/
container-terminal.js
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/
container-terminal.js
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/*
* This file is part of Cockpit.
*
* Copyright (C) 2015 Red Hat, Inc.
*
* Cockpit is free software; you can redistribute it and/or modify it
* under the terms of the GNU Lesser General Public License as published by
* the Free Software Foundation; either version 2.1 of the License, or
* (at your option) any later version.
*
* Cockpit is distributed in the hope that it will be useful, but
* WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public License
* along with Cockpit; If not, see <http://www.gnu.org/licenses/>.
*/
(function(root, factory) {
if (typeof(define) === 'function' && define.amd)
define(["angular", "term" ], factory);
else
factory(root.angular, root.Terminal);
}(this, function(angular, Terminal) {
"use strict";
/* The kubernetesUI component is quite loosely bound, define if it doesn't exist */
try { angular.module("kubernetesUI"); } catch(e) { angular.module("kubernetesUI", []); }
// https://developer.mozilla.org/en-US/docs/Web/API/WindowBase64/btoa
function utf8_to_b64( str ) {
return window.btoa(window.unescape(encodeURIComponent( str )));
}
function b64_to_utf8( str ) {
return decodeURIComponent(window.escape(window.atob( str )));
}
return angular.module('kubernetesUI')
.provider('kubernetesContainerSocket', function() {
var self = this;
/* The default WebSocketFactory */
self.WebSocketFactory = function() {
return function ContainerWebSocket(url, protocols) {
if (url.indexOf("/") === 0) {
if (window.location.protocol === "http:")
url = "ws://" + window.location.host + url;
else
url = "wss://" + window.location.host + url;
}
return new window.WebSocket(url, protocols);
};
};
function load(injector, name) {
if (!name)
throw "no WebSocketFactory set";
else if (angular.isString(name))
return injector.get(name, "kubernetesContainerSocket");
else
return injector.invoke(name);
}
self.$get = [
"$injector",
function($injector) {
return load($injector, self.WebSocketFactory);
}
];
})
.directive('kubernetesContainerTerminal', [
"$q", "kubernetesContainerSocket",
function($q, kubernetesContainerSocket) {
return {
restrict: 'E',
scope: {
pod: '&',
container: '&',
command: '=?',
prevent: '=?',
rows: '=?',
cols: '=?',
screenKeys: '=?',
autofocus: '=?',
status: '=?'
},
link: function(scope, element, attrs) {
scope.status = 'disconnected';
/* term.js wants the parent element to build its terminal inside of */
var outer = angular.element("<div class='terminal-wrapper'>");
element.append(outer);
var spinner = angular.element("<div class='spinner spinner-inverse hidden'>");
var button = angular.element("<button class='btn btn-default fa fa-refresh'>");
button.on("click", connect).attr("title", "Connect");
element.append(angular.element("<div class='terminal-actions'>")
.append(spinner).append(button));
var alive = null;
var ws = null;
var defaultCols = 80;
var defaultRows = 24;
var term = new Terminal({
cols: scope.cols || defaultCols,
rows: scope.rows || defaultRows,
cursorBlink: true,
fontFamily: "'Courier New', 'Courier', monospace",
fontSize: 12,
lineHeight: 1,
theme: {
foreground: "#f0f0f0"
},
screenKeys: scope.screenKeys || true,
applicationCursor: true, // Needed for proper scrollback behavior in applications like vi
mouseEvents: true // Needed for proper scrollback behavior in applications like vi
});
outer.empty();
term.open(outer[0]);
term.cursorHidden = true;
term.refresh(term._core.buffer.y, term._core.buffer.y);
term.on('data', function(data) {
if (ws && ws.readyState === 1)
ws.send("0" + utf8_to_b64(data));
});
var sizeViewport = function () {
var cols = scope.cols || defaultCols;
if (!term._core.charMeasure.width) {
return;
}
var xtermViewport = element[0].getElementsByClassName("xterm-viewport")[0];
// character width * number of columns + space for a scrollbar
// TODO determine the max width of a scrollbar across browsers
xtermViewport.style.width = (term._core.charMeasure.width * cols + 17) + "px";
};
term._core.charMeasure.on('charsizechanged', sizeViewport);
var sizeTerminal = function() {
var cols = scope.cols || defaultCols;
var rows = scope.rows || defaultRows;
term.resize(cols, rows);
sizeViewport();
if (ws && ws.readyState === 1) {
ws.send("4" + window.btoa('{"Width":' + cols + ',"Height":' + rows + '}'));
}
};
function connect() {
disconnect();
term.reset();
var url = "";
var pod = scope.pod();
if (pod.metadata)
url += pod.metadata.selfLink;
else
url += pod;
url += "/exec";
if (url.indexOf('?') === -1)
url += '?';
url += "stdout=1&stdin=1&stderr=1&tty=1";
var container = scope.container ? scope.container() : null;
if (container)
url += "&container=" + encodeURIComponent(container);
var command = scope.command;
if (!command)
command = [ "/bin/sh", "-i" ];
if (typeof (command) === "string")
command = [ command ];
command.forEach(function(arg) {
url += "&command=" + encodeURIComponent(arg);
});
var first = true;
spinner.removeClass("hidden");
button.addClass("hidden");
function fatal(message) {
if (!message && first)
message = "Could not connect to the container. Do you have sufficient privileges?";
if (!message)
message = "disconnected";
if (!first)
message = "\r\n" + message;
term.write('\x1b[31m' + message + '\x1b[m\r\n');
scope.status = 'disconnected';
scope.$apply(disconnect);
}
$q.when(kubernetesContainerSocket(url, "base64.channel.k8s.io"),
function resolved(socket) {
ws = socket;
ws.onopen = function(ev) {
alive = window.setInterval(function() {
ws.send("0");
}, 30 * 1000);
// make sure terminal is reset to the right size in case the terminal was resized while the connection was opening
sizeTerminal();
};
ws.onmessage = function(ev) {
var data = ev.data.slice(1);
switch(ev.data[0]) {
case '1':
case '2':
case '3':
term.write(b64_to_utf8(data));
break;
}
if (first) {
first = false;
spinner.addClass("hidden");
button.addClass("hidden");
term.cursorHidden = false;
term._core.showCursor();
if (scope.autofocus && term.element) {
term.focus();
}
}
};
ws.onclose = function(ev) {
scope.status = 'disconnected';
fatal(ev.reason);
};
},
function rejected(ex) {
fatal(ex.message);
}
);
scope.status = 'connected';
}
function disconnect() {
scope.status = 'disconnected';
spinner.addClass("hidden");
button.removeClass("hidden");
/* There's no term.hideCursor() function */
if (term) {
term.cursorHidden = true;
term.refresh(term._core.buffer.y, term._core.buffer.y);
}
if (ws) {
ws.onopen = ws.onmessage = ws.onerror = ws.onclose = null;
if (ws.readyState < 2) // CLOSING
ws.close();
ws = null;
}
window.clearInterval(alive);
alive = null;
}
scope.$watchGroup(["cols", "rows"], sizeTerminal);
scope.$watch("prevent", function(prevent) {
if (!prevent)
connect();
});
scope.$on("$destroy", function() {
if (term)
term.destroy();
disconnect();
});
}
};
}
]);
}));