зеркало из https://github.com/mozilla/gecko-dev.git
201 строка
8.8 KiB
Rust
201 строка
8.8 KiB
Rust
/* This Source Code Form is subject to the terms of the Mozilla Public
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* License, v. 2.0. If a copy of the MPL was not distributed with this
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* file, You can obtain one at http://mozilla.org/MPL/2.0/. */
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//! The service worker manager persists the descriptor of any registered service workers.
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//! It also stores an active workers map, which holds descriptors of running service workers.
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//! If an active service worker timeouts, then it removes the descriptor entry from its
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//! active_workers map
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use devtools_traits::{DevtoolsPageInfo, ScriptToDevtoolsControlMsg};
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use dom::abstractworker::WorkerScriptMsg;
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use dom::bindings::structuredclone::StructuredCloneData;
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use dom::serviceworkerglobalscope::{ServiceWorkerGlobalScope, ServiceWorkerScriptMsg};
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use dom::serviceworkerregistration::longest_prefix_match;
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use ipc_channel::ipc::{self, IpcSender};
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use ipc_channel::router::ROUTER;
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use net_traits::{CustomResponseMediator, CoreResourceMsg};
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use script_traits::{ServiceWorkerMsg, ScopeThings, SWManagerMsg, SWManagerSenders, DOMMessage};
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use servo_config::prefs::PREFS;
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use servo_url::ServoUrl;
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use std::collections::HashMap;
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use std::sync::mpsc::{channel, Sender, Receiver, RecvError};
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use std::thread;
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enum Message {
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FromResource(CustomResponseMediator),
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FromConstellation(ServiceWorkerMsg)
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}
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pub struct ServiceWorkerManager {
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// map of registered service worker descriptors
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registered_workers: HashMap<ServoUrl, ScopeThings>,
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// map of active service worker descriptors
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active_workers: HashMap<ServoUrl, Sender<ServiceWorkerScriptMsg>>,
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// own sender to send messages here
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own_sender: IpcSender<ServiceWorkerMsg>,
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// receiver to receive messages from constellation
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own_port: Receiver<ServiceWorkerMsg>,
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// to receive resource messages
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resource_receiver: Receiver<CustomResponseMediator>
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}
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impl ServiceWorkerManager {
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fn new(own_sender: IpcSender<ServiceWorkerMsg>,
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from_constellation_receiver: Receiver<ServiceWorkerMsg>,
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resource_port: Receiver<CustomResponseMediator>) -> ServiceWorkerManager {
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ServiceWorkerManager {
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registered_workers: HashMap::new(),
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active_workers: HashMap::new(),
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own_sender: own_sender,
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own_port: from_constellation_receiver,
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resource_receiver: resource_port
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}
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}
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pub fn spawn_manager(sw_senders: SWManagerSenders) {
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let (own_sender, from_constellation_receiver) = ipc::channel().unwrap();
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let (resource_chan, resource_port) = ipc::channel().unwrap();
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let from_constellation = ROUTER.route_ipc_receiver_to_new_mpsc_receiver(from_constellation_receiver);
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let resource_port = ROUTER.route_ipc_receiver_to_new_mpsc_receiver(resource_port);
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let _ = sw_senders.resource_sender.send(CoreResourceMsg::NetworkMediator(resource_chan));
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let _ = sw_senders.swmanager_sender.send(SWManagerMsg::OwnSender(own_sender.clone()));
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thread::Builder::new().name("ServiceWorkerManager".to_owned()).spawn(move || {
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ServiceWorkerManager::new(own_sender,
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from_constellation,
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resource_port).handle_message();
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}).expect("Thread spawning failed");
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}
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pub fn get_matching_scope(&self, load_url: &ServoUrl) -> Option<ServoUrl> {
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for scope in self.registered_workers.keys() {
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if longest_prefix_match(&scope, load_url) {
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return Some(scope.clone());
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}
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}
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None
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}
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pub fn wakeup_serviceworker(&mut self, scope_url: ServoUrl) -> Option<Sender<ServiceWorkerScriptMsg>> {
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let scope_things = self.registered_workers.get(&scope_url);
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if let Some(scope_things) = scope_things {
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let (sender, receiver) = channel();
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let (devtools_sender, devtools_receiver) = ipc::channel().unwrap();
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if let Some(ref chan) = scope_things.devtools_chan {
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let title = format!("ServiceWorker for {}", scope_things.script_url);
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let page_info = DevtoolsPageInfo {
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title: title,
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url: scope_things.script_url.clone(),
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};
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let _ = chan.send(ScriptToDevtoolsControlMsg::NewGlobal((scope_things.init.pipeline_id,
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Some(scope_things.worker_id)),
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devtools_sender,
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page_info));
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};
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ServiceWorkerGlobalScope::run_serviceworker_scope(scope_things.clone(),
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sender.clone(),
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receiver,
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devtools_receiver,
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self.own_sender.clone(),
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scope_url.clone());
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// We store the activated worker
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self.active_workers.insert(scope_url, sender.clone());
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return Some(sender);
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} else {
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warn!("Unable to activate service worker");
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None
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}
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}
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fn handle_message(&mut self) {
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while let Ok(message) = self.receive_message() {
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let should_continue = match message {
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Message::FromConstellation(msg) => {
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self.handle_message_from_constellation(msg)
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},
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Message::FromResource(msg) => {
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self.handle_message_from_resource(msg)
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}
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};
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if !should_continue {
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break;
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}
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}
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}
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fn forward_message(&self, msg: DOMMessage, sender: &Sender<ServiceWorkerScriptMsg>) {
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let DOMMessage(data) = msg;
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let data = StructuredCloneData::Vector(data);
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let _ = sender.send(ServiceWorkerScriptMsg::CommonWorker(WorkerScriptMsg::DOMMessage(data)));
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}
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fn handle_message_from_constellation(&mut self, msg: ServiceWorkerMsg) -> bool {
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match msg {
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ServiceWorkerMsg::RegisterServiceWorker(scope_things, scope) => {
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if self.registered_workers.contains_key(&scope) {
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warn!("ScopeThings for {:?} already stored in SW-Manager", scope);
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} else {
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self.registered_workers.insert(scope, scope_things);
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}
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true
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}
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ServiceWorkerMsg::Timeout(scope) => {
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if self.active_workers.contains_key(&scope) {
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let _ = self.active_workers.remove(&scope);
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} else {
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warn!("ServiceWorker for {:?} is not active", scope);
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}
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true
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},
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ServiceWorkerMsg::ForwardDOMMessage(msg, scope_url) => {
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if self.active_workers.contains_key(&scope_url) {
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if let Some(ref sender) = self.active_workers.get(&scope_url) {
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self.forward_message(msg, &sender);
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}
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} else {
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if let Some(ref sender) = self.wakeup_serviceworker(scope_url) {
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self.forward_message(msg, &sender);
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}
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}
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true
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}
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ServiceWorkerMsg::Exit => false
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}
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}
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fn handle_message_from_resource(&mut self, mediator: CustomResponseMediator) -> bool {
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if serviceworker_enabled() {
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if let Some(scope) = self.get_matching_scope(&mediator.load_url) {
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if self.active_workers.contains_key(&scope) {
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if let Some(sender) = self.active_workers.get(&scope) {
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let _ = sender.send(ServiceWorkerScriptMsg::Response(mediator));
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}
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} else {
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if let Some(sender) = self.wakeup_serviceworker(scope) {
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let _ = sender.send(ServiceWorkerScriptMsg::Response(mediator));
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}
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}
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} else {
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let _ = mediator.response_chan.send(None);
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}
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} else {
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let _ = mediator.response_chan.send(None);
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}
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true
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}
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#[allow(unsafe_code)]
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fn receive_message(&mut self) -> Result<Message, RecvError> {
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let msg_from_constellation = &self.own_port;
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let msg_from_resource = &self.resource_receiver;
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select! {
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msg = msg_from_constellation.recv() => msg.map(Message::FromConstellation),
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msg = msg_from_resource.recv() => msg.map(Message::FromResource)
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}
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}
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}
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pub fn serviceworker_enabled() -> bool {
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PREFS.get("dom.serviceworker.enabled").as_boolean().unwrap_or(false)
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}
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