Preloading support in browser
Apps like the QSB can request the browser to preload a
web page.
- preloaded pages are not added to the browser history
if they'r not seen by the user
- when a request is received, a new tab is created for the
preloaded page, but not added to the tab list
- upon receiving the view intent for the preloaded page
the tab is added to the tab list, and shown
- if several pages are preloaded consecutively in the same tab,
the back stack is cleared before it is displayed
- preloaded pages use the main browser cookie jar, so pages that
have never been viewed by the user can drop cookies
Change-Id: I9ed21f2c9560fda0ed042b460b73bb33988a2e8a
diff --git a/src/com/android/browser/PreloadRequestReceiver.java b/src/com/android/browser/PreloadRequestReceiver.java
new file mode 100644
index 0000000..c86d660
--- /dev/null
+++ b/src/com/android/browser/PreloadRequestReceiver.java
@@ -0,0 +1,82 @@
+/*
+ * Copyright (C) 2011 The Android Open Source Project
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ * http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+package com.android.browser;
+
+import android.content.BroadcastReceiver;
+import android.content.Context;
+import android.content.Intent;
+import android.content.SharedPreferences;
+import android.os.Bundle;
+import android.preference.PreferenceManager;
+import android.provider.Browser;
+import android.util.Log;
+
+import java.util.HashMap;
+import java.util.Iterator;
+import java.util.Map;
+
+/**
+ * Broadcast receiver for receiving browser preload requests
+ */
+public class PreloadRequestReceiver extends BroadcastReceiver {
+
+ private final static String LOGTAG = "browser.preloader";
+ private final static boolean LOGD_ENABLED = com.android.browser.Browser.LOGD_ENABLED;
+
+ private static final String ACTION_PRELOAD = "android.intent.action.PRELOAD";
+ static final String EXTRA_PRELOAD_ID = "preload_id";
+ static final String EXTRA_PRELOAD_DISCARD = "preload_discard";
+
+ @Override
+ public void onReceive(Context context, Intent intent) {
+ if (LOGD_ENABLED) Log.d(LOGTAG, "received intent " + intent);
+ if (BrowserSettings.getInstance().isPreloadEnabled()
+ && intent.getAction().equals(ACTION_PRELOAD)) {
+ handlePreload(context, intent);
+ }
+ }
+
+ private void handlePreload(Context context, Intent i) {
+ String url = UrlUtils.smartUrlFilter(i.getData());
+ String id = i.getStringExtra(EXTRA_PRELOAD_ID);
+ Map<String, String> headers = null;
+ if (id == null) {
+ if (LOGD_ENABLED) Log.d(LOGTAG, "Preload request has no " + EXTRA_PRELOAD_ID);
+ return;
+ }
+ if (i.getBooleanExtra(EXTRA_PRELOAD_DISCARD, false)) {
+ if (LOGD_ENABLED) Log.d(LOGTAG, "Got " + id + " preload discard request");
+ Preloader.getInstance().discardPreload(id);
+ } else {
+ if (LOGD_ENABLED) Log.d(LOGTAG, "Got " + id + " preload request for " + url);
+ if (url != null && url.startsWith("http")) {
+ final Bundle pairs = i.getBundleExtra(Browser.EXTRA_HEADERS);
+ if (pairs != null && !pairs.isEmpty()) {
+ Iterator<String> iter = pairs.keySet().iterator();
+ headers = new HashMap<String, String>();
+ while (iter.hasNext()) {
+ String key = iter.next();
+ headers.put(key, pairs.getString(key));
+ }
+ }
+ }
+ if (url != null) {
+ Preloader.getInstance().handlePreloadRequest(id, url, headers);
+ }
+ }
+ }
+
+}