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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/. */
import { RemoteSettings } from "resource://services-settings/remote-settings.sys.mjs";
const FileUtils = ChromeUtils.importESModule(
"resource://gre/modules/FileUtils.sys.mjs"
).FileUtils;
const RECORD_ID = "tld-dafsa";
const SIGNAL = "public-suffix-list-updated";
export const PublicSuffixList = {
CLIENT: RemoteSettings("public-suffix-list"),
init() {
// Only initialize once.
if (this._initialized) {
return;
}
this._initialized = true;
this.CLIENT.on("sync", this.onUpdate.bind(this));
/* We have a single record for this collection. Let's see if we already have it locally.
* Note that on startup, we don't need to synchronize immediately on new profiles.
*/
this.CLIENT.get({ syncIfEmpty: false, filters: { id: RECORD_ID } })
.then(async records => {
if (records.length == 1) {
// Get the downloaded file URI (most likely to be a no-op here, since file will exist).
const fileURI = await this.CLIENT.attachments.downloadToDisk(
records[0]
);
// Send a signal so that the C++ code loads the updated list on startup.
this.notifyUpdate(fileURI);
}
})
.catch(err => console.error(err));
},
/**
* This method returns the path to the file based on the file uri received
* Example:
* On windows "file://C:/Users/AppData/main/public-suffix-list/dafsa.bin"
* will be converted to "C:\\Users\\main\\public-suffix-list\\dafsa.bin
*
* On macOS/linux "file:///home/main/public-suffix-list/dafsa.bin"
* will be converted to "/home/main/public-suffix-list/dafsa.bin"
*/
getFilePath(fileURI) {
const uri = Services.io.newURI(fileURI);
const file = uri.QueryInterface(Ci.nsIFileURL).file;
return file.path;
},
notifyUpdate(fileURI) {
if (!Services.prefs.getBoolPref("network.psl.onUpdate_notify", false)) {
// Updating the PSL while Firefox is running could cause principals to
// have a different base domain before/after the update.
// See bug 1582647 comment 30
return;
}
const filePath = this.getFilePath(fileURI);
const nsifile = new FileUtils.File(filePath);
/* Send a signal to be read by the C++, the method
* ::Observe(nsISupports* aSubject, const char* aTopic, const char16_t* aData)
* at netwerk/dns/nsEffectiveTLDService.cpp
*/
Services.obs.notifyObservers(
nsifile, // aSubject
SIGNAL, // aTopic
filePath // aData
);
},
async onUpdate({ data: { created, updated, deleted } }) {
// In theory, this will never happen, we will never delete the record.
if (deleted.length == 1) {
await this.CLIENT.attachments.deleteFromDisk(deleted[0]);
}
// Handle creation and update the same way
const changed = created.concat(updated.map(u => u.new));
/* In theory, we should never have more than one record. And if we receive
* this event, it's because the single record was updated.
*/
if (changed.length != 1) {
console.warn("Unsupported sync event for Public Suffix List");
return;
}
// Download the updated file.
let fileURI;
try {
fileURI = await this.CLIENT.attachments.downloadToDisk(changed[0]);
} catch (err) {
console.error(err);
return;
}
// Notify the C++ part to reload it from disk.
this.notifyUpdate(fileURI);
},
};
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