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Merge pull request #474 from kanaka/bug/throw-error-from-constructor 

Throw exceptions from RFB constructor
This commit is contained in:
Solly 2015-03-27 13:23:32 -04:00
parent 245dc8669b d9fc1c7be4
commit cd1ab146bb
7 changed files with 115 additions and 102 deletions
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26
include/display.js
View File

@ -86,29 +86,9 @@ var Display;
}
// Determine browser support for setting the cursor via data URI scheme
var curDat = [];
for (var i = 0; i < 8 * 8 * 4; i++) {
curDat.push(255);
}
try {
var curSave = this._target.style.cursor;
Display.changeCursor(this._target, curDat, curDat, 2, 2, 8, 8);
if (this._target.style.cursor) {
if (this._cursor_uri === null || this._cursor_uri === undefined) {
this._cursor_uri = true;
}
Util.Info("Data URI scheme cursor supported");
this._target.style.cursor = curSave;
} else {
if (this._cursor_uri === null || this._cursor_uri === undefined) {
this._cursor_uri = false;
}
Util.Warn("Data URI scheme cursor not supported");
this._target.style.cursor = "none";
}
} catch (exc) {
Util.Error("Data URI scheme cursor test exception: " + exc);
this._cursor_uri = false;
if (this._cursor_uri || this._cursor_uri === null ||
this._cursor_uri === undefined) {
this._cursor_uri = Util.browserSupportsCursorURIs(this._target);
}
Util.Debug("<< Display.constructor");

62
include/rfb.js
View File

@ -159,11 +159,13 @@ var RFB;
this._encStats[this._encodings[i][1]] = [0, 0];
}
// NB: nothing that needs explicit teardown should be done
// before this point, since this can throw an exception
try {
this._display = new Display({target: this._target});
} catch (exc) {
Util.Error("Display exception: " + exc);
this._updateState('fatal', "No working Display");
throw exc;
}
this._keyboard = new Keyboard({target: this._focusContainer,
@ -217,9 +219,11 @@ var RFB;
} else {
Util.Warn("Using web-socket-js bridge. Flash version: " + Util.Flash.version);
if (!Util.Flash || Util.Flash.version < 9) {
this._updateState('fatal', "WebSockets or <a href='http://get.adobe.com/flashplayer'>Adobe Flash</a> is required");
this._cleanupSocket('fatal');
throw new Exception("WebSockets or <a href='http://get.adobe.com/flashplayer'>Adobe Flash</a> is required");
} else if (document.location.href.substr(0, 7) === 'file://') {
this._updateState('fatal', "'file://' URL is incompatible with Adobe Flash");
this._cleanupSocket('fatal');
throw new Exception("'file://' URL is incompatible with Adobe Flash");
} else {
this._updateState('loaded', 'noVNC ready: WebSockets emulation, ' + rmode);
}
@ -398,6 +402,32 @@ var RFB;
}
},
_cleanupSocket: function (state) {
if (this._sendTimer) {
clearInterval(this._sendTimer);
this._sendTimer = null;
}
if (this._msgTimer) {
clearInterval(this._msgTimer);
this._msgTimer = null;
}
if (this._display && this._display.get_context()) {
this._keyboard.ungrab();
this._mouse.ungrab();
if (state !== 'connect' && state !== 'loaded') {
this._display.defaultCursor();
}
if (Util.get_logging() !== 'debug' || state === 'loaded') {
// Show noVNC logo on load and when disconnected, unless in
// debug mode
this._display.clear();
}
}
this._sock.close();
},
/*
* Page states:
@ -432,31 +462,7 @@ var RFB;
*/
if (state in {'disconnected': 1, 'loaded': 1, 'connect': 1,
'disconnect': 1, 'failed': 1, 'fatal': 1}) {
if (this._sendTimer) {
clearInterval(this._sendTimer);
this._sendTimer = null;
}
if (this._msgTimer) {
clearInterval(this._msgTimer);
this._msgTimer = null;
}
if (this._display && this._display.get_context()) {
this._keyboard.ungrab();
this._mouse.ungrab();
if (state !== 'connect' && state !== 'loaded') {
this._display.defaultCursor();
}
if (Util.get_logging() !== 'debug' || state === 'loaded') {
// Show noVNC logo on load and when disconnected, unless in
// debug mode
this._display.clear();
}
}
this._sock.close();
this._cleanupSocket(state);
}
if (oldstate === 'fatal') {

42
include/ui.js
View File

@ -97,8 +97,6 @@ var UI;
UI.initSetting('path', 'websockify');
UI.initSetting('repeaterID', '');
UI.initRFB();
var autoconnect = WebUtil.getQueryVar('autoconnect', false);
if (autoconnect === 'true' || autoconnect == '1') {
autoconnect = true;
@ -136,7 +134,7 @@ var UI;
Util.addEvent(window, 'load', UI.keyboardinputReset);
Util.addEvent(window, 'beforeunload', function () {
if (UI.rfb_state === 'normal') {
if (UI.rfb && UI.rfb_state === 'normal') {
return "You are currently connected.";
}
} );
@ -161,6 +159,7 @@ var UI;
},
initRFB: function () {
try {
UI.rfb = new RFB({'target': $D('noVNC_canvas'),
'onUpdateState': UI.updateState,
'onXvpInit': UI.updateXvpVisualState,
@ -168,6 +167,11 @@ var UI;
'onFBUComplete': UI.FBUComplete,
'onFBResize': UI.updateViewDragButton,
'onDesktopName': UI.updateDocumentTitle});
return true;
} catch (exc) {
UI.updateState(null, 'fatal', null, 'Unable to create RFB client -- ' + exc);
return false;
}
},
addMouseHandlers: function() {
@ -213,12 +217,14 @@ var UI;
$D("noVNC_connect_button").onclick = UI.connect;
$D("noVNC_resize").onchange = function () {
var connected = UI.rfb_state === 'normal' ? true : false;
var connected = UI.rfb && UI.rfb_state === 'normal';
UI.enableDisableClip(connected);
};
},
onresize: function (callback) {
if (!UI.rfb) return;
var size = UI.getCanvasLimit();
if (size && UI.rfb_state === 'normal' && UI.rfb.get_display()) {
@ -480,7 +486,7 @@ var UI;
} else {
UI.updateSetting('encrypt');
UI.updateSetting('true_color');
if (UI.rfb.get_display().get_cursor_uri()) {
if (Util.browserSupportsCursorURIs()) {
UI.updateSetting('cursor');
} else {
UI.updateSetting('cursor', !UI.isTouchDevice);
@ -536,7 +542,7 @@ var UI;
//Util.Debug(">> settingsApply");
UI.saveSetting('encrypt');
UI.saveSetting('true_color');
if (UI.rfb.get_display().get_cursor_uri()) {
if (Util.browserSupportsCursorURIs()) {
UI.saveSetting('cursor');
}
@ -558,7 +564,7 @@ var UI;
WebUtil.selectStylesheet(UI.getSetting('stylesheet'));
WebUtil.init_logging(UI.getSetting('logging'));
UI.setViewClip();
UI.setViewDrag(UI.rfb.get_viewportDrag());
UI.setViewDrag(UI.rfb && UI.rfb.get_viewportDrag());
//Util.Debug("<< settingsApply");
},
@ -642,13 +648,6 @@ var UI;
break;
}
switch (state) {
case 'fatal':
case 'failed':
case 'disconnected':
UI.initRFB();
}
if (typeof(msg) !== 'undefined') {
$D('noVNC-control-bar').setAttribute("class", klass);
$D('noVNC_status').innerHTML = msg;
@ -659,13 +658,12 @@ var UI;
// Disable/enable controls depending on connection state
updateVisualState: function() {
var connected = UI.rfb_state === 'normal' ? true : false;
var connected = UI.rfb && UI.rfb_state === 'normal';
//Util.Debug(">> updateVisualState");
$D('noVNC_encrypt').disabled = connected;
$D('noVNC_true_color').disabled = connected;
if (UI.rfb && UI.rfb.get_display() &&
UI.rfb.get_display().get_cursor_uri()) {
if (Util.browserSupportsCursorURIs()) {
$D('noVNC_cursor').disabled = connected;
} else {
UI.updateSetting('cursor', !UI.isTouchDevice);
@ -780,6 +778,8 @@ var UI;
throw new Error("Must set host and port");
}
if (!UI.initRFB()) return;
UI.rfb.set_encrypt(UI.getSetting('encrypt'));
UI.rfb.set_true_color(UI.getSetting('true_color'));
UI.rfb.set_local_cursor(UI.getSetting('cursor'));
@ -809,11 +809,15 @@ var UI;
},
displayBlur: function() {
if (!UI.rfb) return;
UI.rfb.get_keyboard().set_focused(false);
UI.rfb.get_mouse().set_focused(false);
},
displayFocus: function() {
if (!UI.rfb) return;
UI.rfb.get_keyboard().set_focused(true);
UI.rfb.get_mouse().set_focused(true);
},
@ -882,7 +886,7 @@ var UI;
// Toggle/set/unset the viewport drag/move button
setViewDrag: function(drag) {
if (!UI.rfb) { return; }
if (!UI.rfb) return;
UI.updateViewDragButton();
@ -953,7 +957,7 @@ var UI;
// sending keyCodes in the normal keyboard events when using on screen keyboards.
keyInput: function(event) {
if (!UI.rfb) { return; }
if (!UI.rfb) return;
var newValue = event.target.value;

23
include/util.js
View File

@ -508,6 +508,29 @@ Util.stopEvent = function (e) {
else { e.returnValue = false; }
};
Util._cursor_uris_supported = null;
Util.browserSupportsCursorURIs = function () {
if (Util._cursor_uris_supported === null) {
try {
var target = document.createElement('canvas');
target.style.cursor = 'url("data:image/x-icon;base64,AAACAAEACAgAAAIAAgA4AQAAFgAAACgAAAAIAAAAEAAAAAEAIAAAAAAAEAAAAAAAAAAAAAAAAAAAAAAAAAD/////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////AAAAAAAAAAAAAAAAAAAAAA==") 2 2, default';
if (target.style.cursor) {
Util.Info("Data URI scheme cursor supported");
Util._cursor_uris_supported = true;
} else {
Util.Warn("Data URI scheme cursor not supported");
Util._cursor_uris_supported = false;
}
} catch (exc) {
Util.Error("Data URI scheme cursor test exception: " + exc);
Util._cursor_uris_supported = false;
}
}
return Util._cursor_uris_supported;
};
// Set browser engine versions. Based on mootools.
Util.Features = {xpath: !!(document.evaluate), air: !!(window.runtime), query: !!(document.querySelector)};

16
tests/test.display.js
View File

@ -28,35 +28,29 @@ describe('Display/Canvas Helper', function () {
describe('checking for cursor uri support', function () {
beforeEach(function () {
this._old_change_cursor = Display.changeCursor;
this._old_browser_supports_cursor_uris = Util.browserSupportsCursorURIs;
});
it('should disable cursor URIs if there is no support', function () {
Display.changeCursor = function(target) {
target.style.cursor = undefined;
};
Util.browserSupportsCursorURIs = function () { return false; };
var display = new Display({ target: document.createElement('canvas'), prefer_js: true, viewport: false });
expect(display._cursor_uri).to.be.false;
});
it('should enable cursor URIs if there is support', function () {
Display.changeCursor = function(target) {
target.style.cursor = 'pointer';
};
Util.browserSupportsCursorURIs = function () { return true; };
var display = new Display({ target: document.createElement('canvas'), prefer_js: true, viewport: false });
expect(display._cursor_uri).to.be.true;
});
it('respect the cursor_uri option if there is support', function () {
Display.changeCursor = function(target) {
target.style.cursor = 'pointer';
};
Util.browserSupportsCursorURIs = function () { return false; };
var display = new Display({ target: document.createElement('canvas'), prefer_js: true, viewport: false, cursor_uri: false });
expect(display._cursor_uri).to.be.false;
});
afterEach(function () {
Display.changeCursor = this._old_change_cursor;
Util.browserSupportsCursorURIs = this._old_browser_supports_cursor_uris;
});
});

4
vnc.html
View File

@ -46,7 +46,7 @@
</head>
<body>
<div id="noVNC-control-bar">
<div id="noVNC-control-bar" class="noVNC_status_normal">
<!--noVNC Mobile Device only Buttons-->
<div class="noVNC-buttons-left">
<input type="image" alt="viewport drag" src="images/drag.png"
@ -87,7 +87,7 @@
</div>
</div>
<div id="noVNC_status">Loading</div>
<div id="noVNC_status"></div>
<!--noVNC Buttons-->
<div class="noVNC-buttons-right">

6
vnc_auto.html
View File

@ -216,6 +216,7 @@
return;
}
try {
rfb = new RFB({'target': $D('noVNC_canvas'),
'encrypt': WebUtil.getQueryVar('encrypt',
(window.location.protocol === "https:")),
@ -228,6 +229,11 @@
'onXvpInit': xvpInit,
'onPasswordRequired': passwordRequired,
'onFBUComplete': FBUComplete});
} catch (exc) {
UI.updateState(null, 'fatal', null, 'Unable to create RFB client -- ' + exc);
return; // don't continue trying to connect
}
rfb.connect(host, port, password, path);
};
</script>