+ 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.
+ 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.
+ 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, newLength, Spanned.SPAN_EXCLUSIVE_EXCLUSIVE);
+ }
+ responseHeadersBuilder.append(": ");
+ responseHeadersBuilder.append(httpUrlConnection.getHeaderField(i));
+
+ // Increment the iteration variable.
+ i++;
+ }