Sails.js + socket.io:从服务器向客户端发送消息 [英] Sails.js + socket.io: Sending messages from server to clients

问题描述

我正在尝试使用sails.js 设置一个系统，让服务器向一组客户端广播消息.基本上:

I'm attempting to set up a system with sails.js to have the server broadcast messages to a set of clients. Basically:

1. A 组中的客户端向服务器发送 AJAX 请求.
2. 服务器处理请求并通过套接字向 B 组的所有客户端发送消息.
3. B 组的客户端通过套接字接收消息并显示一些内容.

根据 socket.io 文档，我应该能够让 B 组中的客户端加入房间"，然后让服务器广播到该特定房间，但在客户端，预先存在的套接字"没有方法socket.join('room')".所以，我尝试只向所有客户端发送一个独特的事件:

According to the socket.io documentation, I should be able to have the clients in Group B join a "room", and then have the server broadcast to that specific room, but on the client side, the preexisting "socket" doesn't have the method "socket.join('room')". So, I tried just sending a unique event to all clients:

socket.on("connect", function(){
  console.log("Client Connected");
});

socket.on("my_event", function(data){
  console.log("my_event received");
});

通过在服务器端执行 "sails.io.sockets.emit("my_event", {...})" 可以很好地工作，但这不是将事件发送给每个客户端吗?我可以使事件名称唯一，例如my_event_000"，带有一个 ID 来指定组，但这仍然会不必要地向每个客户端发送事件.

This works fine by doing "sails.io.sockets.emit("my_event", {...})" on the server side, but isn't this sending the event to every single client? I could make the event name unique, something like "my_event_000" with an ID to specify the group, but that would still be sending events to every client unnecessarily.

我应该使用房间"吗?如果是这样，如何?

Should I be using "rooms"? And if so, how?

推荐答案

Sails 实现此目的的方法是让模型支持您的组"，并在控制器操作中让套接字订阅带有 Group.subscribe(groupId, req.socket).然后，您可以使用 Group.publish(groupId, data) 向特定组发送消息.

The Sails way to do this would be to have a model backing your "Groups", and in a controller action have a socket subscribe to a group with Group.subscribe(groupId, req.socket). Then you can send messages to a specific group with Group.publish(groupId, data).

您还可以使用 req.listen(groupId) 在控制器中订阅任意房间名称，并使用 req.broadcast(roomName, data) 广播到该房间>.

You can also subscribe to an arbitrary room name in a controller using req.listen(groupId), and broadcast to that room with req.broadcast(roomName, data).

这都在 有关使用套接字的 Sails 文档!

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