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d73084cf19
The last actual Firefox user of this less-safe feature was removed in 2022. Thunderbird's sync server still needs it, but apparently that is a prototype that isn't really working, so they said it was okay to remove this. Original Revision: https://phabricator.services.mozilla.com/D220646 Differential Revision: https://phabricator.services.mozilla.com/D232089
92 lines
2.9 KiB
JavaScript
92 lines
2.9 KiB
JavaScript
/* -*- indent-tabs-mode: nil; js-indent-level: 2 -*- */
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/* 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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import { ContentDOMReference } from "resource://gre/modules/ContentDOMReference.sys.mjs";
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export class WebChannelChild extends JSWindowActorChild {
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handleEvent(event) {
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if (event.type === "WebChannelMessageToChrome") {
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return this._onMessageToChrome(event);
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}
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return undefined;
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}
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receiveMessage(msg) {
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if (msg.name === "WebChannelMessageToContent") {
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return this._onMessageToContent(msg);
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}
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return undefined;
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}
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_onMessageToChrome(e) {
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// If target is window then we want the document principal, otherwise fallback to target itself.
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let principal = e.target.nodePrincipal
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? e.target.nodePrincipal
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: e.target.document.nodePrincipal;
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if (e.detail) {
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if (typeof e.detail != "string") {
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console.error("WebChannelMessageToChrome must only send strings");
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return;
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}
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let eventTarget =
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e.target instanceof Ci.nsIDOMWindow
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? null
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: ContentDOMReference.get(e.target);
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this.sendAsyncMessage("WebChannelMessageToChrome", {
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contentData: e.detail,
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eventTarget,
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principal,
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});
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} else {
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console.error("WebChannel message failed. No message detail.");
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}
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}
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_onMessageToContent(msg) {
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if (msg.data && this.contentWindow) {
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// msg.objects.eventTarget will be defined if sending a response to
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// a WebChannelMessageToChrome event. An unsolicited send
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// may not have an eventTarget defined, in this case send to the
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// main content window.
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let { eventTarget, principal } = msg.data;
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if (!eventTarget) {
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eventTarget = this.contentWindow;
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} else {
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eventTarget = ContentDOMReference.resolve(eventTarget);
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}
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if (!eventTarget) {
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console.error("WebChannel message failed. No target.");
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return;
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}
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// Use nodePrincipal if available, otherwise fallback to document principal.
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let targetPrincipal =
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eventTarget instanceof Ci.nsIDOMWindow
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? eventTarget.document.nodePrincipal
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: eventTarget.nodePrincipal;
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if (principal.subsumes(targetPrincipal)) {
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let targetWindow = this.contentWindow;
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eventTarget.dispatchEvent(
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new targetWindow.CustomEvent("WebChannelMessageToContent", {
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detail: Cu.cloneInto(
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{
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id: msg.data.id,
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message: msg.data.message,
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},
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targetWindow
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),
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})
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);
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} else {
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console.error("WebChannel message failed. Principal mismatch.");
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}
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} else {
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console.error("WebChannel message failed. No message data.");
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}
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}
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}
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