Android Socket.io Websocket Transport does not works in SSL

Question

I\'m using gottox socket.io java client for an Android chat application.
I could connect to both web-socket and Xhr transport in HTTP mode. But when i switch to HTTPS o

Answer 1

Update

It might be that with new versions IO.setDefaultSSLContext and IO. setDefaultHostnameVerifier methods are not available. Instead now we can create our own OkHttpClient and set the hostname verifier and ssl socket factory etc on it as mentioned on socket.io-client-java usage. Here is the sniplet from there:

OkHttpClient okHttpClient = new OkHttpClient.Builder()
                      .hostnameVerifier(myHostnameVerifier)
                      .sslSocketFactory(mySSLContext.getSocketFactory(), myX509TrustManager)
                      .build(); // default settings for all sockets 

IO.setDefaultOkHttpWebSocketFactory(okHttpClient); 
IO.setDefaultOkHttpCallFactory(okHttpClient);

---

Initial Answer:

I had the same issue with io.socket:socket.io-client:0.7.0 version of socket.io library on Android for long. It used to work fine for http protocol, however for https protocol it had trouble establishing connection giving xhr poll errors.

Following solution works for me without modifying the library itself:

// Socket connection
private Socket mSocket;

// Configure options
IO.Options options = new IO.Options();
// ... add more options

// End point https 
String yourEndpoint = "https://whatever.yoururl.com"
String yourHostName = "yoururl.com"

// If https, explicitly tell set the sslContext.
if (yourEndpoint.startsWith("https://")) {        
    try {
        // Default settings for all sockets

        // Set default ssl context
        IO.setDefaultSSLContext(SSLContext.getDefault());

        // Set default hostname
        HostnameVerifier hostnameVerifier = new HostnameVerifier() {
            @Override
            public boolean verify(String hostname, SSLSession session) {
                HostnameVerifier hv = HttpsURLConnection.getDefaultHostnameVerifier();
                return hv.verify(yourHostName, session);
            }
        };
        IO.setDefaultHostnameVerifier(hostnameVerifier);

        // set as an option
        options.sslContext = SSLContext.getDefault();
        options.hostnameVerifier = hostnameVerifier;
        options.secure = true;

    } catch (NoSuchAlgorithmException e) {
        e.printStackTrace();
    }
}

// Instantiate the socket
mSocket = IO.socket(mEndpoint, options);

Hope this helps.