If you’re a WebOS developer and would like to be able to notify your users when a new version of your app is available, a very efficient way to do that is to use the Yahoo Query Language.
Take a look at this page:
It shows a YQL query to select the version of the app com.chofter.palmdevutils, giving the following result
{
"query": {
"count": 1,
"created": "2011-10-07T14:58:53Z",
"lang": "en-US",
"results": {
"p": "Version: 1.3.0"
}
}
}
Fetching this JSON object requires far less data that reading the entire HTML page and parsing it yourself. To see the final link that you would use, copy the link from the bottom of the Yahoo page, like this one http://query.yahooapis.com/v1/public/yql?q=select%20*%20from%20html%20where%20url%3D%22https%3A%2F%2Fdeveloper.palm.com%2Fappredirect%2F%3Fpackageid%3Dcom.chofter.palmdevutils%22%20and%0A%20%20%20%20%20%20xpath%3D’%2F%2Fdiv%5B%40id%3D%22app-price-system-version%22%5D%2Fp%5B3%5D’&format=json&callback=
