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dc2c2c8dfb
In the previous Promise.all way, we registered a promise for every
module script which means we will need to do many complex checkings like
"is this top level?" and it will make us much more difficult to understand
how the module script algorithm works.
In the new manual checking way, we will only register promises for top
level modules to notify its owner (e.g. the script element) to finish
the load. So, we can understand it much more easily and would be more
spec-aligned.
Also, I think the `Ready` and `FetchFailed` status are quite confusing
and we actually don't need them so they're removed in this patch. Then,
we will always go to `Finished` instead.
It would basically be following steps:
+-----------------+
| Failed to fetch | ----------+
+--------------+ +----------+ / +-----------------+ |
| Fetch module | ----> | Fetching | ---+ v
+--------------+ +----------+ \ +---------+ +---------------------+
| Fetched | | Advance to Finished |
+---------+ +---------------------+
| ^
v |
+-------------------+ |
| Fetch descendants | ----- if no descendants
+-------------------+
|
V
+----------------------+
| Fetching Descendants |
+----------------------+
In `Advance to Finished`, it means that module script is about to finished so it will
1. Notify all of its `ready` and `not finished` parents to finish
2. Link (instantiate) the module
3. Resolve its promise to notify owner(s) to finish
1413 lines
49 KiB
Rust
1413 lines
49 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 https://mozilla.org/MPL/2.0/. */
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//! The script module mod contains common traits and structs
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//! related to `type=module` for script thread or worker threads.
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use crate::document_loader::LoadType;
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use crate::dom::bindings::cell::DomRefCell;
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use crate::dom::bindings::codegen::Bindings::WindowBinding::WindowBinding::WindowMethods;
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use crate::dom::bindings::conversions::jsstring_to_str;
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use crate::dom::bindings::error::report_pending_exception;
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use crate::dom::bindings::error::Error;
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use crate::dom::bindings::inheritance::Castable;
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use crate::dom::bindings::refcounted::Trusted;
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use crate::dom::bindings::reflector::DomObject;
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use crate::dom::bindings::root::DomRoot;
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use crate::dom::bindings::settings_stack::AutoIncumbentScript;
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use crate::dom::bindings::str::DOMString;
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use crate::dom::bindings::trace::RootedTraceableBox;
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use crate::dom::document::Document;
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use crate::dom::element::Element;
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use crate::dom::globalscope::GlobalScope;
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use crate::dom::htmlscriptelement::{HTMLScriptElement, ScriptId};
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use crate::dom::htmlscriptelement::{ScriptOrigin, ScriptType, SCRIPT_JS_MIMES};
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use crate::dom::node::document_from_node;
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use crate::dom::performanceresourcetiming::InitiatorType;
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use crate::dom::promise::Promise;
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use crate::dom::promisenativehandler::{Callback, PromiseNativeHandler};
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use crate::dom::window::Window;
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use crate::dom::worker::TrustedWorkerAddress;
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use crate::network_listener::{self, NetworkListener};
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use crate::network_listener::{PreInvoke, ResourceTimingListener};
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use crate::realms::{enter_realm, AlreadyInRealm, InRealm};
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use crate::script_runtime::JSContext as SafeJSContext;
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use crate::task::TaskBox;
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use crate::task_source::TaskSourceName;
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use encoding_rs::UTF_8;
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use hyper_serde::Serde;
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use indexmap::{IndexMap, IndexSet};
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use ipc_channel::ipc;
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use ipc_channel::router::ROUTER;
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use js::jsapi::Handle as RawHandle;
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use js::jsapi::HandleObject;
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use js::jsapi::HandleValue as RawHandleValue;
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use js::jsapi::{CompileModule, ExceptionStackBehavior};
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use js::jsapi::{GetModuleResolveHook, JSRuntime, SetModuleResolveHook};
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use js::jsapi::{GetRequestedModules, SetModuleMetadataHook};
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use js::jsapi::{Heap, JSContext, JS_ClearPendingException, SetModulePrivate};
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use js::jsapi::{JSAutoRealm, JSObject, JSString};
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use js::jsapi::{JS_DefineProperty4, JS_NewStringCopyN, JSPROP_ENUMERATE};
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use js::jsapi::{ModuleEvaluate, ModuleInstantiate};
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use js::jsapi::{SetModuleDynamicImportHook, SetScriptPrivateReferenceHooks};
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use js::jsval::{JSVal, PrivateValue, UndefinedValue};
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use js::rust::jsapi_wrapped::{GetRequestedModuleSpecifier, JS_GetPendingException};
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use js::rust::jsapi_wrapped::{JS_GetArrayLength, JS_GetElement};
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use js::rust::transform_u16_to_source_text;
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use js::rust::wrappers::JS_SetPendingException;
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use js::rust::CompileOptionsWrapper;
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use js::rust::{Handle, HandleValue, IntoHandle};
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use mime::Mime;
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use net_traits::request::{CredentialsMode, Destination, ParserMetadata};
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use net_traits::request::{Referrer, RequestBuilder, RequestMode};
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use net_traits::{FetchMetadata, Metadata};
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use net_traits::{FetchResponseListener, NetworkError};
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use net_traits::{ResourceFetchTiming, ResourceTimingType};
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use servo_url::ServoUrl;
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use std::collections::HashSet;
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use std::ffi;
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use std::rc::Rc;
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use std::str::FromStr;
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use std::sync::{Arc, Mutex};
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use url::ParseError as UrlParseError;
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#[allow(unsafe_code)]
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unsafe fn gen_type_error(global: &GlobalScope, string: String) -> RethrowError {
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rooted!(in(*global.get_cx()) let mut thrown = UndefinedValue());
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Error::Type(string).to_jsval(*global.get_cx(), &global, thrown.handle_mut());
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return RethrowError(RootedTraceableBox::from_box(Heap::boxed(thrown.get())));
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}
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#[derive(JSTraceable)]
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pub struct ModuleObject(Box<Heap<*mut JSObject>>);
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impl ModuleObject {
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#[allow(unsafe_code)]
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pub fn handle(&self) -> HandleObject {
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unsafe { self.0.handle() }
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}
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}
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#[derive(JSTraceable)]
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pub struct RethrowError(RootedTraceableBox<Heap<JSVal>>);
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impl RethrowError {
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fn handle(&self) -> Handle<JSVal> {
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self.0.handle()
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}
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}
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impl Clone for RethrowError {
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fn clone(&self) -> Self {
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Self(RootedTraceableBox::from_box(Heap::boxed(
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self.0.get().clone(),
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)))
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}
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}
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struct ModuleScript {
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base_url: ServoUrl,
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}
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/// Identity for a module which will be
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/// used to retrieve the module when we'd
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/// like to get it from module map.
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///
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/// For example, we will save module parents with
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/// module identity so that we can get module tree
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/// from a descendant no matter the parent is an
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/// inline script or a external script
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#[derive(Clone, Eq, Hash, JSTraceable, PartialEq)]
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pub enum ModuleIdentity {
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ScriptId(ScriptId),
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ModuleUrl(ServoUrl),
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}
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impl ModuleIdentity {
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pub fn get_module_tree(&self, global: &GlobalScope) -> Rc<ModuleTree> {
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match self {
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ModuleIdentity::ModuleUrl(url) => {
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let module_map = global.get_module_map().borrow();
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module_map.get(&url.clone()).unwrap().clone()
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},
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ModuleIdentity::ScriptId(script_id) => {
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let inline_module_map = global.get_inline_module_map().borrow();
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inline_module_map.get(&script_id).unwrap().clone()
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},
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}
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}
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}
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#[derive(JSTraceable)]
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pub struct ModuleTree {
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url: ServoUrl,
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text: DomRefCell<DOMString>,
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record: DomRefCell<Option<ModuleObject>>,
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status: DomRefCell<ModuleStatus>,
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// The spec maintains load order for descendants, so we use an indexset for descendants and
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// parents. This isn't actually necessary for parents however the IndexSet APIs don't
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// interop with HashSet, and IndexSet isn't very expensive
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// (https://github.com/bluss/indexmap/issues/110)
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//
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// By default all maps in web specs are ordered maps
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// (https://infra.spec.whatwg.org/#ordered-map), however we can usually get away with using
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// stdlib maps and sets because we rarely iterate over them.
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parent_identities: DomRefCell<IndexSet<ModuleIdentity>>,
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descendant_urls: DomRefCell<IndexSet<ServoUrl>>,
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// A set to memoize which descendants are under fetching
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incomplete_fetch_urls: DomRefCell<IndexSet<ServoUrl>>,
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visited_urls: DomRefCell<HashSet<ServoUrl>>,
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rethrow_error: DomRefCell<Option<RethrowError>>,
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network_error: DomRefCell<Option<NetworkError>>,
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// A promise for owners to execute when the module tree
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// is finished
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promise: DomRefCell<Option<Rc<Promise>>>,
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external: bool,
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}
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impl ModuleTree {
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pub fn new(url: ServoUrl, external: bool, visited_urls: HashSet<ServoUrl>) -> Self {
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ModuleTree {
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url,
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text: DomRefCell::new(DOMString::new()),
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record: DomRefCell::new(None),
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status: DomRefCell::new(ModuleStatus::Initial),
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parent_identities: DomRefCell::new(IndexSet::new()),
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descendant_urls: DomRefCell::new(IndexSet::new()),
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incomplete_fetch_urls: DomRefCell::new(IndexSet::new()),
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visited_urls: DomRefCell::new(visited_urls),
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rethrow_error: DomRefCell::new(None),
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network_error: DomRefCell::new(None),
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promise: DomRefCell::new(None),
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external,
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}
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}
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pub fn get_status(&self) -> ModuleStatus {
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self.status.borrow().clone()
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}
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pub fn set_status(&self, status: ModuleStatus) {
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*self.status.borrow_mut() = status;
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}
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pub fn get_record(&self) -> &DomRefCell<Option<ModuleObject>> {
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&self.record
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}
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pub fn set_record(&self, record: ModuleObject) {
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*self.record.borrow_mut() = Some(record);
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}
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pub fn get_rethrow_error(&self) -> &DomRefCell<Option<RethrowError>> {
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&self.rethrow_error
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}
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pub fn set_rethrow_error(&self, rethrow_error: RethrowError) {
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*self.rethrow_error.borrow_mut() = Some(rethrow_error);
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}
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pub fn get_network_error(&self) -> &DomRefCell<Option<NetworkError>> {
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&self.network_error
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}
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pub fn set_network_error(&self, network_error: NetworkError) {
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*self.network_error.borrow_mut() = Some(network_error);
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}
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pub fn get_text(&self) -> &DomRefCell<DOMString> {
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&self.text
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}
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pub fn set_text(&self, module_text: DOMString) {
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*self.text.borrow_mut() = module_text;
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}
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pub fn get_incomplete_fetch_urls(&self) -> &DomRefCell<IndexSet<ServoUrl>> {
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&self.incomplete_fetch_urls
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}
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pub fn get_descendant_urls(&self) -> &DomRefCell<IndexSet<ServoUrl>> {
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&self.descendant_urls
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}
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pub fn get_parent_urls(&self) -> IndexSet<ServoUrl> {
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let parent_identities = self.parent_identities.borrow();
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parent_identities
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.iter()
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.filter_map(|parent_identity| match parent_identity {
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ModuleIdentity::ScriptId(_) => None,
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ModuleIdentity::ModuleUrl(url) => Some(url.clone()),
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})
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.collect()
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}
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pub fn insert_parent_identity(&self, parent_identity: ModuleIdentity) {
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self.parent_identities.borrow_mut().insert(parent_identity);
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}
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pub fn insert_incomplete_fetch_url(&self, dependency: ServoUrl) {
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self.incomplete_fetch_urls.borrow_mut().insert(dependency);
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}
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pub fn remove_incomplete_fetch_url(&self, dependency: ServoUrl) {
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self.incomplete_fetch_urls.borrow_mut().remove(&dependency);
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}
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/// Find circular dependencies in non-recursive way
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///
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/// This function is basically referred to
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/// [this blog post](https://breakingcode.wordpress.com/2013/03/11/an-example-dependency-resolution-algorithm-in-python/).
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///
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/// The only difference is, in that blog post, its algorithm will throw errors while finding circular
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/// dependencies; however, in our use case, we'd like to find circular dependencies so we will just
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/// return it.
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pub fn find_circular_dependencies(&self, global: &GlobalScope) -> IndexSet<ServoUrl> {
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let module_map = global.get_module_map().borrow();
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// A map for checking dependencies and using the module url as key
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let mut module_deps: IndexMap<ServoUrl, IndexSet<ServoUrl>> = module_map
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.iter()
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.map(|(module_url, module)| {
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(module_url.clone(), module.descendant_urls.borrow().clone())
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})
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.collect();
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while module_deps.len() != 0 {
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// Get all dependencies with no dependencies
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let ready: IndexSet<ServoUrl> = module_deps
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.iter()
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.filter_map(|(module_url, descendant_urls)| {
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if descendant_urls.len() == 0 {
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Some(module_url.clone())
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} else {
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None
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}
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})
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.collect();
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// If there's no ready module but we're still in the loop,
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// it means we find circular modules, then we can return them.
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if ready.len() == 0 {
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return module_deps
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.iter()
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.map(|(url, _)| url.clone())
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.collect::<IndexSet<ServoUrl>>();
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}
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// Remove ready modules from the dependency map
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for module_url in ready.iter() {
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module_deps.remove(&module_url.clone());
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}
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// Also make sure to remove the ready modules from the
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// remaining module dependencies as well
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for (_, deps) in module_deps.iter_mut() {
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*deps = deps
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.difference(&ready)
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.into_iter()
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.cloned()
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.collect::<IndexSet<ServoUrl>>();
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}
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}
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IndexSet::new()
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}
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// We just leverage the power of Promise to run the task for `finish` the owner.
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// Thus, we will always `resolve` it and no need to register a callback for `reject`
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pub fn append_handler(&self, owner: ModuleOwner, module_identity: ModuleIdentity) {
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let this = owner.clone();
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let identity = module_identity.clone();
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let handler = PromiseNativeHandler::new(
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&owner.global(),
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Some(ModuleHandler::new(Box::new(
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task!(fetched_resolve: move || {
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this.notify_owner_to_finish(identity);
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}),
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))),
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None,
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);
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let realm = enter_realm(&*owner.global());
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let comp = InRealm::Entered(&realm);
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let _ais = AutoIncumbentScript::new(&*owner.global());
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let mut promise = self.promise.borrow_mut();
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match promise.as_ref() {
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Some(promise) => promise.append_native_handler(&handler, comp),
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None => {
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let new_promise = Promise::new_in_current_realm(&owner.global(), comp);
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new_promise.append_native_handler(&handler, comp);
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*promise = Some(new_promise);
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},
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}
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}
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}
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#[derive(Clone, Copy, Debug, JSTraceable, PartialEq, PartialOrd)]
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pub enum ModuleStatus {
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Initial,
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Fetching,
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FetchingDescendants,
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Finished,
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}
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impl ModuleTree {
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#[allow(unsafe_code)]
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/// https://html.spec.whatwg.org/multipage/#creating-a-module-script
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/// Step 7-11.
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fn compile_module_script(
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&self,
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global: &GlobalScope,
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module_script_text: DOMString,
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url: ServoUrl,
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) -> Result<ModuleObject, RethrowError> {
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let module: Vec<u16> = module_script_text.encode_utf16().collect();
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let url_cstr = ffi::CString::new(url.as_str().as_bytes()).unwrap();
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let _ac = JSAutoRealm::new(*global.get_cx(), *global.reflector().get_jsobject());
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let compile_options =
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unsafe { CompileOptionsWrapper::new(*global.get_cx(), url_cstr.as_ptr(), 1) };
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unsafe {
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rooted!(in(*global.get_cx()) let mut module_script = CompileModule(
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*global.get_cx(),
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compile_options.ptr,
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&mut transform_u16_to_source_text(&module),
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));
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|
|
if module_script.is_null() {
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warn!("fail to compile module script of {}", url);
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|
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rooted!(in(*global.get_cx()) let mut exception = UndefinedValue());
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assert!(JS_GetPendingException(
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*global.get_cx(),
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&mut exception.handle_mut()
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));
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JS_ClearPendingException(*global.get_cx());
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|
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return Err(RethrowError(RootedTraceableBox::from_box(Heap::boxed(
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exception.get(),
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))));
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}
|
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|
|
let module_script_data = Box::new(ModuleScript {
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base_url: url.clone(),
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});
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|
|
SetModulePrivate(
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module_script.get(),
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|
&PrivateValue(Box::into_raw(module_script_data) as *const _),
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);
|
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|
|
debug!("module script of {} compile done", url);
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|
|
|
self.resolve_requested_module_specifiers(
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|
&global,
|
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module_script.handle().into_handle(),
|
|
url.clone(),
|
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)
|
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.map(|_| ModuleObject(Heap::boxed(*module_script)))
|
|
}
|
|
}
|
|
|
|
#[allow(unsafe_code)]
|
|
/// https://html.spec.whatwg.org/multipage/#fetch-the-descendants-of-and-link-a-module-script
|
|
/// Step 5-2.
|
|
pub fn instantiate_module_tree(
|
|
&self,
|
|
global: &GlobalScope,
|
|
module_record: HandleObject,
|
|
) -> Result<(), RethrowError> {
|
|
let _ac = JSAutoRealm::new(*global.get_cx(), *global.reflector().get_jsobject());
|
|
|
|
unsafe {
|
|
if !ModuleInstantiate(*global.get_cx(), module_record) {
|
|
warn!("fail to instantiate module");
|
|
|
|
rooted!(in(*global.get_cx()) let mut exception = UndefinedValue());
|
|
assert!(JS_GetPendingException(
|
|
*global.get_cx(),
|
|
&mut exception.handle_mut()
|
|
));
|
|
JS_ClearPendingException(*global.get_cx());
|
|
|
|
Err(RethrowError(RootedTraceableBox::from_box(Heap::boxed(
|
|
exception.get(),
|
|
))))
|
|
} else {
|
|
debug!("module instantiated successfully");
|
|
|
|
Ok(())
|
|
}
|
|
}
|
|
}
|
|
|
|
#[allow(unsafe_code)]
|
|
pub fn execute_module(
|
|
&self,
|
|
global: &GlobalScope,
|
|
module_record: HandleObject,
|
|
) -> Result<(), RethrowError> {
|
|
let _ac = JSAutoRealm::new(*global.get_cx(), *global.reflector().get_jsobject());
|
|
|
|
unsafe {
|
|
if !ModuleEvaluate(*global.get_cx(), module_record) {
|
|
warn!("fail to evaluate module");
|
|
|
|
rooted!(in(*global.get_cx()) let mut exception = UndefinedValue());
|
|
assert!(JS_GetPendingException(
|
|
*global.get_cx(),
|
|
&mut exception.handle_mut()
|
|
));
|
|
JS_ClearPendingException(*global.get_cx());
|
|
|
|
Err(RethrowError(RootedTraceableBox::from_box(Heap::boxed(
|
|
exception.get(),
|
|
))))
|
|
} else {
|
|
debug!("module evaluated successfully");
|
|
Ok(())
|
|
}
|
|
}
|
|
}
|
|
|
|
#[allow(unsafe_code)]
|
|
pub fn report_error(&self, global: &GlobalScope) {
|
|
let module_error = self.rethrow_error.borrow();
|
|
|
|
if let Some(exception) = &*module_error {
|
|
unsafe {
|
|
let ar = enter_realm(&*global);
|
|
JS_SetPendingException(
|
|
*global.get_cx(),
|
|
exception.handle(),
|
|
ExceptionStackBehavior::Capture,
|
|
);
|
|
report_pending_exception(*global.get_cx(), true, InRealm::Entered(&ar));
|
|
}
|
|
}
|
|
}
|
|
|
|
#[allow(unsafe_code)]
|
|
fn resolve_requested_module_specifiers(
|
|
&self,
|
|
global: &GlobalScope,
|
|
module_object: HandleObject,
|
|
base_url: ServoUrl,
|
|
) -> Result<IndexSet<ServoUrl>, RethrowError> {
|
|
let _ac = JSAutoRealm::new(*global.get_cx(), *global.reflector().get_jsobject());
|
|
|
|
let mut specifier_urls = IndexSet::new();
|
|
|
|
unsafe {
|
|
rooted!(in(*global.get_cx()) let requested_modules = GetRequestedModules(*global.get_cx(), module_object));
|
|
|
|
let mut length = 0;
|
|
|
|
if !JS_GetArrayLength(*global.get_cx(), requested_modules.handle(), &mut length) {
|
|
let module_length_error =
|
|
gen_type_error(&global, "Wrong length of requested modules".to_owned());
|
|
|
|
return Err(module_length_error);
|
|
}
|
|
|
|
for index in 0..length {
|
|
rooted!(in(*global.get_cx()) let mut element = UndefinedValue());
|
|
|
|
if !JS_GetElement(
|
|
*global.get_cx(),
|
|
requested_modules.handle(),
|
|
index,
|
|
&mut element.handle_mut(),
|
|
) {
|
|
let get_element_error =
|
|
gen_type_error(&global, "Failed to get requested module".to_owned());
|
|
|
|
return Err(get_element_error);
|
|
}
|
|
|
|
rooted!(in(*global.get_cx()) let specifier = GetRequestedModuleSpecifier(
|
|
*global.get_cx(), element.handle()
|
|
));
|
|
|
|
let url = ModuleTree::resolve_module_specifier(
|
|
*global.get_cx(),
|
|
&base_url,
|
|
specifier.handle().into_handle(),
|
|
);
|
|
|
|
if url.is_err() {
|
|
let specifier_error =
|
|
gen_type_error(&global, "Wrong module specifier".to_owned());
|
|
|
|
return Err(specifier_error);
|
|
}
|
|
|
|
specifier_urls.insert(url.unwrap());
|
|
}
|
|
}
|
|
|
|
Ok(specifier_urls)
|
|
}
|
|
|
|
/// The following module specifiers are allowed by the spec:
|
|
/// - a valid absolute URL
|
|
/// - a valid relative URL that starts with "/", "./" or "../"
|
|
///
|
|
/// Bareword module specifiers are currently disallowed as these may be given
|
|
/// special meanings in the future.
|
|
/// https://html.spec.whatwg.org/multipage/#resolve-a-module-specifier
|
|
#[allow(unsafe_code)]
|
|
fn resolve_module_specifier(
|
|
cx: *mut JSContext,
|
|
url: &ServoUrl,
|
|
specifier: RawHandle<*mut JSString>,
|
|
) -> Result<ServoUrl, UrlParseError> {
|
|
let specifier_str = unsafe { jsstring_to_str(cx, *specifier) };
|
|
|
|
// Step 1.
|
|
if let Ok(specifier_url) = ServoUrl::parse(&specifier_str) {
|
|
return Ok(specifier_url);
|
|
}
|
|
|
|
// Step 2.
|
|
if !specifier_str.starts_with("/") &&
|
|
!specifier_str.starts_with("./") &&
|
|
!specifier_str.starts_with("../")
|
|
{
|
|
return Err(UrlParseError::InvalidDomainCharacter);
|
|
}
|
|
|
|
// Step 3.
|
|
return ServoUrl::parse_with_base(Some(url), &specifier_str.clone());
|
|
}
|
|
|
|
/// https://html.spec.whatwg.org/multipage/#finding-the-first-parse-error
|
|
fn find_first_parse_error(
|
|
&self,
|
|
global: &GlobalScope,
|
|
discovered_urls: &mut HashSet<ServoUrl>,
|
|
) -> (Option<NetworkError>, Option<RethrowError>) {
|
|
// 3.
|
|
discovered_urls.insert(self.url.clone());
|
|
|
|
// 4.
|
|
let record = self.get_record().borrow();
|
|
if record.is_none() {
|
|
return (
|
|
self.network_error.borrow().clone(),
|
|
self.rethrow_error.borrow().clone(),
|
|
);
|
|
}
|
|
|
|
let module_map = global.get_module_map().borrow();
|
|
let mut parse_error: Option<RethrowError> = None;
|
|
|
|
// 5-6.
|
|
let descendant_urls = self.descendant_urls.borrow();
|
|
for descendant_module in descendant_urls
|
|
.iter()
|
|
// 7.
|
|
.filter_map(|url| module_map.get(&url.clone()))
|
|
{
|
|
// 8-2.
|
|
if discovered_urls.contains(&descendant_module.url) {
|
|
continue;
|
|
}
|
|
|
|
// 8-3.
|
|
let (child_network_error, child_parse_error) =
|
|
descendant_module.find_first_parse_error(&global, discovered_urls);
|
|
|
|
// Due to network error's priority higher than parse error,
|
|
// we will return directly when we meet a network error.
|
|
if child_network_error.is_some() {
|
|
return (child_network_error, None);
|
|
}
|
|
|
|
// 8-4.
|
|
//
|
|
// In case of having any network error in other descendants,
|
|
// we will store the "first" parse error and keep running this
|
|
// loop to ensure we don't have any network error.
|
|
if child_parse_error.is_some() && parse_error.is_none() {
|
|
parse_error = child_parse_error;
|
|
}
|
|
}
|
|
|
|
// Step 9.
|
|
return (None, parse_error);
|
|
}
|
|
|
|
#[allow(unsafe_code)]
|
|
/// https://html.spec.whatwg.org/multipage/#fetch-the-descendants-of-a-module-script
|
|
fn fetch_module_descendants(
|
|
&self,
|
|
owner: &ModuleOwner,
|
|
destination: Destination,
|
|
credentials_mode: CredentialsMode,
|
|
parent_identity: ModuleIdentity,
|
|
) {
|
|
debug!("Start to load dependencies of {}", self.url.clone());
|
|
|
|
let global = owner.global();
|
|
|
|
self.set_status(ModuleStatus::FetchingDescendants);
|
|
|
|
let specifier_urls = {
|
|
let raw_record = self.record.borrow();
|
|
match raw_record.as_ref() {
|
|
// Step 1.
|
|
None => {
|
|
self.set_status(ModuleStatus::Finished);
|
|
debug!(
|
|
"Module {} doesn't have module record but tried to load descendants.",
|
|
self.url.clone()
|
|
);
|
|
return;
|
|
},
|
|
// Step 5.
|
|
Some(raw_record) => self.resolve_requested_module_specifiers(
|
|
&global,
|
|
raw_record.handle(),
|
|
self.url.clone(),
|
|
),
|
|
}
|
|
};
|
|
|
|
match specifier_urls {
|
|
// Step 3.
|
|
Ok(valid_specifier_urls) if valid_specifier_urls.len() == 0 => {
|
|
debug!("Module {} doesn't have any dependencies.", self.url.clone());
|
|
self.advance_finished_and_link(&global);
|
|
},
|
|
Ok(valid_specifier_urls) => {
|
|
self.descendant_urls
|
|
.borrow_mut()
|
|
.extend(valid_specifier_urls.clone());
|
|
|
|
let mut urls = IndexSet::new();
|
|
let mut visited_urls = self.visited_urls.borrow_mut();
|
|
|
|
for parsed_url in valid_specifier_urls {
|
|
// Step 5-3.
|
|
if !visited_urls.contains(&parsed_url) {
|
|
// Step 5-3-1.
|
|
urls.insert(parsed_url.clone());
|
|
// Step 5-3-2.
|
|
visited_urls.insert(parsed_url.clone());
|
|
|
|
self.insert_incomplete_fetch_url(parsed_url.clone());
|
|
}
|
|
}
|
|
|
|
// Step 3.
|
|
if urls.len() == 0 {
|
|
debug!(
|
|
"After checking with visited urls, module {} doesn't have dependencies to load.",
|
|
self.url.clone()
|
|
);
|
|
self.advance_finished_and_link(&global);
|
|
return;
|
|
}
|
|
|
|
// Step 8.
|
|
for url in urls {
|
|
// https://html.spec.whatwg.org/multipage/#internal-module-script-graph-fetching-procedure
|
|
// Step 1.
|
|
assert!(visited_urls.get(&url).is_some());
|
|
|
|
// Step 2.
|
|
fetch_single_module_script(
|
|
owner.clone(),
|
|
url.clone(),
|
|
visited_urls.clone(),
|
|
destination.clone(),
|
|
Referrer::Client,
|
|
ParserMetadata::NotParserInserted,
|
|
"".to_owned(), // integrity
|
|
credentials_mode.clone(),
|
|
Some(parent_identity.clone()),
|
|
false,
|
|
);
|
|
}
|
|
},
|
|
Err(error) => {
|
|
self.set_rethrow_error(error);
|
|
self.advance_finished_and_link(&global);
|
|
},
|
|
}
|
|
}
|
|
|
|
/// https://html.spec.whatwg.org/multipage/#fetch-the-descendants-of-and-link-a-module-script
|
|
/// step 4-7.
|
|
fn advance_finished_and_link(&self, global: &GlobalScope) {
|
|
{
|
|
let descendant_urls = self.descendant_urls.borrow();
|
|
|
|
// Check if there's any dependencies under fetching.
|
|
//
|
|
// We can't only check `incomplete fetches` here because...
|
|
//
|
|
// For example, module `A` has descendants `B`, `C`
|
|
// while `A` has added them to incomplete fetches, it's possible
|
|
// `B` has finished but `C` is not yet fired its fetch; in this case,
|
|
// `incomplete fetches` will be `zero` but the module is actually not ready
|
|
// to finish. Thus, we need to check dependencies directly instead of
|
|
// incomplete fetches here.
|
|
if !is_all_dependencies_ready(&descendant_urls, &global) {
|
|
// When we found the `incomplete fetches` is bigger than zero,
|
|
// we will need to check if there's any circular dependency.
|
|
//
|
|
// If there's no circular dependencies but there are incomplete fetches,
|
|
// it means it needs to wait for finish.
|
|
//
|
|
// Or, if there are circular dependencies, then we need to confirm
|
|
// no circular dependencies are fetching.
|
|
//
|
|
// if there's any circular dependencies and they all proceeds to status
|
|
// higher than `FetchingDescendants`, then it means we can proceed to finish.
|
|
let circular_deps = self.find_circular_dependencies(&global);
|
|
|
|
if circular_deps.len() == 0 || !is_all_dependencies_ready(&circular_deps, &global) {
|
|
return;
|
|
}
|
|
}
|
|
}
|
|
|
|
self.set_status(ModuleStatus::Finished);
|
|
|
|
debug!("Going to advance and finish for: {}", self.url.clone());
|
|
|
|
{
|
|
// Notify parents of this module to finish
|
|
//
|
|
// Before notifying, if the parent module has already had zero incomplete
|
|
// fetches, then it means we don't need to notify it.
|
|
let parent_identities = self.parent_identities.borrow();
|
|
for parent_identity in parent_identities.iter() {
|
|
let parent_tree = parent_identity.get_module_tree(&global);
|
|
|
|
let incomplete_count_before_remove = {
|
|
let incomplete_urls = parent_tree.get_incomplete_fetch_urls().borrow();
|
|
incomplete_urls.len()
|
|
};
|
|
|
|
if incomplete_count_before_remove > 0 {
|
|
parent_tree.remove_incomplete_fetch_url(self.url.clone());
|
|
parent_tree.advance_finished_and_link(&global);
|
|
}
|
|
}
|
|
}
|
|
|
|
let mut discovered_urls: HashSet<ServoUrl> = HashSet::new();
|
|
let (network_error, rethrow_error) =
|
|
self.find_first_parse_error(&global, &mut discovered_urls);
|
|
|
|
match (network_error, rethrow_error) {
|
|
(Some(network_error), _) => {
|
|
self.set_network_error(network_error);
|
|
},
|
|
(None, None) => {
|
|
let module_record = self.get_record().borrow();
|
|
if let Some(record) = &*module_record {
|
|
let instantiated = self.instantiate_module_tree(&global, record.handle());
|
|
|
|
if let Err(exception) = instantiated {
|
|
self.set_rethrow_error(exception);
|
|
}
|
|
}
|
|
},
|
|
(None, Some(error)) => {
|
|
self.set_rethrow_error(error);
|
|
},
|
|
}
|
|
|
|
let promise = self.promise.borrow();
|
|
if let Some(promise) = promise.as_ref() {
|
|
promise.resolve_native(&());
|
|
}
|
|
}
|
|
}
|
|
|
|
// Iterate the given dependency urls to see if it and its descendants are fetching or not.
|
|
// When a module status is `FetchingDescendants`, it's possible that the module is a circular
|
|
// module so we will also check its descendants.
|
|
fn is_all_dependencies_ready(dependencies: &IndexSet<ServoUrl>, global: &GlobalScope) -> bool {
|
|
dependencies.iter().all(|dep| {
|
|
let module_map = global.get_module_map().borrow();
|
|
match module_map.get(&dep) {
|
|
Some(module) => {
|
|
let module_descendants = module.get_descendant_urls().borrow();
|
|
|
|
module.get_status() >= ModuleStatus::FetchingDescendants &&
|
|
module_descendants.iter().all(|descendant_url| {
|
|
match module_map.get(&descendant_url) {
|
|
Some(m) => m.get_status() >= ModuleStatus::FetchingDescendants,
|
|
None => false,
|
|
}
|
|
})
|
|
},
|
|
None => false,
|
|
}
|
|
})
|
|
}
|
|
|
|
#[derive(JSTraceable, MallocSizeOf)]
|
|
struct ModuleHandler {
|
|
#[ignore_malloc_size_of = "Measuring trait objects is hard"]
|
|
task: DomRefCell<Option<Box<dyn TaskBox>>>,
|
|
}
|
|
|
|
impl ModuleHandler {
|
|
pub fn new(task: Box<dyn TaskBox>) -> Box<dyn Callback> {
|
|
Box::new(Self {
|
|
task: DomRefCell::new(Some(task)),
|
|
})
|
|
}
|
|
}
|
|
|
|
impl Callback for ModuleHandler {
|
|
fn callback(&self, _cx: SafeJSContext, _v: HandleValue, _realm: InRealm) {
|
|
let task = self.task.borrow_mut().take().unwrap();
|
|
task.run_box();
|
|
}
|
|
}
|
|
|
|
/// The owner of the module
|
|
/// It can be `worker` or `script` element
|
|
#[derive(Clone)]
|
|
pub enum ModuleOwner {
|
|
#[allow(dead_code)]
|
|
Worker(TrustedWorkerAddress),
|
|
Window(Trusted<HTMLScriptElement>),
|
|
}
|
|
|
|
impl ModuleOwner {
|
|
pub fn global(&self) -> DomRoot<GlobalScope> {
|
|
match &self {
|
|
ModuleOwner::Worker(worker) => (*worker.root().clone()).global(),
|
|
ModuleOwner::Window(script) => (*script.root()).global(),
|
|
}
|
|
}
|
|
|
|
pub fn notify_owner_to_finish(&self, module_identity: ModuleIdentity) {
|
|
match &self {
|
|
ModuleOwner::Worker(_) => unimplemented!(),
|
|
ModuleOwner::Window(script) => {
|
|
let global = self.global();
|
|
|
|
let document = document_from_node(&*script.root());
|
|
|
|
let load = {
|
|
let module_tree = module_identity.get_module_tree(&global);
|
|
|
|
let network_error = module_tree.get_network_error().borrow();
|
|
match network_error.as_ref() {
|
|
Some(network_error) => Err(network_error.clone()),
|
|
None => match module_identity {
|
|
ModuleIdentity::ModuleUrl(script_src) => Ok(ScriptOrigin::external(
|
|
module_tree.get_text().borrow().clone(),
|
|
script_src.clone(),
|
|
ScriptType::Module,
|
|
)),
|
|
ModuleIdentity::ScriptId(_) => Ok(ScriptOrigin::internal(
|
|
module_tree.get_text().borrow().clone(),
|
|
document.base_url().clone(),
|
|
ScriptType::Module,
|
|
)),
|
|
},
|
|
}
|
|
};
|
|
|
|
let r#async = script
|
|
.root()
|
|
.upcast::<Element>()
|
|
.has_attribute(&local_name!("async"));
|
|
|
|
if !r#async && (&*script.root()).get_parser_inserted() {
|
|
document.deferred_script_loaded(&*script.root(), load);
|
|
} else if !r#async && !(&*script.root()).get_non_blocking() {
|
|
document.asap_in_order_script_loaded(&*script.root(), load);
|
|
} else {
|
|
document.asap_script_loaded(&*script.root(), load);
|
|
};
|
|
},
|
|
}
|
|
}
|
|
}
|
|
|
|
/// The context required for asynchronously loading an external module script source.
|
|
struct ModuleContext {
|
|
/// The owner of the module that initiated the request.
|
|
owner: ModuleOwner,
|
|
/// The response body received to date.
|
|
data: Vec<u8>,
|
|
/// The response metadata received to date.
|
|
metadata: Option<Metadata>,
|
|
/// The initial URL requested.
|
|
url: ServoUrl,
|
|
/// Destination of current module context
|
|
destination: Destination,
|
|
/// Credentials Mode of current module context
|
|
credentials_mode: CredentialsMode,
|
|
/// Indicates whether the request failed, and why
|
|
status: Result<(), NetworkError>,
|
|
/// Timing object for this resource
|
|
resource_timing: ResourceFetchTiming,
|
|
}
|
|
|
|
impl FetchResponseListener for ModuleContext {
|
|
fn process_request_body(&mut self) {} // TODO(cybai): Perhaps add custom steps to perform fetch here?
|
|
|
|
fn process_request_eof(&mut self) {} // TODO(cybai): Perhaps add custom steps to perform fetch here?
|
|
|
|
fn process_response(&mut self, metadata: Result<FetchMetadata, NetworkError>) {
|
|
self.metadata = metadata.ok().map(|meta| match meta {
|
|
FetchMetadata::Unfiltered(m) => m,
|
|
FetchMetadata::Filtered { unsafe_, .. } => unsafe_,
|
|
});
|
|
|
|
let status_code = self
|
|
.metadata
|
|
.as_ref()
|
|
.and_then(|m| match m.status {
|
|
Some((c, _)) => Some(c),
|
|
_ => None,
|
|
})
|
|
.unwrap_or(0);
|
|
|
|
self.status = match status_code {
|
|
0 => Err(NetworkError::Internal(
|
|
"No http status code received".to_owned(),
|
|
)),
|
|
200..=299 => Ok(()), // HTTP ok status codes
|
|
_ => Err(NetworkError::Internal(format!(
|
|
"HTTP error code {}",
|
|
status_code
|
|
))),
|
|
};
|
|
}
|
|
|
|
fn process_response_chunk(&mut self, mut chunk: Vec<u8>) {
|
|
if self.status.is_ok() {
|
|
self.data.append(&mut chunk);
|
|
}
|
|
}
|
|
|
|
/// <https://html.spec.whatwg.org/multipage/#fetch-a-single-module-script>
|
|
/// Step 9-12
|
|
#[allow(unsafe_code)]
|
|
fn process_response_eof(&mut self, response: Result<ResourceFetchTiming, NetworkError>) {
|
|
let global = self.owner.global();
|
|
|
|
if let Some(window) = global.downcast::<Window>() {
|
|
window
|
|
.Document()
|
|
.finish_load(LoadType::Script(self.url.clone()));
|
|
}
|
|
|
|
// Step 9-1 & 9-2.
|
|
let load = response.and(self.status.clone()).and_then(|_| {
|
|
// Step 9-3.
|
|
let meta = self.metadata.take().unwrap();
|
|
|
|
if let Some(content_type) = meta.content_type.map(Serde::into_inner) {
|
|
if let Ok(content_type) = Mime::from_str(&content_type.to_string()) {
|
|
let essence_mime = content_type.essence_str();
|
|
|
|
if !SCRIPT_JS_MIMES.contains(&essence_mime) {
|
|
return Err(NetworkError::Internal(format!(
|
|
"Invalid MIME type: {}",
|
|
essence_mime
|
|
)));
|
|
}
|
|
} else {
|
|
return Err(NetworkError::Internal(format!(
|
|
"Failed to parse MIME type: {}",
|
|
content_type.to_string()
|
|
)));
|
|
}
|
|
} else {
|
|
return Err(NetworkError::Internal("No MIME type".into()));
|
|
}
|
|
|
|
// Step 10.
|
|
let (source_text, _, _) = UTF_8.decode(&self.data);
|
|
Ok(ScriptOrigin::external(
|
|
DOMString::from(source_text),
|
|
meta.final_url,
|
|
ScriptType::Module,
|
|
))
|
|
});
|
|
|
|
let module_tree = {
|
|
let module_map = global.get_module_map().borrow();
|
|
module_map.get(&self.url.clone()).unwrap().clone()
|
|
};
|
|
|
|
module_tree.remove_incomplete_fetch_url(self.url.clone());
|
|
|
|
// Step 12.
|
|
match load {
|
|
Err(err) => {
|
|
error!("Failed to fetch {} with error {:?}", self.url.clone(), err);
|
|
module_tree.set_network_error(err);
|
|
module_tree.advance_finished_and_link(&global);
|
|
},
|
|
Ok(ref resp_mod_script) => {
|
|
module_tree.set_text(resp_mod_script.text());
|
|
|
|
let compiled_module = module_tree.compile_module_script(
|
|
&global,
|
|
resp_mod_script.text(),
|
|
self.url.clone(),
|
|
);
|
|
|
|
match compiled_module {
|
|
Err(exception) => {
|
|
module_tree.set_rethrow_error(exception);
|
|
module_tree.advance_finished_and_link(&global);
|
|
},
|
|
Ok(record) => {
|
|
module_tree.set_record(record);
|
|
|
|
module_tree.fetch_module_descendants(
|
|
&self.owner,
|
|
self.destination.clone(),
|
|
self.credentials_mode.clone(),
|
|
ModuleIdentity::ModuleUrl(self.url.clone()),
|
|
);
|
|
},
|
|
}
|
|
},
|
|
}
|
|
}
|
|
|
|
fn resource_timing_mut(&mut self) -> &mut ResourceFetchTiming {
|
|
&mut self.resource_timing
|
|
}
|
|
|
|
fn resource_timing(&self) -> &ResourceFetchTiming {
|
|
&self.resource_timing
|
|
}
|
|
|
|
fn submit_resource_timing(&mut self) {
|
|
network_listener::submit_timing(self)
|
|
}
|
|
}
|
|
|
|
impl ResourceTimingListener for ModuleContext {
|
|
fn resource_timing_information(&self) -> (InitiatorType, ServoUrl) {
|
|
let initiator_type = InitiatorType::LocalName("module".to_string());
|
|
(initiator_type, self.url.clone())
|
|
}
|
|
|
|
fn resource_timing_global(&self) -> DomRoot<GlobalScope> {
|
|
self.owner.global()
|
|
}
|
|
}
|
|
|
|
impl PreInvoke for ModuleContext {}
|
|
|
|
#[allow(unsafe_code, non_snake_case)]
|
|
/// A function to register module hooks (e.g. listening on resolving modules,
|
|
/// getting module metadata, getting script private reference and resolving dynamic import)
|
|
pub unsafe fn EnsureModuleHooksInitialized(rt: *mut JSRuntime) {
|
|
if GetModuleResolveHook(rt).is_some() {
|
|
return;
|
|
}
|
|
|
|
SetModuleResolveHook(rt, Some(HostResolveImportedModule));
|
|
SetModuleMetadataHook(rt, Some(HostPopulateImportMeta));
|
|
SetScriptPrivateReferenceHooks(rt, None, None);
|
|
|
|
SetModuleDynamicImportHook(rt, None);
|
|
}
|
|
|
|
#[allow(unsafe_code, non_snake_case)]
|
|
/// https://tc39.github.io/ecma262/#sec-hostresolveimportedmodule
|
|
/// https://html.spec.whatwg.org/multipage/#hostresolveimportedmodule(referencingscriptormodule%2C-specifier)
|
|
unsafe extern "C" fn HostResolveImportedModule(
|
|
cx: *mut JSContext,
|
|
reference_private: RawHandleValue,
|
|
specifier: RawHandle<*mut JSString>,
|
|
) -> *mut JSObject {
|
|
let in_realm_proof = AlreadyInRealm::assert_for_cx(SafeJSContext::from_ptr(cx));
|
|
let global_scope = GlobalScope::from_context(cx, InRealm::Already(&in_realm_proof));
|
|
|
|
// Step 2.
|
|
let mut base_url = global_scope.api_base_url();
|
|
|
|
// Step 3.
|
|
let module_data = (reference_private.to_private() as *const ModuleScript).as_ref();
|
|
if let Some(data) = module_data {
|
|
base_url = data.base_url.clone();
|
|
}
|
|
|
|
// Step 5.
|
|
let url = ModuleTree::resolve_module_specifier(*global_scope.get_cx(), &base_url, specifier);
|
|
|
|
// Step 6.
|
|
assert!(url.is_ok());
|
|
|
|
let parsed_url = url.unwrap();
|
|
|
|
// Step 4 & 7.
|
|
let module_map = global_scope.get_module_map().borrow();
|
|
|
|
let module_tree = module_map.get(&parsed_url);
|
|
|
|
// Step 9.
|
|
assert!(module_tree.is_some());
|
|
|
|
let fetched_module_object = module_tree.unwrap().get_record().borrow();
|
|
|
|
// Step 8.
|
|
assert!(fetched_module_object.is_some());
|
|
|
|
// Step 10.
|
|
if let Some(record) = &*fetched_module_object {
|
|
return record.handle().get();
|
|
}
|
|
|
|
unreachable!()
|
|
}
|
|
|
|
#[allow(unsafe_code, non_snake_case)]
|
|
/// https://tc39.es/ecma262/#sec-hostgetimportmetaproperties
|
|
/// https://html.spec.whatwg.org/multipage/#hostgetimportmetaproperties
|
|
unsafe extern "C" fn HostPopulateImportMeta(
|
|
cx: *mut JSContext,
|
|
reference_private: RawHandleValue,
|
|
meta_object: RawHandle<*mut JSObject>,
|
|
) -> bool {
|
|
let in_realm_proof = AlreadyInRealm::assert_for_cx(SafeJSContext::from_ptr(cx));
|
|
let global_scope = GlobalScope::from_context(cx, InRealm::Already(&in_realm_proof));
|
|
|
|
// Step 2.
|
|
let base_url = match (reference_private.to_private() as *const ModuleScript).as_ref() {
|
|
Some(module_data) => module_data.base_url.clone(),
|
|
None => global_scope.api_base_url(),
|
|
};
|
|
|
|
rooted!(in(cx) let url_string = JS_NewStringCopyN(
|
|
cx,
|
|
base_url.as_str().as_ptr() as *const i8,
|
|
base_url.as_str().len()
|
|
));
|
|
|
|
// Step 3.
|
|
JS_DefineProperty4(
|
|
cx,
|
|
meta_object,
|
|
"url\0".as_ptr() as *const i8,
|
|
url_string.handle().into_handle(),
|
|
JSPROP_ENUMERATE.into(),
|
|
)
|
|
}
|
|
|
|
/// https://html.spec.whatwg.org/multipage/#fetch-a-module-script-tree
|
|
pub fn fetch_external_module_script(
|
|
owner: ModuleOwner,
|
|
url: ServoUrl,
|
|
destination: Destination,
|
|
integrity_metadata: String,
|
|
credentials_mode: CredentialsMode,
|
|
) {
|
|
let mut visited_urls = HashSet::new();
|
|
visited_urls.insert(url.clone());
|
|
|
|
// Step 1.
|
|
fetch_single_module_script(
|
|
owner,
|
|
url,
|
|
visited_urls,
|
|
destination,
|
|
Referrer::Client,
|
|
ParserMetadata::NotParserInserted,
|
|
integrity_metadata,
|
|
credentials_mode,
|
|
None,
|
|
true,
|
|
);
|
|
}
|
|
|
|
/// https://html.spec.whatwg.org/multipage/#fetch-a-single-module-script
|
|
pub fn fetch_single_module_script(
|
|
owner: ModuleOwner,
|
|
url: ServoUrl,
|
|
visited_urls: HashSet<ServoUrl>,
|
|
destination: Destination,
|
|
referrer: Referrer,
|
|
parser_metadata: ParserMetadata,
|
|
integrity_metadata: String,
|
|
credentials_mode: CredentialsMode,
|
|
parent_identity: Option<ModuleIdentity>,
|
|
top_level_module_fetch: bool,
|
|
) {
|
|
{
|
|
// Step 1.
|
|
let global = owner.global();
|
|
let module_map = global.get_module_map().borrow();
|
|
|
|
debug!("Start to fetch {}", url);
|
|
|
|
if let Some(module_tree) = module_map.get(&url.clone()) {
|
|
let status = module_tree.get_status();
|
|
|
|
debug!("Meet a fetched url {} and its status is {:?}", url, status);
|
|
|
|
if top_level_module_fetch {
|
|
module_tree.append_handler(owner.clone(), ModuleIdentity::ModuleUrl(url.clone()));
|
|
}
|
|
|
|
if let Some(parent_identity) = parent_identity {
|
|
module_tree.insert_parent_identity(parent_identity);
|
|
}
|
|
|
|
match status {
|
|
ModuleStatus::Initial => unreachable!(
|
|
"We have the module in module map so its status should not be `initial`"
|
|
),
|
|
// Step 2.
|
|
ModuleStatus::Fetching => {},
|
|
// Step 3.
|
|
ModuleStatus::FetchingDescendants | ModuleStatus::Finished => {
|
|
module_tree.advance_finished_and_link(&global);
|
|
},
|
|
}
|
|
|
|
return;
|
|
}
|
|
}
|
|
|
|
let global = owner.global();
|
|
let is_external = true;
|
|
let module_tree = ModuleTree::new(url.clone(), is_external, visited_urls);
|
|
module_tree.set_status(ModuleStatus::Fetching);
|
|
|
|
if top_level_module_fetch {
|
|
module_tree.append_handler(owner.clone(), ModuleIdentity::ModuleUrl(url.clone()));
|
|
}
|
|
|
|
if let Some(parent_identity) = parent_identity {
|
|
module_tree.insert_parent_identity(parent_identity);
|
|
}
|
|
|
|
module_tree.insert_incomplete_fetch_url(url.clone());
|
|
|
|
// Step 4.
|
|
global.set_module_map(url.clone(), module_tree);
|
|
|
|
// Step 5-6.
|
|
let mode = match destination.clone() {
|
|
Destination::Worker | Destination::SharedWorker if top_level_module_fetch => {
|
|
RequestMode::SameOrigin
|
|
},
|
|
_ => RequestMode::CorsMode,
|
|
};
|
|
|
|
let document: Option<DomRoot<Document>> = match &owner {
|
|
ModuleOwner::Worker(_) => None,
|
|
ModuleOwner::Window(script) => Some(document_from_node(&*script.root())),
|
|
};
|
|
|
|
// Step 7-8.
|
|
let request = RequestBuilder::new(url.clone())
|
|
.destination(destination.clone())
|
|
.origin(global.origin().immutable().clone())
|
|
.referrer(Some(referrer))
|
|
.parser_metadata(parser_metadata)
|
|
.integrity_metadata(integrity_metadata.clone())
|
|
.credentials_mode(credentials_mode)
|
|
.mode(mode);
|
|
|
|
let context = Arc::new(Mutex::new(ModuleContext {
|
|
owner,
|
|
data: vec![],
|
|
metadata: None,
|
|
url: url.clone(),
|
|
destination: destination.clone(),
|
|
credentials_mode: credentials_mode.clone(),
|
|
status: Ok(()),
|
|
resource_timing: ResourceFetchTiming::new(ResourceTimingType::Resource),
|
|
}));
|
|
|
|
let (action_sender, action_receiver) = ipc::channel().unwrap();
|
|
let task_source = global.networking_task_source();
|
|
let canceller = global.task_canceller(TaskSourceName::Networking);
|
|
|
|
let listener = NetworkListener {
|
|
context,
|
|
task_source,
|
|
canceller: Some(canceller),
|
|
};
|
|
|
|
ROUTER.add_route(
|
|
action_receiver.to_opaque(),
|
|
Box::new(move |message| {
|
|
listener.notify_fetch(message.to().unwrap());
|
|
}),
|
|
);
|
|
|
|
if let Some(doc) = document {
|
|
doc.fetch_async(LoadType::Script(url), request, action_sender);
|
|
}
|
|
}
|
|
|
|
#[allow(unsafe_code)]
|
|
/// https://html.spec.whatwg.org/multipage/#fetch-an-inline-module-script-graph
|
|
pub fn fetch_inline_module_script(
|
|
owner: ModuleOwner,
|
|
module_script_text: DOMString,
|
|
url: ServoUrl,
|
|
script_id: ScriptId,
|
|
credentials_mode: CredentialsMode,
|
|
) {
|
|
let global = owner.global();
|
|
let is_external = false;
|
|
let module_tree = ModuleTree::new(url.clone(), is_external, HashSet::new());
|
|
|
|
let compiled_module =
|
|
module_tree.compile_module_script(&global, module_script_text, url.clone());
|
|
|
|
match compiled_module {
|
|
Ok(record) => {
|
|
module_tree.append_handler(owner.clone(), ModuleIdentity::ScriptId(script_id.clone()));
|
|
module_tree.set_record(record);
|
|
|
|
// We need to set `module_tree` into inline module map in case
|
|
// of that the module descendants finished right after the
|
|
// fetch module descendants step.
|
|
global.set_inline_module_map(script_id, module_tree);
|
|
|
|
// Due to needed to set `module_tree` to inline module_map first,
|
|
// we will need to retrieve it again so that we can do the fetch
|
|
// module descendants step.
|
|
let inline_module_map = global.get_inline_module_map().borrow();
|
|
let module_tree = inline_module_map.get(&script_id).unwrap().clone();
|
|
|
|
module_tree.fetch_module_descendants(
|
|
&owner,
|
|
Destination::Script,
|
|
credentials_mode,
|
|
ModuleIdentity::ScriptId(script_id),
|
|
);
|
|
},
|
|
Err(exception) => {
|
|
module_tree.set_rethrow_error(exception);
|
|
module_tree.set_status(ModuleStatus::Finished);
|
|
global.set_inline_module_map(script_id.clone(), module_tree);
|
|
owner.notify_owner_to_finish(ModuleIdentity::ScriptId(script_id));
|
|
},
|
|
}
|
|
}
|