isoterm
Version:
A Terminal With Precisely Configurable Fonts Using CSS Unicode Ranges
237 lines (184 loc) • 7.25 kB
JavaScript
(function() {
'use strict';
var CND, GUY, PATH, badge, debug, echo, express, expressWs, expressWs_path, get_abspath, help, info, log, os, paths, pty, pty_path, rpr, urge, warn, whisper, xterm_path;
//###########################################################################################################
CND = require('cnd');
rpr = CND.rpr;
badge = 'XXTERM/SERVER';
debug = CND.get_logger('debug', badge);
warn = CND.get_logger('warn', badge);
info = CND.get_logger('info', badge);
urge = CND.get_logger('urge', badge);
help = CND.get_logger('help', badge);
whisper = CND.get_logger('whisper', badge);
echo = CND.echo.bind(CND);
//...........................................................................................................
CND = require('cnd');
GUY = require('guy');
PATH = require('path');
xterm_path = PATH.resolve(PATH.join(__dirname, '../xterm'));
expressWs_path = require.resolve('express-ws', {
paths: [xterm_path]
});
pty_path = require.resolve('node-pty', {
paths: [xterm_path]
});
express = require('express');
expressWs = require(expressWs_path);
os = require('os');
pty = require(pty_path);
log = console.log;
//...........................................................................................................
get_abspath = function(...P) {
return PATH.resolve(PATH.join(...P));
};
paths = {};
paths.home = get_abspath(__dirname, '..');
paths.app = get_abspath(paths.home, 'app');
paths.static = get_abspath(paths.app, 'static');
paths.index_html = get_abspath(paths.app, 'index.html');
// Whether to use binary transport.
const USE_BINARY = os.platform() !== "win32";
/* ### NOTE: `XE` is a `datom/xemitter`` instance */
function startServer( XE ) {
return new Promise( ( resolve, reject ) => {
var app = express();
expressWs(app);
var terminals = {},
logs = {};
app.use('/xterm.css', express.static( get_abspath( paths.app, '/xterm.css' ) ) );
app.get('/logo.png', (req, res) => { // lgtm [js/missing-rate-limiting]
res.sendFile( get_abspath( paths.app, '/logo.png' ) );
});
app.get('/', (req, res) => { // lgtm [js/missing-rate-limiting]
res.sendFile( paths.index_html );
});
app.get('/test', (req, res) => { // lgtm [js/missing-rate-limiting]
res.sendFile( get_abspath( paths.app, '/test.html' ) );
});
app.get('/style.css', (req, res) => { // lgtm [js/missing-rate-limiting]
res.sendFile( get_abspath( paths.app, '/style.css' ) );
});
app.use( '/static', express.static( get_abspath( paths.app, '/static' ) ) );
app.use( '/fonts', express.static( get_abspath( paths.app, '/fonts' ) ) );
app.use( '/dist', express.static( get_abspath( paths.app, '/dist' ) ) );
app.use( '/src', express.static( get_abspath( paths.app, '/src' ) ) );
app.post('/terminals', (req, res) => {
const env = Object.assign({}, process.env);
env['COLORTERM'] = 'truecolor';
var cols = parseInt(req.query.cols),
rows = parseInt(req.query.rows),
term = pty.spawn(process.platform === 'win32' ? 'cmd.exe' : 'zsh', [], {
// term = pty.spawn(process.platform === 'win32' ? 'cmd.exe' : 'bash', [], {
name: 'xterm-256color',
cols: cols || 80,
rows: rows || 24,
cwd: process.platform === 'win32' ? undefined : env.PWD,
env: env,
encoding: USE_BINARY ? null : 'utf8'
});
log('^server.js@734-1^ URL: ' + req.protocol + '://' + req.host + req.originalUrl);
log('^server.js@734-1^ Created terminal with PID: ' + term.pid);
XE.emit( '^server/terminal/pid', { pid: term.pid, } );
terminals[term.pid] = term;
logs[term.pid] = '';
term.on('data', function(data) {
logs[term.pid] += data;
});
res.send(term.pid.toString());
res.end();
});
app.post('/terminals/:pid/size', (req, res) => {
log('^server.js@734-1^ URL: ' + req.protocol + '://' + req.host + req.originalUrl);
var pid = parseInt(req.params.pid),
cols = parseInt(req.query.cols),
rows = parseInt(req.query.rows),
term = terminals[pid];
term.resize(cols, rows);
log('Resized terminal ' + pid + ' to ' + cols + ' cols and ' + rows + ' rows.');
res.end();
});
app.ws('/terminals/:pid', function (ws, req) {
var term = terminals[parseInt(req.params.pid)];
log('Connected to terminal ' + term.pid);
ws.send(logs[term.pid]);
// string message buffering
function buffer(socket, timeout) {
let s = '';
let sender = null;
return (data) => {
s += data;
if (!sender) {
sender = setTimeout(() => {
socket.send(s);
s = '';
sender = null;
}, timeout);
}
};
}
// binary message buffering
function bufferUtf8(socket, timeout) {
let buffer = [];
let sender = null;
let length = 0;
return (data) => {
buffer.push(data);
length += data.length;
if (!sender) {
sender = setTimeout(() => {
socket.send(Buffer.concat(buffer, length));
buffer = [];
sender = null;
length = 0;
}, timeout);
}
};
}
const send = USE_BINARY ? bufferUtf8(ws, 5) : buffer(ws, 5);
term.on('data', function(data) {
XE.emit( '^server/ws/data', { data, } );
try {
send(data);
} catch (ex) {
// The WebSocket is not open, ignore
}
});
ws.on('message', function(msg) {
XE.emit( '^server/ws/message', { message: msg, } );
term.write(msg);
});
ws.on('close', function () {
XE.emit( '^server/ws/close', null );
term.kill();
log('Closed terminal ' + term.pid);
// Clean things up
delete terminals[term.pid];
delete logs[term.pid];
});
});
// ### TAINT must validate host, port
// const host = os.platform() === 'win32' ? '127.0.0.1' : '0.0.0.0';
const host = process.env.xxterm_host || '127.0.0.1';
const port = process.env.xxterm_port || 3000;
log( CND.blue( '^server.js@734-1^', { host, port, } ) );
app.on( 'error', ( error ) => { log( CND.blue( '^server.js@734-8^', error ) ); } );
process.stderr.on( 'data', ( data ) => { log( CND.blue( '^server.js@734-9^', data ) ); } );
//--------------------------------------------------------------------------------------------------------
console.log('^server.js@734-2^ express app going to listen to http://' + host + ':' + port);
const server = app.listen( { host, port, }, () => {
console.log('^server.js@734-3^ express app listening to http://' + host + ':' + port);
process.send?.( { $key: '^connect', port, } )
resolve(); } );
//--------------------------------------------------------------------------------------------------------
server.on('error',function( error ) {
// log( CND.red( CND.reverse( '^server.js@734-15^', error.code ) ) );
log( CND.red( CND.reverse( '^server.js@734-16^', error.message ) ) );
process.exit( 111 );
throw error; } );
} ); // Promise
}
module.exports = startServer;
;
}).call(this);
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