gnome-shell/js/ui/extensionDownloader.js

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// -*- mode: js; js-indent-level: 4; indent-tabs-mode: nil -*-
/* exported init, installExtension, uninstallExtension,
checkForUpdates, updateExtension */
const { Clutter, Gio, GLib, GObject, Soup } = imports.gi;
const Config = imports.misc.config;
const Dialog = imports.ui.dialog;
const ExtensionUtils = imports.misc.extensionUtils;
const FileUtils = imports.misc.fileUtils;
const Main = imports.ui.main;
const ModalDialog = imports.ui.modalDialog;
var REPOSITORY_URL_BASE = 'https://extensions.gnome.org';
var REPOSITORY_URL_DOWNLOAD = `${REPOSITORY_URL_BASE}/download-extension/%s.shell-extension.zip`;
var REPOSITORY_URL_INFO = `${REPOSITORY_URL_BASE}/extension-info/`;
var REPOSITORY_URL_UPDATE = `${REPOSITORY_URL_BASE}/update-info/`;
let _httpSession;
function installExtension(uuid, invocation) {
let params = { uuid,
shell_version: Config.PACKAGE_VERSION };
let message = Soup.form_request_new_from_hash('GET', REPOSITORY_URL_INFO, params);
_httpSession.queue_message(message, () => {
if (message.status_code != Soup.KnownStatusCode.OK) {
Main.extensionManager.logExtensionError(uuid, `downloading info: ${message.status_code}`);
invocation.return_dbus_error('org.gnome.Shell.DownloadInfoError', message.status_code.toString());
return;
}
let info;
try {
info = JSON.parse(message.response_body.data);
} catch (e) {
Main.extensionManager.logExtensionError(uuid, `parsing info: ${e}`);
invocation.return_dbus_error('org.gnome.Shell.ParseInfoError', e.toString());
return;
}
let dialog = new InstallExtensionDialog(uuid, info, invocation);
dialog.open(global.get_current_time());
});
}
function uninstallExtension(uuid) {
let extension = Main.extensionManager.lookup(uuid);
if (!extension)
return false;
// Don't try to uninstall system extensions
if (extension.type != ExtensionUtils.ExtensionType.PER_USER)
return false;
if (!Main.extensionManager.unloadExtension(extension))
return false;
FileUtils.recursivelyDeleteDir(extension.dir, true);
return true;
}
function gotExtensionZipFile(session, message, uuid, dir, callback, errback) {
if (message.status_code != Soup.KnownStatusCode.OK) {
errback('DownloadExtensionError', message.status_code);
return;
}
try {
if (!dir.query_exists(null))
dir.make_directory_with_parents(null);
} catch (e) {
errback('CreateExtensionDirectoryError', e);
return;
}
let [file, stream] = Gio.File.new_tmp('XXXXXX.shell-extension.zip');
let contents = message.response_body.flatten().get_as_bytes();
stream.output_stream.write_bytes(contents, null);
stream.close(null);
let [success, pid] = GLib.spawn_async(null,
['unzip', '-uod', dir.get_path(), '--', file.get_path()],
null,
GLib.SpawnFlags.SEARCH_PATH | GLib.SpawnFlags.DO_NOT_REAP_CHILD,
null);
if (!success) {
errback('ExtractExtensionError');
return;
}
GLib.child_watch_add(GLib.PRIORITY_DEFAULT, pid, (o, status) => {
GLib.spawn_close_pid(pid);
if (status != 0)
errback('ExtractExtensionError');
else
callback();
});
}
function updateExtension(uuid) {
// This gets a bit tricky. We want the update to be seamless -
// if we have any error during downloading or extracting, we
// want to not unload the current version.
let oldExtensionTmpDir = GLib.Dir.make_tmp('XXXXXX-shell-extension');
let newExtensionTmpDir = GLib.Dir.make_tmp('XXXXXX-shell-extension');
let params = { shell_version: Config.PACKAGE_VERSION };
let url = REPOSITORY_URL_DOWNLOAD.format(uuid);
let message = Soup.form_request_new_from_hash('GET', url, params);
_httpSession.queue_message(message, session => {
gotExtensionZipFile(session, message, uuid, newExtensionTmpDir, () => {
let oldExtension = Main.extensionManager.lookup(uuid);
let extensionDir = oldExtension.dir;
if (!Main.extensionManager.unloadExtension(oldExtension))
return;
FileUtils.recursivelyMoveDir(extensionDir, oldExtensionTmpDir);
FileUtils.recursivelyMoveDir(newExtensionTmpDir, extensionDir);
let extension = null;
try {
extension = Main.extensionManager.createExtensionObject(uuid, extensionDir, ExtensionUtils.ExtensionType.PER_USER);
Main.extensionManager.loadExtension(extension);
} catch (e) {
if (extension)
Main.extensionManager.unloadExtension(extension);
logError(e, 'Error loading extension %s'.format(uuid));
FileUtils.recursivelyDeleteDir(extensionDir, false);
FileUtils.recursivelyMoveDir(oldExtensionTmpDir, extensionDir);
// Restore what was there before. We can't do much if we
// fail here.
Main.extensionManager.loadExtension(oldExtension);
return;
}
FileUtils.recursivelyDeleteDir(oldExtensionTmpDir, true);
}, (code, msg) => {
log(`Error while updating extension ${uuid}: ${code} (${msg})`);
});
});
}
function checkForUpdates() {
let metadatas = {};
Main.extensionManager.getUuids().forEach(uuid => {
metadatas[uuid] = Main.extensionManager.lookup(uuid).metadata;
});
let params = { shell_version: Config.PACKAGE_VERSION,
installed: JSON.stringify(metadatas) };
let url = REPOSITORY_URL_UPDATE;
let message = Soup.form_request_new_from_hash('GET', url, params);
_httpSession.queue_message(message, () => {
if (message.status_code != Soup.KnownStatusCode.OK)
return;
let operations = JSON.parse(message.response_body.data);
for (let uuid in operations) {
let operation = operations[uuid];
if (operation == 'blacklist')
uninstallExtension(uuid);
else if (operation == 'upgrade' || operation == 'downgrade')
updateExtension(uuid);
}
});
}
var InstallExtensionDialog = GObject.registerClass(
class InstallExtensionDialog extends ModalDialog.ModalDialog {
_init(uuid, info, invocation) {
super._init({ styleClass: 'extension-dialog' });
this._uuid = uuid;
this._info = info;
this._invocation = invocation;
this.setButtons([{
label: _("Cancel"),
action: this._onCancelButtonPressed.bind(this),
key: Clutter.KEY_Escape,
}, {
label: _("Install"),
action: this._onInstallButtonPressed.bind(this),
default: true,
}]);
let content = new Dialog.MessageDialogContent({
title: _("Download and install “%s” from extensions.gnome.org?").format(info.name),
});
this.contentLayout.add(content);
}
_onCancelButtonPressed() {
this.close();
this._invocation.return_value(GLib.Variant.new('(s)', ['cancelled']));
}
_onInstallButtonPressed() {
let params = { shell_version: Config.PACKAGE_VERSION };
let url = REPOSITORY_URL_DOWNLOAD.format(this._uuid);
let message = Soup.form_request_new_from_hash('GET', url, params);
let uuid = this._uuid;
let dir = Gio.File.new_for_path(GLib.build_filenamev([global.userdatadir, 'extensions', uuid]));
let invocation = this._invocation;
function errback(code, msg) {
log(`Error while installing ${uuid}: ${code} (${msg})`);
invocation.return_dbus_error(`org.gnome.Shell.${code}`, msg || '');
}
function callback() {
try {
let extension = Main.extensionManager.createExtensionObject(uuid, dir, ExtensionUtils.ExtensionType.PER_USER);
Main.extensionManager.loadExtension(extension);
if (!Main.extensionManager.enableExtension(uuid))
throw new Error(`Cannot add ${uuid} to enabled extensions gsettings key`);
} catch (e) {
uninstallExtension(uuid);
errback('LoadExtensionError', e);
return;
}
invocation.return_value(GLib.Variant.new('(s)', ['successful']));
}
_httpSession.queue_message(message, session => {
gotExtensionZipFile(session, message, uuid, dir, callback, errback);
});
this.close();
}
});
function init() {
_httpSession = new Soup.SessionAsync({ ssl_use_system_ca_file: true });
// See: https://bugzilla.gnome.org/show_bug.cgi?id=655189 for context.
// _httpSession.add_feature(new Soup.ProxyResolverDefault());
Soup.Session.prototype.add_feature.call(_httpSession, new Soup.ProxyResolverDefault());
}