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