Contents
What is Socket handshake?
The handshake in Socket.IO is like any other information technology related handshake. It is the process of negotiation, which in Socket. IO’s case, decides whether a client may connect, and if not, denies the connection.
Is Socket.IO multithreaded?
No, it’s not multithreaded.
Does Socket.IO use long polling?
The bidirectional channel between the Socket.IO server (Node. js) and the Socket.IO client (browser, Node. js, or another programming language) is established with a WebSocket connection whenever possible, and will use HTTP long-polling as fallback.
How do I connect to a Socket.IO server?
listen(port); // Create a Socket.IO instance, passing it our server var socket = io. listen(server); // Add a connect listener socket. on(‘connection’, function(client){ console. log(‘Connection to client established’); // Success!
How many users can Socket.IO handle?
Because Websockets are built on top of TCP, my understanding is that unless ports are shared between connections you are going to be bound by the 64K port limit. But I’ve also seen reports of 512K connections using Gretty.
What is the handshake process in Socket.IO?
The handshake in Socket.IO is like any other information technology related handshake. It is the process of negotiation, which in Socket.IO’s case, decides whether a client may connect, and if not, denies the connection.
Authorization in Socket.IO is run through a function which is decided in a boolean that is passed by a callback. This function runs every time a connection attempts a handshake, and this is what it looks like:
How to use middleware in Socket.IO 1.0?
Edit: In Socket.IO 1.0, middleware is now used. Authorization can be done like so: If you were to need to reject the socket, just pass an error object to the next () callback. The same thing can be done with namespaces: Authorization in Socket.IO is run through a function which is decided in a boolean that is passed by a callback.
Can a handshake be initiated with a JSONP request?
The handshake is initiated with either a XHR or JSONP request, and doesn’t do much when no authorization is specified, but can be helpful in the data passed in the handshake data object. To answer your last question, yes, you may add anything into the handshake object.