--- /dev/null
+/*
+ * Copyright © 2017-2018 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.activities;
+
+import android.annotation.SuppressLint;
+import android.app.Activity;
+import android.app.DialogFragment;
+import android.content.Context;
+import android.content.SharedPreferences;
+import android.graphics.Typeface;
+import android.os.AsyncTask;
+import android.os.Build;
+import android.os.Bundle;
+import android.os.LocaleList;
+import android.preference.PreferenceManager;
+import android.support.v4.app.NavUtils;
+import android.support.v7.app.ActionBar;
+import android.support.v7.app.AppCompatActivity;
+import android.support.v7.widget.Toolbar;
+import android.text.SpannableStringBuilder;
+import android.text.Spanned;
+import android.text.style.ForegroundColorSpan;
+import android.text.style.StyleSpan;
+import android.view.KeyEvent;
+import android.view.Menu;
+import android.view.MenuItem;
+import android.view.View;
+import android.view.inputmethod.InputMethodManager;
+import android.webkit.CookieManager;
+import android.widget.EditText;
+import android.widget.ProgressBar;
+import android.widget.TextView;
+
+import com.stoutner.privacybrowser.R;
+import com.stoutner.privacybrowser.dialogs.AboutViewSourceDialog;
+
+import java.io.BufferedInputStream;
+import java.io.ByteArrayOutputStream;
+import java.io.IOException;
+import java.io.InputStream;
+import java.net.HttpURLConnection;
+import java.net.URL;
+import java.util.Locale;
+
+public class ViewSourceActivity extends AppCompatActivity {
+ // `activity` is used in `onCreate()` and `goBack()`.
+ Activity activity;
+
+ // The color spans are used in `onCreate()` and `highlightUrlText()`.
+ private ForegroundColorSpan redColorSpan;
+ private ForegroundColorSpan initialGrayColorSpan;
+ private ForegroundColorSpan finalGrayColorSpan;
+
+ @Override
+ protected void onCreate(Bundle savedInstanceState) {
+ // Set the theme.
+ if (MainWebViewActivity.darkTheme) {
+ setTheme(R.style.PrivacyBrowserDark);
+ } else {
+ setTheme(R.style.PrivacyBrowserLight);
+ }
+
+ // Run the default commands.
+ super.onCreate(savedInstanceState);
+
+ // Store a handle for the current activity.
+ activity = this;
+
+ // Set the content view.
+ setContentView(R.layout.view_source_coordinatorlayout);
+
+ // `SupportActionBar` from `android.support.v7.app.ActionBar` must be used until the minimum API is >= 21.
+ Toolbar viewSourceAppBar = findViewById(R.id.view_source_toolbar);
+ setSupportActionBar(viewSourceAppBar);
+
+ // Setup the app bar.
+ final ActionBar appBar = getSupportActionBar();
+
+ // Remove the incorrect warning in Android Studio that appBar might be null.
+ assert appBar != null;
+
+ // Add the custom layout to the app bar.
+ appBar.setCustomView(R.layout.view_source_app_bar);
+ appBar.setDisplayOptions(ActionBar.DISPLAY_SHOW_CUSTOM);
+
+ // Get a handle for the url text box.
+ EditText urlEditText = findViewById(R.id.url_edittext);
+
+ // Get the formatted URL string from the main activity.
+ String formattedUrlString = MainWebViewActivity.formattedUrlString;
+
+ // Populate the URL text box.
+ urlEditText.setText(formattedUrlString);
+
+ // Initialize the foreground color spans for highlighting the URLs. We have to use the deprecated `getColor()` until API >= 23.
+ redColorSpan = new ForegroundColorSpan(getResources().getColor(R.color.red_a700));
+ initialGrayColorSpan = new ForegroundColorSpan(getResources().getColor(R.color.gray_500));
+ finalGrayColorSpan = new ForegroundColorSpan(getResources().getColor(R.color.gray_500));
+
+ // Apply text highlighting to the URL.
+ highlightUrlText();
+
+ // Get a handle for the input method manager, which is used to hide the keyboard.
+ InputMethodManager inputMethodManager = (InputMethodManager) getSystemService(Context.INPUT_METHOD_SERVICE);
+
+ // Let Android Studio know that we aren't worried about the input method manager being null.
+ assert inputMethodManager != null;
+
+ // Remove the formatting from the URL when the user is editing the text.
+ urlEditText.setOnFocusChangeListener((View v, boolean hasFocus) -> {
+ if (hasFocus) { // The user is editing `urlTextBox`.
+ // Remove the highlighting.
+ urlEditText.getText().removeSpan(redColorSpan);
+ urlEditText.getText().removeSpan(initialGrayColorSpan);
+ urlEditText.getText().removeSpan(finalGrayColorSpan);
+ } else { // The user has stopped editing `urlTextBox`.
+ // Hide the soft keyboard.
+ inputMethodManager.hideSoftInputFromWindow(urlEditText.getWindowToken(), 0);
+
+ // Reapply the highlighting.
+ highlightUrlText();
+
+
+ }
+ });
+
+ // Set the go button on the keyboard to request new source data.
+ urlEditText.setOnKeyListener((View v, int keyCode, KeyEvent event) -> {
+ // Request new source data if the enter key was pressed.
+ if ((event.getAction() == KeyEvent.ACTION_DOWN) && (keyCode == KeyEvent.KEYCODE_ENTER)) {
+ // Hide the soft keyboard.
+ inputMethodManager.hideSoftInputFromWindow(urlEditText.getWindowToken(), 0);
+
+ // Remove the focus from the URL box.
+ urlEditText.clearFocus();
+
+ // Get new source data for the current URL.
+ new GetSource().execute(urlEditText.getText().toString());
+
+ // Consume the key press.
+ return true;
+ } else {
+ // Do not consume the key press.
+ return false;
+ }
+ });
+
+ // Get the source as an `AsyncTask`.
+ new GetSource().execute(formattedUrlString);
+ }
+
+ @Override
+ public boolean onCreateOptionsMenu(Menu menu) {
+ // Inflate the menu; this adds items to the action bar if it is present.
+ getMenuInflater().inflate(R.menu.view_source_options_menu, menu);
+
+ // Display the menu.
+ return true;
+ }
+
+ @Override
+ public boolean onOptionsItemSelected(MenuItem menuItem) {
+ // Get a handle for the about alert dialog.
+ DialogFragment aboutDialogFragment = new AboutViewSourceDialog();
+
+ // Show the about alert dialog.
+ aboutDialogFragment.show(getFragmentManager(), getString(R.string.about));
+
+ // Consume the event.
+ return true;
+ }
+
+ public void goBack(View view) {
+ // Go home.
+ NavUtils.navigateUpFromSameTask(activity);
+ }
+
+ private void highlightUrlText() {
+ // Get a handle for the URL EditText.
+ EditText urlEditText = findViewById(R.id.url_edittext);
+
+ // Get the URL.
+ String urlString = urlEditText.getText().toString();
+
+ // Highlight the beginning of the URL.
+ if (urlString.startsWith("http://")) { // Highlight the protocol of connections that are not encrypted.
+ urlEditText.getText().setSpan(redColorSpan, 0, 7, Spanned.SPAN_INCLUSIVE_INCLUSIVE);
+ } else if (urlString.startsWith("https://")) { // De-emphasize the protocol of connections that are encrypted.
+ urlEditText.getText().setSpan(initialGrayColorSpan, 0, 8, Spanned.SPAN_INCLUSIVE_INCLUSIVE);
+ }
+
+ // Get the index of the `/` immediately after the domain name.
+ int endOfDomainName = urlString.indexOf("/", (urlString.indexOf("//") + 2));
+
+ // De-emphasize the text after the domain name.
+ if (endOfDomainName > 0) {
+ urlEditText.getText().setSpan(finalGrayColorSpan, endOfDomainName, urlString.length(), Spanned.SPAN_INCLUSIVE_INCLUSIVE);
+ }
+ }
+
+ // The first `String` declares the parameters. The `Void` does not declare progress units. The last `String` contains the results.
+ // `StaticFieldLeaks` are suppressed so that Android Studio doesn't complain about running an AsyncTask in a non-static context.
+ @SuppressLint("StaticFieldLeak")
+ private class GetSource extends AsyncTask<String, Void, String> {
+ // The class variables pass information from `doInBackground()` to `onPostExecute()`.
+ SpannableStringBuilder responseMessageBuilder;
+ SpannableStringBuilder requestHeadersBuilder;
+ SpannableStringBuilder responseHeadersBuilder;
+
+ // `onPreExecute()` operates on the UI thread.
+ @Override
+ protected void onPreExecute() {
+ // Get a handle for the progress bar.
+ ProgressBar progressBar = findViewById(R.id.progress_bar);
+
+ // Make the progress bar visible.
+ progressBar.setVisibility(View.VISIBLE);
+
+ // Set the progress bar to be indeterminate.
+ progressBar.setIndeterminate(true);
+ }
+
+ @Override
+ protected String doInBackground(String... formattedUrlString) {
+ // Initialize the response body `String`.
+ String responseBodyString = "";
+
+ // 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(formattedUrlString[0]);
+
+ // Open a connection to the URL. No data is actually sent at this point.
+ HttpURLConnection httpUrlConnection = (HttpURLConnection) url.openConnection();
+
+ // Instantiate the variables necessary to build the request headers.
+ requestHeadersBuilder = new SpannableStringBuilder();
+ int oldRequestHeadersBuilderLength;
+ int newRequestHeadersBuilderLength;
+
+
+ // Set the `Host` header property.
+ httpUrlConnection.setRequestProperty("Host", url.getHost());
+
+ // Add the `Host` header to the string builder and format the text.
+ if (Build.VERSION.SDK_INT >= 21) { // Newer versions of Android are so smart.
+ requestHeadersBuilder.append("Host", new StyleSpan(Typeface.BOLD), Spanned.SPAN_EXCLUSIVE_EXCLUSIVE);
+ } else { // Older versions not so much.
+ oldRequestHeadersBuilderLength = requestHeadersBuilder.length();
+ requestHeadersBuilder.append("Host");
+ newRequestHeadersBuilderLength = requestHeadersBuilder.length();
+ requestHeadersBuilder.setSpan(new StyleSpan(Typeface.BOLD), oldRequestHeadersBuilderLength + 1, newRequestHeadersBuilderLength, 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"));
+ if (Build.VERSION.SDK_INT >= 21) { // Newer versions of Android are so smart.
+ requestHeadersBuilder.append("Connection", new StyleSpan(Typeface.BOLD), Spanned.SPAN_EXCLUSIVE_EXCLUSIVE);
+ } else { // Older versions not so much.
+ oldRequestHeadersBuilderLength = requestHeadersBuilder.length();
+ requestHeadersBuilder.append("Connection");
+ newRequestHeadersBuilderLength = requestHeadersBuilder.length();
+ requestHeadersBuilder.setSpan(new StyleSpan(Typeface.BOLD), oldRequestHeadersBuilderLength + 1, newRequestHeadersBuilderLength, Spanned.SPAN_EXCLUSIVE_EXCLUSIVE);
+ }
+ requestHeadersBuilder.append(": keep-alive");
+
+
+ // Get the current `User-Agent` string.
+ String userAgentString = MainWebViewActivity.appliedUserAgentString;
+
+ // Set the `User-Agent` header property.
+ httpUrlConnection.setRequestProperty("User-Agent", userAgentString);
+
+ // Add the `User-Agent` header to the string builder and format the text.
+ requestHeadersBuilder.append(System.getProperty("line.separator"));
+ if (Build.VERSION.SDK_INT >= 21) { // Newer versions of Android are so smart.
+ requestHeadersBuilder.append("User-Agent", new StyleSpan(Typeface.BOLD), Spanned.SPAN_EXCLUSIVE_EXCLUSIVE);
+ } else { // Older versions not so much.
+ oldRequestHeadersBuilderLength = requestHeadersBuilder.length();
+ requestHeadersBuilder.append("User-Agent");
+ newRequestHeadersBuilderLength = requestHeadersBuilder.length();
+ requestHeadersBuilder.setSpan(new StyleSpan(Typeface.BOLD), oldRequestHeadersBuilderLength + 1, newRequestHeadersBuilderLength, Spanned.SPAN_EXCLUSIVE_EXCLUSIVE);
+ }
+ requestHeadersBuilder.append(": ");
+ requestHeadersBuilder.append(userAgentString);
+
+
+ // 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"));
+ if (Build.VERSION.SDK_INT >= 21) { // Newer versions of Android are so smart.
+ requestHeadersBuilder.append("Upgrade-Insecure-Requests", new StyleSpan(Typeface.BOLD), Spanned.SPAN_EXCLUSIVE_EXCLUSIVE);
+ } else { // Older versions not so much.
+ oldRequestHeadersBuilderLength = requestHeadersBuilder.length();
+ requestHeadersBuilder.append("Upgrade-Insecure_Requests");
+ newRequestHeadersBuilderLength = requestHeadersBuilder.length();
+ requestHeadersBuilder.setSpan(new StyleSpan(Typeface.BOLD), oldRequestHeadersBuilderLength + 1, newRequestHeadersBuilderLength, Spanned.SPAN_EXCLUSIVE_EXCLUSIVE);
+ }
+ requestHeadersBuilder.append(": 1");
+
+
+ // Set the `x-requested-with` header property.
+ httpUrlConnection.setRequestProperty("x-requested-with", "");
+
+ // Add the `x-requested-with` header to the string builder and format the text.
+ requestHeadersBuilder.append(System.getProperty("line.separator"));
+ if (Build.VERSION.SDK_INT >= 21) { // Newer versions of Android are so smart.
+ requestHeadersBuilder.append("x-requested-with", new StyleSpan(Typeface.BOLD), Spanned.SPAN_EXCLUSIVE_EXCLUSIVE);
+ } else { // Older versions not so much.
+ oldRequestHeadersBuilderLength = requestHeadersBuilder.length();
+ requestHeadersBuilder.append("x-requested-with");
+ newRequestHeadersBuilderLength = requestHeadersBuilder.length();
+ requestHeadersBuilder.setSpan(new StyleSpan(Typeface.BOLD), oldRequestHeadersBuilderLength + 1, newRequestHeadersBuilderLength, Spanned.SPAN_EXCLUSIVE_EXCLUSIVE);
+ }
+ requestHeadersBuilder.append(": ");
+
+
+ // Get a handle for the shared preferences.
+ SharedPreferences sharedPreferences = PreferenceManager.getDefaultSharedPreferences(getApplicationContext());
+
+ // Only populate `Do Not Track` if it is enabled.
+ if (sharedPreferences.getBoolean("do_not_track", false)) {
+ // Set the `dnt` header property.
+ httpUrlConnection.setRequestProperty("dnt", "1");
+
+ // Add the `dnt` header to the string builder and format the text.
+ requestHeadersBuilder.append(System.getProperty("line.separator"));
+ if (Build.VERSION.SDK_INT >= 21) { // Newer versions of Android are so smart.
+ requestHeadersBuilder.append("dnt", new StyleSpan(Typeface.BOLD), Spanned.SPAN_EXCLUSIVE_EXCLUSIVE);
+ } else { // Older versions not so much.
+ oldRequestHeadersBuilderLength = requestHeadersBuilder.length();
+ requestHeadersBuilder.append("dnt");
+ newRequestHeadersBuilderLength = requestHeadersBuilder.length();
+ requestHeadersBuilder.setSpan(new StyleSpan(Typeface.BOLD), oldRequestHeadersBuilderLength + 1, newRequestHeadersBuilderLength, 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");
+
+ // Add the `Accept` header to the string builder and format the text.
+ requestHeadersBuilder.append(System.getProperty("line.separator"));
+ if (Build.VERSION.SDK_INT >= 21) { // Newer versions of Android are so smart.
+ requestHeadersBuilder.append("Accept", new StyleSpan(Typeface.BOLD), Spanned.SPAN_EXCLUSIVE_EXCLUSIVE);
+ } else { // Older versions not so much.
+ oldRequestHeadersBuilderLength = requestHeadersBuilder.length();
+ requestHeadersBuilder.append("Accept");
+ newRequestHeadersBuilderLength = requestHeadersBuilder.length();
+ requestHeadersBuilder.setSpan(new StyleSpan(Typeface.BOLD), oldRequestHeadersBuilderLength + 1, newRequestHeadersBuilderLength, 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");
+
+
+ // Instantiate a locale string.
+ String localeString;
+
+ // Populate the locale string.
+ if (Build.VERSION.SDK_INT >= 24) { // SDK >= 24 has a list of locales.
+ // Get the list of locales.
+ LocaleList localeList = getResources().getConfiguration().getLocales();
+
+ // Initialize a string builder to extract the locales from the list.
+ StringBuilder localesStringBuilder = new StringBuilder();
+
+ // Initialize a `q` value, which is used by `WebView` to indicate the order of importance of the languages.
+ int q = 10;
+
+ // Populate the string builder with the contents of the locales list.
+ for (int i = 0; i < localeList.size(); i++) {
+ // Append a comma if there is already an item in the string builder.
+ if (i > 0) {
+ localesStringBuilder.append(",");
+ }
+
+ // Get the indicated locale from the list.
+ localesStringBuilder.append(localeList.get(i));
+
+ // If not the first locale, append `;q=0.i`, which drops by .1 for each removal from the main locale.
+ if (q < 10) {
+ localesStringBuilder.append(";q=0.");
+ localesStringBuilder.append(q);
+ }
+
+ // Decrement `q`.
+ q--;
+ }
+
+ // Store the populated string builder in the locale string.
+ localeString = localesStringBuilder.toString();
+ } else { // SDK < 24 only has a primary locale.
+ // Store the locale in the locale string.
+ localeString = Locale.getDefault().toString();
+ }
+
+ // 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"));
+ if (Build.VERSION.SDK_INT >= 21) { // Newer versions of Android are so smart.
+ requestHeadersBuilder.append("Accept-Language", new StyleSpan(Typeface.BOLD), Spanned.SPAN_EXCLUSIVE_EXCLUSIVE);
+ } else { // Older versions not so much.
+ oldRequestHeadersBuilderLength = requestHeadersBuilder.length();
+ requestHeadersBuilder.append("Accept-Language");
+ newRequestHeadersBuilderLength = requestHeadersBuilder.length();
+ requestHeadersBuilder.setSpan(new StyleSpan(Typeface.BOLD), oldRequestHeadersBuilderLength + 1, newRequestHeadersBuilderLength, 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) {
+ // Set the `Cookie` header property.
+ httpUrlConnection.setRequestProperty("Cookie", cookiesString);
+
+ // Add the `Cookie` header to the string builder and format the text.
+ requestHeadersBuilder.append(System.getProperty("line.separator"));
+ if (Build.VERSION.SDK_INT >= 21) { // Newer versions of Android are so smart.
+ requestHeadersBuilder.append("Cookie", new StyleSpan(Typeface.BOLD), Spanned.SPAN_EXCLUSIVE_EXCLUSIVE);
+ } else { // Older versions not so much.
+ oldRequestHeadersBuilderLength = requestHeadersBuilder.length();
+ requestHeadersBuilder.append("Cookie");
+ newRequestHeadersBuilderLength = requestHeadersBuilder.length();
+ requestHeadersBuilder.setSpan(new StyleSpan(Typeface.BOLD), oldRequestHeadersBuilderLength + 1, newRequestHeadersBuilderLength, 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"));
+ if (Build.VERSION.SDK_INT >= 21) { // Newer versions of Android are so smart.
+ requestHeadersBuilder.append("Accept-Encoding", new StyleSpan(Typeface.BOLD), Spanned.SPAN_EXCLUSIVE_EXCLUSIVE);
+ } else { // Older versions not so much.
+ oldRequestHeadersBuilderLength = requestHeadersBuilder.length();
+ requestHeadersBuilder.append("Accept-Encoding");
+ newRequestHeadersBuilderLength = requestHeadersBuilder.length();
+ requestHeadersBuilder.setSpan(new StyleSpan(Typeface.BOLD), oldRequestHeadersBuilderLength + 1, newRequestHeadersBuilderLength, Spanned.SPAN_EXCLUSIVE_EXCLUSIVE);
+ }
+ requestHeadersBuilder.append(": gzip");
+
+
+ // 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 {
+ // Initialize the string builders.
+ responseMessageBuilder = new SpannableStringBuilder();
+ responseHeadersBuilder = new SpannableStringBuilder();
+
+ // Get the response code, which causes the connection to the server to be made.
+ int responseCode = httpUrlConnection.getResponseCode();
+
+ // Populate the response message string builder.
+ if (Build.VERSION.SDK_INT >= 21) { // Newer versions of Android are so smart.
+ responseMessageBuilder.append(String.valueOf(responseCode), new StyleSpan(Typeface.BOLD), Spanned.SPAN_EXCLUSIVE_EXCLUSIVE);
+ } else { // Older versions not so much.
+ responseMessageBuilder.append(String.valueOf(responseCode));
+ int newLength = responseMessageBuilder.length();
+ responseMessageBuilder.setSpan(new StyleSpan(Typeface.BOLD), 0, newLength, 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.
+ if (Build.VERSION.SDK_INT >= 21) { // Newer versions of Android are so smart.
+ responseHeadersBuilder.append(httpUrlConnection.getHeaderFieldKey(i), new StyleSpan(Typeface.BOLD), Spanned.SPAN_EXCLUSIVE_EXCLUSIVE);
+ } else { // Older versions not so much.
+ int oldLength = responseHeadersBuilder.length();
+ responseHeadersBuilder.append(httpUrlConnection.getHeaderFieldKey(i));
+ int newLength = responseHeadersBuilder.length();
+ responseHeadersBuilder.setSpan(new StyleSpan(Typeface.BOLD), oldLength + 1, newLength, 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];
+
+ // Instantiate the variable to track the buffer length.
+ 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 transferred 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 e) {
+ e.printStackTrace();
+ }
+
+ // Close the input stream.
+ inputStream.close();
+
+ // Populate the response body string with the contents of the byte array output stream.
+ responseBodyString = byteArrayOutputStream.toString();
+ } finally {
+ // Disconnect `httpUrlConnection`.
+ httpUrlConnection.disconnect();
+ }
+ } catch (IOException e) {
+ e.printStackTrace();
+ }
+
+ // Return the response body string as the result.
+ return responseBodyString;
+ }
+
+ // `onPostExecute()` operates on the UI thread.
+ @Override
+ protected void onPostExecute(String responseBodyString){
+ // Get handles for the text views.
+ TextView requestHeadersTextView = findViewById(R.id.request_headers);
+ TextView responseMessageTextView = findViewById(R.id.response_message);
+ TextView responseHeadersTextView = findViewById(R.id.response_headers);
+ TextView responseBodyTextView = findViewById(R.id.response_body);
+ ProgressBar progressBar = findViewById(R.id.progress_bar);
+
+ // Populate the text views.
+ requestHeadersTextView.setText(requestHeadersBuilder);
+ responseMessageTextView.setText(responseMessageBuilder);
+ responseHeadersTextView.setText(responseHeadersBuilder);
+ responseBodyTextView.setText(responseBodyString);
+
+ // Hide the progress bar.
+ progressBar.setIndeterminate(false);
+ progressBar.setVisibility(View.GONE);
+ }
+ }
+}
\ No newline at end of file
projects / PrivacyBrowserAndroid.git / blobdiff