Add terminado.js, an addon for connecting to Terminado backends

This commit is contained in:
Elliot Saba
2016-10-07 13:33:10 -07:00
parent 8fd350f0fc
commit fe54da34f8
5 changed files with 5 additions and 111 deletions
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{
"name": "xterm.terminado",
"main": "terminado.js",
"private": true
}
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Using Terminado with Xterm.js
=============================
Xterm.js is a very flexible system, and as such can be mapped to work with a wide variety of websocket/terminal backends. [Terminado](https://github.com/takluyver/terminado) is one such backend written in Python using `Tornado` as the underlying web framework. This directory shows a more-or-less barebones example of integrating `Terminado` and `Xterm.js`. To do so requires some small edits to `Xterm.js`'s `attach.js` to change the websocket communication format. Briefly, `Terminado` wraps messages in arrays with an element denoting what kind of data it holds, and so rather than simply sending user-typed data directly, one sends `['stdin', data]`.
To run this example, first install Terminado via `pip install terminado`, then simply run `python ./app.py` and connect to http://localhost:8000 to open a shell on localhost.
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"""A single common terminal for all websockets.
"""
import tornado.web
from tornado.ioloop import IOLoop
from terminado import TermSocket, SingleTermManager
if __name__ == '__main__':
term_manager = SingleTermManager(shell_command=['bash'])
handlers = [
(r"/websocket", TermSocket, {'term_manager': term_manager}),
(r"/()", tornado.web.StaticFileHandler, {'path':'index.html'}),
(r"/terminado_attach.js()", tornado.web.StaticFileHandler, {'path':'terminado_attach.js'}),
]
app = tornado.web.Application(handlers, static_path="../dist/")
app.listen(8010)
IOLoop.current().start()
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<!DOCTYPE html>
<head>
<meta charset="UTF-8">
<title>Terminado Xterm.js example page</title>
<style>
html {
background: #555;
height: 100vh;
}
body {
min-height: 100vh;
}
#terminal-container {
position: fixed;
top: 0;
bottom: 0;
left: 0;
right: 0;
width: auto;
height: auto;
z-index: 255;
}
</style>
<link rel="stylesheet" href="/static/xterm.css"/>
<script src="/static/xterm.js"></script>
<script src="/terminado_attach.js"></script>
<script>
var term,
charWidth,
charHeight;
// This chunk of code gratefully stolen/adapted from fit.js
function calculate_character_dimensions() {
subjectRow = term.rowContainer.firstElementChild;
contentBuffer = subjectRow.innerHTML;
subjectRow.style.display = 'inline';
subjectRow.innerHTML = 'W';
charWidth = subjectRow.getBoundingClientRect().width;
subjectRow.style.display = '';
charHeight = parseInt(subjectRow.offsetHeight);
subjectRow.innerHTML = contentBuffer;
}
function createTerminal(websocket_url) {
var terminalContainer = document.getElementById('terminal-container');
// Clean terminal
while (terminalContainer.children.length) {
terminalContainer.removeChild(terminalContainer.children[0]);
}
term = new Terminal({
cursorBlink: true
});
protocol = (location.protocol === 'https:') ? 'wss://' : 'ws://';
socketURL = protocol + location.hostname + ((location.port) ? (':' + location.port) : '') + websocket_url;
term.open(terminalContainer);
var socket = new WebSocket(socketURL);
socket.onopen = function() {
term.attach(socket);
term._initialized = true;
terminalContainer.style.width = '100vw';
terminalContainer.style.height = '100vh';
calculate_character_dimensions();
window.onresize = function() {
cols = Math.floor(terminalContainer.getBoundingClientRect().width/charWidth);
rows = Math.floor(terminalContainer.getBoundingClientRect().height/charHeight);
term.resize(cols, rows);
}
window.onresize()
}
}
window.onload = function() {
// Connect to Terminado, listening on /websocket
createTerminal('/websocket')
}
</script>
</head>
<body>
<div id="terminal-container"></div>
</pre>
</body>