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/*
* Copyright (C) 2010 Google Inc. All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions are
* met:
*
* * Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* * Redistributions in binary form must reproduce the above
* copyright notice, this list of conditions and the following disclaimer
* in the documentation and/or other materials provided with the
* distribution.
* * Neither the name of Google Inc. nor the names of its
* contributors may be used to endorse or promote products derived from
* this software without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
* "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
* A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
* OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
* SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
* LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
* OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*/
// Ideally, we would rely on platform support for parsing a cookie, since
// this would save us from any potential inconsistency. However, exposing
// platform cookie parsing logic would require quite a bit of additional
// plumbing, and at least some platforms lack support for parsing Cookie,
// which is in a format slightly different from Set-Cookie and is normally
// only required on the server side.
import {Cookie, Type} from './Cookie.js';
/**
* @unrestricted
*/
export class CookieParser {
/**
* @param {string=} domain
*/
constructor(domain) {
if (domain) {
// Handle domain according to
// https://tools.ietf.org/html/draft-ietf-httpbis-rfc6265bis-03#section-5.3.3
this._domain = domain.toLowerCase().replace(/^\./, '');
}
/** @type {!Array} */
this._cookies = [];
/** @type {string|undefined} */
this._input;
this._originalInputLength = 0;
}
/**
* @param {string|undefined} header
* @return {?Array}
*/
static parseCookie(header) {
return (new CookieParser()).parseCookie(header);
}
/**
* @param {string|undefined} header
* @param {string=} domain
* @return {?Array}
*/
static parseSetCookie(header, domain) {
return (new CookieParser(domain)).parseSetCookie(header);
}
/**
* @return {!Array}
*/
cookies() {
return this._cookies;
}
/**
* @param {string|undefined} cookieHeader
* @return {?Array}
*/
parseCookie(cookieHeader) {
if (!this._initialize(cookieHeader)) {
return null;
}
for (let kv = this._extractKeyValue(); kv; kv = this._extractKeyValue()) {
if (kv.key.charAt(0) === '$' && this._lastCookie) {
this._lastCookie.addAttribute(kv.key.slice(1), kv.value);
} else if (kv.key.toLowerCase() !== '$version' && typeof kv.value === 'string') {
this._addCookie(kv, Type.Request);
}
this._advanceAndCheckCookieDelimiter();
}
this._flushCookie();
return this._cookies;
}
/**
* @param {string|undefined} setCookieHeader
* @return {?Array}
*/
parseSetCookie(setCookieHeader) {
if (!this._initialize(setCookieHeader)) {
return null;
}
for (let kv = this._extractKeyValue(); kv; kv = this._extractKeyValue()) {
if (this._lastCookie) {
this._lastCookie.addAttribute(kv.key, kv.value);
} else {
this._addCookie(kv, Type.Response);
}
if (this._advanceAndCheckCookieDelimiter()) {
this._flushCookie();
}
}
this._flushCookie();
return this._cookies;
}
/**
* @param {string|undefined} headerValue
* @return {boolean}
*/
_initialize(headerValue) {
this._input = headerValue;
if (typeof headerValue !== 'string') {
return false;
}
this._cookies = [];
this._lastCookie = null;
this._lastCookieLine = '';
this._originalInputLength = /** @type {string} */ (this._input).length;
return true;
}
_flushCookie() {
if (this._lastCookie) {
// if we have a last cookie we know that these valeus all exist, hence the typecasts
this._lastCookie.setSize(
this._originalInputLength - /** @type {string} */ (this._input).length -
/** @type {number} */ (this._lastCookiePosition));
this._lastCookie.setCookieLine(/** @type {string} */ (this._lastCookieLine).replace('\n', ''));
}
this._lastCookie = null;
this._lastCookieLine = '';
}
/**
* @return {?KeyValue}
*/
_extractKeyValue() {
if (!this._input || !this._input.length) {
return null;
}
// Note: RFCs offer an option for quoted values that may contain commas and semicolons.
// Many browsers/platforms do not support this, however (see http://webkit.org/b/16699
// and http://crbug.com/12361). The logic below matches latest versions of IE, Firefox,
// Chrome and Safari on some old platforms. The latest version of Safari supports quoted
// cookie values, though.
const keyValueMatch = /^[ \t]*([^\s=;]+)[ \t]*(?:=[ \t]*([^;\n]*))?/.exec(this._input);
if (!keyValueMatch) {
console.error('Failed parsing cookie header before: ' + this._input);
return null;
}
const result = new KeyValue(
keyValueMatch[1], keyValueMatch[2] && keyValueMatch[2].trim(),
/** @type {number} */ (this._originalInputLength) - this._input.length);
this._lastCookieLine += keyValueMatch[0];
this._input = this._input.slice(keyValueMatch[0].length);
return result;
}
/**
* @return {boolean}
*/
_advanceAndCheckCookieDelimiter() {
if (!this._input) {
return false;
}
const match = /^\s*[\n;]\s*/.exec(this._input);
if (!match) {
return false;
}
this._lastCookieLine += match[0];
this._input = this._input.slice(match[0].length);
return match[0].match('\n') !== null;
}
/**
* @param {!KeyValue} keyValue
* @param {!Type} type
*/
_addCookie(keyValue, type) {
if (this._lastCookie) {
this._lastCookie.setSize(keyValue.position - /** @type {number} */ (this._lastCookiePosition));
}
// Mozilla bug 169091: Mozilla, IE and Chrome treat single token (w/o "=") as
// specifying a value for a cookie with empty name.
this._lastCookie = typeof keyValue.value === 'string' ? new Cookie(keyValue.key, keyValue.value, type) :
new Cookie('', keyValue.key, type);
if (this._domain) {
this._lastCookie.addAttribute('domain', this._domain);
}
this._lastCookiePosition = keyValue.position;
this._cookies.push(this._lastCookie);
}
}
/**
* @unrestricted
*/
class KeyValue {
/**
* @param {string} key
* @param {string|undefined} value
* @param {number} position
*/
constructor(key, value, position) {
this.key = key;
this.value = value;
this.position = position;
}
}
