/usr/share/xul-ext/self-destructing-cookies/lib/domstorage.js is in xul-ext-self-destructing-cookies 0.4.12-1.
This file is owned by root:root, with mode 0o644.
The actual contents of the file can be viewed below.
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This program is free software; you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation; either version 2, or (at your option)
any later version.
This program is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
GNU General Public License for more details.
You should have received a copy of the GNU General Public License
along with this program; if not, write to the Free Software
Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA
02110-1301, USA.
*/
"use strict";
const ERROR = -1;
const IDLE = 0;
const CLEANING = 1;
const CLOSED = 2;
var {Cc, Ci} = require("chrome");
var directoryService = Cc["@mozilla.org/file/directory_service;1"].getService(Ci.nsIProperties);
var storageService = Cc["@mozilla.org/storage/service;1"].getService(Ci.mozIStorageService);
var ioService = Cc["@mozilla.org/network/io-service;1"].getService(Ci.nsIIOService);
var securityManager = Cc["@mozilla.org/scriptsecuritymanager;1"].getService(Ci.nsIScriptSecurityManager);
var eTLDService = Cc["@mozilla.org/network/effective-tld-service;1"].getService(Ci.nsIEffectiveTLDService);
var domStorageManager = null;
// the component was renamed since Firefox 23
try {
domStorageManager = Cc["@mozilla.org/dom/localStorage-manager;1"].getService(Ci.nsIDOMStorageManager);
} catch (e) {
domStorageManager = Cc["@mozilla.org/dom/storagemanager;1"].getService(Ci.nsIDOMStorageManager);
}
// this class is a translation layer between main.js (acts on a domain-level),
// Firefox's DOM services (act on a scope level) and cookietracker.js (acts on a
// a cookie level)
exports.DomStorageHelper = function(options) {
this.filename = options.filename;
this.tracker = options.tracker;
this.isExpired = options.isExpired;
this.onExpired = options.onExpired;
this.gracePeriod = options.gracePeriod;
this.scopeMap = {};
this.stGetScopes = null;
this.stGetDomainScopes = null;
this.state = ERROR;
try {
// try to open the database that persists the localstorage
// we need operate directly on it if we want to get a list of
// all scopes. domStorageManager does not provide this function
this.dbFile = directoryService.get("ProfD", Ci.nsIFile);
this.dbFile.append(this.filename);
if (!this.dbFile) {
console.error("Could not find LocalStorage DB");
return;
}
this.db = storageService.openDatabase(this.dbFile);
if (!this.db) {
console.error("Could not open LocalStorage DB");
return;
}
} catch (e) {
console.error("localstorage: ", e.message);
}
this.createStatements();
this.state = IDLE;
}
// find all domains that have scopes and hand them over to the tracker
exports.DomStorageHelper.prototype.trackAll = function() {
var domain, port, proto;
if (this.state == ERROR) return;
if (!this.createStatements()) return;
try {
while (this.stGetScopes.executeStep()) {
[domain, proto, port] = splitScope(this.stGetScopes.row.scope);
if (getLocalStorage(domain, proto, port)) {
//console.log("ls trackall", domain, proto, port);
this.addScopeMap(domain, proto, port);
var cookie = this.tracker.localStorageCookie(domain);
this.tracker.trackCookie(cookie);
}
}
} catch (e) {
console.exception(e);
}
this.stGetScopes.reset();
}
// track a single new domain that has a scope
exports.DomStorageHelper.prototype.track = function(url) {
if (!url || url == "") return;
if (this.state == ERROR) return;
var uri = ioService.newURI(url, null, null);
//console.log("ls track", uri.host);
this.addScopeMap(uri.host, uri.scheme, uri.port >= 0 ? uri.port : (uri.scheme == "http" ? 80 : 443));
var cookie = this.tracker.localStorageCookie(uri.host);
this.tracker.trackCookie(cookie);
}
// remove all scopes for a domain
exports.DomStorageHelper.prototype.remove = function(domain) {
if (this.state == ERROR) return 0;
//console.log("ls remove", domain, ":");
var removed = 0;
try {
var scopes = this.getScopeMap(domain);
for (var i in scopes) {
var dom, proto, port;
[dom, proto, port] = scopes[i];
//console.log("- ", dom, proto, port);
var storage = getLocalStorage(dom, proto, port);
// only go ahead if the scope also exists in Firefox's cache layer
// otherwise, the scope is probably stale
if (storage) {
storage.clear();
removed += 1;
}
}
// also notify the tracker
var cookie = this.tracker.localStorageCookie(domain);
this.tracker.dropCookie(cookie);
// scopeMap entry can be removed now
this.removeScopeMap(domain);
return removed;
} catch(e) {
console.exception(e);
}
// only reached when there was an exception
return 0;
}
// find and remove all scopes without a reference. runs asynchronously
// in the background
exports.DomStorageHelper.prototype.cleanNow = function(removeSession) {
if (this.state != IDLE) return;
if (!this.createStatements()) return;
this.state = CLEANING;
//console.log("ls clean now");
var _this = this;
this.stGetScopes.executeAsync({
handleResult: function(rs){ _this.handleCleanNowResult(rs, _this, removeSession); },
handleError: function(error){ _this.handleError(error, _this); },
handleCompletion: function(reason){ _this.handleCleanNowCompletion(reason, _this); }
});
}
// are we done cleaning?
exports.DomStorageHelper.prototype.busy = function() {
return this.state == CLEANING;
}
// add an entry to the scope map. the scope map stores all known
// localstorage scopes for a base domain. firefox does not provide
// an api to query this and the db state might be stale due to the caching
// layer. we have to keep track of these via the dom observer ourselves.
exports.DomStorageHelper.prototype.addScopeMap = function(domain, proto, port) {
if (!domain || !proto || !port) return;
// always index by base domain
if (domain.startsWith(".")) domain = domain.substr(1);
var bd = domain;
try {
bd = eTLDService.getBaseDomainFromHost(bd, 0);
} catch (e) {
// fall back to the domain itself
// this space intentionally left blank
}
//console.log("scopemap add", bd, domain, proto, port);
if (!this.scopeMap[bd]) this.scopeMap[bd] = {};
if (!this.scopeMap[bd][domain]) this.scopeMap[bd][domain] = {};
if (!this.scopeMap[bd][domain][proto]) this.scopeMap[bd][domain][proto] = {};
if (!this.scopeMap[bd][domain][proto][port]) this.scopeMap[bd][domain][proto][port] = true;
}
// remove a base domain's entry from the scope map
exports.DomStorageHelper.prototype.removeScopeMap = function(domain) {
if (!domain) return;
// always index by base domain
if (domain.startsWith(".")) domain = domain.substr(1);
var bd = domain;
try {
bd = eTLDService.getBaseDomainFromHost(bd, 0);
} catch (e) {
// fall back to the domain itself
// this space intentionally left blank
}
//console.log("scopemap remove", bd);
delete this.scopeMap[bd];
}
// read a base domain's scopes from the scope map
exports.DomStorageHelper.prototype.getScopeMap = function(domain) {
if (!domain) return [];
var scopes = [];
// always index by base domain
if (domain.startsWith(".")) domain = domain.substr(1);
var bd = domain;
try {
bd = eTLDService.getBaseDomainFromHost(bd, 0);
} catch (e) {
// fall back to the domain itself
// this space intentionally left blank
}
if (!this.scopeMap[bd]) return scopes;
for (var dom in this.scopeMap[bd]) {
for (var proto in this.scopeMap[bd][dom]) {
for (var port in this.scopeMap[bd][dom][proto]) {
scopes.push([dom, proto, port]);
}
}
}
return scopes;
}
// a new chunk of scopes to clean
exports.DomStorageHelper.prototype.handleCleanNowResult = function(resultSet, _this, removeSession) {
for (var row = resultSet.getNextRow(); row; row = resultSet.getNextRow()) {
try {
var domain, proto, port;
[domain, proto, port] = splitScope(row.getResultByName("scope"));
_this.addScopeMap(domain, proto, port);
// expire the domain's pseudo-cookie if the tracker has no references
var cookie = this.tracker.localStorageCookie(domain);
if (_this.isExpired(cookie, _this.tracker.countWorkers(cookie))) {
_this.onExpired(cookie, false, removeSession);
}
} catch (e) {
console.exception(e);
}
}
}
// we are done cleaning.
exports.DomStorageHelper.prototype.handleCleanNowCompletion = function(reason, _this) {
//console.log("ls cleannow complete");
_this.scopeMap = {};
_this.state = IDLE;
}
exports.DomStorageHelper.prototype.handleError = function(error, _this) {
console.error("localstorage: " + error.message);
_this.state = IDLE;
}
// close the database connection when we unload
exports.DomStorageHelper.prototype.shutdown = function() {
if (this.stGetScopes) this.stGetScopes.finalize();
if (this.stGetDomainScopes) this.stGetDomainScopes.finalize();
if (this.db) this.db.asyncClose();
this.state = CLOSED;
}
// try to create database statements. might fail if localstorage has not been used yet.
exports.DomStorageHelper.prototype.createStatements = function() {
if (this.stGetScopes) return true;
try {
this.stGetScopes = this.db.createStatement("SELECT DISTINCT scope FROM webappsstore2;");
this.stGetDomainScopes = this.db.createStatement("SELECT DISTINCT scope FROM webappsstore2 WHERE scope LIKE ? || '%';");
} catch (e) {
console.warn("LocalStorage has not yet been initialized.");
return false;
}
return true;
}
// parse a scope as it appears in the db
function splitScope(scope) {
var port, proto, host;
[host, proto, port] = scope.split(":");
for (var i = host.length - 1, r = ""; i >= 0; r += host[i--]) {}
return [r, proto, port];
}
// try to get a scope's localstorage object through Firefox's cache layer
function getLocalStorage(domain, proto, port) {
var uri, principal, storage;
var s = proto + "://" + (domain.startsWith(".") ? domain.substr(1) : domain) + ":" + port;
try {
uri = ioService.newURI(s, null, null);
principal = securityManager.getNoAppCodebasePrincipal(uri);
storage = domStorageManager.getLocalStorageForPrincipal(principal, null);
} catch (e) {
console.error("localstorage: ", e.message);
return null;
}
if (!storage || storage.length < 1) return null;
return storage;
}
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