访问socket.io中socket.on（'connection'）内的其他套接字

Question

I'm new with node.js and socket.io.

How to access other socket inside socket.on('connection') ? Here is my server side code:

server side index.js :

io.sockets.on("connection", function (socket) {

    socket.on("tree", function(fruit){
        var fruit = "strawberry";
        console.log(fruit); // result: strawberry
    });

    socket.on("drink", function(juice){
        //How to access var fruit here? (strawberry)
    });

};

Thank you for any help..

Answer 1

If you want some data (such as the avatar) to be available for future events after it is received, then you have to save that data somewhere in your server and save it in a way that you know which piece of data goes with which connection.

There are a zillion ways to structure that from saving it to a property on the socket, to saving it a map of username --> userdata to saving it in a database. The general idea is that you save it somewhere when you receive it so that however you want to retrieve the data in the future for use in some future events, you can find it in that data structure or database.

From your code example:

io.sockets.on("connection", function (socket) {

    var savedFruit;
    socket.on("tree", function(fruit){
        savedFruit = fruit;
        console.log(fruit); // result: strawberry
    });

    socket.on("drink", function(juice){
        // You can access the savedFruit variable here which will only have a
        // value if the "tree" message has already been received.
    });

});