookies.length; i++) { |
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| 170 | key = cookies[i]; |
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| 171 | val = obj[key]; |
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| 172 | dec = signedCookie(val, secret); |
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| 173 | |||
| 174 | if (val !== dec) {
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| 175 | ret[key] = dec; |
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| 176 | delete obj[key];
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| 177 | } |
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| 178 | } |
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| 179 | |||
| 180 | return ret;
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| 181 | } |