scrapepage.js

var args= require('system').args;
var webPage = require('webpage');
var page = webPage.create();

if(args.length <3) {
	console.log("USAGE: phantomjs.exe scrapepage.js url sql\n");
	console.log('ie.: phantomjs.exe scrapepage.js "https://news.ycombinator.com/news" "select nodeName,href,innerText from document where className=\'storylink\'"');
	phantom.exit();
}

var url= args[1];
var sql=args[2];

page.open(url, function(status) {
	page.includeJs("https://cdn.jsdelivr.net/g/js-xlsx@0.8.1(xlsx.core.min.js),alasql@0.3.5",function(){
		var result=page.evaluate(function(sql) {
			var response="";
			try {
				alasql("create table document");
				alasql.tables.document.data=[].slice.call(document.all);
				response=alasql(sql);
			} catch(e) {
				response=e.message;
			}
			return response;
		},sql);
		result = (typeof result == 'object') ? JSON.stringify(result,null,2) : result;
		console.log(result);
		phantom.exit();
	});
});