--- /dev/null
+/*
+ * Copyright © 2020 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.AlertDialog;
+import android.content.Context;
+import android.os.AsyncTask;
+import android.webkit.CookieManager;
+import android.widget.TextView;
+
+import com.stoutner.privacybrowser.R;
+import com.stoutner.privacybrowser.helpers.ProxyHelper;
+
+import java.io.IOException;
+import java.lang.ref.WeakReference;
+import java.net.HttpURLConnection;
+import java.net.Proxy;
+import java.net.URL;
+import java.text.NumberFormat;
+
+public class GetUrlSize extends AsyncTask<String, Void, String> {
+ // Define a weak reference for the calling context and fragment.
+ private WeakReference<Context> contextWeakReference;
+ private WeakReference<AlertDialog> alertDialogWeakReference;
+
+ // Define the class variables.
+ private String userAgent;
+ private boolean cookiesEnabled;
+
+ // The public constructor.
+ public GetUrlSize(Context context, AlertDialog alertDialog, String userAgent, boolean cookiesEnabled) {
+ // Populate the week references to the calling activity and fragment.
+ contextWeakReference = new WeakReference<>(context);
+ alertDialogWeakReference = new WeakReference<>(alertDialog);
+
+ // Store the class variables.
+ this.userAgent = userAgent;
+ this.cookiesEnabled = cookiesEnabled;
+ }
+
+ @Override
+ protected String doInBackground(String... urlToSave) {
+ // Get a handle for the context and the fragment.
+ Context context = contextWeakReference.get();
+ AlertDialog alertDialog = alertDialogWeakReference.get();
+
+ // Abort if the fragment is gone.
+ if (alertDialog == null) {
+ return null;
+ }
+
+ // Initialize the formatted file size string.
+ String formattedFileSize = context.getString(R.string.unknown_size);
+
+ // Because everything relating to requesting data from a webserver can throw errors, the entire section much catch `IOExceptions`.
+ try {
+ // Get the URL from the calling fragment.
+ URL url = new URL(urlToSave[0]);
+
+ // Instantiate the proxy helper.
+ ProxyHelper proxyHelper = new ProxyHelper();
+
+ // Get the current proxy.
+ Proxy proxy = proxyHelper.getCurrentProxy(context);
+
+ // Open a connection to the URL. No data is actually sent at this point.
+ HttpURLConnection httpURLConnection = (HttpURLConnection) url.openConnection(proxy);
+
+ // Add the user agent to the header property.
+ httpURLConnection.setRequestProperty("User-Agent", userAgent);
+
+ // Add the cookies if they are enabled.
+ if (cookiesEnabled) {
+ // Ge the cookies for the current domain.
+ String cookiesString = CookieManager.getInstance().getCookie(url.toString());
+
+ // Only add the cookies if they are not null.
+ if (cookiesString != null) {
+ // Add the cookies to the header property.
+ httpURLConnection.setRequestProperty("Cookie", cookiesString);
+ }
+ }
+
+ // The actual network request is in a `try` bracket so that `disconnect()` is run in the `finally` section even if an error is encountered in the main block.
+ try {
+ // Exit if the task has been cancelled.
+ if (isCancelled()) {
+ // Disconnect the HTTP URL connection.
+ httpURLConnection.disconnect();
+
+ // Return the formatted file size string.
+ return formattedFileSize;
+ }
+
+ // Get the status code.
+ int responseCode = httpURLConnection.getResponseCode();
+
+ // Exit if the task has been cancelled.
+ if (isCancelled()) {
+ // Disconnect the HTTP URL connection.
+ httpURLConnection.disconnect();
+
+ // Return the formatted file size string.
+ return formattedFileSize;
+ }
+
+ // Check the response code.
+ if (responseCode >= 400) { // The response code is an error message.
+ // Set the formatted file size to indicate a bad URL.
+ formattedFileSize = context.getString(R.string.bad_url);
+ } else { // The response code is not an error message.
+ // Get the content length header.
+ String contentLengthString = httpURLConnection.getHeaderField("Content-Length");
+
+ // Define the file size long.
+ long fileSize;
+
+ // Make sure the content length isn't null.
+ if (contentLengthString != null) { // The content length isn't null.
+ // Convert the content length to a long.
+ fileSize = Long.parseLong(contentLengthString);
+
+ // Format the file size.
+ formattedFileSize = NumberFormat.getInstance().format(fileSize) + " " + context.getString(R.string.bytes);
+ }
+ }
+ } finally {
+ // Disconnect the HTTP URL connection.
+ httpURLConnection.disconnect();
+ }
+ } catch (IOException exception) {
+ // Set the formatted file size to indicate a bad URL.
+ formattedFileSize = context.getString(R.string.bad_url);
+ }
+
+ // Return the formatted file size string.
+ return formattedFileSize;
+ }
+
+ // `onPostExecute()` operates on the UI thread.
+ @Override
+ protected void onPostExecute(String fileSize) {
+ // Get a handle for the context and alert dialog.
+ AlertDialog alertDialog = alertDialogWeakReference.get();
+
+ // Abort if the alert dialog is gone.
+ if (alertDialog == null) {
+ return;
+ }
+
+ // Get a handle for the file size text view.
+ TextView fileSizeTextView = alertDialog.findViewById(R.id.file_size_textview);
+
+ // Update the file size.
+ fileSizeTextView.setText(fileSize);
+ }
+}
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projects / PrivacyBrowserAndroid.git / blobdiff