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Apache JMeter Regular Expressions Extractor Error

I have made an HTTP Request to a webpage and it respond successfully with a VAST code (XML) Afterwards I tried to use Apache JMeter Regular Expressions Extractor for Extracting a URL from the MediaFile tag in the responded XML code . but it doesn't work.

Here is the responded data (VAST XML): 

<?xml version="1.0" encoding="UTF-8"?>
<VAST version="2.0">
  <Ad id="brightroll_ad">
    <InLine>
      <AdSystem>BrightRoll</AdSystem>
      <AdTitle></AdTitle>
      <Impression><![CDATA[http://brxserv-22.btrll.com/v1/epix/6835714/3858435/84416/140363/AbQ93_XgMgCcRUTi_JAAFJwAACJEsAOuADAAAAAAAiyel-GCNFFg/event.imp/r_64.aHR0cDovL2Iuc2NvcmVjYXJkcmVzZWFyY2guY29tL3A_JmMxPTgmYzI9NjAwMDAwNiZjMz04NDQxNiZjND0zODU4NDM1JmM1PTIwNDYzJmM2PTY4MzU3MTQmYzEwPTE0MDM2MyZjdj0xLjcmY2o9MSZybj0xNDE0NDEwMTg1JnI9aHR0cCUzQSUyRiUyRnBpeGVsLnF1YW50c2VydmUuY29tJTJGcGl4ZWwlMkZwLWNiNkMwekZGN2RXakkuZ2lmJTNGbGFiZWxzJTNEcC42ODM1NzE0LjM4NTg0MzUuMCUyQ2EuMjA0NjMuODQ0MTYuMTQwMzYzJTJDdS45NjguNjQweDM2MCUzQm1lZGlhJTNEYWQlM0JyJTNEMTQxNDQxMDE4NQ]]></Impression>
  <Impression><![CDATA[http://rc.rlcdn.com/361686.gif]]></Impression>
  <Creatives>
    <Creative id="140363" sequence="1">
      <Linear>
        <Duration>00:00:30</Duration>
        <TrackingEvents>
          <Tracking event="midpoint"><![CDATA[http://brxserv-22.btrll.com/v1/epix/6835714/3858435/84416/140363/AbQ93_XgMgCcRUTi_JAAFJwAACJEsAOuADAAAAAAAiyel-GCNFFg/event.mid]]></Tracking>
          <Tracking event="complete"><![CDATA[http://brxserv-22.btrll.com/v1/epix/6835714/3858435/84416/140363/AbQ93_XgMgCcRUTi_JAAFJwAACJEsAOuADAAAAAAAiyel-GCNFFg/event.end]]></Tracking>
        </TrackingEvents>
        <AdParameters></AdParameters>
        <VideoClicks>
          <ClickTracking><![CDATA[http://brxserv-22.btrll.com/v1/epix/6835714/3858435/84416/140363/AbQ93_XgMgCcRUTi_JAAFJwAACJEsAOuADAAAAAAAiyel-GCNFFg/event.click]]></ClickTracking>
        </VideoClicks>
        <MediaFiles>
          <MediaFile type="application/x-shockwave-flash" apiFramework="VPAID" height="360" width="640" delivery="progressive">
            <![CDATA[http://shim.btrll.com/shim/20141023.75835_master/Scout.swf?type=VPAID&hidefb=true&asset_64=aHR0cDovL3J0ci5pbm5vdmlkLmNvbS9yMS41NDQ1OTU0ZDA5ZTY4OS40MjIxNTcxODtjYj0xNDE0NDEwMTg1O3NpdGVpZD0zODU4NDM1bGluZWl0ZW04NDQxNg&vid_click_url=&config_url_64=&h_64=YnJ4c2Vydi0yMi5idHJsbC5jb20&dn=-&e=p&p=6835714&s=3858435&l=84416&ic=140363&ii=20463&iq=t&cx=&x=AbQ93_XgMgCcRUTi_JAAFJwAACJEsAOuADAAAAAAAiyel-GCNFFg&adc=false&t=33&si=&vh_64=Z2VvLXJ0YnNlcnYtdjIuYnRybGwuY29t&apep=0.05&hbp=0.01&view=vast2]]>
          </MediaFile>
        </MediaFiles>
      </Linear>
    </Creative>
  </Creatives>
</InLine>

and Here is the settings which I have used. 

Reference Name: mediaFileUrl_VASTAdTagURI
Regular Expression: <MediaFile type="application//x-shockwave-flash" apiFramework="VPAID" height="360" width="640" delivery="progressive"><([^"]+)http:\/\/([^"]+)]]>>
Template: $1$$2$
Match No.: -1
Default Value: No mediaFileUrl_VASTAdTagURI

The result is always (No mediaFileUrl_VASTAdTagURI). any clue about the problem with the Regular Expression.

Solution

  • JMeter provides XPath Extractor to deal with XML and XHTML data. It can also work for HTML but you'll have to check Use Tidy box so JMeter could use JTidy to work against HTML.

    XPath expression to extract contents of CDATA should look something like:

    //MediaFile/text()[2]

    See XPath Tutorial for more details. Few tools which can help in building/debugging XPath expressions: