Express Server erstellt

express-server/node_modules/cookie-parser/index.js

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+/*!
+ * cookie-parser
+ * Copyright(c) 2014 TJ Holowaychuk
+ * Copyright(c) 2015 Douglas Christopher Wilson
+ * MIT Licensed
+ */
+
+'use strict';
+
+/**
+ * Module dependencies.
+ * @private
+ */
+
+var cookie = require('cookie');
+var signature = require('cookie-signature');
+
+/**
+ * Module exports.
+ * @public
+ */
+
+module.exports = cookieParser;
+module.exports.JSONCookie = JSONCookie;
+module.exports.JSONCookies = JSONCookies;
+module.exports.signedCookie = signedCookie;
+module.exports.signedCookies = signedCookies;
+
+/**
+ * Parse Cookie header and populate `req.cookies`
+ * with an object keyed by the cookie names.
+ *
+ * @param {string|array} [secret] A string (or array of strings) representing cookie signing secret(s).
+ * @param {Object} [options]
+ * @return {Function}
+ * @public
+ */
+
+function cookieParser(secret, options) {
+  return function cookieParser(req, res, next) {
+    if (req.cookies) {
+      return next();
+    }
+
+    var cookies = req.headers.cookie;
+    var secrets = !secret || Array.isArray(secret)
+      ? (secret || [])
+      : [secret];
+
+    req.secret = secrets[0];
+    req.cookies = Object.create(null);
+    req.signedCookies = Object.create(null);
+
+    // no cookies
+    if (!cookies) {
+      return next();
+    }
+
+    req.cookies = cookie.parse(cookies, options);
+
+    // parse signed cookies
+    if (secrets.length !== 0) {
+      req.signedCookies = signedCookies(req.cookies, secrets);
+      req.signedCookies = JSONCookies(req.signedCookies);
+    }
+
+    // parse JSON cookies
+    req.cookies = JSONCookies(req.cookies);
+
+    next();
+  };
+}
+
+/**
+ * Parse JSON cookie string.
+ *
+ * @param {String} str
+ * @return {Object} Parsed object or undefined if not json cookie
+ * @public
+ */
+
+function JSONCookie(str) {
+  if (typeof str !== 'string' || str.substr(0, 2) !== 'j:') {
+    return undefined;
+  }
+
+  try {
+    return JSON.parse(str.slice(2));
+  } catch (err) {
+    return undefined;
+  }
+}
+
+/**
+ * Parse JSON cookies.
+ *
+ * @param {Object} obj
+ * @return {Object}
+ * @public
+ */
+
+function JSONCookies(obj) {
+  var cookies = Object.keys(obj);
+  var key;
+  var val;
+
+  for (var i = 0; i < cookies.length; i++) {
+    key = cookies[i];
+    val = JSONCookie(obj[key]);
+
+    if (val) {
+      obj[key] = val;
+    }
+  }
+
+  return obj;
+}
+
+/**
+ * Parse a signed cookie string, return the decoded value.
+ *
+ * @param {String} str signed cookie string
+ * @param {string|array} secret
+ * @return {String} decoded value
+ * @public
+ */
+
+function signedCookie(str, secret) {
+  if (typeof str !== 'string') {
+    return undefined;
+  }
+
+  if (str.substr(0, 2) !== 's:') {
+    return str;
+  }
+
+  var secrets = !secret || Array.isArray(secret)
+    ? (secret || [])
+    : [secret];
+
+  for (var i = 0; i < secrets.length; i++) {
+    var val = signature.unsign(str.slice(2), secrets[i]);
+
+    if (val !== false) {
+      return val;
+    }
+  }
+
+  return false;
+}
+
+/**
+ * Parse signed cookies, returning an object containing the decoded key/value
+ * pairs, while removing the signed key from obj.
+ *
+ * @param {Object} obj
+ * @param {string|array} secret
+ * @return {Object}
+ * @public
+ */
+
+function signedCookies(obj, secret) {
+  var cookies = Object.keys(obj);
+  var dec;
+  var key;
+  var ret = Object.create(null);
+  var val;
+
+  for (var i = 0; i < cookies.length; i++) {
+    key = cookies[i];
+    val = obj[key];
+    dec = signedCookie(val, secret);
+
+    if (val !== dec) {
+      ret[key] = dec;
+      delete obj[key];
+    }
+  }
+
+  return ret;
+}