playwright/browser_patches/firefox/juggler/TargetRegistry.js

723 lines
26 KiB
JavaScript

/* This Source Code Form is subject to the terms of the Mozilla Public
* License, v. 2.0. If a copy of the MPL was not distributed with this
* file, You can obtain one at http://mozilla.org/MPL/2.0/. */
const {EventEmitter} = ChromeUtils.import('resource://gre/modules/EventEmitter.jsm');
const {Helper} = ChromeUtils.import('chrome://juggler/content/Helper.js');
const {SimpleChannel} = ChromeUtils.import('chrome://juggler/content/SimpleChannel.js');
const {Services} = ChromeUtils.import("resource://gre/modules/Services.jsm");
const {Preferences} = ChromeUtils.import("resource://gre/modules/Preferences.jsm");
const {ContextualIdentityService} = ChromeUtils.import("resource://gre/modules/ContextualIdentityService.jsm");
const {NetUtil} = ChromeUtils.import('resource://gre/modules/NetUtil.jsm');
const {PageHandler} = ChromeUtils.import("chrome://juggler/content/protocol/PageHandler.js");
const {NetworkHandler} = ChromeUtils.import("chrome://juggler/content/protocol/NetworkHandler.js");
const {RuntimeHandler} = ChromeUtils.import("chrome://juggler/content/protocol/RuntimeHandler.js");
const {AccessibilityHandler} = ChromeUtils.import("chrome://juggler/content/protocol/AccessibilityHandler.js");
const {AppConstants} = ChromeUtils.import("resource://gre/modules/AppConstants.jsm");
const helper = new Helper();
const IDENTITY_NAME = 'JUGGLER ';
const HUNDRED_YEARS = 60 * 60 * 24 * 365 * 100;
const ALL_PERMISSIONS = [
'geo',
'desktop-notification',
];
class DownloadInterceptor {
constructor(registry) {
this._registry = registry
this._handlerToUuid = new Map();
helper.addObserver(this._onRequest.bind(this), 'http-on-modify-request');
}
_onRequest(httpChannel, topic) {
let loadContext = helper.getLoadContext(httpChannel);
if (!loadContext)
return;
if (!loadContext.topFrameElement)
return;
const target = this._registry.targetForBrowser(loadContext.topFrameElement);
if (!target)
return;
target._channelIds.add(httpChannel.channelId);
}
//
// nsIDownloadInterceptor implementation.
//
interceptDownloadRequest(externalAppHandler, request, browsingContext, outFile) {
let pageTarget = this._registry._browserBrowsingContextToTarget.get(browsingContext);
// New page downloads won't have browsing contex.
if (!pageTarget)
pageTarget = this._registry._targetForChannel(request);
if (!pageTarget)
return false;
const browserContext = pageTarget.browserContext();
const options = browserContext.downloadOptions;
if (!options)
return false;
const uuid = helper.generateId();
let file = null;
if (options.behavior === 'saveToDisk') {
file = Cc["@mozilla.org/file/local;1"].createInstance(Ci.nsIFile);
file.initWithPath(options.downloadsDir);
file.append(uuid);
try {
file.create(Ci.nsIFile.NORMAL_FILE_TYPE, 0o600);
} catch (e) {
dump(`interceptDownloadRequest failed to create file: ${e}\n`);
return false;
}
}
outFile.value = file;
this._handlerToUuid.set(externalAppHandler, uuid);
const downloadInfo = {
uuid,
browserContextId: browserContext.browserContextId,
pageTargetId: pageTarget.id(),
url: request.name,
suggestedFileName: externalAppHandler.suggestedFileName,
};
this._registry.emit(TargetRegistry.Events.DownloadCreated, downloadInfo);
return true;
}
onDownloadComplete(externalAppHandler, canceled, errorName) {
const uuid = this._handlerToUuid.get(externalAppHandler);
if (!uuid)
return;
this._handlerToUuid.delete(externalAppHandler);
const downloadInfo = {
uuid,
};
if (errorName === 'NS_BINDING_ABORTED') {
downloadInfo.canceled = true;
} else {
downloadInfo.error = errorName;
}
this._registry.emit(TargetRegistry.Events.DownloadFinished, downloadInfo);
}
}
class TargetRegistry {
constructor() {
EventEmitter.decorate(this);
this._browserContextIdToBrowserContext = new Map();
this._userContextIdToBrowserContext = new Map();
this._browserToTarget = new Map();
this._browserBrowsingContextToTarget = new Map();
// Cleanup containers from previous runs (if any)
for (const identity of ContextualIdentityService.getPublicIdentities()) {
if (identity.name && identity.name.startsWith(IDENTITY_NAME)) {
ContextualIdentityService.remove(identity.userContextId);
ContextualIdentityService.closeContainerTabs(identity.userContextId);
}
}
this._defaultContext = new BrowserContext(this, undefined, undefined);
Services.obs.addObserver({
observe: (subject, topic, data) => {
const browser = subject.ownerElement;
if (!browser)
return;
const target = this._browserToTarget.get(browser);
if (!target)
return;
target.emit('crashed');
target.dispose();
this.emit(TargetRegistry.Events.TargetDestroyed, target);
}
}, 'oop-frameloader-crashed');
Services.mm.addMessageListener('juggler:content-ready', {
receiveMessage: message => {
const linkedBrowser = message.target;
if (this._browserToTarget.has(linkedBrowser))
throw new Error(`Internal error: two targets per linkedBrowser`);
let tab;
let gBrowser;
const windowsIt = Services.wm.getEnumerator('navigator:browser');
let window;
while (windowsIt.hasMoreElements()) {
window = windowsIt.getNext();
// gBrowser is always created before tabs. If gBrowser is not
// initialized yet the browser belongs to another window.
if (!window.gBrowser)
continue;
tab = window.gBrowser.getTabForBrowser(linkedBrowser);
if (tab) {
gBrowser = window.gBrowser;
break;
}
}
if (!tab)
return;
const { userContextId } = message.data;
const openerContext = linkedBrowser.browsingContext.opener;
let openerTarget;
if (openerContext) {
// Popups usually have opener context.
openerTarget = this._browserBrowsingContextToTarget.get(openerContext);
} else if (tab.openerTab) {
// Noopener popups from the same window have opener tab instead.
openerTarget = this._browserToTarget.get(tab.openerTab.linkedBrowser);
}
const browserContext = this._userContextIdToBrowserContext.get(userContextId);
const target = new PageTarget(this, window, gBrowser, tab, linkedBrowser, browserContext, openerTarget);
const sessions = [];
const readyData = { sessions, target };
this.emit(TargetRegistry.Events.TargetCreated, readyData);
sessions.forEach(session => target._initSession(session));
return {
scriptsToEvaluateOnNewDocument: browserContext ? browserContext.scriptsToEvaluateOnNewDocument : [],
bindings: browserContext ? browserContext.bindings : [],
settings: browserContext ? browserContext.settings : {},
sessionIds: sessions.map(session => session.sessionId()),
};
},
});
const onTabOpenListener = (window, event) => {
const tab = event.target;
const userContextId = tab.userContextId;
const browserContext = this._userContextIdToBrowserContext.get(userContextId);
if (browserContext && browserContext.defaultViewportSize)
setViewportSizeForBrowser(browserContext.defaultViewportSize, tab.linkedBrowser, window);
};
const onTabCloseListener = event => {
const tab = event.target;
const linkedBrowser = tab.linkedBrowser;
const target = this._browserToTarget.get(linkedBrowser);
if (target) {
target.dispose();
this.emit(TargetRegistry.Events.TargetDestroyed, target);
}
};
Services.wm.addListener({
onOpenWindow: async window => {
const domWindow = window.QueryInterface(Ci.nsIInterfaceRequestor).getInterface(Ci.nsIDOMWindowInternal || Ci.nsIDOMWindow);
if (!(domWindow instanceof Ci.nsIDOMChromeWindow))
return;
if (domWindow.document.readyState !== 'uninitialized')
throw new Error('DOMWindow should not be loaded yet');
await new Promise(fulfill => {
domWindow.addEventListener('DOMContentLoaded', function listener() {
domWindow.removeEventListener('DOMContentLoaded', listener);
fulfill();
});
});
if (!domWindow.gBrowser)
return;
domWindow.gBrowser.tabContainer.addEventListener('TabOpen', event => onTabOpenListener(domWindow, event));
domWindow.gBrowser.tabContainer.addEventListener('TabClose', onTabCloseListener);
},
onCloseWindow: window => {
const domWindow = window.QueryInterface(Ci.nsIInterfaceRequestor).getInterface(Ci.nsIDOMWindowInternal || Ci.nsIDOMWindow);
if (!(domWindow instanceof Ci.nsIDOMChromeWindow))
return;
if (!domWindow.gBrowser)
return;
domWindow.gBrowser.tabContainer.removeEventListener('TabOpen', onTabOpenListener);
domWindow.gBrowser.tabContainer.removeEventListener('TabClose', onTabCloseListener);
for (const tab of domWindow.gBrowser.tabs)
onTabCloseListener({ target: tab });
},
});
const extHelperAppSvc = Cc["@mozilla.org/uriloader/external-helper-app-service;1"].getService(Ci.nsIExternalHelperAppService);
extHelperAppSvc.setDownloadInterceptor(new DownloadInterceptor(this));
}
defaultContext() {
return this._defaultContext;
}
createBrowserContext(removeOnDetach) {
return new BrowserContext(this, helper.generateId(), removeOnDetach);
}
browserContextForId(browserContextId) {
return this._browserContextIdToBrowserContext.get(browserContextId);
}
browserContextForUserContextId(userContextId) {
return this._userContextIdToBrowserContext.get(userContextId);
}
async newPage({browserContextId}) {
const browserContext = this.browserContextForId(browserContextId);
const features = "chrome,dialog=no,all";
// See _callWithURIToLoad in browser.js for the structure of window.arguments
// window.arguments[1]: unused (bug 871161)
// [2]: referrerInfo (nsIReferrerInfo)
// [3]: postData (nsIInputStream)
// [4]: allowThirdPartyFixup (bool)
// [5]: userContextId (int)
// [6]: originPrincipal (nsIPrincipal)
// [7]: originStoragePrincipal (nsIPrincipal)
// [8]: triggeringPrincipal (nsIPrincipal)
// [9]: allowInheritPrincipal (bool)
// [10]: csp (nsIContentSecurityPolicy)
// [11]: nsOpenWindowInfo
const args = Cc["@mozilla.org/array;1"].createInstance(Ci.nsIMutableArray);
const urlSupports = Cc["@mozilla.org/supports-string;1"].createInstance(
Ci.nsISupportsString
);
urlSupports.data = 'about:blank';
args.appendElement(urlSupports); // 0
args.appendElement(undefined); // 1
args.appendElement(undefined); // 2
args.appendElement(undefined); // 3
args.appendElement(undefined); // 4
const userContextIdSupports = Cc[
"@mozilla.org/supports-PRUint32;1"
].createInstance(Ci.nsISupportsPRUint32);
userContextIdSupports.data = browserContext.userContextId;
args.appendElement(userContextIdSupports); // 5
args.appendElement(undefined); // 6
args.appendElement(undefined); // 7
args.appendElement(Services.scriptSecurityManager.getSystemPrincipal()); // 8
const window = Services.ww.openWindow(null, AppConstants.BROWSER_CHROME_URL, '_blank', features, args);
await waitForWindowReady(window);
if (window.gBrowser.browsers.length !== 1)
throw new Error(`Unexpcted number of tabs in the new window: ${window.gBrowser.browsers.length}`);
const browser = window.gBrowser.browsers[0];
const target = this._browserToTarget.get(browser) || await new Promise(fulfill => {
const listener = helper.on(this, TargetRegistry.Events.TargetCreated, ({target}) => {
if (target._linkedBrowser === browser) {
helper.removeListeners([listener]);
fulfill(target);
}
});
});
if (browserContext && browserContext.defaultViewportSize)
setViewportSizeForBrowser(browserContext.defaultViewportSize, browser, window);
browser.focus();
if (browserContext.settings.timezoneId) {
if (await target.hasFailedToOverrideTimezone())
throw new Error('Failed to override timezone');
}
return target.id();
}
targets() {
return Array.from(this._browserToTarget.values());
}
targetForBrowser(browser) {
return this._browserToTarget.get(browser);
}
_targetForChannel(channel) {
const channelId = channel.channelId;
for (const target of this._browserToTarget.values()) {
if (target._channelIds.has(channelId))
return target;
}
return null;
}
}
class PageTarget {
constructor(registry, win, gBrowser, tab, linkedBrowser, browserContext, opener) {
EventEmitter.decorate(this);
this._targetId = helper.generateId();
this._registry = registry;
this._window = win;
this._gBrowser = gBrowser;
this._tab = tab;
this._linkedBrowser = linkedBrowser;
this._browserContext = browserContext;
this._viewportSize = undefined;
this._url = 'about:blank';
this._openerId = opener ? opener.id() : undefined;
this._channel = SimpleChannel.createForMessageManager(`browser::page[${this._targetId}]`, this._linkedBrowser.messageManager);
this._channelIds = new Set();
const navigationListener = {
QueryInterface: ChromeUtils.generateQI([ Ci.nsIWebProgressListener]),
onLocationChange: (aWebProgress, aRequest, aLocation) => this._onNavigated(aLocation),
};
this._eventListeners = [
helper.addProgressListener(tab.linkedBrowser, navigationListener, Ci.nsIWebProgress.NOTIFY_LOCATION),
];
this._disposed = false;
if (browserContext) {
browserContext.pages.add(this);
browserContext._firstPageCallback();
}
this._registry._browserToTarget.set(this._linkedBrowser, this);
this._registry._browserBrowsingContextToTarget.set(this._linkedBrowser.browsingContext, this);
}
linkedBrowser() {
return this._linkedBrowser;
}
browserContext() {
return this._browserContext;
}
async setViewportSize(viewportSize) {
this._viewportSize = viewportSize;
const actualSize = setViewportSizeForBrowser(viewportSize, this._linkedBrowser, this._window);
await this._channel.connect('').send('awaitViewportDimensions', {
width: actualSize.width,
height: actualSize.height
});
}
connectSession(session) {
this._initSession(session);
this._channel.connect('').send('attach', { sessionId: session.sessionId() });
}
disconnectSession(session) {
if (!this._disposed)
this._channel.connect('').emit('detach', { sessionId: session.sessionId() });
}
async close(runBeforeUnload = false) {
await this._gBrowser.removeTab(this._tab, {
skipPermitUnload: !runBeforeUnload,
});
}
_initSession(session) {
const pageHandler = new PageHandler(this, session, this._channel);
const networkHandler = new NetworkHandler(this, session, this._channel);
session.registerHandler('Page', pageHandler);
session.registerHandler('Network', networkHandler);
session.registerHandler('Runtime', new RuntimeHandler(session, this._channel));
session.registerHandler('Accessibility', new AccessibilityHandler(session, this._channel));
pageHandler.enable();
networkHandler.enable();
}
id() {
return this._targetId;
}
info() {
return {
targetId: this.id(),
type: 'page',
browserContextId: this._browserContext ? this._browserContext.browserContextId : undefined,
openerId: this._openerId,
};
}
_onNavigated(aLocation) {
this._url = aLocation.spec;
this._browserContext.grantPermissionsToOrigin(this._url);
}
async ensurePermissions() {
await this._channel.connect('').send('ensurePermissions', {}).catch(e => void e);
}
async addScriptToEvaluateOnNewDocument(script) {
await this._channel.connect('').send('addScriptToEvaluateOnNewDocument', script).catch(e => void e);
}
async addBinding(name, script) {
await this._channel.connect('').send('addBinding', { name, script }).catch(e => void e);
}
async applyContextSetting(name, value) {
await this._channel.connect('').send('applyContextSetting', { name, value }).catch(e => void e);
}
async hasFailedToOverrideTimezone() {
return await this._channel.connect('').send('hasFailedToOverrideTimezone').catch(e => true);
}
dispose() {
this._disposed = true;
if (this._browserContext)
this._browserContext.pages.delete(this);
this._registry._browserToTarget.delete(this._linkedBrowser);
this._registry._browserBrowsingContextToTarget.delete(this._linkedBrowser.browsingContext);
helper.removeListeners(this._eventListeners);
}
}
class BrowserContext {
constructor(registry, browserContextId, removeOnDetach) {
this._registry = registry;
this.browserContextId = browserContextId;
// Default context has userContextId === 0, but we pass undefined to many APIs just in case.
this.userContextId = 0;
if (browserContextId !== undefined) {
const identity = ContextualIdentityService.create(IDENTITY_NAME + browserContextId);
this.userContextId = identity.userContextId;
}
this._principals = [];
// Maps origins to the permission lists.
this._permissions = new Map();
this._registry._browserContextIdToBrowserContext.set(this.browserContextId, this);
this._registry._userContextIdToBrowserContext.set(this.userContextId, this);
this.removeOnDetach = removeOnDetach;
this.proxy = undefined;
this.extraHTTPHeaders = undefined;
this.httpCredentials = undefined;
this.requestInterceptionEnabled = undefined;
this.ignoreHTTPSErrors = undefined;
this.downloadOptions = undefined;
this.defaultViewportSize = undefined;
this.scriptsToEvaluateOnNewDocument = [];
this.bindings = [];
this.settings = {};
this.pages = new Set();
this._firstPagePromise = new Promise(f => this._firstPageCallback = f);
}
async destroy() {
if (this.userContextId !== 0) {
ContextualIdentityService.remove(this.userContextId);
ContextualIdentityService.closeContainerTabs(this.userContextId);
if (this.pages.size) {
await new Promise(f => {
const listener = helper.on(this._registry, TargetRegistry.Events.TargetDestroyed, () => {
if (!this.pages.size) {
helper.removeListeners([listener]);
f();
}
});
});
}
}
this._registry._browserContextIdToBrowserContext.delete(this.browserContextId);
this._registry._userContextIdToBrowserContext.delete(this.userContextId);
}
setIgnoreHTTPSErrors(ignoreHTTPSErrors) {
if (this.ignoreHTTPSErrors === ignoreHTTPSErrors)
return;
this.ignoreHTTPSErrors = ignoreHTTPSErrors;
const certOverrideService = Cc[
"@mozilla.org/security/certoverride;1"
].getService(Ci.nsICertOverrideService);
if (ignoreHTTPSErrors) {
Preferences.set("network.stricttransportsecurity.preloadlist", false);
Preferences.set("security.cert_pinning.enforcement_level", 0);
certOverrideService.setDisableAllSecurityChecksAndLetAttackersInterceptMyData(true, this.userContextId);
} else {
certOverrideService.setDisableAllSecurityChecksAndLetAttackersInterceptMyData(false, this.userContextId);
}
}
async setDefaultViewport(viewport) {
this.defaultViewportSize = viewport ? viewport.viewportSize : undefined;
if (!this.userContextId) {
// First page in the default context comes before onTabOpenListener
// so we don't set default viewport. Wait for it here and ensure the viewport.
await this._firstPagePromise;
}
const promises = Array.from(this.pages).map(async page => {
// Resize to new default, unless the page has a custom viewport.
if (!page._viewportSize)
await page.setViewportSize(this.defaultViewportSize);
});
await Promise.all([
this.applySetting('deviceScaleFactor', viewport ? viewport.deviceScaleFactor : undefined),
...promises,
]);
}
async addScriptToEvaluateOnNewDocument(script) {
this.scriptsToEvaluateOnNewDocument.push(script);
await Promise.all(Array.from(this.pages).map(page => page.addScriptToEvaluateOnNewDocument(script)));
}
async addBinding(name, script) {
this.bindings.push({ name, script });
await Promise.all(Array.from(this.pages).map(page => page.addBinding(name, script)));
}
async applySetting(name, value) {
this.settings[name] = value;
await Promise.all(Array.from(this.pages).map(page => page.applyContextSetting(name, value)));
}
async grantPermissions(origin, permissions) {
this._permissions.set(origin, permissions);
const promises = [];
for (const page of this.pages) {
if (origin === '*' || page._url.startsWith(origin)) {
this.grantPermissionsToOrigin(page._url);
promises.push(page.ensurePermissions());
}
}
await Promise.all(promises);
}
resetPermissions() {
for (const principal of this._principals) {
for (const permission of ALL_PERMISSIONS)
Services.perms.removeFromPrincipal(principal, permission);
}
this._principals = [];
this._permissions.clear();
}
grantPermissionsToOrigin(url) {
let origin = Array.from(this._permissions.keys()).find(key => url.startsWith(key));
if (!origin)
origin = '*';
const permissions = this._permissions.get(origin);
if (!permissions)
return;
const attrs = { userContextId: this.userContextId || undefined };
const principal = Services.scriptSecurityManager.createContentPrincipal(NetUtil.newURI(url), attrs);
this._principals.push(principal);
for (const permission of ALL_PERMISSIONS) {
const action = permissions.includes(permission) ? Ci.nsIPermissionManager.ALLOW_ACTION : Ci.nsIPermissionManager.DENY_ACTION;
Services.perms.addFromPrincipal(principal, permission, action, Ci.nsIPermissionManager.EXPIRE_NEVER, 0 /* expireTime */);
}
}
setCookies(cookies) {
const protocolToSameSite = {
[undefined]: Ci.nsICookie.SAMESITE_NONE,
'Lax': Ci.nsICookie.SAMESITE_LAX,
'Strict': Ci.nsICookie.SAMESITE_STRICT,
};
for (const cookie of cookies) {
const uri = cookie.url ? NetUtil.newURI(cookie.url) : null;
let domain = cookie.domain;
if (!domain) {
if (!uri)
throw new Error('At least one of the url and domain needs to be specified');
domain = uri.host;
}
let path = cookie.path;
if (!path)
path = uri ? dirPath(uri.filePath) : '/';
let secure = false;
if (cookie.secure !== undefined)
secure = cookie.secure;
else if (uri && uri.scheme === 'https')
secure = true;
Services.cookies.add(
domain,
path,
cookie.name,
cookie.value,
secure,
cookie.httpOnly || false,
cookie.expires === undefined || cookie.expires === -1 /* isSession */,
cookie.expires === undefined ? Date.now() + HUNDRED_YEARS : cookie.expires,
{ userContextId: this.userContextId || undefined } /* originAttributes */,
protocolToSameSite[cookie.sameSite],
);
}
}
clearCookies() {
Services.cookies.removeCookiesWithOriginAttributes(JSON.stringify({ userContextId: this.userContextId || undefined }));
}
getCookies() {
const result = [];
const sameSiteToProtocol = {
[Ci.nsICookie.SAMESITE_NONE]: 'None',
[Ci.nsICookie.SAMESITE_LAX]: 'Lax',
[Ci.nsICookie.SAMESITE_STRICT]: 'Strict',
};
for (let cookie of Services.cookies.cookies) {
if (cookie.originAttributes.userContextId !== this.userContextId)
continue;
if (cookie.host === 'addons.mozilla.org')
continue;
result.push({
name: cookie.name,
value: cookie.value,
domain: cookie.host,
path: cookie.path,
expires: cookie.isSession ? -1 : cookie.expiry,
size: cookie.name.length + cookie.value.length,
httpOnly: cookie.isHttpOnly,
secure: cookie.isSecure,
session: cookie.isSession,
sameSite: sameSiteToProtocol[cookie.sameSite],
});
}
return result;
}
}
function dirPath(path) {
return path.substring(0, path.lastIndexOf('/') + 1);
}
async function waitForWindowReady(window) {
if (window.delayedStartupPromise) {
await window.delayedStartupPromise;
} else {
await new Promise((resolve => {
Services.obs.addObserver(function observer(aSubject, aTopic) {
if (window == aSubject) {
Services.obs.removeObserver(observer, aTopic);
resolve();
}
}, "browser-delayed-startup-finished");
}));
}
if (window.document.readyState !== 'complete') {
await new Promise(fulfill => {
window.addEventListener('load', function listener() {
window.removeEventListener('load', listener);
fulfill();
});
});
}
}
function setViewportSizeForBrowser(viewportSize, browser, window) {
if (viewportSize) {
const {width, height} = viewportSize;
const rect = browser.getBoundingClientRect();
window.resizeBy(width - rect.width, height - rect.height);
browser.style.setProperty('min-width', width + 'px');
browser.style.setProperty('min-height', height + 'px');
browser.style.setProperty('max-width', width + 'px');
browser.style.setProperty('max-height', height + 'px');
} else {
browser.style.removeProperty('min-width');
browser.style.removeProperty('min-height');
browser.style.removeProperty('max-width');
browser.style.removeProperty('max-height');
}
const rect = browser.getBoundingClientRect();
return { width: rect.width, height: rect.height };
}
TargetRegistry.Events = {
TargetCreated: Symbol('TargetRegistry.Events.TargetCreated'),
TargetDestroyed: Symbol('TargetRegistry.Events.TargetDestroyed'),
DownloadCreated: Symbol('TargetRegistry.Events.DownloadCreated'),
DownloadFinished: Symbol('TargetRegistry.Events.DownloadFinished'),
};
var EXPORTED_SYMBOLS = ['TargetRegistry'];
this.TargetRegistry = TargetRegistry;