Does anyone know how to get data from a Labview web service with ajax or JSON?

[Eran1965]

Hi

There is no poblem to run this web services with a labview vi or directly with the browser. The problem is the parserror I get when I use jquery(javascript).

Attached is a zip file with the project and the html files

Thanks...Eran

[mikeporter]

Ahhh... so its specifically a jquery problem.

I did that once, but don't have the code with me. I'll look for it tonight. In the mean time do some checking with the jquery support forums.

Mike...

[Eran1965]

Thanks

[Andreas-Zeiner]

Hi there, i think i've got exactly the same problem.

i've a vi running as webservice which should output just plain json, which is ok when i run it via browser.

when i use it in jquery - nothing happens, the response is empty although other non-labview json sources are working.

i can only guess what this really is but maybe someone has a clue, this really gives me headache!

thanks a lot

andy

[Eran1965 · Accepted solution]

I found the cause for the problems

You can not add header("Access-Control-Allow-Origin: *") when you build the webservice (in the servere side)

You can get json with labview but you can not get JSON (from labview webservice) with javascript code

[Andreas-Zeiner]

it is def. the sop problem and after putting the whole stuff onto the NI webserver it worked. i'm currently trying to get jsonp to work - i found some NI document were they refer to jsonp and therefore i hope this will work out!