Only register listeners when network/cosmetics filtering is enabled

CHANGELOG.md

@@ -4,6 +4,8 @@
 
 *not released*
 
+  * only register listeners when network/cosmetics filtering is enabled [#288](https://github.com/cliqz-oss/adblocker/pull/288)
+
 ## 0.13.2
 
 *2019-08-17*

packages/adblocker-electron/adblocker.ts

@@ -46,15 +46,18 @@ export function fromElectronDetails({
  */
 export class ElectronBlocker extends FiltersEngine {
   public enableBlockingInSession(ses: Electron.Session) {
-    ses.webRequest.onHeadersReceived({ urls: ['<all_urls>'] }, this.onHeadersReceived);
-    ses.webRequest.onBeforeRequest({ urls: ['<all_urls>'] }, this.onBeforeRequest);
-
-    ipcMain.on('get-cosmetic-filters', this.onGetCosmeticFilters);
-    ses.setPreloads([join(__dirname, './preload.js')]);
+    if (this.config.loadNetworkFilters === true) {
+      ses.webRequest.onHeadersReceived({ urls: ['<all_urls>'] }, this.onHeadersReceived);
+      ses.webRequest.onBeforeRequest({ urls: ['<all_urls>'] }, this.onBeforeRequest);
+    }
 
-    ipcMain.on('is-mutation-observer-enabled', (event: Electron.IpcMainEvent) => {
-      event.returnValue = this.config.enableMutationObserver;
-    });
+    if (this.config.loadCosmeticFilters === true) {
+      ipcMain.on('get-cosmetic-filters', this.onGetCosmeticFilters);
+      ses.setPreloads([join(__dirname, './preload.js')]);
+      ipcMain.on('is-mutation-observer-enabled', (event: Electron.IpcMainEvent) => {
+        event.returnValue = this.config.enableMutationObserver;
+      });
+    }
   }
 
   private onGetCosmeticFilters = (

packages/adblocker-puppeteer/adblocker.ts

@@ -44,17 +44,21 @@ export class PuppeteerBlocker extends FiltersEngine {
       // currently no way to modify responses in puppeteer. This feature could
       // easily be added if puppeteer implements the required capability.
 
-      // Register callback for network requets filtering
-      page.on('request', this.onRequest);
-
-      // Register callback to cosmetics injection (CSS + scriptlets)
-      page.on('framenavigated', async (frame) => {
-        try {
-          await this.onFrame(frame);
-        } catch (ex) {
-          // Ignore
-        }
-      });
+      if (this.config.loadNetworkFilters === true) {
+        // Register callback for network requets filtering
+        page.on('request', this.onRequest);
+      }
+
+      if (this.config.loadCosmeticFilters === true) {
+        // Register callback to cosmetics injection (CSS + scriptlets)
+        page.on('framenavigated', async (frame) => {
+          try {
+            await this.onFrame(frame);
+          } catch (ex) {
+            // Ignore
+          }
+        });
+      }
     });
   }
 

packages/adblocker-webextension/adblocker.ts

@@ -72,17 +72,19 @@ export function updateResponseHeadersWithCSP(
  */
 export class WebExtensionBlocker extends FiltersEngine {
   public enableBlockingInBrowser() {
-    chrome.webRequest.onBeforeRequest.addListener(
-      this.onBeforeRequest,
-      { urls: ['<all_urls>'] },
-      ['blocking'],
-    );
+    if (this.config.loadNetworkFilters === true) {
+      chrome.webRequest.onBeforeRequest.addListener(
+        this.onBeforeRequest,
+        { urls: ['<all_urls>'] },
+        ['blocking'],
+      );
 
-    chrome.webRequest.onHeadersReceived.addListener(
-      this.onHeadersReceived,
-      { urls: ['<all_urls>'], types: ['main_frame'] },
-      ['blocking', 'responseHeaders'],
-    );
+      chrome.webRequest.onHeadersReceived.addListener(
+        this.onHeadersReceived,
+        { urls: ['<all_urls>'], types: ['main_frame'] },
+        ['blocking', 'responseHeaders'],
+      );
+    }
 
     // Start listening to messages coming from the content-script
     chrome.runtime.onMessage.addListener(this.onRuntimeMessage);