Search code examples
xmlhpricot

Parse XML with hpricot, get attributes

My xml:

http://www.google.ru/ig/api?weather=Chelyabinsk

<forecast_information>
  <city data="Chelyabinsk, Province of Chelyabinsk"/>
</forecast_information>

How to get city data for example? Not inner_html, just attributes like city data, postal code etc.

Solution

  • XPath will be a big help when parsing XML. Looks like hpricot has support for it, so it's incredibly easy.

    The XPath expression to extract the data attribute inside a city element is as follows:

    /forecast_information/city/@data

    The expression says, find the attribute named data (that's what the @ sign means) inside the element named city, which is in turn inside the element named forecast_information.

    Now, the XML you linked on google.ru is more complicated than the example you posted here. To extract the same information from it, use this expression:

    //city/@data

    This expression says, find the attribute named data inside the element named city, no matter where city is in the source XML.