如何使用casperjs从嵌入式脚本中检索文本？

Question

the html element is

<script>
window.sawXmlIslandidClientStateXml="<nqw xmlns:saw=\x22com.siebel.analytics.web/report/v1.1\x22 xmlns:xsi=\x22http://www.w3.org/2001/XMLSchema-instance\x22 xmlns:sawst=\x22com.siebel.analytics.web/state/v1\x22>\u003csawst:clientState>\u003csawst:stateRef>\u003csawst:envState xmlns:sawst=\"com.siebel.analytics.web/state/v1\" xmlns:xsi=\"http://www.w3.org/2001/XMLSchema-instance\" xmlVersion=\"200811100\">\u003csawst:container cid=\"d:dashboard\" xsi:type=\"sawst:topLevelStateContainer\">\u003csawst:container cid=\"p:mco0pb0nob7sqjvg\" xsi:type=\"sawst:page\">\u003csawst:container cid=\"s:42263r43nih80fd1\" xsi:type=\"sawst:section\" rendered=\"true\">\u003csawst:container cid=\"g:c452lvndqssjqa45\" xsi:type=\"sawst:dashprompt\" links=\"-\" promptAutoCompleteState=\"off\"/>\u003c/sawst:container>\u003csawst:container cid=\"r:q4g2fiisnvk4nusv\" xsi:type=\"sawst:report\" links=\"fd\" defaultView=\"compoundView!1\" searchId=\"fvup02s9lt0o6urkplv4pqa5ri\" folder=\"/shared/Sales\" itemName=\"All Sales and Inventory Data\"/>\u003csawst:container cid=\"f:dpstate\" xsi:type=\"sawst:dashpromptstate\" statepoolId=\"ih2bj24l46bkgt558qsef04jeq\"/>\u003csawst:container cid=\"s:b0003tc6gnahvsfq\" xsi:type=\"sawst:section\" rendered=\"true\"/>\u003csawst:container cid=\"s:c5j314uterctfb08\" xsi:type=\"sawst:section\" rendered=\"true\"/>\u003c/sawst:container>\u003c/sawst:container>\u003c/sawst:envState>\u003c/sawst:stateRef>\u003csawst:reportXmlRefferedTo>\u003cref statePath=\"d:dashboard~p:mco0pb0nob7sqjvg~r:q4g2fiisnvk4nusv\" searchID=\"8oh8erup3kcqav10ukp36jaof2\">\u003c/ref>\u003c/sawst:reportXmlRefferedTo>\u003c/sawst:clientState></nqw>";
</script>

I want to retrieve the string ih2bj24l46bkgt558qsef04jeq under the identifier statepoolId from this script section. So how do I find this script in the HTML and get the string using casperjs?

Answer 1

Accessing window.sawXmlIslandidClientStateXml :

This is a script element in a page which adds a variable to the global scope, so you can simply access it through casper.evaluate :

casper.then(function(){
    var sawXmlIslandidClientStateXml = casper.evaluate(function(){
        return window.sawXmlIslandidClientStateXml;
    });
    // TODO: do something
});

Doing something with sawXmlIslandidClientStateXml :

You could

• do simple string operations to split the string in a more manageable pieces that can be parsed easier by yourself,
• write a Regex matcher to find the specific detail you're looking for, or
• use a DOMParser to parse the string as XML and then use either yourParsedDocument.querySelector or yourParsedDocument.evaluate to locate the element through CSS selectors or XPath expressions, respectively.