AJAX call inside SPINx function

[ing.anton...@gmail.com]

Hi all,

Im wondering if is possible to implement an AJAX GET or POST call inside a SPINx function.

I tried this but is not working:

var url = MYLOCALURL

var params = MYPARAMS;

http.open("GET", url, true);

//Send the proper header information along with the request

http.setRequestHeader("Content-type", "application/x-www-form-urlencoded");

http.setRequestHeader("Content-length", params.length);

http.setRequestHeader("Connection", "close");

http.onreadystatechange = function() {//Call a function when the state changes.

if(http.readyState == 4 && http.status == 200) {

return (http.responseText);

}

}

http.send(params);

Also wondering if we can implement JAVA code using SPINx

Thanks

Antonino Lo Bue

[Holger Knublauch]

Hi Antonino,

the JavaScript support in TopBraid's SPINx feature is based on Mozill Rhino, so the first thing to check would be whether Rhino supports such http requests. My second suspicion is that the function below would not work because it doesn't block on read - it sends out the request and then finishes, while the return statement is in a callback that is called asynchronously. So overall I don't think JavaScript would work for your scenario.

To issue GET requests as part of SPARQL functions, you have several other options, including definition of functions using SPARQLMotion (which can then call sml:PostRequest or sml:ImportTextFromURL etc) and functions based on SWP. But these require TBC-ME (I can provide details if you can confirm that TBC-ME is an option for you).

The ultimate fallback is to use SPARQL functions based on Java, against the Jena API. Details can be found at

    Extending TopBraid Suite > Adding SPARQL Functions to TopBraid

in the TBC Help.

HTH
Holger

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[ing.anton...@gmail.com]

Thanks a lot Holger