從JAVA向node.js / socket.io服務器發送數據

Question

我試圖通過Java向我的node.js / socket.io服務器發送消息

這是我用來發送消息的代碼

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
    }
}

調用： socketMessage.send("Admin|notification|Logged in elsewhere\\n> Official Java App");

這是服務器代碼：

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 });
    });

});

基本上當我訪問我的網站時，我的服務器當前所做的是什么，然后以“{user} | {action（ie notification）} | {text / extra_param（s）}”的形式從我的管理中心發送命令“它將發送向您設置為{user}的客戶端發送消息，然后我在客戶端將代碼拆分為部分並相應地更改網站UI，但我也希望從我的Java應用程序執行此操作，並且不工作:(

有任何想法嗎

溫尼

提前致謝

Answer 1

要完成HTTP連接，必須讀取HTTP響應。

在try塊之后插入conn.getResponseCode()

Answer 2

添加后

conn.getResponseCode()

仍然沒有使這項工作。 最后我發現socket.io-java-client正是我們所需要的。因為socket.io不使用你使用的原始websocket但是在它上面添加了一個protocl，你的代碼“data”事件永遠不會被觸發。