--- /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.Activity;
+import android.os.AsyncTask;
+import android.webkit.CookieManager;
+
+import com.google.android.material.snackbar.Snackbar;
+import com.stoutner.privacybrowser.R;
+import com.stoutner.privacybrowser.views.NoSwipeViewPager;
+
+import java.io.BufferedInputStream;
+import java.io.File;
+import java.io.FileOutputStream;
+import java.io.IOException;
+import java.io.InputStream;
+import java.io.OutputStream;
+import java.lang.ref.WeakReference;
+import java.net.HttpURLConnection;
+import java.net.URL;
+
+public class SaveUrl extends AsyncTask<String, Void, String> {
+ // Define a weak reference to the calling activity.
+ private WeakReference<Activity> activityWeakReference;
+
+ // Define a success string constant.
+ private final String SUCCESS = "Success";
+
+ // Define the class variables.
+ private String filePathString;
+ private String userAgent;
+ private boolean cookiesEnabled;
+ private Snackbar savingFileSnackbar;
+
+ // The public constructor.
+ public SaveUrl(Activity activity, String filePathString, String userAgent, boolean cookiesEnabled) {
+ // Populate the weak reference to the calling activity.
+ activityWeakReference = new WeakReference<>(activity);
+
+ // Store the class variables.
+ this.filePathString = filePathString;
+ this.userAgent = userAgent;
+ this.cookiesEnabled = cookiesEnabled;
+ }
+
+ // `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, R.string.saving_file, Snackbar.LENGTH_INDEFINITE);
+
+ // Display the saving file snackbar.
+ savingFileSnackbar.show();
+ }
+
+ @Override
+ protected String doInBackground(String... urlToSave) {
+ // Get a handle for the activity.
+ 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;
+
+ // Because everything relating to requesting data from a webserver can throw errors, the entire section must catch `IOExceptions`.
+ try {
+ // Get the URL from the main activity.
+ URL url = new URL(urlToSave[0]);
+
+ // Open a connection to the URL. No data is actually sent at this point.
+ HttpURLConnection httpUrlConnection = (HttpURLConnection) url.openConnection();
+
+ // 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 response code, which causes the connection to the server to be made.
+ httpUrlConnection.getResponseCode();
+
+ // Get the response body stream.
+ InputStream inputStream = new BufferedInputStream(httpUrlConnection.getInputStream());
+
+ // Get the file.
+ File file = new File(filePathString);
+
+ // Delete the file if it exists.
+ if (file.exists()) {
+ //noinspection ResultOfMethodCallIgnored
+ file.delete();
+ }
+
+ // Create a new file.
+ //noinspection ResultOfMethodCallIgnored
+ file.createNewFile();
+
+ // Create an output file stream.
+ OutputStream outputStream = new FileOutputStream(file);
+
+ // Initialize the conversion buffer byte array.
+ byte[] conversionBufferByteArray = new byte[1024];
+
+ // 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 output stream.
+ outputStream.write(conversionBufferByteArray, 0, bufferLength);
+ }
+
+ // Close the input stream.
+ inputStream.close();
+
+ // Close the output stream.
+ outputStream.close();
+ } finally {
+ // Disconnect the HTTP URL connection.
+ httpUrlConnection.disconnect();
+ }
+ } catch (IOException exception) {
+ // Store the error in the save disposition string.
+ saveDisposition = exception.toString();
+ }
+
+ // Return the save disposition string.
+ return saveDisposition;
+ }
+
+ // `onPostExecute()` operates on the UI thread.
+ @Override
+ protected void onPostExecute(String saveDisposition) {
+ // 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);
+
+ // Dismiss the saving file snackbar.
+ savingFileSnackbar.dismiss();
+
+ // Display a save disposition snackbar.
+ if (saveDisposition.equals(SUCCESS)) {
+ Snackbar.make(noSwipeViewPager, R.string.file_saved, Snackbar.LENGTH_SHORT).show();
+ } else {
+ Snackbar.make(noSwipeViewPager, activity.getString(R.string.error_saving_file) + " " + saveDisposition, Snackbar.LENGTH_INDEFINITE).show();
+ }
+ }
+}
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projects / PrivacyBrowserAndroid.git / blobdiff