Set HostnameVerifier as an Options

src/main/java/com/github/nkzawa/engineio/client/Socket.java

@@ -10,6 +10,7 @@ import com.github.nkzawa.parseqs.ParseQS;
 import com.github.nkzawa.thread.EventThread;
 import org.json.JSONException;
 
+import javax.net.ssl.HostnameVerifier;
 import javax.net.ssl.SSLContext;
 import java.net.URI;
 import java.net.URISyntaxException;
@@ -121,6 +122,7 @@ public class Socket extends Emitter {
     private Future pingTimeoutTimer;
     private Future pingIntervalTimer;
     private SSLContext sslContext;
+    private HostnameVerifier hostnameVerifier;
 
     private ReadyState readyState;
     private ScheduledExecutorService heartbeatScheduler;
@@ -197,6 +199,7 @@ public class Socket extends Emitter {
                 opts.transports : new String[]{Polling.NAME, WebSocket.NAME}));
         this.policyPort = opts.policyPort != 0 ? opts.policyPort : 843;
         this.rememberUpgrade = opts.rememberUpgrade;
+        this.hostnameVerifier = opts.hostnameVerifier;
     }
 
     /**
@@ -254,6 +257,7 @@ public class Socket extends Emitter {
         opts.timestampParam = this.timestampParam;
         opts.policyPort = this.policyPort;
         opts.socket = this;
+        opts.hostnameVerifier = this.hostnameVerifier;
 
         Transport transport;
         if (WebSocket.NAME.equals(name)) {

src/main/java/com/github/nkzawa/engineio/client/Transport.java

@@ -6,6 +6,7 @@ import com.github.nkzawa.engineio.parser.Packet;
 import com.github.nkzawa.engineio.parser.Parser;
 import com.github.nkzawa.thread.EventThread;
 
+import javax.net.ssl.HostnameVerifier;
 import javax.net.ssl.SSLContext;
 import java.util.Map;
 
@@ -42,6 +43,7 @@ public abstract class Transport extends Emitter {
     protected String timestampParam;
     protected SSLContext sslContext;
     protected Socket socket;
+    protected HostnameVerifier hostnameVerifier;
 
     protected ReadyState readyState;
 
@@ -55,6 +57,7 @@ public abstract class Transport extends Emitter {
         this.timestampRequests = opts.timestampRequests;
         this.sslContext = opts.sslContext;
         this.socket = opts.socket;
+        this.hostnameVerifier = opts.hostnameVerifier;
     }
 
     protected Transport onError(String msg, Exception desc) {
@@ -144,6 +147,7 @@ public abstract class Transport extends Emitter {
         public int policyPort = -1;
         public Map<String, String> query;
         public SSLContext sslContext;
+        public HostnameVerifier hostnameVerifier;
         protected Socket socket;
     }
 }

src/main/java/com/github/nkzawa/engineio/client/transports/WebSocket.java

@@ -53,6 +53,9 @@ public class WebSocket extends Transport {
             SSLSocketFactory factory = sslContext.getSocketFactory();// (SSLSocketFactory) SSLSocketFactory.getDefault();
             client.setSslSocketFactory(factory);
         }
+        if (this.hostnameVerifier != null) {
+            client.setHostnameVerifier(this.hostnameVerifier);
+        }
         Request.Builder builder = new Request.Builder().url(uri());
         for (Map.Entry<String, String> entry : headers.entrySet()) {
             builder.addHeader(entry.getKey(), entry.getValue());

src/test/java/com/github/nkzawa/engineio/client/SSLConnectionTest.java

@@ -6,6 +6,7 @@ import org.junit.Test;
 import org.junit.runner.RunWith;
 import org.junit.runners.JUnit4;
 
+import javax.net.ssl.HostnameVerifier;
 import javax.net.ssl.KeyManagerFactory;
 import javax.net.ssl.SSLContext;
 import javax.net.ssl.TrustManagerFactory;
@@ -23,15 +24,11 @@ import static org.junit.Assert.assertThat;
 @RunWith(JUnit4.class)
 public class SSLConnectionTest extends Connection {
 
-    static {
-        // for test on localhost
-        javax.net.ssl.HttpsURLConnection.setDefaultHostnameVerifier(
-                new javax.net.ssl.HostnameVerifier(){
+    static HostnameVerifier hostnameVerifier = new javax.net.ssl.HostnameVerifier(){
         public boolean verify(String hostname, javax.net.ssl.SSLSession sslSession) {
             return hostname.equals("localhost");
         }
-                });
-    }
+    };
 
     private Socket socket;
 
@@ -74,6 +71,7 @@ public class SSLConnectionTest extends Connection {
 
         Socket.Options opts = createOptions();
         opts.sslContext = createSSLContext();
+        opts.hostnameVerifier = SSLConnectionTest.hostnameVerifier;
         socket = new Socket(opts);
         socket.on(Socket.EVENT_OPEN, new Emitter.Listener() {
             @Override
@@ -98,6 +96,7 @@ public class SSLConnectionTest extends Connection {
 
         Socket.Options opts = createOptions();
         opts.sslContext = createSSLContext();
+        opts.hostnameVerifier = SSLConnectionTest.hostnameVerifier;
         socket = new Socket(opts);
         socket.on(Socket.EVENT_OPEN, new Emitter.Listener() {
             @Override
@@ -127,7 +126,9 @@ public class SSLConnectionTest extends Connection {
         final BlockingQueue<Object> values = new LinkedBlockingQueue<Object>();
 
         Socket.setDefaultSSLContext(createSSLContext());
-        socket = new Socket(createOptions());
+        Socket.Options opts = createOptions();
+        opts.hostnameVerifier = SSLConnectionTest.hostnameVerifier;
+        socket = new Socket(opts);
         socket.on(Socket.EVENT_OPEN, new Emitter.Listener() {
             @Override
             public void call(Object... args) {