Whether to allow transport upgrades (engine.io)
Name of the HTTP cookie that contains the client sid to send as part of handshake response headers. Set to false to not send one (engine.io)
Parameters of the http compression for the polling transports (see zlib). Set to false to disable, or set an object with parameter "threshold:number" to only compress data if the byte size is above this value (1024) (engine.io)
How many bytes or characters a message can be when polling, before closing the session (to avoid Dos) (engine.io)
Accepted origins
The path to server the client file to
parameters of the WebSocket permessage-deflate extension (see ws module). Set to false to disable (engine.io)
How many milliseconds before sending a new ping packet (keep-alive) (engine.io)
How many milliseconds without a pong packed to consider the connection closed (engine.io)
Should we serve the client file?
Transports to allow connections to (engine.io)
A function that receives a given handshake or upgrade request as its first parameter, and can decide whether to continue or not. The second argument is a function that needs to be called with the decided information: fn( err, success ), where success is a boolean value where false means that the request is rejected, and err is an error code (engine.io)
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