Commit 0a2f5583 authored by ma1's avatar ma1 Committed by Pier Angelo Vendrame
Browse files

MB 47: uBlock Origin customization

parent 04484064

toolkit/components/extensions/child/ext-storage.js

+7 −0
Original line number Diff line number Diff line
@@ -137,6 +137,8 @@ this.storage = class extends ExtensionAPI { 
      context

    );



    const isUBO = extension.id === "uBlock0@raymondhill.net";



    // onChangedName is "storage.onChanged", "storage.sync.onChanged", etc.

    function makeOnChangedEventTarget(onChangedName) {

      return new EventManager({
@@ -279,6 +281,11 @@ this.storage = class extends ExtensionAPI { 
            selectedBackend = await promiseStorageLocalBackend;

          }



          if (isUBO && args[0] === "cachedManagedStorage") {

            // prevent uBO from caching adminSettings

            return Promise.resolve({});

          }



          // Let the outer try to catch rejections returned by the backend methods.

          const result = await selectedBackend[method](...args);

          return result;

toolkit/components/extensions/parent/ext-storage.js

+77 −4
Original line number Diff line number Diff line
@@ -37,6 +37,8 @@ XPCOMUtils.defineLazyPreferenceGetter( 
  true

);



XPCOMUtils.defineLazyGlobalGetters(this, ["fetch"]);



const enforceNoTemporaryAddon = extensionId => {

  const EXCEPTION_MESSAGE =

    "The storage API will not work with a temporary addon ID. " +
@@ -254,10 +256,77 @@ this.storage = class extends ExtensionAPIPersistent { 
  getAPI(context) {

    let { extension } = context;



    const NOP = async () => {};



    let apiObject;

    const isUBO = extension.id === "uBlock0@raymondhill.net";



    let uBOMullvadBrowserSettings = isUBO

      ? async keys => {

          // First thing on startup uBO checks if some adminSettings can be

          // loaded from managed storage, and we exploit this to inject our

          // settings customization.

          // See https://github.com/gorhill/uBlock/search?q=restoreAdminSettings

          if (Array.isArray(keys) && !keys.includes("adminSettings")) {

            return;

          }



          // stop intercepting managed storage for this session

          uBOMullvadBrowserSettings = NOP;



          // deuglify our storage access API

          const storage = {};

          for (let m of ["get", "set"]) {

            storage[m] = async (...args) =>

              apiObject.storage.local.callMethodInParentProcess(m, args);

          }



          // check if settings still need to be customized

          const CURRENT_VERSION = 1;

          const VERSION_KEY = "mullvad-browser/settings-version";

          const version = (await storage.get([VERSION_KEY]))[VERSION_KEY];

          if (version === CURRENT_VERSION) {

            return;

          }



          // the filter lists we want to enable by default

          const EXTRA_FILTERS = [

            "adguard-spyware-url", // strip tracking parameters

            "fanboy-cookiemonster", // hide cookie consent popups

          ];



          // load uBO's default filter lists from the extension's package

          const assetsUrl = context.uri.resolve("assets/assets.json");

          const assets = await (await fetch(assetsUrl)).json();



          // build the default selection ensuring our filter lists are included

          const selectedFilterLists = Object.entries(assets)

            .filter(

              ([key, value]) =>

                (!value.off || EXTRA_FILTERS.includes(key)) &&

                value.content === "filters"

            )

            .map(([key]) => key);

          // we're done for this version (don't mess with user choices anymore)

          await storage.set({ [VERSION_KEY]: CURRENT_VERSION });



          // enforce our list on startup

          return {

            adminSettings: {

              selectedFilterLists,

            },

          };

        }

      : NOP;



    apiObject = {

      storage: {

        local: {

          async callMethodInParentProcess(method, args) {

            if (isUBO && args[0] === "cachedManagedStorage") {

              // prevent uBO from caching adminSettings

              return Promise.resolve({});

            }

            const res = await ExtensionStorageIDB.selectBackend({ extension });

            if (!res.backendEnabled) {

              return ExtensionStorage[method](extension.id, ...args);
@@ -391,9 +460,12 @@ this.storage = class extends ExtensionAPIPersistent { 


            let data = await lookup;

            if (!data) {

              return Promise.reject({

              return (

                (await uBOMullvadBrowserSettings(keys)) ||

                Promise.reject({

                  message: "Managed storage manifest not found",

              });

                })

              );

            }

            return ExtensionStorage._filterProperties(extension.id, data, keys);

          },
@@ -409,5 +481,6 @@ this.storage = class extends ExtensionAPIPersistent { 
        }).api(),

      },

    };

    return apiObject;

  }

};