javascript - How to get the AJAX response code using casperjs SCRAW THE AJAX content -

i wanna scrawl feedback website can't content source code , heard casperjs can return th ajax content code ,but don't code when using casperjs.

var fs = require('fs');    var casper = require('casper').create({       pagesettings: {            loadimages: false,            loadplugins: false,            javascriptenabled :true,            useragent: 'mozilla/5.0 (windows nt 6.1; wow64; rv:39.0) gecko/20100101 firefox/39.0'        },        loglevel: "debug",//日志等级        verbose: true,    // 记录日志到控制台    });        请求页面  casper.start(url, function () {          fs.write("temp.html", this.getpagecontent(), 'w');   });    casper.run(function() {          this.echo('so whole suite ended.');          this.exit();      });

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