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POHow to create DOM object from html page received over XMLHttpRequest?
 

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  1. POHow to create DOM object from html page received over XMLHttpRequest?
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    <p><strong>I'm developing a chromium extension so I have cross-host permissions for XMLHttpRequests for the domains I'm asking permissions for.</strong></p> <p>I have used XMLHttpRequest and got an HTML webpage (txt/html). I want to use XPath (document.evaluate) to extract relevant bits from it. Unfortunatly I'm failing to construct a DOM object from the returned string of the html.</p> <pre><code>var xhr = new XMLHttpRequest(); var name = escape("Sticks N Stones Cap"); xhr.open("GET", "http://items.jellyneo.net/?go=show_items&amp;name="+name+"&amp;name_type=exact", true); xhr.onreadystatechange = function () { if (xhr.readyState == 4) { var parser = new DOMParser(); var xmlDoc = parser.parseFromString(xhr.responseText,"text/xml"); console.log(xmlDoc); } } xhr.send(); </code></pre> <p><code>console.log</code> is to display debug stuff in Chromium JS console.</p> <p>In the said JS console. I get this:</p> <pre><code>Document &lt;html&gt;​ &lt;body&gt;​ &lt;parsererror style=​"display:​ block;​ white-space:​ pre;​ border:​ 2px solid #c77;​ padding:​ 0 1em 0 1em;​ margin:​ 1em;​ background-color:​ #fdd;​ color:​ black"&gt;​ &lt;h3&gt;​This page contains the following errors:​&lt;/h3&gt;​ &lt;div style=​"font-family:​monospace;​font-size:​12px"&gt;​error on line 1 at column 60: Space required after the Public Identifier ​&lt;/div&gt;​ &lt;h3&gt;​Below is a rendering of the page up to the first error.​&lt;/h3&gt;​ &lt;/parsererror&gt;​ &lt;/body&gt;​ &lt;/html&gt;​ </code></pre> <p>So how am I suppose to use XMLHttpRequest -> receive HTML -> convert to DOM -> use XPath to transverse?</p> <p>Should I be using the "hidden" iframe hack for loading / receiving DOM object?</p>
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      1. USPaul Sweatte
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    1. COI use the IFRAME technique to load HTML in our web app. It is fast and works well even on IE8. And when you are in the DOM, you can use CSS selectors instead of Xpath.
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      1. USMic
    2. CO@Mic thanks. I'll try to hack that up. It's just I'm doing screen-scrapping of data from a few pages and XPath is a true wonder =) allows you to get all the similar looking data from any table, etc.
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      1. USDima
    3. COCSS selectors are for HTML what Xpath is for XML, but a bit more human :)
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      1. USMic
 

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