+++ /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.content.Context;
-import android.os.AsyncTask;
-import android.webkit.CookieManager;
-import android.widget.TextView;
-
-import androidx.appcompat.app.AlertDialog;
-
-import com.stoutner.privacybrowser.R;
-import com.stoutner.privacybrowser.helpers.ProxyHelper;
-
-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 weak references for the calling context and alert dialog.
- 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 for the context and alert dialog.
- 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 must catch exceptions.
- 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) {
- // Get 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. This initiates a network connection.
- 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.invalid_url);
- } else { // The response code is not an error message.
- // Get the content length header.
- String contentLengthString = httpUrlConnection.getHeaderField("Content-Length");
-
- // Only process the content length string if it isn't null.
- if (contentLengthString != null) {
- // Convert the content length string to a long.
- 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 (Exception exception) {
- // Set the formatted file size to indicate a bad URL.
- formattedFileSize = context.getString(R.string.invalid_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 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);
-
- // Remove the incorrect warning below that the file size text view might be null.
- assert fileSizeTextView != null;
-
- // Update the file size.
- fileSizeTextView.setText(fileSize);
- }
-}
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projects / PrivacyBrowserAndroid.git / blobdiff