+++ /dev/null
-/*
- * Copyright 2020-2022 Soren Stoutner <soren@stoutner.com>.
- *
- * This file is part of Privacy Browser Android <https://www.stoutner.com/privacy-browser-android>.
- *
- * Privacy Browser Android 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 Android 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 Android. If not, see <http://www.gnu.org/licenses/>.
- */
-
-package com.stoutner.privacybrowser.asynctasks;
-
-import android.app.Activity;
-import android.content.Context;
-import android.database.Cursor;
-import android.net.Uri;
-import android.os.AsyncTask;
-import android.os.Build;
-import android.provider.OpenableColumns;
-import android.util.Base64;
-import android.webkit.CookieManager;
-
-import com.google.android.material.snackbar.Snackbar;
-import com.stoutner.privacybrowser.R;
-import com.stoutner.privacybrowser.helpers.ProxyHelper;
-import com.stoutner.privacybrowser.views.NoSwipeViewPager;
-
-import java.io.BufferedInputStream;
-import java.io.InputStream;
-import java.io.OutputStream;
-import java.lang.ref.WeakReference;
-import java.net.HttpURLConnection;
-import java.net.Proxy;
-import java.net.URL;
-import java.text.NumberFormat;
-
-public class SaveUrl extends AsyncTask<String, Long, String> {
- // Declare the weak references.
- private final WeakReference<Context> contextWeakReference;
- private final WeakReference<Activity> activityWeakReference;
-
- // Define a success string constant.
- private final String SUCCESS = "Success";
-
- // Declare the class variables.
- private final Uri fileUri;
- private final String userAgent;
- private final boolean cookiesEnabled;
- private Snackbar savingFileSnackbar;
- private long fileSize;
- private String formattedFileSize;
- private final String fileNameString;
-
- // The public constructor.
- public SaveUrl(Context context, Activity activity, Uri fileUri, String userAgent, boolean cookiesEnabled) {
- // Populate weak references to the calling context and activity.
- contextWeakReference = new WeakReference<>(context);
- activityWeakReference = new WeakReference<>(activity);
-
- // Store the class variables.
- this.fileUri = fileUri;
- this.userAgent = userAgent;
- this.cookiesEnabled = cookiesEnabled;
-
- // Query the exact file name if the API >= 26.
- if (Build.VERSION.SDK_INT >= 26) {
- // Get a cursor from the content resolver.
- Cursor contentResolverCursor = activity.getContentResolver().query(fileUri, null, null, null);
-
- // Move to the first row.
- contentResolverCursor.moveToFirst();
-
- // Get the file name from the cursor.
- fileNameString = contentResolverCursor.getString(contentResolverCursor.getColumnIndexOrThrow(OpenableColumns.DISPLAY_NAME));
-
- // Close the cursor.
- contentResolverCursor.close();
- } else {
- // Use the file URI last path segment as the file name string.
- fileNameString = fileUri.getLastPathSegment();
- }
- }
-
- // `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;
- }
-
- // Get a handle for the no swipe view pager.
- NoSwipeViewPager noSwipeViewPager = activity.findViewById(R.id.webviewpager);
-
- // Create a saving file snackbar.
- savingFileSnackbar = Snackbar.make(noSwipeViewPager, activity.getString(R.string.saving_file) + " 0% - " + fileNameString, Snackbar.LENGTH_INDEFINITE);
-
- // Display the saving file snackbar.
- savingFileSnackbar.show();
- }
-
- @Override
- protected String doInBackground(String... urlToSave) {
- // Get handles for the context and activity.
- Context context = contextWeakReference.get();
- Activity activity = activityWeakReference.get();
-
- // Abort if the activity is gone.
- if ((activity == null) || activity.isFinishing()) {
- return null;
- }
-
- // Define a save disposition string.
- String saveDisposition = SUCCESS;
-
- // Get the URL string.
- String urlString = urlToSave[0];
-
- try {
- // Open an output stream.
- OutputStream outputStream = activity.getContentResolver().openOutputStream(fileUri);
-
- // Save the URL.
- if (urlString.startsWith("data:")) { // The URL contains the entire data of an image.
- // Get the Base64 data, which begins after a `,`.
- String base64DataString = urlString.substring(urlString.indexOf(",") + 1);
-
- // Decode the Base64 string to a byte array.
- byte[] base64DecodedDataByteArray = Base64.decode(base64DataString, Base64.DEFAULT);
-
- // Write the Base64 byte array to the output stream.
- outputStream.write(base64DecodedDataByteArray);
- } else { // The URL points to the data location on the internet.
- // Get the URL from the calling activity.
- URL url = new URL(urlString);
-
- // 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 {
- // Get the content length header, which causes the connection to the server to be made.
- String contentLengthString = httpUrlConnection.getHeaderField("Content-Length");
-
- // Make sure the content length isn't null.
- if (contentLengthString != null) { // The content length isn't null.
- // Convert the content length to an long.
- fileSize = Long.parseLong(contentLengthString);
-
- // Format the file size for display.
- formattedFileSize = NumberFormat.getInstance().format(fileSize);
- } else { // The content length is null.
- // Set the file size to be `-1`.
- fileSize = -1;
- }
-
- // Get the response body stream.
- InputStream inputStream = new BufferedInputStream(httpUrlConnection.getInputStream());
-
- // Initialize the conversion buffer byte array.
- // This is set to a megabyte so that frequent updating of the snackbar doesn't freeze the interface on download. <https://redmine.stoutner.com/issues/709>
- byte[] conversionBufferByteArray = new byte[1048576];
-
- // Initialize the downloaded kilobytes counter.
- long downloadedKilobytesCounter = 0;
-
- // Define the buffer length variable.
- int bufferLength;
-
- // Attempt to read data from the input stream and store it in the output stream. Also store the amount of data read in the buffer length variable.
- while ((bufferLength = inputStream.read(conversionBufferByteArray)) > 0) { // Proceed while the amount of data stored in the buffer in > 0.
- // Write the contents of the conversion buffer to the file output stream.
- outputStream.write(conversionBufferByteArray, 0, bufferLength);
-
- // Update the downloaded kilobytes counter.
- downloadedKilobytesCounter = downloadedKilobytesCounter + bufferLength;
-
- // Update the file download progress snackbar.
- publishProgress(downloadedKilobytesCounter);
- }
-
- // Close the input stream.
- inputStream.close();
- } finally {
- // Disconnect the HTTP URL connection.
- httpUrlConnection.disconnect();
- }
- }
-
- // Close the output stream.
- outputStream.close();
- } catch (Exception exception) {
- // Store the error in the save disposition string.
- saveDisposition = exception.toString();
- }
-
- // Return the save disposition string.
- return saveDisposition;
- }
-
- // `onProgressUpdate()` operates on the UI thread.
- @Override
- protected void onProgressUpdate(Long... numberOfBytesDownloaded) {
- // Get a handle for the activity.
- Activity activity = activityWeakReference.get();
-
- // Abort if the activity is gone.
- if ((activity == null) || activity.isFinishing()) {
- return;
- }
-
- // Format the number of bytes downloaded.
- String formattedNumberOfBytesDownloaded = NumberFormat.getInstance().format(numberOfBytesDownloaded[0]);
-
- // Check to see if the file size is known.
- if (fileSize == -1) { // The size of the download file is not known.
- // Update the snackbar.
- savingFileSnackbar.setText(activity.getString(R.string.saving_file) + " " + formattedNumberOfBytesDownloaded + " " + activity.getString(R.string.bytes) + " - " + fileNameString);
- } else { // The size of the download file is known.
- // Calculate the download percentage.
- long downloadPercentage = (numberOfBytesDownloaded[0] * 100) / fileSize;
-
- // Update the snackbar.
- savingFileSnackbar.setText(activity.getString(R.string.saving_file) + " " + downloadPercentage + "% - " + formattedNumberOfBytesDownloaded + " " + activity.getString(R.string.bytes) + " / " +
- formattedFileSize + " " + activity.getString(R.string.bytes) + " - " + fileNameString);
- }
- }
-
- // `onPostExecute()` operates on the UI thread.
- @Override
- protected void onPostExecute(String saveDisposition) {
- // Get handles for the context and activity.
- Activity activity = activityWeakReference.get();
-
- // Abort if the activity is gone.
- if ((activity == null) || activity.isFinishing()) {
- return;
- }
-
- // Get a handle for the no swipe view pager.
- NoSwipeViewPager noSwipeViewPager = activity.findViewById(R.id.webviewpager);
-
- // Dismiss the saving file snackbar.
- savingFileSnackbar.dismiss();
-
- // Display a save disposition snackbar.
- if (saveDisposition.equals(SUCCESS)) {
- // Display the file saved snackbar.
- Snackbar.make(noSwipeViewPager, activity.getString(R.string.saved, fileNameString), Snackbar.LENGTH_LONG).show();
- } else {
- // Display the file saving error.
- Snackbar.make(noSwipeViewPager, activity.getString(R.string.error_saving_file, fileNameString, saveDisposition), Snackbar.LENGTH_INDEFINITE).show();
- }
- }
-}
projects / PrivacyBrowserAndroid.git / blobdiff