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server: make sure client id are released when unused

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When clients disconnect, their tcp server should be shutdown and the id
released after a grace period.
This commit is contained in:
Roman Shtylman
2012-11-14 13:53:33 -05:00
parent b5830c3840
commit b605e9b823
2 changed files with 34 additions and 12 deletions
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42
server.js
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@@ -309,6 +309,11 @@ server.on('request', function(req, res) {
var id = requested_id || rand_id();
// if the id already exists, this client must use something else
if (clients[id]) {
id = rand_id();
}
// maximum number of tcp connections the client can setup
// each tcp channel allows for more parallel requests
var max_tcp_sockets = 4;
@@ -336,48 +341,61 @@ server.on('request', function(req, res) {
}));
});
var conn_timeout;
// user has 5 seconds to connect before their slot is given up
var conn_timeout = setTimeout(function() {
client_server.close();
}, 5000);
function maybe_tcp_close() {
conn_timeout = setTimeout(function() {
client_server.close();
}, 5000);
}
maybe_tcp_close();
// no longer accepting connections for this id
client_server.on('close', function() {
log.trace('closed tcp socket for client(%s)', id);
clearTimeout(conn_timeout);
delete clients[id];
});
var count = 0;
client_server.on('connection', function(socket) {
// no more socket connections allowed
if (count++ >= max_tcp_sockets) {
if (client.sockets.length >= max_tcp_sockets) {
return socket.end();
}
log.trace('new connection for id: %s', id);
// multiplexes socket data out to clients
socket.ondata = socketOnData;
// no need to close the client server
clearTimeout(conn_timeout);
// add socket to pool for this id
var idx = client.sockets.push(socket) - 1;
// multiplexes socket data out to clients
socket.ondata = socketOnData;
client.sockets.push(socket);
socket.on('close', function(had_error) {
count--;
log.trace('client %s closed socket', id);
// remove this socket
var idx = client.sockets.indexOf(socket);
client.sockets.splice(idx, 1);
log.trace('remaining client sockets: %s', client.sockets.length);
// no more sockets for this ident
if (client.sockets.length === 0) {
delete clients[id];
log.trace('all client(%s) sockets disconnected', id);
maybe_tcp_close();
}
});
// close will be emitted after this
socket.on('error', function(err) {
log.error(err);
socket.end();
});
});