node.js socket.io 如何发送到特定客户端？
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node.js socket.io How to emit to a particular client?
提问by srinathhs
I want to "emit" a message to a particular client which is selected based on another message received in a different client, How do I do this?
我想向特定客户端“发送”一条消息，该消息是根据在不同客户端收到的另一条消息而选择的，我该怎么做？
I am thinking of joining each client to their own "room" and then broadcast. Is there a better way?
我正在考虑将每个客户加入他们自己的“房间”然后进行广播。有没有更好的办法？
回答by Francesco Laurita
UPDATE for socket.io version 1.0 and above
socket.io 1.0 及以上版本的更新
io.to(socketid).emit('message', 'whatever');
For older version:
对于旧版本：
You can store each client in an object as a property. Then you can lookup the socket based on the message:
您可以将每个客户端作为属性存储在一个对象中。然后您可以根据消息查找套接字：
var basket = {};
io.sockets.on('connection', function (socket) {
socket.on("register", function(data) {
basket[data.nickname] = socket.id;
});
socket.on("privmessage", function(data){
var to = basket[data.to];
io.sockets.socket(to).emit(data.msg);
});
});
Not tested...but it should give you an idea
未测试......但它应该给你一个想法
回答by Minho Lee
For socket.io version 1.0 use:
对于 socket.io 1.0 版使用：
io.to(socketid).emit('message', 'whatever');
回答by Willem van der Veen
Emitting to a particular client using a socketID.
使用 socketID 发送到特定客户端。
Server/ package: socket.io:
服务器/包：socket.io：
io.to(socketID).emit('testEvent', 'yourMessage');
Client/ package socket.io-client:
客户端/包 socket.io-client:
io.sockets.on('connection',(socket) => {
socket.on("testEvent", data => {
console.log(data);
});
});
You can get access the socketID in the following manner:
您可以通过以下方式访问 socketID：
io.on('connection', (socket, next) => {
const ID = socket.id // id property on the socket Object
})
It is simply a property on the socketobject
它只是socket对象上的一个属性
回答by Michael Pigle
For socket.io v1.0< use:
对于 socket.io v1.0< 使用：
io.to(socketID).emit('testEvent', 'yourMessage');
io.to(socketID).emit('testEvent', 'yourMessage');
