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/**
* Primus transport. This allows messages to be sent over {@link https://github.com/primus/primus|Primus} connections.
*
* @module centro-js/lib/server_transports/primus
* @param {Object} config - Configuration options. This supports all the options supported by `Primus.createServer` and {@link https://github.com/davedoesdev/primus-backpressure#primusduplexmsg_stream-options|PrimusDuplex} as well as the following:
* @param {Primus} [config.server] - If you want to supply your own Primus server object. Otherwise, `Primus.createServer` will be called to create one.
* @param {string} [config.pathname=/centro/v2/primus] - Pathname prefix on which Primus listens for connections.
* @param {Object} [config.primus_transport] - Primus transformer-specific configuration.
* @param {Object} [config.primus] - If present then this is used in preference to `config`.
*/
"use strict";
var centro = require('../..'),
Primus = require('primus'),
PrimusDuplex = require('primus-backpressure').PrimusDuplex,
on_connection = require('./http').on_connection;
module.exports = function (config, authorize, connected, ready, error, warning)
{
config = config.primus || config;
var server = config.server || Primus.createServer(
Object.assign(
{
pathname: '/centro/v' + centro.version + '/primus',
maxLength: 1 * 1024 * 1024
}, config, { transport: config.primus_transport }));
function onclose(req, cb)
{
if (req.socket.destroyed)
{
return cb();
}
req.socket.on('close', cb);
}
server.authorize(function (req, cb)
{
authorize(req, function ()
{
cb({ statusCode: 503, message: 'closed' });
}, function (cb)
{
onclose(req, cb);
}, function (err, handshakes)
{
if (err)
{
return cb(err);
}
req.handshakes = handshakes;
cb();
});
});
function connection(spark)
{
connected(spark.request.handshakes,
new PrimusDuplex(spark, Object.assign(
{
allowHalfOpen: false
}, config)),
function ()
{
spark.request.socket.destroy();
spark.end();
},
function (cb)
{
onclose(spark.request, cb);
});
}
server.on('connection', connection);
server.on('error', error);
const on_conn = on_connection.bind(server.server, warning);
server.server.prependListener('connection', on_conn);
server.server.prependListener('secureConnection', on_conn);
function on_upgrade(req, socket)
{
on_connection.call(this, warning, socket);
}
server.server.prependListener('upgrade', on_upgrade);
function initialised()
{
ready(null,
{
close: function (cb)
{
server.auth = null;
server.removeListener('connection', connection);
server.removeListener('error', error);
server.server.removeListener('connection', on_conn);
server.server.removeListener('secureConnection', on_conn);
server.server.removeListener('upgrade', on_upgrade);
if (config.server)
{
return cb();
}
server.destroy(config, cb);
},
server: server
});
}
if (config.server)
{
return initialised();
}
server.on('initialised', initialised);
};
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