ht.Default.setImage('progress', {width : 150,height : 12,comps : [// 绘制背景{type : 'rect',rect : {x : 0, y : 0, width : 115, height : 12}, background : {func : function(data) {return data.a('background');}} }, // 绘制前景  { rect : {x : 0, y : 0, width : 115, height : 12}, type : function(g, rect, comp, data, view) { var width = rect.width, height = rect.height, value = data.getValue(), foreWidth = width / 100 * value; g.fillStyle = data.a('foreground'); g.fillRect(0, 0, foreWidth, height); } } ] });

var dataModel = new ht.DataModel(),node = new ht.Node();
node.setValue(0);
node.setImage('progress');
node.a('background', '#5F6870');
node.a('foreground', '#58B6DA'); node.p(85, 87); dataModel.add(node); var graphView = new ht.graph.GraphView(dataModel); graphView.addToDOM(); graphView.layout({x : 0, y : 80, width : 170, height : 30});

function setProgressValue(node) {var value = node.getValue();if (value !== 100) {node.setValue(value + 1);var second = Math.round(Math.random() * 500);setTimeout(setProgressValue, second, node);}
}

node.getValue = function() {return this._value;
};
node.setValue = function(value) {var self = this,oV = self._value;self._value = value; self.fp('value', oV, value); };

// 绘制文本
{rect : {x : 118, y : 0, width : 32, height : 12},type : 'text',text : {func : function(data) {return data.getValue() + '%';}},font : '12px arial, sans-ferif',color : 'black' }

/**** 绘制圆边矩形* @param ctx 画笔* @param x 坐标 x* @param y 坐标 y* @param width 宽度* @param height 高度* @param radius 圆角半径*/
function roundRect(ctx, x, y, width, height, radius) {ctx.beginPath();ctx.moveTo(x, y + radius);ctx.lineTo(x, y + height - radius);ctx.quadraticCurveTo(x, y + height, x + radius, y + height);ctx.lineTo(x + width - radius, y + height);ctx.quadraticCurveTo(x + width, y + height, x + width, y + height - radius); ctx.lineTo(x + width, y + radius); ctx.quadraticCurveTo(x + width, y, x + width - radius, y); ctx.lineTo(x + radius, y); ctx.quadraticCurveTo(x, y, x, y + radius); }

// 绘制圆角矩形
{rect : {x : 0, y : 0, width : 115, height : 12},type : function(g, rect, comp, data, view) {var width = rect.width, height = rect.height;roundRect(g, 0, 0, width, height, height / 2);g.clip();}
}

var express = require('express'),app = express(),server = require('http').createServer(app),io = require('socket.io')(server),path = require('path'),root = path.join(__dirname, '../../../'), formidable = require('formidable'); // io监听connection事件 io.on('connection', function(socket){ // 定义socket名称 socket.join('upload'); }); // 设置服务器的工作路径 app.use(express.static(root)); app.post('/', function(req, res){ var form = new formidable.IncomingForm(); form.on('end', function(){ res.end('upload complete!'); }); form.on('progress', function(bytesReceived, bytesExpected){ var percent = Math.floor(bytesReceived / bytesExpected * 100); // 获取指定的socket，并派发事件 io.sockets.in('upload').emit('progress', percent); }); form.parse(req); }); // 服务器监听4000端口 server.listen(3000, function(){ console.log('server is listening at port 3000'); });

<form method="post" action="/" enctype="multipart/form-data" name="fileForm"><p><input type="file" name="file"/></p><p><input type="submit" value="Upload"/></p>
</form>

var fileForm = document.forms.namedItem('fileForm');
fileForm.addEventListener('submit', function(e) {var httpRequest;if (window.XMLHttpRequest) { // Mozilla, Safari, IE7+ ...httpRequest = new XMLHttpRequest();}else if (window.ActiveXObject) { // IE 6 and olderhttpRequest = new ActiveXObject("Microsoft.XMLHTTP");}httpRequest.open('POST', '/', true); httpRequest.send(new FormData(fileForm)); socket.on('progress', function(val) { progress.setValue(val); }); e.preventDefault(); }, false);