many enhancements to the ssh terminal support
This commit is contained in:
235
xterm.html
235
xterm.html
@ -4,73 +4,228 @@
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<meta charset="UTF-8">
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<meta name="viewport" content="width=device-width, initial-scale=1.0">
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<title>Terminal</title>
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<title>{{ .RouteName }}</title>
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<link rel="stylesheet" href="/_ssh/xterm.css" />
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<style>
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body {
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margin: 0;
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height: 100%;
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}
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#terminal-container {
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display: flex;
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flex-direction: column;
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width: 100%;
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height: 100vh;
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}
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#terminal-status-container {
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vertical-align: middle;
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padding: 3px;
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}
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#terminal-status {
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display: inline-block;
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font-weight: bold;
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height: 100%;
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vertical-align: middle;
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}
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#terminal-errmsg {
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display: inline-block;
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color: red;
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height: 100%;
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vertical-align: middle;
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}
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#terminal-control {
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display: inline-block;
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height: 100%;
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vertical-align: middle;
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}
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#terminal-control button {
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vertical-align: middle;
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}
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#terminal-view-container {
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flex: 1;
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width: 100%;
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min-height: 0;
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/*height: 100%;*/
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}
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#login-container {
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display: flex;
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justify-content: center;
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align-items: center;
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position: fixed;
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top: 0;
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left: 0;
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width: 100%;
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height: 100%;
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background-color: rgba(0, 0, 0, 0.5);
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z-index: 99999;
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}
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#login-form-container {
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background: white;
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padding: 20px;
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border-radius: 8px;
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box-shadow: 0 0 10px rgba(0, 0, 0, 0.5);
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text-align: center;
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}
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</style>
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<script src="/_ssh/xterm.js"></script>
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<script src="/_ssh/xterm-addon-fit.js"></script>
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<script>
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window.addEventListener("load", function(event) {
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window.onload = function(event) {
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const terminal_container = document.getElementById('terminal-container');
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const terminal_status = document.getElementById('terminal-status');
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const terminal_errmsg = document.getElementById('terminal-errmsg');
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const terminal_view_container = document.getElementById('terminal-view-container');
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const terminal_disconnect = document.getElementById('terminal-disconnect');
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const login_container = document.getElementById('login-container');
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const login_form = document.getElementById('login-form');
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const username_field = document.getElementById('username');
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const password_field= document.getElementById('password');
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const term = new window.Terminal();
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const fit = new window.FitAddon.FitAddon();
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const textDecoder = new TextDecoder();
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const fit_addon = new window.FitAddon.FitAddon();
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const text_decoder = new TextDecoder();
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let currentLocation = window.location.host;
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let prefix = window.location.protocol === 'https:' ? 'wss://' : 'ws://';
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const socket = new WebSocket(prefix + currentLocation + '/_ssh-ws/{{ .ConnId }}/{{ .RouteId }}');
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socket.binaryType = 'arraybuffer';
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term.loadAddon(fit_addon)
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term.open(terminal_view_container);
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term.loadAddon(fit)
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term.open(document.getElementById('terminal-container'));
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term.writeln('Connecting...');
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let set_terminal_status = function(msg, errmsg) {
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if (msg != null) terminal_status.innerHTML = msg;
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if (errmsg != null) terminal_errmsg.innerHTML = errmsg
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}
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const fit_term = function() {
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fit.fit();
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socket.send(JSON.stringify({ type: 'resize', data: term.rows.toString() + " " + term.cols.toString() }));
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};
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let toggle_login_form = function(visible) {
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login_container.style.visibility = (visible? 'visible': 'hidden');
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terminal_disconnect.style.visibility = (visible? 'hidden': 'visible');
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if (visible) username_field.focus();
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else term.focus();
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}
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socket.onopen = function () {
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term.writeln('Connected');
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fit_term();
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};
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let resize_term_unconnected = function() {
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fit_addon.fit();
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}
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socket.onmessage = function(event) {
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if (typeof event.data === 'string') {
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term.write(event.data);
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} else {
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const text = textDecoder.decode(new Uint8Array(event.data));
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term.write(text);
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}
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};
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toggle_login_form(true);
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window.onresize = resize_term_unconnected;
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resize_term_unconnected()
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socket.onerror = function (event) {
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console.error('WebSocket error:', event);
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term.writeln('WebSocket error. See console for details.');
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};
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login_form.onsubmit = async function(event) {
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event.preventDefault();
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toggle_login_form(false)
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socket.onclose = function () {
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term.writeln('Disconnected');
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};
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const username = username_field.value.trim();
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const password = password_field.value.trim();
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term.onData(function(data) {
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socket.send(JSON.stringify({ type: 'key', data: data }));
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});
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let prefix = window.location.protocol === 'https:' ? 'wss://' : 'ws://';
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const socket = new WebSocket(prefix + window.location.host + '/_ssh-ws/{{ .ConnId }}/{{ .RouteId }}');
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socket.binaryType = 'arraybuffer';
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window.addEventListener('resize', fit_term);
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});
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set_terminal_status('Connecting...', '');
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const resize_term_connected = function() {
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fit_addon.fit();
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if (socket.readyState == 1) // if open
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socket.send(JSON.stringify({ type: 'size', data: [term.rows.toString(), term.cols.toString()] }));
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};
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socket.onopen = function () {
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socket.send(JSON.stringify({ type: 'open', data: [username, password]}));
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};
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socket.onmessage = function(event) {
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try {
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let event_text;
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event_text = (typeof event.data === 'string')? event.data: text_decoder.decode(new Uint8Array(event.data));
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const msg = JSON.parse(event_text);
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if (msg.type == "iov") {
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for (const data of msg.data) term.write(data);
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} else if (msg.type == "status") {
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if (msg.data.length >= 1) {
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if (msg.data[0] == 'opened') {
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set_terminal_status('Connected', '');
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resize_term_connected()
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} else if (msg.data[0] == 'closed') {
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// doesn't really matter
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// socket.onclose() will be executed anyway
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}
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}
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} else if (msg.type == "error") {
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toggle_login_form(true);
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window.onresize = resize_term_unconnected;
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set_terminal_status(null, msg.data.join(' '))
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}
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} catch (e) {
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set_terminal_status('Disconnected', e);
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toggle_login_form(true)
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window.onresize = resize_term_unconnected;
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}
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};
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socket.onerror = function(event) {
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set_terminal_status('Disconnected', event);
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toggle_login_form(true)
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window.onresize = resize_term_unconnected;
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term.write("\r\n")
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};
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socket.onclose = function() {
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set_terminal_status('Disconnected', null);
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toggle_login_form(true)
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window.onresize = resize_term_unconnected;
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term.write("\r\n")
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};
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term.onData(function(data) {
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if (socket.readyState == 1) // if open
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socket.send(JSON.stringify({ type: 'iov', data: [data] }));
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});
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window.onresize = resize_term_connected;
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terminal_disconnect.onclick = function(event) {
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socket.send(JSON.stringify({ type: 'close', data: [""] }));
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//socket.close()
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};
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}
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};
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</script>
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</head>
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<body>
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<div id="terminal-container"></div>
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<div id="login-container">
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<div id="login-form-container">
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<h2>{{ .RouteName }}</h2>
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<form id="login-form">
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<label>
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Username: <input type="text" id="username" required />
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</label>
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<br /><br />
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<label>
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Password: <input type="password" id="password" required />
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</label>
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<br /><br />
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<button type="submit">Connect</button>
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</form>
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</div>
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</div>
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<div id="terminal-container">
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<div id="terminal-status-container">
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<div id="terminal-status"></div>
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<div id="terminal-errmsg"></div>
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<div id="terminal-control">
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<button id="terminal-disconnect" type="button">Disconnect</button>
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</div>
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</div>
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<div id="terminal-view-container"></div>
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</div>
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</body>
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</html>
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