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
完整代码链接: https ://gist.github.com/1509145
但是,每当我尝试请求加载我的页面时,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?我已经很好地安装了 jsdom 模块,所以我真的不知道是什么导致了这些问题……在此先感谢。
编辑
这是我用来实现 node.js 服务器的代码。我的最新一期在此来源下方...
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)