metaapi.cloud-sdk
Version:
SDK for MetaApi, a professional cloud forex API which includes MetaTrader REST API and MetaTrader websocket API. Supports both MetaTrader 5 (MT5) and MetaTrader 4 (MT4). CopyFactory copy trading API included. (https://metaapi.cloud)
47 lines (46 loc) • 6.09 kB
JavaScript
/**
* Returns socket sticky session ID
* @param socket native socket.io socket
* @returns sticky session ID
*/ export function getSocketStickySessionId(socket) {
return socket.handshake.query['stickySocketConnectionId'] || socket.id; // eslint-disable-line dot-notation
}
/**
* Returns whether a socket supports sticky socket protocol
* @param socket native socket.io socket
* @returns whether supports the protocol
*/ export function supportsStickySocketProtocol(socket) {
return !!socket.handshake.query['stickySocketConnectionId']; // eslint-disable-line dot-notation
}
/**
* Returns client socket.io socket transport
* @param socket native socket.io socket
* @returns current transport name
*/ export function getClientSocketIoTransportName(socket) {
return socket.io.engine.transport.name;
}
/**
* Destroys underlying socket of a client socket, using socket.io internals. The socket must have `websocket` transport
* @param socket native socket.io socket
* @param err optional error
*/ export function destroyInternalClientSocket(socket, err) {
socket.io.engine.transport.ws._socket.destroy(err);
}
/**
* Sends history events to a socket
* @param socket socket to send to
* @param history history to send from (will be modified)
* @param startIndex start packet index to stream from
*/ export function sendHistory(socket, history, startIndex) {
while(history.length && history.front().index < startIndex){
history.shift();
}
for (let packet of history){
packet.time = new Date();
socket.emit(packet.event, {
index: packet.index,
data: packet.data
});
}
}
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