+/*
+ * Copyright © 2019 Soren Stoutner <soren@stoutner.com>.
+ *
+ * This file is part of Privacy Browser <https://www.stoutner.com/privacy-browser>.
+ *
+ * Privacy Browser is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation, either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * Privacy Browser is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with Privacy Browser. If not, see <http://www.gnu.org/licenses/>.
+ */
+
+package com.stoutner.privacybrowser.asynctasks;
+
+import android.app.Activity;
+import android.os.AsyncTask;
+
+import com.stoutner.privacybrowser.activities.MainWebViewActivity;
+
+import java.lang.ref.WeakReference;
+import java.net.InetAddress;
+import java.net.UnknownHostException;
+
+// This must run asynchronously because it involves a network request. `String` declares the parameters. `Void` does not declare progress units. `String` contains the results.
+public class GetHostIpAddresses extends AsyncTask<String, Void, String> {
+ // The weak references are used to determine if the activity have disappeared while the AsyncTask is running.
+ private final WeakReference<Activity> activityWeakReference;
+ private final int domainSettingsDatabaseId;
+
+ public GetHostIpAddresses(Activity activity, int domainSettingsDatabaseId) {
+ // Populate the weak activity reference.
+ activityWeakReference = new WeakReference<>(activity);
+
+ // Populate the domain settings database ID.
+ this.domainSettingsDatabaseId = domainSettingsDatabaseId;
+ }
+
+ // `onPreExecute()` operates on the UI thread.
+ @Override
+ protected void onPreExecute() {
+ // Get a handle for the activity.
+ Activity activity = activityWeakReference.get();
+
+ // Abort if the activity is gone.
+ if ((activity == null) || activity.isFinishing()) {
+ return;
+ }
+
+ // Set the getting IP addresses tracker.
+ MainWebViewActivity.gettingIpAddresses = true;
+ }
+
+
+ @Override
+ protected String doInBackground(String... domainName) {
+ // Get a handle for the activity.
+ Activity activity = activityWeakReference.get();
+
+ // Abort if the activity is gone.
+ if ((activity == null) || activity.isFinishing()) {
+ // Return an empty spannable string builder.
+ return "";
+ }
+
+ // Initialize an IP address string builder.
+ StringBuilder ipAddresses = new StringBuilder();
+
+ // Get an array with the IP addresses for the host.
+ try {
+ // Get an array with all the IP addresses for the domain.
+ InetAddress[] inetAddressesArray = InetAddress.getAllByName(domainName[0]);
+
+ // Add each IP address to the string builder.
+ for (InetAddress inetAddress : inetAddressesArray) {
+ if (ipAddresses.length() == 0) { // This is the first IP address.
+ // Add the IP address to the string builder.
+ ipAddresses.append(inetAddress.getHostAddress());
+ } else { // This is not the first IP address.
+ // Add a line break to the string builder first.
+ ipAddresses.append("\n");
+
+ // Add the IP address to the string builder.
+ ipAddresses.append(inetAddress.getHostAddress());
+ }
+ }
+ } catch (UnknownHostException exception) {
+ // Do nothing.
+ }
+
+ // Return the string.
+ return ipAddresses.toString();
+ }
+
+ // `onPostExecute()` operates on the UI thread.
+ @Override
+ protected void onPostExecute(String ipAddresses) {
+ // Get a handle for the activity.
+ Activity activity = activityWeakReference.get();
+
+ // Abort if the activity is gone.
+ if ((activity == null) || activity.isFinishing()) {
+ return;
+ }
+
+ // Store the IP addresses.
+ MainWebViewActivity.currentHostIpAddresses = ipAddresses;
+
+ if (!MainWebViewActivity.urlIsLoading) {
+ MainWebViewActivity.checkPinnedMismatch(domainSettingsDatabaseId);
+ }
+
+ // Reset the getting IP addresses tracker.
+ MainWebViewActivity.gettingIpAddresses = false;
+ }
+}
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projects / PrivacyBrowserAndroid.git / commitdiff