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code review re. sandbox shutdown

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This commit is contained in:
gorhill 2015-07-03 13:32:00 -04:00
parent 352ef808f1
commit 35ef80f3aa
2 changed files with 49 additions and 37 deletions
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38
platform/firefox/frameModule.js
View file

@ -211,11 +211,12 @@ const contentObserver = {
return this.ACCEPT;
},
initContentScripts: function(win, sandbox) {
initContentScripts: function(win, create) {
let messager = getMessageManager(win);
let sandboxId = hostName + ':sb:' + this.uniqueSandboxId++;
let sandbox;
if ( sandbox ) {
if ( create ) {
let sandboxName = [
win.location.href.slice(0, 100),
win.document.title.slice(0, 100)
@ -236,6 +237,23 @@ const contentObserver = {
// I've seen this happens, need to investigate why.
}
};
// The goal is to have content scripts removed from web pages. This
// helps remove traces of uBlock from memory when disabling/removing
// the addon.
// For example, this takes care of:
// https://github.com/gorhill/uBlock/commit/ea4faff383789053f423498c1f1165c403fde7c7#commitcomment-11964137
// > "gets the whole selected tab flashing"
sandbox.outerShutdown = function() {
sandbox.removeMessageListener();
sandbox.addMessageListener =
sandbox.injectScript =
sandbox.removeMessageListener =
sandbox.sendAsyncMessage =
sandbox.outerShutdown = function(){};
sandbox.vAPI = {};
messager = null;
};
}
else {
sandbox = win;
@ -283,22 +301,6 @@ const contentObserver = {
sandbox._messageListener_ = null;
};
// The goal is to have content scripts removed from web pages. This
// helps remove traces of uBlock from memory when disabling/removing
// the addon.
// For example, this takes care of:
// https://github.com/gorhill/uBlock/commit/ea4faff383789053f423498c1f1165c403fde7c7#commitcomment-11964137
// > "gets the whole selected tab flashing"
sandbox.shutdownSandbox = function() {
sandbox.removeMessageListener();
sandbox.addMessageListener =
sandbox.injectScript =
sandbox.removeMessageListener =
sandbox.sendAsyncMessage =
sandbox.shutdownSandbox = null;
messager = null;
};
return sandbox;
},

48
platform/firefox/vapi-client.js
View file

@ -19,7 +19,7 @@
Home: https://github.com/gorhill/uBlock
*/
/* global addMessageListener, removeMessageListener, sendAsyncMessage, shutdownSandbox */
/* global addMessageListener, removeMessageListener, sendAsyncMessage, outerShutdown */
// For non background pages
@ -78,27 +78,24 @@ vAPI.messaging = {
builtinChannelHandler: function(msg) {
if ( msg.cmd === 'injectScript' ) {
// injectScript is not always present.
// - See contentObserver.initContentScripts in frameModule.js
if ( typeof self.injectScript !== 'function' ) {
return;
}
var details = msg.details;
if ( !details.allFrames && window !== window.top ) {
return;
}
// TODO: investigate why this happens, and if this happens
// legitimately (content scripts not injected I suspect, so
// that would make this legitimate).
// Case: open popup UI from icon in uBlock's logger
if ( typeof self.injectScript === 'function' ) {
self.injectScript(details.file);
}
self.injectScript(details.file);
return;
}
if ( msg.cmd === 'shutdownSandbox' ) {
vAPI.shutdown.exec();
vAPI.messaging.close();
window.removeEventListener('pagehide', vAPI.messaging.toggleListener, true);
window.removeEventListener('pageshow', vAPI.messaging.toggleListener, true);
vAPI.messaging = null;
vAPI = {};
shutdownSandbox();
vAPI.messaging.shutdown();
if ( typeof self.outerShutdown === 'function' ) {
outerShutdown();
}
return;
}
},
@ -109,6 +106,13 @@ vAPI.messaging = {
window.addEventListener('pageshow', this.toggleListener, true);
},
shutdown: function() {
this.close();
window.removeEventListener('pagehide', this.toggleListener, true);
window.removeEventListener('pageshow', this.toggleListener, true);
vAPI.messaging = null;
},
close: function() {
window.removeEventListener('pagehide', this.toggleListener, true);
window.removeEventListener('pageshow', this.toggleListener, true);
@ -146,18 +150,24 @@ vAPI.messaging = {
},
toggleListener: function({type, persisted}) {
if ( !vAPI.messaging ) {
var me = vAPI.messaging;
if ( !me ) {
return;
}
if ( type === 'pagehide' ) {
vAPI.messaging.disconnect();
if ( !persisted ) {
vAPI.shutdown.exec();
vAPI.messaging.shutdown();
if ( typeof self.outerShutdown === 'function' ) {
outerShutdown();
}
}
me.disconnect();
return;
}
if ( persisted ) {
vAPI.messaging.connect();
}
me.connect();
}
};