我正在尝试按照本教程将d3.js SVG Vis转换为PNG服务器端(使用Node.js)http://eng.wealthfront.com/2011/12/converting-dynamic-svg-to- PNG-with.html
链接到完整代码: https ://gist.github.com/1509145
但是,每当我尝试发出加载页面的请求时,我都会收到此错误
/Users/me/Node/node_modules/jsdom/lib/jsdom.js:171
features = JSON.parse(JSON.stringify(window.document.implementation._fea
^
TypeError: Cannot read property 'implementation' of undefined
at exports.env.exports.jsdom.env.processHTML (/Users/dereklo/Node/node_modules/jsdom/lib/jsdom.js:171:59)
at Object.exports.env.exports.jsdom.env (/Users/dereklo/Node/node_modules/jsdom/lib/jsdom.js:262:5)
at Server.<anonymous> (/Users/dereklo/Node/Pie/pie_serv.js:26:9)
at Server.EventEmitter.emit (events.js:91:17)
at HTTPParser.parser.onIncoming (http.js:1785:12)
at HTTPParser.parserOnHeadersComplete [as onHeadersComplete] (http.js:111:23)
at Socket.socket.ondata (http.
有人知道为什么会这样吗？我已经安装了jsdom模块,所以我真的不知道是什么导致了这些问题...提前感谢.
编辑
这是我用来实现node.js服务器的代码.我的最新一期是在这个来源之下......
var http = require('http'),
url = require('url'),
jsdom = require('jsdom'),
child_proc = require('child_process'),
w = 400,
h = 400,
__dirname = "Users/dereklo/Node/pie/"
scripts = ["/Users/dereklo/Node/pie/d3.min.js",
"/Users/dereklo/Node/pie/d3.layout.min.js",
"/Users/dereklo/Node/pie/pie.js"],
//scripts = ["./d3.v2.js",
// "./d3.layout.min.js",
// "./pie.js"]
htmlStub = '<!DOCTYPE html><div id="pie" style="width:'+w+'px;height:'+h+'px;"></div>';
http.createServer(function (req, res) {
res.writeHead(200, {'Content-Type': 'image/png'});
var convert = child_proc.spawn("convert", ["svg:", "png:-"]),
values = (url.parse(req.url, true).query['values'] || ".5,.5")
.split(",")
.map(function(v){return parseFloat(v)});
convert.stdout.on('data', function (data) {
res.write(data);
});
convert.on('exit', function(code) {
res.end();
});
jsdom.env({features:{QuerySelector:true}, html:htmlStub, scripts:scripts, done:function(errors, window) {
var svgsrc = window.insertPie("#pie", w, h, values).innerHTML;
console.log("svgsrc",svgsrc);
//jsdom's domToHTML will lowercase element names
svgsrc = svgsrc.replace(/radialgradient/g,'radialGradient');
convert.stdin.write(svgsrc);
convert.stdin.end();
}});
}).listen(8888, "127.0.0.1");
console.log('Pie SVG server running at http://127.0.0.1:8888/');
console.log('ex. http://127.0.0.1:8888/?values=.4,.3,.2,.1');
最新一期
events.js:66
throw arguments[1]; // Unhandled 'error' event
^
Error: This socket is closed.
at Socket._write (net.js:519:19)
at Socket.write (net.js:511:15)
at http.createServer.jsdom.env.done (/Users/dereklo/Node/Pie/pie_serv.js:38:19)
at exports.env.exports.jsdom.env.scriptComplete (/Users/dereklo/Node/node_modules/jsdom/lib/jsdom.js:199:39)
Tre*_*xon 50
如果你拿出"使用node.js"规定,这可能证明是对你的问题有用的答案.如果它对您没有帮助,也许以后的访问者会发现它很有趣.
我已经工作了一段时间来解决同样的问题(服务器端d3光栅化),我发现PhantomJS是最好的解决方案.
server.js:
var page = require('webpage').create(),
renderElement = require('./renderElement.js'),
Routes = require('./Routes.js'),
app = new Routes();
page.viewportSize = {width: 1000, height: 1000};
page.open('./d3shell.html');
app.post('/', function(req, res) {
page.evaluate(new Function(req.post.d3));
var pic = renderElement(page, '#Viewport');
res.send(pic);
});
app.listen(8000);
console.log('Listening on port 8000.');
Routes.js:https
://gist.github.com/3061477 renderElement.js:https://gist.github.com/3176500
d3shell.html应该看起来像:
<!DOCTYPE HTML>
<html>
<head>
<title>Shell</title>
</head>
<body>
<div id="Viewport" style="display: inline-block"></div>
<script src="http://cdnjs.cloudflare.com/ajax/libs/d3/2.8.1/d3.v2.min.js" type="text/javascript"></script>
</body>
</html>
然后,您可以使用phantomjs server.jsPOST d3 = [d3代码渲染到#Viewport]启动服务器,服务器将使用base64编码的png进行响应.
(需要PhantomJS 1.7或更高版本.)
| 归档时间： |
|
| 查看次数： |
20844 次 |
| 最近记录： |