+++ /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.net.Uri;
-import android.os.AsyncTask;
-import android.webkit.CookieManager;
-import android.webkit.MimeTypeMap;
-
-import androidx.fragment.app.DialogFragment;
-import androidx.fragment.app.FragmentManager;
-
-import com.stoutner.privacybrowser.R;
-import com.stoutner.privacybrowser.activities.MainWebViewActivity;
-import com.stoutner.privacybrowser.dataclasses.PendingDialog;
-import com.stoutner.privacybrowser.dialogs.SaveDialog;
-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 PrepareSaveDialog extends AsyncTask<String, Void, String[]> {
- // Define weak references.
- private final WeakReference<Activity> activityWeakReference;
- private final WeakReference<Context> contextWeakReference;
- private final WeakReference<FragmentManager> fragmentManagerWeakReference;
-
- // Define the class variables.
- private final String userAgent;
- private final boolean cookiesEnabled;
- private String urlString;
-
- // The public constructor.
- public PrepareSaveDialog(Activity activity, Context context, FragmentManager fragmentManager, String userAgent, boolean cookiesEnabled) {
- // Populate the weak references.
- activityWeakReference = new WeakReference<>(activity);
- contextWeakReference = new WeakReference<>(context);
- fragmentManagerWeakReference = new WeakReference<>(fragmentManager);
-
- // Store the class variables.
- this.userAgent = userAgent;
- this.cookiesEnabled = cookiesEnabled;
- }
-
- @Override
- protected String[] doInBackground(String... urlToSave) {
- // Get a handle for the activity and context.
- Activity activity = activityWeakReference.get();
- Context context = contextWeakReference.get();
-
- // Abort if the activity is gone.
- if (activity == null || activity.isFinishing()) {
- // Return a null string array.
- return null;
- }
-
- // Get the URL string.
- urlString = urlToSave[0];
-
- // Define the strings.
- String formattedFileSize;
- String fileNameString;
-
- // Populate the file size and name strings.
- if (urlString.startsWith("data:")) { // The URL contains the entire data of an image.
- // Remove `data:` from the beginning of the URL.
- String urlWithoutData = urlString.substring(5);
-
- // Get the URL MIME type, which ends with a `;`.
- String urlMimeType = urlWithoutData.substring(0, urlWithoutData.indexOf(";"));
-
- // Get the Base64 data, which begins after a `,`.
- String base64DataString = urlWithoutData.substring(urlWithoutData.indexOf(",") + 1);
-
- // Calculate the file size of the data URL. Each Base64 character represents 6 bits.
- formattedFileSize = NumberFormat.getInstance().format(base64DataString.length() * 3L / 4) + " " + context.getString(R.string.bytes);
-
- // Set the file name according to the MIME type.
- fileNameString = context.getString(R.string.file) + "." + MimeTypeMap.getSingleton().getExtensionFromMimeType(urlMimeType);
- } else { // The URL refers to the location of the data.
- // Initialize the formatted file size 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 {
- // Convert the URL string to a URL.
- 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 status code. This initiates a network connection.
- int responseCode = httpUrlConnection.getResponseCode();
-
- // 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);
-
- // Set the file name according to the URL.
- fileNameString = getFileNameFromUrl(context, urlString, null);
- } else { // The response code is not an error message.
- // Get the headers.
- String contentLengthString = httpUrlConnection.getHeaderField("Content-Length");
- String contentDispositionString = httpUrlConnection.getHeaderField("Content-Disposition");
- String contentTypeString = httpUrlConnection.getContentType();
-
- // Remove anything after the MIME type in the content type string.
- if (contentTypeString.contains(";")) {
- // Remove everything beginning with the `;`.
- contentTypeString = contentTypeString.substring(0, contentTypeString.indexOf(";"));
- }
-
- // 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);
- }
-
- // Get the file name string from the content disposition.
- fileNameString = getFileNameFromHeaders(context, contentDispositionString, contentTypeString, urlString);
- }
- } 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);
-
- // Set the file name according to the URL.
- fileNameString = getFileNameFromUrl(context, urlString, null);
- }
- }
-
- // Return the formatted file size and name as a string array.
- return new String[] {formattedFileSize, fileNameString};
- }
-
- // `onPostExecute()` operates on the UI thread.
- @Override
- protected void onPostExecute(String[] fileStringArray) {
- // Get a handle for the activity and the fragment manager.
- Activity activity = activityWeakReference.get();
- FragmentManager fragmentManager = fragmentManagerWeakReference.get();
-
- // Abort if the activity is gone.
- if (activity == null || activity.isFinishing()) {
- // Exit.
- return;
- }
-
- // Instantiate the save dialog.
- DialogFragment saveDialogFragment = SaveDialog.saveUrl(urlString, fileStringArray[0], fileStringArray[1], userAgent, cookiesEnabled);
-
- // Try to show the dialog. Sometimes the window is not active.
- try {
- // Show the save dialog. It must be named `save_dialog` so that the file picker can update the file name.
- saveDialogFragment.show(fragmentManager, activity.getString(R.string.save_dialog));
- } catch (Exception exception) {
- // Add the dialog to the pending dialog array list. It will be displayed in `onStart()`.
- MainWebViewActivity.pendingDialogsArrayList.add(new PendingDialog(saveDialogFragment, activity.getString(R.string.save_dialog)));
- }
- }
-
- // Content dispositions can contain other text besides the file name, and they can be in any order.
- // Elements are separated by semicolons. Sometimes the file names are contained in quotes.
- public static String getFileNameFromHeaders(Context context, String contentDispositionString, String contentTypeString, String urlString) {
- // Define a file name string.
- String fileNameString;
-
- // Only process the content disposition string if it isn't null.
- if (contentDispositionString != null) { // The content disposition is not null.
- // Check to see if the content disposition contains a file name.
- if (contentDispositionString.contains("filename=")) { // The content disposition contains a filename.
- // Get the part of the content disposition after `filename=`.
- fileNameString = contentDispositionString.substring(contentDispositionString.indexOf("filename=") + 9);
-
- // Remove any `;` and anything after it. This removes any entries after the filename.
- if (fileNameString.contains(";")) {
- // Remove the first `;` and everything after it.
- fileNameString = fileNameString.substring(0, fileNameString.indexOf(";") - 1);
- }
-
- // Remove any `"` at the beginning of the string.
- if (fileNameString.startsWith("\"")) {
- // Remove the first character.
- fileNameString = fileNameString.substring(1);
- }
-
- // Remove any `"` at the end of the string.
- if (fileNameString.endsWith("\"")) {
- // Remove the last character.
- fileNameString = fileNameString.substring(0, fileNameString.length() - 1);
- }
- } else { // The headers contain no useful information.
- // Get the file name string from the URL.
- fileNameString = getFileNameFromUrl(context, urlString, contentTypeString);
- }
- } else { // The content disposition is null.
- // Get the file name string from the URL.
- fileNameString = getFileNameFromUrl(context, urlString, contentTypeString);
- }
-
- // Return the file name string.
- return fileNameString;
- }
-
- private static String getFileNameFromUrl(Context context, String urlString, String contentTypeString) {
- // Convert the URL string to a URI.
- Uri uri = Uri.parse(urlString);
-
- // Get the last path segment.
- String lastPathSegment = uri.getLastPathSegment();
-
- // Use a default file name if the last path segment is null.
- if (lastPathSegment == null) {
- lastPathSegment = context.getString(R.string.file);
-
- if (MimeTypeMap.getSingleton().hasMimeType(contentTypeString)) { // The content type contains a MIME type.
- // Add the file extension that matches the MIME type.
- lastPathSegment = lastPathSegment + "." + MimeTypeMap.getSingleton().getExtensionFromMimeType(contentTypeString);
- }
- }
-
- // Return the last path segment as the file name.
- return lastPathSegment;
- }
-}
\ No newline at end of file
projects / PrivacyBrowserAndroid.git / blobdiff