+++ /dev/null
-/*
- * Copyright © 2017-2022 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.backgroundtasks;
-
-import android.annotation.SuppressLint;
-import android.content.ContentResolver;
-import android.database.Cursor;
-import android.graphics.Typeface;
-import android.net.Uri;
-import android.text.SpannableStringBuilder;
-import android.text.Spanned;
-import android.text.style.StyleSpan;
-import android.webkit.CookieManager;
-
-import com.stoutner.privacybrowser.viewmodels.WebViewSource;
-
-import java.io.BufferedInputStream;
-import java.io.BufferedReader;
-import java.io.ByteArrayOutputStream;
-import java.io.IOException;
-import java.io.InputStream;
-import java.io.InputStreamReader;
-import java.net.HttpURLConnection;
-import java.net.Proxy;
-import java.net.URL;
-import java.security.SecureRandom;
-import java.security.cert.X509Certificate;
-
-import javax.net.ssl.HostnameVerifier;
-import javax.net.ssl.HttpsURLConnection;
-import javax.net.ssl.SSLContext;
-import javax.net.ssl.SSLSocketFactory;
-import javax.net.ssl.TrustManager;
-import javax.net.ssl.X509TrustManager;
-
-public class GetSourceBackgroundTask {
- public SpannableStringBuilder[] acquire(String urlString, String userAgent, String localeString, Proxy proxy, ContentResolver contentResolver, WebViewSource webViewSource, boolean ignoreSslErrors) {
- // Initialize the spannable string builders.
- SpannableStringBuilder requestHeadersBuilder = new SpannableStringBuilder();
- SpannableStringBuilder responseMessageBuilder = new SpannableStringBuilder();
- SpannableStringBuilder responseHeadersBuilder = new SpannableStringBuilder();
- SpannableStringBuilder responseBodyBuilder = new SpannableStringBuilder();
-
- if (urlString.startsWith("content://")) { // This is a content URL.
- // Attempt to read the content data. Return an error if this fails.
- try {
- // Get a URI for the content URL.
- Uri contentUri = Uri.parse(urlString);
-
- // Get a cursor with metadata about the content URL.
- Cursor contentCursor = contentResolver.query(contentUri, null, null, null, null);
-
- // Move the content cursor to the first row.
- contentCursor.moveToFirst();
-
- for (int i = 0; i < contentCursor.getColumnCount(); i++) {
- // Add a new line if this is not the first entry.
- if (i > 0) {
- responseHeadersBuilder.append(System.getProperty("line.separator"));
- }
-
- // Add each header to the string builder.
- responseHeadersBuilder.append(contentCursor.getColumnName(i), new StyleSpan(Typeface.BOLD), Spanned.SPAN_EXCLUSIVE_EXCLUSIVE);
- responseHeadersBuilder.append(": ");
- responseHeadersBuilder.append(contentCursor.getString(i));
- }
-
- // Close the content cursor.
- contentCursor.close();
-
- // Create a buffered string reader for the content data.
- BufferedReader bufferedReader = new BufferedReader(new InputStreamReader(contentResolver.openInputStream(contentUri)));
-
- // Get the data from the buffered reader one line at a time.
- for (String contentLineString; ((contentLineString = bufferedReader.readLine()) != null);) {
- // Add the line to the response body builder.
- responseBodyBuilder.append(contentLineString);
-
- // Append a new line.
- responseBodyBuilder.append("\n");
- }
- } catch (Exception exception) {
- // Return the error message.
- webViewSource.returnError(exception.toString());
- }
- } else { // This is not a content URL.
- // Because everything relating to requesting data from a webserver can throw errors, the entire section must catch `IOExceptions`.
- try {
- // Get the current URL from the main activity.
- URL url = new URL(urlString);
-
- // Open a connection to the URL. No data is actually sent at this point.
- HttpURLConnection httpUrlConnection = (HttpURLConnection) url.openConnection(proxy);
-
- // Set the `Host` header property.
- httpUrlConnection.setRequestProperty("Host", url.getHost());
-
- // Add the `Host` header to the string builder and format the text.
- requestHeadersBuilder.append("Host", new StyleSpan(Typeface.BOLD), Spanned.SPAN_EXCLUSIVE_EXCLUSIVE);
- requestHeadersBuilder.append(": ");
- requestHeadersBuilder.append(url.getHost());
-
-
- // Set the `Connection` header property.
- httpUrlConnection.setRequestProperty("Connection", "keep-alive");
-
- // Add the `Connection` header to the string builder and format the text.
- requestHeadersBuilder.append(System.getProperty("line.separator"));
- requestHeadersBuilder.append("Connection", new StyleSpan(Typeface.BOLD), Spanned.SPAN_EXCLUSIVE_EXCLUSIVE);
- requestHeadersBuilder.append(": keep-alive");
-
-
- // Set the `Upgrade-Insecure-Requests` header property.
- httpUrlConnection.setRequestProperty("Upgrade-Insecure-Requests", "1");
-
- // Add the `Upgrade-Insecure-Requests` header to the string builder and format the text.
- requestHeadersBuilder.append(System.getProperty("line.separator"));
- requestHeadersBuilder.append("Upgrade-Insecure-Requests", new StyleSpan(Typeface.BOLD), Spanned.SPAN_EXCLUSIVE_EXCLUSIVE);
- requestHeadersBuilder.append(": 1");
-
-
- // Set the `User-Agent` header property.
- httpUrlConnection.setRequestProperty("User-Agent", userAgent);
-
- // Add the `User-Agent` header to the string builder and format the text.
- requestHeadersBuilder.append(System.getProperty("line.separator"));
- requestHeadersBuilder.append("User-Agent", new StyleSpan(Typeface.BOLD), Spanned.SPAN_EXCLUSIVE_EXCLUSIVE);
- requestHeadersBuilder.append(": ");
- requestHeadersBuilder.append(userAgent);
-
-
- // Set the `Sec-Fetch-Site` header property.
- httpUrlConnection.setRequestProperty("Sec-Fetch-Site", "none");
-
- // Add the `Sec-Fetch-Site` header to the string builder and format the text.
- requestHeadersBuilder.append(System.getProperty("line.separator"));
- requestHeadersBuilder.append("Sec-Fetch-Site", new StyleSpan(Typeface.BOLD), Spanned.SPAN_EXCLUSIVE_EXCLUSIVE);
- requestHeadersBuilder.append(": none");
-
-
- // Set the `Sec-Fetch-Mode` header property.
- httpUrlConnection.setRequestProperty("Sec-Fetch-Mode", "navigate");
-
- // Add the `Sec-Fetch-Mode` header to the string builder and format the text.
- requestHeadersBuilder.append(System.getProperty("line.separator"));
- requestHeadersBuilder.append("Sec-Fetch-Mode", new StyleSpan(Typeface.BOLD), Spanned.SPAN_EXCLUSIVE_EXCLUSIVE);
- requestHeadersBuilder.append(": navigate");
-
-
- // Set the `Sec-Fetch-User` header property.
- httpUrlConnection.setRequestProperty("Sec-Fetch-User", "?1");
-
- // Add the `Sec-Fetch-User` header to the string builder and format the text.
- requestHeadersBuilder.append(System.getProperty("line.separator"));
- requestHeadersBuilder.append("Sec-Fetch-User", new StyleSpan(Typeface.BOLD), Spanned.SPAN_EXCLUSIVE_EXCLUSIVE);
- requestHeadersBuilder.append(": ?1");
-
-
- // Set the `Accept` header property.
- httpUrlConnection.setRequestProperty("Accept", "text/html,application/xhtml+xml,application/xml;q=0.9,image/webp,image/apng,*/*;q=0.8,application/signed-exchange;v=b3");
-
- // Add the `Accept` header to the string builder and format the text.
- requestHeadersBuilder.append(System.getProperty("line.separator"));
- requestHeadersBuilder.append("Accept", new StyleSpan(Typeface.BOLD), Spanned.SPAN_EXCLUSIVE_EXCLUSIVE);
- requestHeadersBuilder.append(": ");
- requestHeadersBuilder.append("text/html,application/xhtml+xml,application/xml;q=0.9,image/webp,image/apng,*/*;q=0.8,application/signed-exchange;v=b3");
-
-
- // Set the `Accept-Language` header property.
- httpUrlConnection.setRequestProperty("Accept-Language", localeString);
-
- // Add the `Accept-Language` header to the string builder and format the text.
- requestHeadersBuilder.append(System.getProperty("line.separator"));
- requestHeadersBuilder.append("Accept-Language", new StyleSpan(Typeface.BOLD), Spanned.SPAN_EXCLUSIVE_EXCLUSIVE);
- requestHeadersBuilder.append(": ");
- requestHeadersBuilder.append(localeString);
-
-
- // Get the cookies for the current domain.
- String cookiesString = CookieManager.getInstance().getCookie(url.toString());
-
- // Only process the cookies if they are not null.
- if (cookiesString != null) {
- // Add the cookies to the header property.
- httpUrlConnection.setRequestProperty("Cookie", cookiesString);
-
- // Add the cookie header to the string builder and format the text.
- requestHeadersBuilder.append(System.getProperty("line.separator"));
- requestHeadersBuilder.append("Cookie", new StyleSpan(Typeface.BOLD), Spanned.SPAN_EXCLUSIVE_EXCLUSIVE);
- requestHeadersBuilder.append(": ");
- requestHeadersBuilder.append(cookiesString);
- }
-
-
- // `HttpUrlConnection` sets `Accept-Encoding` to be `gzip` by default. If the property is manually set, than `HttpUrlConnection` does not process the decoding.
- // Add the `Accept-Encoding` header to the string builder and format the text.
- requestHeadersBuilder.append(System.getProperty("line.separator"));
- requestHeadersBuilder.append("Accept-Encoding", new StyleSpan(Typeface.BOLD), Spanned.SPAN_EXCLUSIVE_EXCLUSIVE);
- requestHeadersBuilder.append(": gzip");
-
- // Ignore SSL errors if requested.
- if (ignoreSslErrors){
- // Create a new host name verifier.
- HostnameVerifier hostnameVerifier = (hostname, sslSession) -> {
- // Allow all host names.
- return true;
- };
-
- // Create a new trust manager. Lint wants to warn us that it is hard to securely implement an X509 trust manager.
- // But the point of this trust manager is that it should accept all certificates no matter what, so that isn't an issue in our case.
- @SuppressLint("CustomX509TrustManager") TrustManager[] trustManager = new TrustManager[] {
- new X509TrustManager() {
- @SuppressLint("TrustAllX509TrustManager")
- @Override
- public void checkClientTrusted(X509Certificate[] chain, String authType) {
- // Do nothing, which trusts all client certificates.
- }
-
- @SuppressLint("TrustAllX509TrustManager")
- @Override
- public void checkServerTrusted(X509Certificate[] chain, String authType) {
- // Do nothing, which trusts all server certificates.
- }
-
- @Override
- public X509Certificate[] getAcceptedIssuers() {
- return null;
- }
- }
- };
-
- // Get an SSL context. `TLS` provides a base instance available from API 1. <https://developer.android.com/reference/javax/net/ssl/SSLContext>
- SSLContext sslContext = SSLContext.getInstance("TLS");
-
- // Initialize the SSL context with the blank trust manager.
- sslContext.init(null, trustManager, new SecureRandom());
-
- // Get the SSL socket factory with the blank trust manager.
- SSLSocketFactory socketFactory = sslContext.getSocketFactory();
-
- // Set the HTTPS URL Connection to use the blank host name verifier.
- ((HttpsURLConnection) httpUrlConnection).setHostnameVerifier(hostnameVerifier);
-
- // Set the HTTPS URL connection to use the socket factory with the blank trust manager.
- ((HttpsURLConnection) httpUrlConnection).setSSLSocketFactory(socketFactory);
- }
-
- // 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.
- int responseCode = httpUrlConnection.getResponseCode();
-
- // Populate the response message string builder.
- responseMessageBuilder.append(String.valueOf(responseCode), new StyleSpan(Typeface.BOLD), Spanned.SPAN_EXCLUSIVE_EXCLUSIVE);
- responseMessageBuilder.append(": ");
- responseMessageBuilder.append(httpUrlConnection.getResponseMessage());
-
- // Initialize the iteration variable.
- int i = 0;
-
- // Iterate through the received header fields.
- while (httpUrlConnection.getHeaderField(i) != null) {
- // Add a new line if there is already information in the string builder.
- if (i > 0) {
- responseHeadersBuilder.append(System.getProperty("line.separator"));
- }
-
- // Add the header to the string builder and format the text.
- responseHeadersBuilder.append(httpUrlConnection.getHeaderFieldKey(i), new StyleSpan(Typeface.BOLD), Spanned.SPAN_EXCLUSIVE_EXCLUSIVE);
- responseHeadersBuilder.append(": ");
- responseHeadersBuilder.append(httpUrlConnection.getHeaderField(i));
-
- // Increment the iteration variable.
- i++;
- }
-
- // Instantiate an input stream for the response body.
- InputStream inputStream;
-
- // Get the correct input stream based on the response code.
- if (responseCode == 404) { // Get the error stream.
- inputStream = new BufferedInputStream(httpUrlConnection.getErrorStream());
- } else { // Get the response body stream.
- inputStream = new BufferedInputStream(httpUrlConnection.getInputStream());
- }
-
- // Initialize the byte array output stream and the conversion buffer byte array.
- ByteArrayOutputStream byteArrayOutputStream = new ByteArrayOutputStream();
- byte[] conversionBufferByteArray = new byte[1024];
-
- // Define the buffer length variable.
- int bufferLength;
-
- try {
- // Attempt to read data from the input stream and store it in the conversion buffer byte array. 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 is > 0.
- // Write the contents of the conversion buffer to the byte array output stream.
- byteArrayOutputStream.write(conversionBufferByteArray, 0, bufferLength);
- }
- } catch (IOException exception) {
- // Return the error message.
- webViewSource.returnError(exception.toString());
- }
-
- // Close the input stream.
- inputStream.close();
-
- // Populate the response body string with the contents of the byte array output stream.
- responseBodyBuilder.append(byteArrayOutputStream.toString());
- } finally {
- // Disconnect HTTP URL connection.
- httpUrlConnection.disconnect();
- }
- } catch (Exception exception) {
- // Return the error message.
- webViewSource.returnError(exception.toString());
- }
- }
-
- // Return the spannable string builders.
- return new SpannableStringBuilder[] {requestHeadersBuilder, responseMessageBuilder, responseHeadersBuilder, responseBodyBuilder};
- }
-}
\ No newline at end of file
projects / PrivacyBrowserAndroid.git / blobdiff