jschan is a JavaScript port of libchan based around node streams
The jschan API should be stable at this point, but libchan is a developing standard and there may be breaking changes in future.
When used over the standard SPDY transport, jschan is compatible with the current Go reference implementation.
We also have a websocket transport to allow us to run jschan on the browser. This feature is not covered by the spec, and is not compatible with other implementations.
npm install jschan-spdy --saveThis example exposes a service over SPDY. It is built to be interoperable with the original libchan version rexec.
The server opens up a jschan server to accept new sessions, and then execute the requests that comes through the channel.
'use strict';
var jschan = require('jschan');
var childProcess = require('child_process');
var server = require('jschan-spdy').server;
server.listen(9323);
function handleReq(req) {
var child = childProcess.spawn(
req.Cmd,
req.Args,
{
stdio: [
'pipe',
'pipe',
'pipe'
]
}
);
req.Stdin.pipe(child.stdin);
child.stdout.pipe(req.Stdout);
child.stderr.pipe(req.Stderr);
child.on('exit', function(status) {
req.StatusChan.write({ Status: status });
});
}
function handleChannel(channel) {
channel.on('data', handleReq);
}
function handleSession(session) {
session.on('channel', handleChannel);
}
server.on('session', handleSession);'use strict';
var usage = process.argv[0] + ' ' + process.argv[1] + ' command <args..>';
if (!process.argv[2]) {
console.log(usage)
process.exit(1)
}
var jschan = require('jschan');
var session = require('jschan-spdy').clientSession({ port: 9323 });
var sender = session.WriteChannel();
var cmd = {
Args: process.argv.slice(3),
Cmd: process.argv[2],
StatusChan: sender.ReadChannel(),
Stderr: process.stderr,
Stdout: process.stdout,
Stdin: process.stdin
};
sender.write(cmd);
cmd.StatusChan.on('data', function(data) {
sender.end();
setTimeout(function() {
console.log('ended with status', data.Status);
process.exit(data.Status);
}, 500);
})MIT