要将某些内容发送给所有客户端，请使用：
io.sockets.emit('response', data);
要从客户那里接收，您使用：
socket.on('cursor', function(data) {
...
});
如何将两者结合起来，以便在服务器上从客户端接收消息时，将该消息发送给除发送消息的用户之外的所有用户？
socket.on('cursor', function(data) {
io.sockets.emit('response', data);
});
我是否必须通过发送带有消息的客户端 ID 然后检查客户端来破解它，还是有更简单的方法？
这是我的清单（针对 1.0 更新）：
// sending to sender-client only
socket.emit('message', "this is a test");
// sending to all clients, include sender
io.emit('message', "this is a test");
// sending to all clients except sender
socket.broadcast.emit('message', "this is a test");
// sending to all clients in 'game' room(channel) except sender
socket.broadcast.to('game').emit('message', 'nice game');
// sending to all clients in 'game' room(channel), include sender
io.in('game').emit('message', 'cool game');
// sending to sender client, only if they are in 'game' room(channel)
socket.to('game').emit('message', 'enjoy the game');
// sending to all clients in namespace 'myNamespace', include sender
io.of('myNamespace').emit('message', 'gg');
// sending to individual socketid
socket.broadcast.to(socketid).emit('message', 'for your eyes only');
// list socketid
for (var socketid in io.sockets.sockets) {}
OR
Object.keys(io.sockets.sockets).forEach((socketid) => {});
来自@LearnRPG 的答案，但使用 1.0：
// send to current request socket client
socket.emit('message', "this is a test");
// sending to all clients, include sender
io.sockets.emit('message', "this is a test"); //still works
//or
io.emit('message', 'this is a test');
// sending to all clients except sender
socket.broadcast.emit('message', "this is a test");
// sending to all clients in 'game' room(channel) except sender
socket.broadcast.to('game').emit('message', 'nice game');
// sending to all clients in 'game' room(channel), include sender
// docs says "simply use to or in when broadcasting or emitting"
io.in('game').emit('message', 'cool game');
// sending to individual socketid, socketid is like a room
socket.broadcast.to(socketid).emit('message', 'for your eyes only');
要回答@Crashalot 评论，socketid来自：
var io = require('socket.io')(server);
io.on('connection', function(socket) { console.log(socket.id); })
这是关于从 0.9.x 到 1.x 发生了什么变化的更完整的答案。
// send to current request socket client
socket.emit('message', "this is a test");// Hasn't changed
// sending to all clients, include sender
io.sockets.emit('message', "this is a test"); // Old way, still compatible
io.emit('message', 'this is a test');// New way, works only in 1.x
// sending to all clients except sender
socket.broadcast.emit('message', "this is a test");// Hasn't changed
// sending to all clients in 'game' room(channel) except sender
socket.broadcast.to('game').emit('message', 'nice game');// Hasn't changed
// sending to all clients in 'game' room(channel), include sender
io.sockets.in('game').emit('message', 'cool game');// Old way, DOES NOT WORK ANYMORE
io.in('game').emit('message', 'cool game');// New way
io.to('game').emit('message', 'cool game');// New way, "in" or "to" are the exact same: "And then simply use to or in (they are the same) when broadcasting or emitting:" from http://socket.io/docs/rooms-and-namespaces/
// sending to individual socketid, socketid is like a room
io.sockets.socket(socketid).emit('message', 'for your eyes only');// Old way, DOES NOT WORK ANYMORE
socket.broadcast.to(socketid).emit('message', 'for your eyes only');// New way
我想编辑@soyuka 的帖子，但我的编辑被同行评审拒绝了。
io.on('connect', onConnect);
function onConnect(socket){
// sending to the client
socket.emit('hello', 'can you hear me?', 1, 2, 'abc');
// sending to all clients except sender
socket.broadcast.emit('broadcast', 'hello friends!');
// sending to all clients in 'game' room except sender
socket.to('game').emit('nice game', "let's play a game");
// sending to all clients in 'game1' and/or in 'game2' room, except sender
socket.to('game1').to('game2').emit('nice game', "let's play a game (too)");
// sending to all clients in 'game' room, including sender
io.in('game').emit('big-announcement', 'the game will start soon');
// sending to all clients in namespace 'myNamespace', including sender
io.of('myNamespace').emit('bigger-announcement', 'the tournament will start soon');
// sending to individual socketid (private message)
socket.to(<socketid>).emit('hey', 'I just met you');
// sending with acknowledgement
socket.emit('question', 'do you think so?', function (answer) {});
// sending without compression
socket.compress(false).emit('uncompressed', "that's rough");
// sending a message that might be dropped if the client is not ready to receive messages
socket.volatile.emit('maybe', 'do you really need it?');
// sending to all clients on this node (when using multiple nodes)
io.local.emit('hi', 'my lovely babies');
};
broadcast.emit 将 msg 发送给所有其他客户端（发送者除外）
socket.on('cursor', function(data) {
socket.broadcast.emit('msg', data);
});
For namespaces within rooms looping the list of clients in a room (similar to Nav's answer) is one of only two approaches I've found that will work. The other is to use exclude. E.G.
socket.on('message',function(data) {
io.of( 'namespace' ).in( data.roomID ).except( socket.id ).emit('message',data);
}
其他案例
io.of('/chat').on('connection', function (socket) {
//sending to all clients in 'room' and you
io.of('/chat').in('room').emit('message', "data");
};
socket.broadcast.emit(/* ... */);
示例用法
io.on("connection", (socket) => {
socket.on("message", (message) => {
//sends "newMessage" to all sockets except sender
socket.broadcast.emit("newMessage", message)
})
})
更新了列表以获取更多文档。
socket.emit('message', "this is a test"); //sending to sender-client only
socket.broadcast.emit('message', "this is a test"); //sending to all clients except sender
socket.broadcast.to('game').emit('message', 'nice game'); //sending to all clients in 'game' room(channel) except sender
socket.to('game').emit('message', 'enjoy the game'); //sending to sender client, only if they are in 'game' room(channel)
socket.broadcast.to(socketid).emit('message', 'for your eyes only'); //sending to individual socketid
io.emit('message', "this is a test"); //sending to all clients, include sender
io.in('game').emit('message', 'cool game'); //sending to all clients in 'game' room(channel), include sender
io.of('myNamespace').emit('message', 'gg'); //sending to all clients in namespace 'myNamespace', include sender
socket.emit(); //send to all connected clients
socket.broadcast.emit(); //send to all connected clients except the one that sent the message
socket.on(); //event listener, can be called on client to execute on server
io.sockets.socket(); //for emiting to specific clients
io.sockets.emit(); //send to all connected clients (same as socket.emit)
io.sockets.on() ; //initial connection from a client.
希望这可以帮助。
io.on("connection", (socket) => {
// basic emit
socket.emit(/* ... */);
// to all clients in the current namespace except the sender
socket.broadcast.emit(/* ... */);
// to all clients in room1 except the sender
socket.to("room1").emit(/* ... */);
// to all clients in room1 and/or room2 except the sender
socket.to(["room1", "room2"]).emit(/* ... */);
// to all clients in room1
io.in("room1").emit(/* ... */);
// to all clients in room1 and/or room2 except those in room3
io.to(["room1", "room2"]).except("room3").emit(/* ... */);
// to all clients in namespace "myNamespace"
io.of("myNamespace").emit(/* ... */);
// to all clients in room1 in namespace "myNamespace"
io.of("myNamespace").to("room1").emit(/* ... */);
// to individual socketid (private message)
io.to(socketId).emit(/* ... */);
// to all clients on this node (when using multiple nodes)
io.local.emit(/* ... */);
// to all connected clients
io.emit(/* ... */);
// WARNING: `socket.to(socket.id).emit()` will NOT work, as it will send to everyone in the room
// named `socket.id` but the sender. Please use the classic `socket.emit()` instead.
// with acknowledgement
socket.emit("question", (answer) => {
// ...
});
// without compression
socket.compress(false).emit(/* ... */);
// a message that might be dropped if the low-level transport is not writable
socket.volatile.emit(/* ... */);
});
// basic emit
socket.emit(/* ... */);
// with acknowledgement
socket.emit("question", (answer) => {
// ...
});
// without compression
socket.compress(false).emit(/* ... */);
// a message that might be dropped if the low-level transport is not writable
socket.volatile.emit(/* ... */);
存档链接到源 => http://archive.today/2021.06.22-023900/https://socket.io/docs/v4/emit-cheatsheet/index.html
使用这个编码
io.sockets.on('connection', function (socket) {
socket.on('mousemove', function (data) {
socket.broadcast.emit('moving', data);
});
这个 socket.broadcast.emit() 将在函数中发出任何东西，除了正在发出的服务器
我正在使用命名空间和房间 - 我发现
socket.broadcast.to('room1').emit('event', 'hi');
在哪里工作
namespace.broadcast.to('room1').emit('event', 'hi');
没有
（如果其他人面临这个问题）