i'm newbie in nodejs and express.io , in android application i'm wrote this simple code to connect from android or java but iget connection error
app = require('express.io')()
app.http().io()
// Broadcast the new visitor event on ready route.
app.io.route('ready', function(req) {
req.io.broadcast('new visitor')
console.log('ready');
})
// Send client html.
app.get('/', function(req, res) {
//res.sendfile(__dirname + '/client.html')
req.io.broadcast('new visitor')
console.log('hello');
})
app.listen(7076)
this code maybe is correct, after opening http://192.168.1.5:7076 link in browser i get hello message, now with below code i'm try to connect but i get connection error:
private static final String SERVER_ADDRESS = "http://192.168.1.5:7076";
private Socket mSocket;
{
try {
mSocket = IO.socket(SERVER_ADDRESS);
} catch (URISyntaxException e) {
Log.e("Error URI", String.valueOf(e));
throw new RuntimeException(e);
}
}
public class ActivityHome extends FragmentActivity {
...
mSocket.on(Socket.EVENT_CONNECT_ERROR, onConnectError);
mSocket.on(Socket.EVENT_CONNECT_TIMEOUT, onConnectError);
mSocket.on("new message", onNewMessage);
mSocket.on("user joined", onUserJoined);
mSocket.on("user left", onUserLeft);
mSocket.on("typing", onTyping);
mSocket.on("stop typing", onStopTyping);
mSocket.connect();
...
}
private Emitter.Listener onConnectError = new Emitter.Listener() {
#Override
public void call(Object... args) {
runOnUiThread(new Runnable() {
#Override
public void run() {
Toast.makeText(getApplicationContext(),
"CONNECT ERROR", Toast.LENGTH_LONG).show();
}
});
}
};
Related
I'm trying to connect my Android client to Node JS server using Socket.IO. Connection is successful but I can't emit or listen to any data change.
Here is my Android code...
socket = IO.socket("http://192.168.0.101:3000");
socket.on(Socket.EVENT_CONNECT, new Emitter.Listener() {
#Override
public void call(Object... args) {
System.out.println("Connected");
socket.emit("message","test");
}
}).on("message", new Emitter.Listener() {
#Override
public void call(Object... args) {
System.out.println("Message : "+args[0]);
}
}).on(Socket.EVENT_DISCONNECT, new Emitter.Listener() {
#Override
public void call(Object... args) {
System.out.println("Socket disconnected");
}
}).on(Socket.EVENT_CONNECT_ERROR, new Emitter.Listener() {
#Override
public void call(Object... args) {
System.out.println("Error In Socket Connection "+args[0]);
}
});
socket.connect();
Socket is connecting to server perfectly. I'm getting the "connected" message in log. But that "message" event isn't working. What am I doing wrong? ;_;
You need to use OkHttp. Add this to your Gradle dependencies:
implementation("com.squareup.okhttp3:okhttp:4.8.1")
Then add this as a field in the activity or fragment class:
private var socket: Socket? = null
Then this is how you get your socket instance for example in onCreate() method of the activity or fragment:
val okHttpClient: OkHttpClient = OkHttpClient.Builder().build()
IO.setDefaultOkHttpWebSocketFactory(okHttpClient)
IO.setDefaultOkHttpCallFactory(okHttpClient)
val opts = IO.Options()
opts.apply {
callFactory = okHttpClient
webSocketFactory = okHttpClient
}
socket = try {
IO.socket("http://10.0.2.2:3000", opts)
} catch (e: URISyntaxException) {
null
}
(This code is written in kotlin language)
Then everything should work fine.
I need help with connect on android to my WebSocket server based on Spring boot. Source code of this server I have taken https://spring.io/guides/gs/messaging-stomp-websocket/
Everything works fine on server and browser client on this sample,
but if I use StompClient (https://github.com/NaikSoftware/StompProtocolAndroid) to connect on my socket I am getting mStompClient.isConnected() == false and conand mStompClient.send(...) doesn't send anything (?).
After few minutes socketweb server closes the connection and I get in my log: '~~ Stomp connection closed'.
Web server locates on Heroku cloud system.
There is my connecting code from android activity:
private StompClient mStompClient;
private void connectStomp(){
mStompClient = Stomp.over(WebSocket.class, "wss://myserver/gs-guide-websocket");
mStompClient.topic("/topic/greetings").subscribe(new Action1<StompMessage>() {
#Override
public void call(StompMessage stompMessage) {
Log.w(TAG, "== "+stompMessage.getPayload());
}
});
mStompClient.connect();
mStompClient.lifecycle().subscribe(new Action1<LifecycleEvent>() {
#Override
public void call(LifecycleEvent lifecycleEvent) {
switch (lifecycleEvent.getType()) {
case OPENED:
Log.w(TAG, "~~ Stomp connection opened");
break;
case ERROR:
Log.e(TAG, "~~ Error", lifecycleEvent.getException());
break;
case CLOSED:
Log.w(TAG, "~~ Stomp connection closed "+lifecycleEvent.getMessage());
break;
}
}
});
}
#Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_maps);
connectStomp();
}
// Send test request to server
public void onSend(View view){
Log.w(TAG,"onSend: click");
mStompClient.send("/app/hello","Test").subscribe(new Observer<Void>() {
#Override
public void onCompleted() {
Log.w(TAG, "~~~~ onCompleted");
}
#Override
public void onError(Throwable e) {
Log.w(TAG, "~~~~ onCompleted "+e.getMessage());
}
#Override
public void onNext(Void aVoid) {
Log.w(TAG, "~~~~ onNext ");
}
});
if (mStompClient.isConnected()){
mStompClient.send("/app/hello","test msg").subscribe();
Log.w("aaaa : ","onCreate: connected");
}
}
It would be my mistake but if I connect to my server socket with spring boot WebSocketStompClient everithing works fine:
private SockJsClient sockJsClient;
private WebSocketStompClient stompClient;
private final WebSocketHttpHeaders headers = new WebSocketHttpHeaders();
#Before
public void setup() {
List<Transport> transports = new ArrayList<>();
transports.add(new WebSocketTransport(new StandardWebSocketClient()));
this.sockJsClient = new SockJsClient(transports);
this.stompClient = new WebSocketStompClient(sockJsClient);
this.stompClient.setMessageConverter(new MappingJackson2MessageConverter());
}
#Test
public void getGreeting() throws Exception {
final CountDownLatch latch = new CountDownLatch(1);
final AtomicReference<Throwable> failure = new AtomicReference<>();
StompSessionHandler handler = new TestSessionHandler(failure) {
#Override
public void afterConnected(final StompSession session, StompHeaders connectedHeaders) {
session.subscribe("/topic/greetings", new StompFrameHandler() {
#Override
public Type getPayloadType(StompHeaders headers) {
return Greeting.class;
}
#Override
public void handleFrame(StompHeaders headers, Object payload) {
Greeting greeting = (Greeting) payload;
try {
System.out.println(greeting.getContent());
assertEquals("Hello, Spring!", greeting.getContent());
} catch (Throwable t) {
System.out.println(t.getMessage());
failure.set(t);
} finally {
session.disconnect();
latch.countDown();
}
}
});
try {
session.send("/app/hello", "Test");
} catch (Throwable t) {
failure.set(t);
latch.countDown();
}
}
};
this.stompClient.connect("wss://myserver/gs-guide-websocket", this.headers, handler, 443);
if (latch.await(10, TimeUnit.SECONDS)) {
if (failure.get() != null) {
throw new AssertionError("", failure.get());
}
}
else {
fail("Greeting not received");
}
}
private class TestSessionHandler extends StompSessionHandlerAdapter {
private final AtomicReference<Throwable> failure;
public TestSessionHandler(AtomicReference<Throwable> failure) {
this.failure = failure;
}
#Override
public void handleFrame(StompHeaders headers, Object payload) {
this.failure.set(new Exception(headers.toString()));
}
#Override
public void handleException(StompSession s, StompCommand c, StompHeaders h, byte[] p, Throwable ex) {
this.failure.set(ex);
}
Any ideas? Thanks a lot!
I used the same Library in order to connect with Stomp based web socket. There were some configurations on the server side. On the android side, I was using URL as starting with "ws://" and ending with "websocket" like "ws://" + SERVER_URL + "/websocket".
See this answer for server side https://stackoverflow.com/a/41751897/5392825
I have a Java EE Endpoint set up on a Payara server to which I attempt to connect an Android client using Autobahn WebSockets. I have the following setup:
My WebSocket Endpoint on the server:
public class CommunicationSocket extends Endpoint {
#Override
public void onOpen(Session aSession, EndpointConfig aConfig) {
aSession.addMessageHandler(new MessageHandler.Whole<byte[]>() {
#Override
public void onMessage(byte[] aMessage) {
// Do something fun
}
});
}
}
I register the WebSocket as such:
public class RegisterSocket implements ServerApplicationConfig {
#Override
public Set<ServerEndpointConfig> getEndpointConfigs(
Set<Class<? extends Endpoint>> aEndpointClasses) {
Set<ServerEndpointConfig> result = new HashSet<>();
for (Class endpointClass : aEndpointClasses) {
if (endpointClass.equals(CommunicationSocket.class)) {
ServerEndpointConfig sec
= ServerEndpointConfig.Builder.create(endpointClass,
"/WebSocket").build();
result.add(sec);
}
}
return result;
}
#Override
public Set<Class<?>> getAnnotatedEndpointClasses(
Set<Class<?>> aScanned) {
return Collections.emptySet();
}
}
The WebSocket can now be reached att ws://localhost:46588/Server/WebSocket. I've confirmed that it works with the following javascript in chrome:
function WebSocketTest() {
if ("WebSocket" in window) {
ws = new WebSocket("ws://localhost:46588/Server/WebSocket");
ws.onopen = function() {
ws.send("Message to send");
alert("Message is sent...");
};
ws.onmessage = function (evt) {
var received_msg = evt.data;
alert("Message is received... \n" + received_msg);
};
} else {
// The browser doesn't support WebSocket
alert("WebSocket NOT supported by your Browser!");
}
}
However when I try to connect with my android client using autobahn, the socket closes without being able to establish a connection with the message "Connection refused". I use the following code in onCreate to connect (mSocket is a field of the activity class):
WebSocketHandler messageHandler = new WebSocketHandler() {
#Override
public void onOpen() {
System.out.println("Connected...");
}
#Override
public void onClose(int code, String reason) {
System.out.println("Socket closing: " + reason);
mSocket = null;
}
#Override
public void onTextMessage(String payload) {
System.out.println("Received: " + payload);
}
#Override
public void onBinaryMessage(byte[] payload) {
System.out.println("Message received: " + payload);
}
};
mSocket = new WebSocketConnection();
try {
String address = "ws://localhost:46588/Server/WebSocket";
mSocket.connect(address, messageHandler);
} catch (WebSocketException e) {
System.out.println("Could not connect to WebSocket: "
+ e.getMessage());
mSocket = null;
}
I have internet permissions i my manifest as so:
<uses-permission android:name="android.permission.INTERNET">
</uses-permission>
Is there anything in my code or approach that is wrong? Is it possible to log/catch the event of connecting (handshake or what not) in order to shed light onto why the connection is refused?
And as I got ready to post the question I googled one last time: lo and behold, localhost is not the localhost of the machine running the emulator (I guess it's the localhost of the emulated device). So use:
10.0.2.2:[port]
instead of
localhost:[port]
and it will be fine on the emulator (don't forget to change if running on an actual device)
I was trying to fetch facebook friends and send message using asmack library over XMPP.I took reference from this site for facebook messaging.But after executing the code below i got exception.
public class MyActivity extends Activity {
public int state = 0;
private static final String TAG = "MyActivity";
/** Called when the activity is first created. */
#Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
new Thread(new Runnable() {
public void run() {
//XMPPConnection xmpp = new XMPPConnection("jabber.iitsp.com");
XMPPConnection xmpp = new XMPPConnection("chat.facebook.com");
try {
xmpp.connect();
// for other jabber accounts, truncate after the #
//xmpp.login("username", "password");
// for gtalk / gmail, include the #
xmpp.login("fb-username#chat.facebook.com", "your-fb-password");
} catch (XMPPException e) {
Log.v(TAG, "Failed to connect to " + xmpp.getHost());
e.printStackTrace();
}
ChatManager chatmanager = xmpp.getChatManager();
Chat newChat = chatmanager.createChat("friend#chat.facebook.com", new MessageListener() {
// THIS CODE NEVER GETS CALLED FOR SOME REASON
public void processMessage(Chat chat, Message message) {
try {
Log.v(TAG, "Got:" + message.getBody());
chat.sendMessage(message.getBody());
} catch (XMPPException e) {
Log.v(TAG, "Couldn't respond:" + e);
}
Log.v(TAG, message.toString());
}
});
// Send something to friend#chat.facebook.com
try {
newChat.sendMessage("my message");
} catch (XMPPException e) {
Log.v(TAG, "couldn't send:" + e.toString());
}
// Accept only messages from friend#chat.facebook.com
PacketFilter filter
= new AndFilter(new PacketTypeFilter(Message.class),
new FromContainsFilter("friend#chat.facebook.com"));
// Collect these messages
PacketCollector collector = xmpp.createPacketCollector(filter);
while(true) {
Packet packet = collector.nextResult();
if (packet instanceof Message) {
Message msg = (Message) packet;
// Process message
Log.v(TAG, "Got message:" + msg.getBody());
}
}
}
}).start();
//setContentView(this);
}}
I got following errors during execution of the code:-
1) java.security.KeyStoreException: java.security.NoSuchAlgorithmException: KeyStore jks implementation not found
2) SASL authentication failed using mechanism PLAIN:
Then my program crashed
java.lang.IllegalStateException: Not connected to server.
Any help would be appreciated.
I'm new to Jerry, and trying to implement WebSocket Client on Jetty9.
I saw an example on Jetty8.
org.eclipse.jetty.websocket Class WebSocketClient
http://archive.eclipse.org/jetty/8.0.0.v20110901/apidocs/org/eclipse/jetty/websocket/WebSocketClient.html
to create a new instance of WebSocketClient is :
WebSocketClientFactory factory = new WebSocketClientFactory();
factory.start();
WebSocketClient client = factory.newWebSocketClient();
// Configure the client
WebSocket.Connection connection = client.open(new
URI("ws://127.0.0.1:8080/"), new WebSocket.OnTextMessage()
{
public void onOpen(Connection connection)
{
// open notification
}
public void onClose(int closeCode, String message)
{
// close notification
}
public void onMessage(String data)
{
// handle incoming message
}
}).get(5, TimeUnit.SECONDS);
connection.sendMessage("Hello World");
However, I've never seen a document for Jetty9 for this.
So far, referring to
org.eclipse.jetty.websocket.common
Interface SessionFactory
//----------------------------------------------
WebSocketSession createSession(URI requestURI,
EventDriver websocket,
LogicalConnection connection)
//----------------------------------------------
I've tried
private WebSocketSessionFactory factory = new WebSocketSessionFactory();
try
{
WebSocketSession session = factory.createSession(uri,
eventDriver, connection);
RemoteEndpoint ep = session.getRemote();
}
catch (Exception ex)
{
System.out.println("=ERROR= " + ex);
//=ERROR= java.lang.NullPointerException
}
private EventDriver eventDriver = new EventDriver()
{
#Override
public WebSocketPolicy getPolicy()
{
return null;
}
//......................................
#Override
public void incomingFrame(Frame frame)
{
}
};
private LogicalConnection connection = new LogicalConnection()
{
#Override
public void close()
{
}
//...............................
#Override
public void resume()
{
}
};
but I've encounter java.lang.NullPointerException
How do we implement Jetty9 WebSocket Client ??
Thanks for your advise.
Hope this helpful: EventClient.java