Marius Dumitru Florea wrote: > Hi Jeremie, > > Jeremie BOUSQUET wrote: >> Hello & thx Sergiu, >> >> I changed to json content-type, and responseJSON as you proposed. >> >> I checked that my GET request is 200 OK, and in the response the JSON tab in >> Firebug shows well formed JSON. But still my json variable is empty at >> execution time ! >> By the way if I breakpoint on or before the Ajax.Request() and step over the >> code, the json variable gets properly initiated and executed. Where it's >> used afterwards, it's perfectly well formed. >> >> I also added url parameters as 'parameters' of Ajax.Request instead of >> directly in the url but no change. >> > >> Could it be a problem in the way I pass my json variable ? Declared outside >> of Ajax.Request(...) ? It must be something really stupid but I just don't >> understand ... > > Assign a default value to your json variable before making the request > then invoke the Firebug debugger in your onSuccess handler by simply > writing: > > debugger; > > before the response assignation. Refresh the page and check if your json > variable has the default value before being assigned with the JSON > response and if the response if evaluated correctly. If all this is fine > then maybe your json variable is affected elsewhere.
As you know, A in AJAX comes from Asynchronous so don't use your json variable before the response is received, i.e. before the onSuccess handler is called. > > Hope this helps, > Marius > >> Jeremie >> >> 2010/3/2 Sergiu Dumitriu <ser...@xwiki.com> >> >>> On 03/02/2010 01:15 AM, Jeremie BOUSQUET wrote: >>>> Hello, >>>> >>>> This is for something I'm trying to develop ... And I'm not sure it has >>>> something to do with XWiki, but who knows ? >>>> >>>> In a page I call a particular init() function like this : >>>> >>>> Event.observe(window, "load", init); >>>> >>>> This init() aims at loading some JSON data from another page using Ajax. >>> I >>>> was inspired by the livetable.js here :-) >>>> >>>> var json = "" >>>> var ajx=new Ajax.Request( " >>>> >>> http://localhost:8081/xwiki/bin/view/Dev/JSONProvider?xpage=plain&outputSyntax=plain >>> ", >>> >>> You should use what Prototype already offers: >>> - set the proper MIME type for the response from velocity, with >>> $response.setContentType('application/json') >>> - write well formed JSON (also include the ( and ) that you append >>> before the eval in your current code >>> - use transport.responseJSON to read the already parsed JSON data >>> >>>> {method:"get", onSuccess:function(transport) { json = >>>> eval("("+transport.responseText+")"); } >>>> } >>>> ) >>>> >>>> This Javascript is in a .js file along with other resources on the server >>>> filesystem. It is loaded with $xwiki.jsfx.use(...) . >>>> When I debug step by step using Firebug, everything is fine, "json" >>> variable >>>> contains what I expect. >>>> But when I'm not debugging and refresh the page, "json" variable is empty >>>> ... (breakpointing AFTER ajax call shows it). Though I can see in Firebug >>>> that my Ajax http request finished with a 200 OK code. >>> Can you also check the content of the response, to see if it's well >>> formed JSON? If you also set the right MIME type, then Firebug should >>> provide a tab with the JSON data of the response (depends on the actual >>> Firebug version). >>> >>>> Do you think it might be linked to the fact this method is called on page >>>> load ? I can't see how it's different than other ajax calls in xwiki ... >>> -- >>> Sergiu Dumitriu >>> http://purl.org/net/sergiu/ >>> _______________________________________________ >>> users mailing list >>> users@xwiki.org >>> http://lists.xwiki.org/mailman/listinfo/users >>> >> _______________________________________________ >> users mailing list >> users@xwiki.org >> http://lists.xwiki.org/mailman/listinfo/users > _______________________________________________ > users mailing list > users@xwiki.org > http://lists.xwiki.org/mailman/listinfo/users _______________________________________________ users mailing list users@xwiki.org http://lists.xwiki.org/mailman/listinfo/users
