2 Mar
2010
2 Mar
'10
9:50 a.m.
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.
Hope this helps,
Marius
Jeremie
2010/3/2 Sergiu Dumitriu <sergiu(a)xwiki.com>
On 03/02/2010 01:15 AM, Jeremie BOUSQUET wrote:
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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&outpu…
",
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/
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