Sending data to server node.js / socket.io from JAVA
I am trying to send a message to my node.js / socket.io server via Java
Here is the code I am using to send the message
import java.io.OutputStreamWriter;
import java.net.HttpURLConnection;
import java.net.URL;
class socketMessage {
public socketMessage() {
}
public static void send(String string) throws Exception {
System.out.println("Sending message to Socket Server!");
URL url = new URL("http://<mysite>:8000");
HttpURLConnection conn = (HttpURLConnection) url.openConnection();
conn.setRequestMethod("POST");
conn.setDoOutput(true);
try (OutputStreamWriter writer = new OutputStreamWriter(conn.getOutputStream())) {
System.out.println("Data Sent!");
writer.write(string);
writer.flush();
}
conn.getResponseCode(); // Thanks to BGR
}
}
callable with: socketMessage.send("Admin|notification|Logged in elsewhere\n> Official Java App");
and here is the server code:
var http = require("http");
var io = require('socket.io');
var sessionsConnections = {};
var whereIsUserVisitingFrom = {};
console.log("\n\n-------------------------------- Server Started --------------------------------");
var server = http.createServer(function(req, res){
var body = '';
req.on('data', function(data){
console.log('Received Data');
body += data;
});
req.on('end', function() {
// Emit the data to all clients
ioServer.emit('message', { message: body });
});
});
server.listen(8000);
var ioServer = io.listen(server, { log: false });
ioServer.on('connection', function(socket) {
var currentUser;
var parts;
socket.on('started', function(data) {
currentUser = data.username;
sessionsConnections[currentUser] = socket.id;
whereIsUserVisitingFrom[currentUser] = data.from;
socket.emit("connected", { message: "Welcome, " + currentUser + "!" });
socket.broadcast.emit("updateUsers", { message: sessionsConnections, from: whereIsUserVisitingFrom });
socket.emit("updateUsers", { message: sessionsConnections, from: whereIsUserVisitingFrom });
});
socket.on('message', function(data) {
var parts = data.message.split("|");
socket.broadcast.emit("updateUsers", { message: sessionsConnections, from: whereIsUserVisitingFrom });
socket.emit("updateUsers", { message: sessionsConnections, from: whereIsUserVisitingFrom });
console.log("Message Recieved!");
if( parts[0] == "*" ) {
socket.broadcast.emit("display", { message: data.message });
}else{
if( parts[0] in sessionsConnections ) {
io.sockets.socket(sessionsConnections[parts[0]]).emit("display", { message: data.message });
}else{
socket.emit("display", { message: "That user is not online!" });
}
}
});
socket.on('disconnect', function() {
delete sessionsConnections[currentUser];
socket.broadcast.emit("updateUsers", { message: sessionsConnections, from: whereIsUserVisitingFrom });
socket.emit("updateUsers", { message: sessionsConnections, from: whereIsUserVisitingFrom });
});
});
basically what my server is doing at the moment when I'm on my website and then send a command from my admin center in the form "{user} | {action (ie notification)} | {text / extra_param (s )} "it will send a message to the client you specified as {user} and then I have client side code that breaks this message apart and changes the UI accordingly, but I also want to do this from my Java application, and he does not work: (
any ideas
Vini
Thank you in advance
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After adding
conn.getResponseCode()
still doesn't work. Finally, I found socket.io-java-client exactly what we needed. Since socket.io doesn't use the original websocket you are using but add protocl on it and your "data" code will never fire.
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