Re: [xwiki-users] Strange ajax + json issue
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 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=plainoutputSyntax=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/
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Re: [xwiki-users] Strange ajax + json issue
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=plainoutputSyntax=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/
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Re: [xwiki-users] Strange ajax + json issue
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=plainoutputSyntax=plain;,
{method:get,onSuccess:function(transport) { json =
eval((+transport.responseText+)); }
}
)
Wait, do you use json here, after the new Ajax.Request? You can't do
that. You should put the code using json inside the onSuccess handler.
Alternatively, you can add
asynchronous: false,
to the list of parameters to make the call synchronous, which means that
the new Ajax.Request line will block until the response arrives. But
this is bad for several reasons: in most of the current browsers it
blocks the entire browser until the response arrives, so if the server
is slow to respond, you'll lock the user outside the browser; the method
might fail, so onSuccess will not be called, and json will still have
the wrong value.
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.
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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Re: [xwiki-users] Strange ajax + json issue
Yes, the purpose was to use json var after the Ajax.Request() block ...
Understood, I will make a function of the rest of the code and pass in the
onSuccess, thanks.
I tried the asynchronous:false with no different result, but I would have to
test again to be sure.
Thx,
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=plainoutputSyntax=plain
,
{method:get,onSuccess:function(transport) { json =
eval((+transport.responseText+)); }
}
)
Wait, do you use json here, after the new Ajax.Request? You can't do
that. You should put the code using json inside the onSuccess handler.
Alternatively, you can add
asynchronous: false,
to the list of parameters to make the call synchronous, which means that
the new Ajax.Request line will block until the response arrives. But
this is bad for several reasons: in most of the current browsers it
blocks the entire browser until the response arrives, so if the server
is slow to respond, you'll lock the user outside the browser; the method
might fail, so onSuccess will not be called, and json will still have
the wrong value.
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.
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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Re: [xwiki-users] Strange ajax + json issue
Great thank you, you were right - executing everything in onSuccess() solved
my issue ! :)
I'm working on integrating JavaScript InfoVis Toolkit
http://thejit.org/with XWiki - at least some graphs. So now I can
successfully display an
hyperbolic tree in a wiki page with json data provided from another page :)
My primary intent was to display parent-child relation-ships using a
SpaceTree, a bit like the MindMap snippet.
Thanks again for your help Sergiu,
Jeremie
2010/3/2 Jeremie BOUSQUET jeremie.bousq...@gmail.com
Yes, the purpose was to use json var after the Ajax.Request() block ...
Understood, I will make a function of the rest of the code and pass in the
onSuccess, thanks.
I tried the asynchronous:false with no different result, but I would have
to test again to be sure.
Thx,
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=plainoutputSyntax=plain
,
{method:get,onSuccess:function(transport) { json =
eval((+transport.responseText+)); }
}
)
Wait, do you use json here, after the new Ajax.Request? You can't do
that. You should put the code using json inside the onSuccess handler.
Alternatively, you can add
asynchronous: false,
to the list of parameters to make the call synchronous, which means that
the new Ajax.Request line will block until the response arrives. But
this is bad for several reasons: in most of the current browsers it
blocks the entire browser until the response arrives, so if the server
is slow to respond, you'll lock the user outside the browser; the method
might fail, so onSuccess will not be called, and json will still have
the wrong value.
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.
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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Re: [xwiki-users] Strange ajax + json issue
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=plainoutputSyntax=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
Re: [xwiki-users] Strange ajax + json issue
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 ...
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=plainoutputSyntax=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/
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Re: [xwiki-users] Strange ajax + json issue
Hello,
Can't it be a timing problem ? When using Firebug, the system has time to
retrieve result from the AJAX request but at execution time it has not ?
-Message d'origine-
De : users-boun...@xwiki.org [mailto:users-boun...@xwiki.org]
De la part de Jeremie BOUSQUET
Envoyé : mardi 2 mars 2010 08:30
À : XWiki Users
Objet : Re: [xwiki-users] Strange ajax + json issue
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 ...
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=pl
ainoutputSyntax=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/
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