Datasets:

dlxjj
/

DBNet

	<!DOCTYPE html>
	<html lang="en">
	<head>
	<meta http-equiv="Content-Type" content="text/html; charset=UTF-8"/>
	<meta name="viewport" content="width=device-width, initial-scale=1, maximum-scale=1.0, user-scalable=no"/>
	<title>{{title}}</title>
	<link rel="icon" href="//assets.megvii.com/static%2Ffavicon.ico?ver=1498037959257">
	<script src="//cdnjs.cloudflare.com/ajax/libs/jquery/3.2.1/jquery.min.js"></script>
	<script src="//cdnjs.cloudflare.com/ajax/libs/vue/2.2.6/vue.min.js"></script>
	</head>

	<body>
	<script language="javascript" type="text/javascript">
	var vm = null;
	function isCharacterKeyPress(evt) {
	if (typeof evt.which == "undefined") {
	// This is IE, which only fires keypress events for printable keys
	return true;
	} else if (typeof evt.which == "number" && evt.which > 0) {
	// In other browsers except old versions of WebKit, evt.which is
	// only greater than zero if the keypress is a printable key.
	// We need to filter out backspace and ctrl/alt/meta key combinations
	return !evt.ctrlKey && !evt.metaKey && !evt.altKey && evt.which != 8;
	}
	return false;
	};
	$(function() {
	vm = new Vue({
	el: '#board',
	data: {
	websocket: null,
	// resources
	delay: -1,
	data_alive: null,
	img_lst: null,
	// network
	package_size: 0,
	download_time: 0,
	net_speed: 0,
	// timer
	timer_interval: null,
	timer_step: 100,
	},
	created: function() {
	this.create_connection();
	document.addEventListener("keypress", this.send_key, false);
	},
	computed: {
	connection_alive: function() {
	return (this.websocket != null) &&
	!(this.websocket.readyState == this.websocket.CLOSING \|\| this.websocket.readyState == this.websocket.CLOSED);
	},
	},
	methods: {
	get_ws_url: function(s) {
	var l = window.location;
	return ((l.protocol === "https:") ? "wss://" : "ws://") + l.hostname + (((l.port != 80) && (l.port != 443)) ? ":" + l.port : "") + l.pathname + s;
	},
	create_connection: function() {
	this.websocket = new WebSocket(this.get_ws_url("stream"));
	this.websocket.binaryType = "arraybuffer";
	this.websocket.onopen = function(evt) { console.log("connected"); };
	this.websocket.onclose = this.close_connection;
	this.websocket.onerror = function(evt) { console.log("error occurred"); console.log(evt); };
	this.websocket.onmessage = this.receive_message;
	},
	close_connection: function() {
	console.log("disconnected");
	this.websocket = null;
	},
	receive_message: function(evt) {
	var obj = JSON.parse(evt.data);
	var send_time = obj[0], recv_time = (new Date()).getTime() / 1000;
	this.package_size = evt.data.length * 8;
	this.download_time = recv_time - send_time;
	this.net_speed = this.package_size / this.download_time;
	console.log(obj);
	this.data_alive = obj[1];
	this.delay = obj[2];
	this.img_lst = obj[3];
	this.start_timer();
	},
	send_key: function(evt) {
	if (!this.connection_alive \|\| !this.data_alive) return;
	if (!isCharacterKeyPress(evt)) return;
	this.delay = 0;
	this.data_alive = false;
	var keycode = evt.keyCode;
	console.log("key pressed " + keycode + " " + String.fromCharCode(keycode));
	this.websocket.send(keycode);
	},
	update_timer: function() {
	if (this.delay > 0) this.delay -= this.timer_step;
	if (this.delay <= 0) {
	this.data_alive = false;
	if (this.timer_interval != null) {
	clearInterval(this.timer_interval);
	this.timer_interval = null;
	}
	}
	},
	start_timer: function() {
	if (this.timer_interval != null) {
	clearInterval(this.timer_interval);
	this.timer_interval = null;
	}
	if (this.delay > 0) this.timer_interval = setInterval(this.update_timer, this.timer_step);
	},
	},
	filters: {
	decimal: function(num, fixed_point) {
	return num.toFixed(fixed_point);
	},
	},
	});
	});
	</script>

	{% raw %}
	<!-- Vue template -->
	<div id="board">
	<template v-if="connection_alive">
	<template v-if="data_alive">
	<p v-if="delay > 0">Press any key in {{delay / 1000 \| decimal(1)}} seconds. </p>
	<p v-else>Press any key to continue. </p>
	</template>
	<template v-else>
	<p>Waiting for response from server. </p>
	</template>
	</template>
	<template v-else>
	<p>Disconnected from server. </p>
	</template>
	<p>Network: {{net_speed / 1000000 \| decimal(2)}} MB/s * {{download_time \| decimal(2)}} s = {{package_size / 1000000 \| decimal(2)}} MB</p>
	<div style="display:inline-block">
	<div style="display:inline-block; vertical-align: top;" v-for="obj in img_lst">
	<p>{{obj[0]}}</p>
	<img :src="'data:image/png;base64,' + obj[1]" />
	</div>
	</div>
	</div>
	{% endraw %}

	</body>
	</html>