refactoring

web/js/kvm/atx.js

@@ -0,0 +1,63 @@
+function Atx() {
+	var self = this;
+
+	/********************************************************************************/
+
+	var __init__ = function() {
+		$("atx-power-led").title = "Power Led";
+		$("atx-hdd-led").title = "Disk Activity Led";
+
+		tools.setOnClick($("atx-power-button"), () => __clickButton("power", null, "Are you sure to click the power button?"));
+		tools.setOnClick($("atx-power-button-long"), () => __clickButton("power_long", 15000, "Are you sure to perform the long press of the power button?"));
+		tools.setOnClick($("atx-reset-button"), () => __clickButton("reset", null, "Are you sure to reboot the server?"));
+	};
+
+	/********************************************************************************/
+
+	self.loadInitialState = function() {
+		var http = tools.makeRequest("GET", "/kvmd/atx", function() {
+			if (http.readyState === 4) {
+				if (http.status === 200) {
+					__setButtonsBusy(JSON.parse(http.responseText).result.busy);
+				} else {
+					setTimeout(self.loadInitialState, 1000);
+				}
+			}
+		});
+	};
+
+	self.setState = function(state) {
+		__setButtonsBusy(state.busy);
+		$("atx-power-led").className = (state.leds.power ? "led-green" : "led-gray");
+		$("atx-hdd-led").className = (state.leds.hdd ? "led-red" : "led-gray");
+	};
+
+	self.clearState = function() {
+		$("atx-power-led").className = "led-gray";
+		$("atx-hdd-led").className = "led-gray";
+	};
+
+	var __clickButton = function(button, timeout, confirm_msg) {
+		ui.confirm(confirm_msg).then(function(ok) {
+			if (ok) {
+				var http = tools.makeRequest("POST", "/kvmd/atx/click?button=" + button, function() {
+					if (http.readyState === 4) {
+						if (http.status === 409) {
+							ui.error("Performing another ATX operation for other client.<br>Please try again later");
+						} else if (http.status !== 200) {
+							ui.error("Click error:<br>", http.responseText);
+						}
+					}
+				}, timeout);
+			}
+		});
+	};
+
+	var __setButtonsBusy = function(busy) {
+		$("atx-power-button").disabled = busy;
+		$("atx-power-button-long").disabled = busy;
+		$("atx-reset-button").disabled = busy;
+	};
+
+	__init__();
+}

web/js/kvm/hid.js

@@ -0,0 +1,195 @@
+function Hid() {
+	var self = this;
+
+	/********************************************************************************/
+
+	var __ws = null;
+
+	var __chars_to_codes = {};
+	var __codes_delay = 50;
+
+	var __keyboard = new Keyboard();
+	var __mouse = new Mouse();
+
+	var __init__ = function() {
+		var __hidden_attr = null;
+		var __visibility_change_attr = null;
+
+		if (typeof document.hidden !== "undefined") {
+			__hidden_attr = "hidden";
+			__visibility_change_attr = "visibilitychange";
+		} else if (typeof document.webkitHidden !== "undefined") {
+			__hidden_attr = "webkitHidden";
+			__visibility_change_attr = "webkitvisibilitychange";
+		} else if (typeof document.mozHidden !== "undefined") {
+			__hidden_attr = "mozHidden";
+			__visibility_change_attr = "mozvisibilitychange";
+		}
+
+		if (__visibility_change_attr) {
+			document.addEventListener(
+				__visibility_change_attr,
+				function() {
+					if (document[__hidden_attr]) {
+						__releaseAll();
+					}
+				},
+				false
+			);
+		}
+
+		window.onpagehide = __releaseAll;
+		window.onblur = __releaseAll;
+
+		__chars_to_codes = __buildCharsToCodes();
+		tools.setOnClick($("hid-pak-button"), __clickPasteAsKeysButton);
+
+		tools.setOnClick($("hid-reset-button"), __clickResetButton);
+
+		Array.prototype.forEach.call(document.querySelectorAll("[data-shortcut]"), function(el_shortcut) {
+			tools.setOnClick(el_shortcut, () => __emitShortcut(el_shortcut.getAttribute("data-shortcut").split(" ")));
+		});
+	};
+
+	/********************************************************************************/
+
+	self.setSocket = function(ws) {
+		__ws = ws;
+		__keyboard.setSocket(ws);
+		__mouse.setSocket(ws);
+		$("hid-pak-text").disabled = $("hid-pak-button").disabled = $("hid-reset-button").disabled = !ws;
+	};
+
+	var __releaseAll = function() {
+		__keyboard.releaseAll();
+	};
+
+	var __emitShortcut = function(codes) {
+		return new Promise(function(resolve) {
+			tools.debug("HID: emitting keys:", codes);
+
+			var raw_events = [];
+			[[codes, true], [codes.slice().reverse(), false]].forEach(function(op) {
+				var [op_codes, state] = op;
+				op_codes.forEach(function(code) {
+					raw_events.push({code: code, state: state});
+				});
+			});
+
+			var index = 0;
+			var iterate = () => setTimeout(function() {
+				__keyboard.fireEvent(raw_events[index].code, raw_events[index].state);
+				++index;
+				if (index < raw_events.length) {
+					iterate();
+				} else {
+					resolve(null);
+				}
+			}, __codes_delay);
+			iterate();
+		});
+	};
+
+	var __buildCharsToCodes = function() {
+		var chars_to_codes = {
+			"\n": ["Enter"],
+			"\t": ["Tab"],
+			" ": ["Space"],
+			"`": ["Backquote"],   "~": ["ShiftLeft", "Backquote"],
+			"\\": ["Backslash"],  "|": ["ShiftLeft", "Backslash"],
+			"[": ["BracketLeft"], "{": ["ShiftLeft", "BracketLeft"],
+			"]": ["BracketLeft"], "}": ["ShiftLeft", "BracketRight"],
+			",": ["Comma"],       "<": ["ShiftLeft", "Comma"],
+			".": ["Period"],      ">": ["ShiftLeft", "Period"],
+			"1": ["Digit1"],      "!": ["ShiftLeft", "Digit1"],
+			"2": ["Digit2"],      "@": ["ShiftLeft", "Digit2"],
+			"3": ["Digit3"],      "#": ["ShiftLeft", "Digit3"],
+			"4": ["Digit4"],      "$": ["ShiftLeft", "Digit4"],
+			"5": ["Digit5"],      "%": ["ShiftLeft", "Digit5"],
+			"6": ["Digit6"],      "^": ["ShiftLeft", "Digit6"],
+			"7": ["Digit7"],      "&": ["ShiftLeft", "Digit7"],
+			"8": ["Digit8"],      "*": ["ShiftLeft", "Digit8"],
+			"9": ["Digit9"],      "(": ["ShiftLeft", "Digit9"],
+			"0": ["Digit0"],      ")": ["ShiftLeft", "Digit0"],
+			"-": ["Minus"],       "_": ["ShiftLeft", "Minus"],
+			"'": ["Quote"],       "\"": ["ShiftLeft", "Quote"],
+			";": ["Semicolon"],   ":": ["ShiftLeft", "Semicolon"],
+			"/": ["Slash"],       "?": ["ShiftLeft", "Slash"],
+			"=": ["Equal"],       "+": ["ShiftLeft", "Equal"],
+		};
+
+		for (var ch = "a".charCodeAt(0); ch <= "z".charCodeAt(0); ++ch) {
+			var low = String.fromCharCode(ch);
+			var up = low.toUpperCase();
+			var code = "Key" + up;
+			chars_to_codes[low] = [code];
+			chars_to_codes[up] = ["ShiftLeft", code];
+		}
+
+		return chars_to_codes;
+	};
+
+	var __clickPasteAsKeysButton = function() {
+		var text = $("hid-pak-text").value.replace(/[^\x00-\x7F]/g, "");  // eslint-disable-line no-control-regex
+		if (text) {
+			var clipboard_codes = [];
+			var codes_count = 0;
+			[...text].forEach(function(ch) {
+				var codes = __chars_to_codes[ch];
+				if (codes) {
+					codes_count += codes.length;
+					clipboard_codes.push(codes);
+				}
+			});
+
+			var confirm_msg = (
+				"You are going to automatically type " + codes_count
+				+ " characters from the system clipboard."
+				+ " It will take " + (__codes_delay * codes_count * 2 / 1000) + " seconds.<br>"
+				+ "<br>Are you sure you want to continue?<br>"
+			);
+
+			ui.confirm(confirm_msg).then(function(ok) {
+				if (ok) {
+					$("hid-pak-text").disabled = true;
+					$("hid-pak-button").disabled = true;
+					$("hid-pak-led").className = "led-yellow-rotating-fast";
+					$("hid-pak-led").title = "Autotyping...";
+
+					tools.debug("HID: paste-as-keys:", text);
+
+					var index = 0;
+					var iterate = function() {
+						__emitShortcut(clipboard_codes[index]).then(function() {
+							++index;
+							if (index < clipboard_codes.length && __ws) {
+								iterate();
+							} else {
+								$("hid-pak-text").value = "";
+								$("hid-pak-text").disabled = false;
+								$("hid-pak-button").disabled = false;
+								$("hid-pak-led").className = "led-gray";
+								$("hid-pak-led").title = "";
+							}
+						});
+					};
+					iterate();
+				} else {
+					$("hid-pak-text").value = "";
+				}
+			});
+		}
+	};
+
+	var __clickResetButton = function() {
+		var http = tools.makeRequest("POST", "/kvmd/hid/reset", function() {
+			if (http.readyState === 4) {
+				if (http.status !== 200) {
+					ui.error("HID reset error:<br>", http.responseText);
+				}
+			}
+		});
+	};
+
+	__init__();
+}

web/js/kvm/keyboard.js

@@ -0,0 +1,187 @@
+function Keyboard() {
+	var self = this;
+
+	/********************************************************************************/
+
+	var __ws = null;
+
+	var __keys = [].slice.call(document.querySelectorAll("div#keyboard-desktop div.keyboard-block div.keyboard-row div.key"));
+	var __modifiers = [].slice.call(document.querySelectorAll("div#keyboard-desktop div.keyboard-block div.keyboard-row div.modifier"));
+
+	var __mac_cmd_hook = ((
+		window.navigator.oscpu
+		|| window.navigator.platform
+		|| window.navigator.appVersion
+		|| "Unknown"
+	).indexOf("Mac") !== -1);
+
+	var __init__ = function() {
+		$("hid-keyboard-led").title = "Keyboard free";
+
+		$("keyboard-window").onkeydown = (event) => __keyboardHandler(event, true);
+		$("keyboard-window").onkeyup = (event) => __keyboardHandler(event, false);
+		$("keyboard-window").onfocus = __updateLeds;
+		$("keyboard-window").onblur = __updateLeds;
+
+		$("stream-window").onkeydown = (event) => __keyboardHandler(event, true);
+		$("stream-window").onkeyup = (event) => __keyboardHandler(event, false);
+		$("stream-window").onfocus = __updateLeds;
+		$("stream-window").onblur = __updateLeds;
+
+		Array.prototype.forEach.call($$("key"), function(el_key) {
+			tools.setOnDown(el_key, () => __clickHandler(el_key, true));
+			tools.setOnUp(el_key, () => __clickHandler(el_key, false));
+			el_key.onmouseout = function() {
+				if (__isPressed(el_key)) {
+					__clickHandler(el_key, false);
+				}
+			};
+		});
+
+		Array.prototype.forEach.call($$("modifier"), function(el_key) {
+			tools.setOnDown(el_key, () => __toggleModifierHandler(el_key));
+		});
+
+		if (__mac_cmd_hook) {
+			tools.info("Keyboard: enabled Mac-CMD-Hook");
+		}
+	};
+
+	/********************************************************************************/
+
+	self.setSocket = function(ws) {
+		if (ws !== __ws) {
+			self.releaseAll();
+			__ws = ws;
+		}
+		__updateLeds();
+	};
+
+	self.releaseAll = function() {
+		__keys.concat(__modifiers).forEach(function(el_key) {
+			if (__isActive(el_key)) {
+				self.fireEvent(el_key.getAttribute("data-key"), false);
+			}
+		});
+	};
+
+	self.fireEvent = function(code, state) {
+		__keyboardHandler({code: code}, state);
+	};
+
+	var __updateLeds = function() {
+		if (__ws && (document.activeElement === $("stream-window") || document.activeElement === $("keyboard-window"))) {
+			$("hid-keyboard-led").className = "led-green";
+			$("hid-keyboard-led").title = "Keyboard captured";
+		} else {
+			$("hid-keyboard-led").className = "led-gray";
+			$("hid-keyboard-led").title = "Keyboard free";
+		}
+	};
+
+	var __keyboardHandler = function(event, state) {
+		if (event.preventDefault) {
+			event.preventDefault();
+		}
+		var el_key = document.querySelector("[data-key='" + event.code + "']");
+		if (el_key && !event.repeat) {
+			__commonHandler(el_key, state, "pressed");
+			if (__mac_cmd_hook) {
+				// https://bugs.chromium.org/p/chromium/issues/detail?id=28089
+				// https://bugzilla.mozilla.org/show_bug.cgi?id=1299553
+				if ((event.code === "MetaLeft" || event.code === "MetaRight") && !state) {
+					__keys.forEach(function(el_key) {
+						if (__isActive(el_key)) {
+							self.fireEvent(el_key.getAttribute("data-key"), false);
+						}
+					});
+				}
+			}
+			__unholdModifiers();
+		}
+	};
+
+	var __clickHandler = function(el_key, state) {
+		__commonHandler(el_key, state, "pressed");
+		__unholdModifiers();
+	};
+
+	var __toggleModifierHandler = function(el_key) {
+		__commonHandler(el_key, !__isActive(el_key), "holded");
+	};
+
+	var __unholdModifiers = function() {
+		__modifiers.forEach(function(el_key) {
+			if (__isHolded(el_key)) {
+				__deactivate(el_key);
+				__sendKey(el_key, false);
+			}
+		});
+	};
+
+	var __commonHandler = function(el_key, state, cls) {
+		if (state && !__isActive(el_key)) {
+			__deactivate(el_key);
+			__activate(el_key, cls);
+			__sendKey(el_key, true);
+		} else {
+			__deactivate(el_key);
+			__sendKey(el_key, false);
+		}
+	};
+
+	var __isPressed = function(el_key) {
+		var is_pressed = false;
+		Array.prototype.forEach.call(__resolveKeys(el_key), function(el_key) {
+			is_pressed = (is_pressed || el_key.classList.contains("pressed"));
+		});
+		return is_pressed;
+	};
+
+	var __isHolded = function(el_key) {
+		var is_holded = false;
+		Array.prototype.forEach.call(__resolveKeys(el_key), function(el_key) {
+			is_holded = (is_holded || el_key.classList.contains("holded"));
+		});
+		return is_holded;
+	};
+
+	var __isActive = function(el_key) {
+		var is_active = false;
+		Array.prototype.forEach.call(__resolveKeys(el_key), function(el_key) {
+			is_active = (is_active || el_key.classList.contains("pressed") || el_key.classList.contains("holded"));
+		});
+		return is_active;
+	};
+
+	var __activate = function(el_key, cls) {
+		Array.prototype.forEach.call(__resolveKeys(el_key), function(el_key) {
+			el_key.classList.add(cls);
+		});
+	};
+
+	var __deactivate = function(el_key) {
+		Array.prototype.forEach.call(__resolveKeys(el_key), function(el_key) {
+			el_key.classList.remove("pressed");
+			el_key.classList.remove("holded");
+		});
+	};
+
+	var __resolveKeys = function(el_key) {
+		return document.querySelectorAll("[data-key='" + el_key.getAttribute("data-key") + "']");
+	};
+
+	var __sendKey = function(el_key, state) {
+		var code = el_key.getAttribute("data-key");
+		tools.debug("Keyboard: key", (state ? "pressed:" : "released:"), code);
+		if (__ws) {
+			__ws.send(JSON.stringify({
+				event_type: "key",
+				key: code,
+				state: state,
+			}));
+		}
+	};
+
+	__init__();
+}

web/js/kvm/main.js

@@ -0,0 +1,23 @@
+var ui;
+
+function main() {
+	if (
+		!window.navigator
+		|| window.navigator.userAgent.indexOf("MSIE ") > 0
+		|| window.navigator.userAgent.indexOf("Trident/") > 0
+		|| window.navigator.userAgent.indexOf("Edge/") > 0
+	) {
+		$("bad-browser-modal").style.visibility = "visible";
+	} else {
+		ui = new Ui();
+
+		tools.setOnClick($("show-about-button"), () => ui.showWindow($("about-window")));
+		tools.setOnClick($("show-keyboard-button"), () => ui.showWindow($("keyboard-window")));
+		tools.setOnClick($("show-stream-button"), () => ui.showWindow($("stream-window")));
+		tools.setOnClick($("open-log-button"), () => ui.open("kvmd/log?seek=3600&follow=1", "_blank"));
+
+		ui.showWindow($("stream-window"));
+
+		new Session();
+	}
+}

web/js/kvm/mouse.js

@@ -0,0 +1,159 @@
+function Mouse() {
+	var self = this;
+
+	/********************************************************************************/
+
+	var __ws = null;
+
+	var __current_pos = {x: 0, y:0};
+	var __sent_pos = {x: 0, y:0};
+	var __wheel_delta = {x: 0, y: 0};
+
+	var __stream_hovered = false;
+
+	var __init__ = function() {
+		$("hid-mouse-led").title = "Mouse free";
+
+		$("stream-box").onmouseenter = __hoverStream;
+		$("stream-box").onmouseleave = __leaveStream;
+		$("stream-box").onmousedown = (event) => __buttonHandler(event, true);
+		$("stream-box").onmouseup = (event) => __buttonHandler(event, false);
+		$("stream-box").oncontextmenu = (event) => event.preventDefault();
+		$("stream-box").onmousemove = __moveHandler;
+		$("stream-box").onwheel = __wheelHandler;
+
+		$("stream-box").ontouchstart = (event) => __touchMoveHandler(event);
+		Array.prototype.forEach.call(document.querySelectorAll("[data-mouse-button]"), function(el_button) {
+			var button = el_button.getAttribute("data-mouse-button");
+			tools.setOnDown(el_button, () => __sendButton(button, true));
+			tools.setOnUp(el_button, () => __sendButton(button, false));
+		});
+
+		setInterval(__sendMove, 100);
+	};
+
+	/********************************************************************************/
+
+	self.setSocket = function(ws) {
+		__ws = ws;
+		if (ws) {
+			$("stream-box").classList.add("stream-box-mouse-enabled");
+		} else {
+			$("stream-box").classList.remove("stream-box-mouse-enabled");
+		}
+		__updateLeds();
+	};
+
+	var __hoverStream = function() {
+		__stream_hovered = true;
+		__updateLeds();
+	};
+
+	var __leaveStream = function() {
+		__stream_hovered = false;
+		__updateLeds();
+	};
+
+	var __updateLeds = function() {
+		if (__ws && (__stream_hovered || tools.browser.is_ios)) {
+			// Mouse is always available on iOS via touchscreen
+			$("hid-mouse-led").className = "led-green";
+			$("hid-mouse-led").title = "Mouse tracked";
+		} else {
+			$("hid-mouse-led").className = "led-gray";
+			$("hid-mouse-led").title = "Mouse free";
+		}
+	};
+
+	var __buttonHandler = function(event, state) {
+		// https://www.w3schools.com/jsref/event_button.asp
+		event.preventDefault();
+		switch (event.button) {
+			case 0: __sendButton("left", state); break;
+			case 2: __sendButton("right", state); break;
+		}
+	};
+
+	var __touchMoveHandler = function(event) {
+		event.preventDefault();
+		if (event.touches[0].target && event.touches[0].target.getBoundingClientRect) {
+			var rect = event.touches[0].target.getBoundingClientRect();
+			__current_pos = {
+				x: Math.round(event.touches[0].clientX - rect.left),
+				y: Math.round(event.touches[0].clientY - rect.top),
+			};
+			__sendMove();
+		}
+	};
+
+	var __moveHandler = function(event) {
+		var rect = event.target.getBoundingClientRect();
+		__current_pos = {
+			x: Math.round(event.clientX - rect.left),
+			y: Math.round(event.clientY - rect.top),
+		};
+	};
+
+
+	var __sendButton = function(button, state) {
+		tools.debug("Mouse: button", (state ? "pressed:" : "released:"), button);
+		__sendMove();
+		if (__ws) {
+			__ws.send(JSON.stringify({
+				event_type: "mouse_button",
+				button: button,
+				state: state,
+			}));
+		}
+	};
+
+	var __sendMove = function() {
+		var pos = __current_pos;
+		if (pos.x !== __sent_pos.x || pos.y !== __sent_pos.y) {
+			var el_stream_image = $("stream-image");
+			var to = {
+				x: __translate(pos.x, 0, el_stream_image.clientWidth, -32768, 32767),
+				y: __translate(pos.y, 0, el_stream_image.clientHeight, -32768, 32767),
+			};
+			tools.debug("Mouse: moved:", to);
+			if (__ws) {
+				__ws.send(JSON.stringify({
+					event_type: "mouse_move",
+					to: to,
+				}));
+			}
+			__sent_pos = pos;
+		}
+	};
+
+	var __translate = function(x, a, b, c, d) {
+		return Math.round((x - a) / (b - a) * (d - c) + c);
+	};
+
+	var __wheelHandler = function(event) {
+		// https://learn.javascript.ru/mousewheel
+		if (event.preventDefault) {
+			event.preventDefault();
+		}
+
+		var delta = {x: 0, y: 0};
+
+		__wheel_delta.y += event.deltaY;
+		if (Math.abs(__wheel_delta.y) >= 100) {
+			delta.y = __wheel_delta.y / Math.abs(__wheel_delta.y) * (-5);
+			__wheel_delta.y = 0;
+		}
+
+		if (delta.y) {
+			tools.debug("Mouse: scrolled:", delta);
+			if (__ws) {
+				__ws.send(JSON.stringify({
+					event_type: "mouse_wheel",
+					delta: delta,
+				}));
+			}
+		}
+	};
+
+	__init__();
+}

web/js/kvm/msd.js

@@ -0,0 +1,179 @@
+function Msd() {
+	var self = this;
+
+	/********************************************************************************/
+
+	var __state = null;
+	var __upload_http = null;
+	var __image_file = null;
+
+	var __init__ = function() {
+		$("msd-led").title = "Unknown state";
+
+		$("msd-select-new-image-file").onchange = __selectNewImageFile;
+		tools.setOnClick($("msd-select-new-image-button"), () => $("msd-select-new-image-file").click());
+
+		tools.setOnClick($("msd-upload-new-image-button"), __clickUploadNewImageButton);
+		tools.setOnClick($("msd-abort-uploading-button"), __clickAbortUploadingButton);
+
+		tools.setOnClick($("msd-switch-to-kvm-button"), () => __clickSwitchButton("kvm"));
+		tools.setOnClick($("msd-switch-to-server-button"), () => __clickSwitchButton("server"));
+
+		tools.setOnClick($("msd-reset-button"), __clickResetButton);
+	};
+
+	/********************************************************************************/
+
+	self.loadInitialState = function() {
+		var http = tools.makeRequest("GET", "/kvmd/msd", function() {
+			if (http.readyState === 4) {
+				if (http.status === 200) {
+					self.setState(JSON.parse(http.responseText).result);
+				} else {
+					setTimeout(self.loadInitialState, 1000);
+				}
+			}
+		});
+	};
+
+	self.setState = function(state) {
+		__state = state;
+		__applyState();
+	};
+
+	var __clickUploadNewImageButton = function() {
+		var form_data = new FormData();
+		form_data.append("image_name", __image_file.name);
+		form_data.append("image_data", __image_file);
+
+		__upload_http = new XMLHttpRequest();
+		__upload_http.open("POST", "/kvmd/msd/write", true);
+		__upload_http.upload.timeout = 5000;
+		__upload_http.onreadystatechange = __uploadStateChange;
+		__upload_http.upload.onprogress = __uploadProgress;
+		__upload_http.send(form_data);
+	};
+
+	var __clickAbortUploadingButton = function() {
+		__upload_http.onreadystatechange = null;
+		__upload_http.upload.onprogress = null;
+		__upload_http.abort();
+		__upload_http = null;
+		$("msd-progress").setAttribute("data-label", "Aborted");
+		$("msd-progress-value").style.width = "0%";
+	};
+
+	var __clickSwitchButton = function(to) {
+		var http = tools.makeRequest("POST", "/kvmd/msd/connect?to=" + to, function() {
+			if (http.readyState === 4) {
+				if (http.status !== 200) {
+					ui.error("Switch error:<br>", http.responseText);
+				}
+			}
+			__applyState();
+		});
+		__applyState();
+		$("msd-switch-to-" + to + "-button").disabled = true;
+	};
+
+	var __selectNewImageFile = function() {
+		var el_input = $("msd-select-new-image-file");
+		var image_file = (el_input.files.length ? el_input.files[0] : null);
+		if (image_file && image_file.size > __state.info.size) {
+			ui.error("New image is too big for your Mass Storage Device.<br>Maximum:", __formatSize(__state.info.size));
+			el_input.value = "";
+			image_file = null;
+		}
+		__image_file = image_file;
+		__applyState();
+	};
+
+	var __clickResetButton = function() {
+		var http = tools.makeRequest("POST", "/kvmd/msd/reset", function() {
+			if (http.readyState === 4) {
+				if (http.status !== 200) {
+					ui.error("MSD reset error:<br>", http.responseText);
+				}
+			}
+			__applyState();
+		});
+		__applyState();
+	};
+
+	var __applyState = function() {
+		if (__state.connected_to === "server") {
+			$("msd-another-another-user-uploads").style.display = "none";
+			$("msd-led").className = "led-green";
+			$("msd-status").innerHTML = $("msd-led").title = "Connected to Server";
+			$("msd-another-another-user-uploads").style.display = "none";
+		} else if (__state.busy) {
+			if (!__upload_http) {
+				$("msd-another-another-user-uploads").style.display = "block";
+			}
+			$("msd-led").className = "led-yellow-rotating-fast";
+			$("msd-status").innerHTML = $("msd-led").title = "Uploading new image";
+		} else {
+			$("msd-another-another-user-uploads").style.display = "none";
+			$("msd-led").className = "led-gray";
+			if (__state.in_operate) {
+				$("msd-status").innerHTML = $("msd-led").title = "Connected to KVM";
+			} else {
+				$("msd-status").innerHTML = $("msd-led").title = "Unavailable";
+			}
+		}
+
+		$("msd-not-in-operate").style.display = (__state.in_operate ? "none" : "block");
+		$("msd-current-image-broken").style.display = (
+			__state.in_operate && __state.info.image &&
+			!__state.info.image.complete && !__state.busy ? "block" : "none"
+		);
+
+		$("msd-current-image-name").innerHTML = (__state.in_operate && __state.info.image ? __state.info.image.name : "None");
+		$("msd-current-image-size").innerHTML = (__state.in_operate && __state.info.image ? __formatSize(__state.info.image.size) : "None");
+		$("msd-storage-size").innerHTML = (__state.in_operate ? __formatSize(__state.info.size) : "Unavailable");
+
+		$("msd-switch-to-kvm-button").disabled = (!__state.in_operate || __state.connected_to === "kvm" || __state.busy);
+		$("msd-switch-to-server-button").disabled = (!__state.in_operate || __state.connected_to === "server" || __state.busy);
+		$("msd-select-new-image-button").disabled = (!__state.in_operate || __state.connected_to !== "kvm" || __state.busy || __upload_http);
+		$("msd-upload-new-image-button").disabled = (!__state.in_operate || __state.connected_to !== "kvm" || __state.busy || !__image_file);
+		$("msd-abort-uploading-button").disabled = (!__state.in_operate || !__upload_http);
+		$("msd-reset-button").disabled = (!__state.in_operate || __upload_http);
+
+		$("msd-new-image").style.display = (__image_file ? "block" : "none");
+		$("msd-progress").setAttribute("data-label", "Waiting for upload ...");
+		$("msd-progress-value").style.width = "0%";
+		$("msd-new-image-name").innerHTML = (__image_file ? __image_file.name : "");
+		$("msd-new-image-size").innerHTML = (__image_file ? __formatSize(__image_file.size) : "");
+	};
+
+	var __formatSize = function(size) {
+		if (size > 0) {
+			var index = Math.floor( Math.log(size) / Math.log(1024) );
+			return (size / Math.pow(1024, index)).toFixed(2) * 1 + " " + ["B", "kB", "MB", "GB", "TB"][index];
+		} else {
+			return 0;
+		}
+	};
+
+	var __uploadStateChange = function() {
+		if (__upload_http.readyState === 4) {
+			if (__upload_http.status !== 200) {
+				ui.error("Can't upload image to the Mass Storage Device:<br>", __upload_http.responseText);
+			}
+			$("msd-select-new-image-file").value = "";
+			__image_file = null;
+			__upload_http = null;
+			__applyState();
+		}
+	};
+
+	var __uploadProgress = function(event) {
+		if(event.lengthComputable) {
+			var percent = Math.round((event.loaded * 100) / event.total);
+			$("msd-progress").setAttribute("data-label", percent + "%");
+			$("msd-progress-value").style.width = percent + "%";
+		}
+	};
+
+	__init__();
+}

web/js/kvm/session.js

@@ -0,0 +1,129 @@
+function Session() {
+	// var self = this;
+
+	/********************************************************************************/
+
+	var __ws = null;
+
+	var __ping_timer = null;
+	var __missed_heartbeats = 0;
+
+	var __hid = new Hid();
+	var __atx = new Atx();
+	var __msd = new Msd();
+	var __streamer = new Streamer();
+
+	var __init__ = function() {
+		$("link-led").title = "Not connected yet...";
+		__loadKvmdVersion();
+		__startPoller();
+	};
+
+	/********************************************************************************/
+
+	var __loadKvmdVersion = function() {
+		var http = tools.makeRequest("GET", "/kvmd/info", function() {
+			if (http.readyState === 4) {
+				if (http.status === 200) {
+					var info = JSON.parse(http.responseText).result;
+					$("kvmd-version").innerHTML = "kvmd v" + info.version.kvmd;
+					$("about-version-kvmd").innerHTML = info.version.kvmd;
+					$("about-version-streamer").innerHTML = info.version.streamer + " (" + info.streamer + ")";
+				} else {
+					setTimeout(__loadKvmdVersion, 1000);
+				}
+			}
+		});
+	};
+
+	var __startPoller = function() {
+		$("link-led").className = "led-yellow";
+		$("link-led").title = "Connecting...";
+		var http = tools.makeRequest("GET", "/wsauth", function() {
+			if (http.readyState === 4) {
+				if (http.status === 200) {
+					__ws = new WebSocket((location.protocol === "https:" ? "wss" : "ws") + "://" + location.host + "/kvmd/ws");
+					__ws.onopen = __wsOpenHandler;
+					__ws.onmessage = __wsMessageHandler;
+					__ws.onerror = __wsErrorHandler;
+					__ws.onclose = __wsCloseHandler;
+				} else {
+					__wsCloseHandler(null);
+				}
+			}
+		});
+	};
+
+	var __wsOpenHandler = function(event) {
+		$("link-led").className = "led-green";
+		$("link-led").title = "Connected";
+		tools.debug("Session: socket opened:", event);
+		__streamer.loadInitialState();
+		__atx.loadInitialState();
+		__msd.loadInitialState();
+		__hid.setSocket(__ws);
+		__missed_heartbeats = 0;
+		__ping_timer = setInterval(__pingServer, 1000);
+	};
+
+	var __wsMessageHandler = function(event) {
+		// tools.debug("Session: received socket data:", event.data);
+		event = JSON.parse(event.data);
+		if (event.msg_type === "pong") {
+			__missed_heartbeats = 0;
+		} else if (event.msg_type === "event") {
+			if (event.msg.event === "streamer_state") {
+				__streamer.setState(event.msg.event_attrs);
+			} else if (event.msg.event === "atx_state") {
+				__atx.setState(event.msg.event_attrs);
+			} else if (event.msg.event === "msd_state") {
+				__msd.setState(event.msg.event_attrs);
+			}
+		}
+	};
+
+	var __wsErrorHandler = function(event) {
+		tools.error("Session: socket error:", event);
+		if (__ws) {
+			__ws.onclose = null;
+			__ws.close();
+			__wsCloseHandler(null);
+		}
+	};
+
+	var __wsCloseHandler = function(event) {
+		$("link-led").className = "led-gray";
+		tools.debug("Session: socket closed:", event);
+		if (__ping_timer) {
+			clearInterval(__ping_timer);
+			__ping_timer = null;
+		}
+		__streamer.clearState();
+		__atx.clearState();
+		__hid.setSocket(null);
+		__ws = null;
+		setTimeout(function() {
+			$("link-led").className = "led-yellow";
+			setTimeout(__startPoller, 500);
+		}, 500);
+	};
+
+	var __pingServer = function() {
+		try {
+			__missed_heartbeats += 1;
+			if (__missed_heartbeats >= 5) {
+				throw new Error("Too many missed heartbeats");
+			}
+			__ws.send(JSON.stringify({"event_type": "ping"}));
+		} catch (err) {
+			tools.error("Session: ping error:", err.message);
+			if (__ws) {
+				__ws.onclose = null;
+				__ws.close();
+				__wsCloseHandler(null);
+			}
+		}
+	};
+
+	__init__();
+}

web/js/kvm/stream.js

@@ -0,0 +1,232 @@
+function Streamer() {
+	var self = this;
+
+	/********************************************************************************/
+
+	var __resolution = {width: 640, height: 480};
+	var __size_factor = 1;
+	var __client_key = tools.makeId();
+	var __client_id = "";
+	var __client_fps = -1;
+	var __prev = false;
+
+	var __init__ = function() {
+		$("stream-led").title = "Stream inactive";
+
+		$("stream-quality-slider").min = 5;
+		$("stream-quality-slider").max = 100;
+		$("stream-quality-slider").step = 5;
+		$("stream-quality-slider").value = 80;
+		tools.setOnUpSlider($("stream-quality-slider"), 1000, __updateQualityValue, (value) => __sendParam("quality", value));
+
+		$("stream-desired-fps-slider").min = 0;
+		$("stream-desired-fps-slider").max = 30;
+		$("stream-desired-fps-slider").step = 1;
+		$("stream-desired-fps-slider").value = 0;
+		tools.setOnUpSlider($("stream-desired-fps-slider"), 1000, __updateDesiredFpsValue, (value) => __sendParam("desired_fps", value));
+
+		$("stream-size-slider").min = 20;
+		$("stream-size-slider").max = 200;
+		$("stream-size-slider").step = 5;
+		$("stream-size-slider").value = 100;
+		$("stream-size-slider").oninput = () => __resize();
+		$("stream-size-slider").onchange = () => __resize();
+
+		tools.setOnClick($("stream-screenshot-button"), __clickScreenshotButton);
+		tools.setOnClick($("stream-reset-button"), __clickResetButton);
+	};
+
+	/********************************************************************************/
+
+	self.loadInitialState = function() {
+		var http = tools.makeRequest("GET", "/kvmd/streamer", function() {
+			if (http.readyState === 4) {
+				if (http.status === 200) {
+					self.setState(JSON.parse(http.responseText).result);
+				} else {
+					self.clearState();
+					setTimeout(self.loadInitialState, 1000);
+				}
+			}
+		});
+	};
+
+	self.setState = function(state) {
+		if (state.state) {
+			var source = state.state.source;
+			var stream = state.state.stream;
+
+			if (!__prev) {
+				$("stream-quality-slider").activated = false;
+				$("stream-desired-fps-slider").activated = false;
+			}
+
+			if (!$("stream-quality-slider").activated) {
+				$("stream-quality-slider").disabled = false;
+				if ($("stream-quality-slider").value !== source.quality) {
+					$("stream-quality-slider").value = source.quality;
+					__updateQualityValue(source.quality);
+				}
+			}
+
+			if (!$("stream-desired-fps-slider").activated) {
+				$("stream-desired-fps-slider").disabled = false;
+				if ($("stream-desired-fps-slider").value !== source.desired_fps) {
+					$("stream-desired-fps-slider").value = source.desired_fps;
+					__updateDesiredFpsValue(source.desired_fps);
+				}
+			}
+
+			if (__resolution.width !== source.resolution.width || __resolution.height !== source.resolution.height) {
+				__resolution = source.resolution;
+				if ($("stream-auto-resize-checkbox").checked) {
+					__adjustSizeFactor();
+				} else {
+					__applySizeFactor();
+				}
+			}
+
+			var stream_client = tools.getCookie("stream_client");
+			if (!__client_id && stream_client && stream_client.startsWith(__client_key + "/")) {
+				tools.info("Stream: found acceptable stream_client cookie:", stream_client);
+				__client_id = stream_client.slice(stream_client.indexOf("/") + 1);
+			}
+
+			if (stream.clients_stat.hasOwnProperty(__client_id)) {
+				__client_fps = stream.clients_stat[__client_id].fps;
+			} else {
+				__client_fps = -1;
+			}
+
+			if (!__prev) {
+				var path = "/streamer/stream?key=" + __client_key;
+				if (tools.browser.is_chrome || tools.browser.is_blink) {
+					// uStreamer fix for Blink https://bugs.chromium.org/p/chromium/issues/detail?id=527446
+					tools.info("Stream: using advance_headers=1 to fix Blink MJPG bugs");
+					path += "&advance_headers=1";
+				} else if (tools.browser.is_safari || tools.browser.is_ios) {
+					// uStreamer fix for WebKit
+					tools.info("Stream: using dual_final_frames=1 to fix WebKit MJPG bugs");
+					path += "&dual_final_frames=1";
+				}
+				$("stream-image").src = path;
+				$("stream-image").className = "stream-image-active";
+				$("stream-box").classList.remove("stream-box-inactive");
+				$("stream-led").className = "led-green";
+				$("stream-led").title = "Stream is active";
+				$("stream-screenshot-button").disabled = false;
+				$("stream-reset-button").disabled = false;
+				tools.info("Stream: acquired");
+				__prev = true;
+			}
+
+			__updateStreamHeader(true);
+
+		} else {
+			self.clearState();
+		}
+	};
+
+	self.clearState = function() {
+		tools.info("Stream: refreshing ...");
+		$("stream-image").className = "stream-image-inactive";
+		$("stream-box").classList.add("stream-box-inactive");
+		$("stream-led").className = "led-gray";
+		$("stream-led").title = "Stream inactive";
+		$("stream-screenshot-button").disabled = true;
+		$("stream-reset-button").disabled = true;
+		$("stream-quality-slider").disabled = true;
+		$("stream-desired-fps-slider").disabled = true;
+		__client_key = tools.makeId();
+		__client_id = "";
+		__client_fps = -1;
+		__prev = false;
+		__updateStreamHeader(false);
+	};
+
+	var __updateQualityValue = function(value) {
+		$("stream-quality-value").innerHTML = value + "%";
+	};
+
+	var __updateDesiredFpsValue = function(value) {
+		$("stream-desired-fps-value").innerHTML = (value == 0 ? "Unlimited" : value);
+	};
+
+	var __updateStreamHeader = function(online) {
+		var el_grab = document.querySelector("#stream-window-header .window-grab");
+		var el_info = $("stream-info");
+		if (online) {
+			var fps_suffix = (__client_fps >= 0 ? " / " + __client_fps + " fps" : "");
+			el_grab.innerHTML = el_info.innerHTML = "Stream – " + __resolution.width + "x" + __resolution.height + fps_suffix;
+		} else {
+			el_grab.innerHTML = el_info.innerHTML = "Stream – offline";
+		}
+	};
+
+	var __clickScreenshotButton = function() {
+		var el_a = document.createElement("a");
+		el_a.href = "/streamer/snapshot";
+		el_a.target = "_blank";
+		document.body.appendChild(el_a);
+		el_a.click();
+		setTimeout(() => document.body.removeChild(el_a), 0);
+	};
+
+	var __clickResetButton = function() {
+		var http = tools.makeRequest("POST", "/kvmd/streamer/reset", function() {
+			if (http.readyState === 4) {
+				if (http.status !== 200) {
+					ui.error("Can't reset stream:<br>", http.responseText);
+				}
+			}
+		});
+	};
+
+	var __sendParam = function(name, value) {
+		var http = tools.makeRequest("POST", "/kvmd/streamer/set_params?" + name + "=" + value, function() {
+			if (http.readyState === 4) {
+				if (http.status !== 200) {
+					ui.error("Can't configure stream:<br>", http.responseText);
+				}
+			}
+		});
+	};
+
+	var __resize = function(center=false) {
+		var size = $("stream-size-slider").value;
+		$("stream-size-value").innerHTML = size + "%";
+		__size_factor = size / 100;
+		__applySizeFactor(center);
+	};
+
+	var __adjustSizeFactor = function() {
+		var el_window = $("stream-window");
+		var el_slider = $("stream-size-slider");
+		var view = ui.getViewGeometry();
+
+		for (var size = 100; size >= el_slider.min; size -= el_slider.step) {
+			tools.info("Stream: adjusting size:", size);
+			$("stream-size-slider").value = size;
+			__resize(true);
+
+			var rect = el_window.getBoundingClientRect();
+			if (
+				rect.bottom <= view.bottom
+				&& rect.top >= view.top
+				&& rect.left >= view.left
+				&& rect.right <= view.right
+			) {
+				break;
+			}
+		}
+	};
+
+	var __applySizeFactor = function(center=false) {
+		var el_stream_image = $("stream-image");
+		el_stream_image.style.width = __resolution.width * __size_factor + "px";
+		el_stream_image.style.height = __resolution.height * __size_factor + "px";
+		ui.showWindow($("stream-window"), false, center);
+	};
+
+	__init__();
+}