1. #1
    Sencha Premium Member
    Join Date
    May 2007
    Location
    USA
    Posts
    73
    Vote Rating
    0
    notjoshing is on a distinguished road

      0  

    Default Unanswered: How do I get jsonp proxy callbacks to work?

    Unanswered: How do I get jsonp proxy callbacks to work?


    Using Ext 4.0.2a I'm having a problem adding a callback to my jsonp proxy:

    PHP Code:
    Ext.define('pipeline.store.PipelineSearch', {
        
    extend 'Ext.data.Store',
        
    listeners   : {
            
    exception : function() {
                
    Ext.Msg.alert('Error',arguments);
            }
        },
        
    model   'pipeline.model.PipelineSearch',
        
    proxy  : {
            
    type        'jsonp',
            
    callbackKey 'test',
            
    callback    : function(data) {
                
    console.log('data='+data);
            },
            
    // there seems to be a bug currently causing a reader config to not be
            // instanciated into a reader object. I therefore instanciate a
            // reader object rather than reader : { root: ...}
            
    reader      : new Ext.data.reader.Json({
                
    root  'itemsList.item',
                
    model 'pipeline.model.PipelineSearch'
            
    }),
            
    root        'itemsList.item',
            
    url         '...'
        
    }
    }); 
    Running this in FF, I see this error in Firebug:
    Code:
    JSONPCallback is not defined
    [Break On This Error] JSONPCallback ( {"itemsList": {
    Removing the callbackKey allows the proxy to work normally, but without the callback. I tried creating a JSONPCallback function to see what would happen. It gets called, but the store never receives the data.

    Any ideas on what might be wrong or how to troubleshoot/fix this?

    Thanks,

    Josh
    Using:
    ExtJS 2.2, 3.2, 4.0.7a
    WinXP SP3
    FF10,6; IE6; IE8; Safari

  2. #2
    Sencha User skirtle's Avatar
    Join Date
    Oct 2010
    Location
    UK
    Posts
    3,338
    Answers
    498
    Vote Rating
    248
    skirtle has much to be proud of skirtle has much to be proud of skirtle has much to be proud of skirtle has much to be proud of skirtle has much to be proud of skirtle has much to be proud of skirtle has much to be proud of skirtle has much to be proud of skirtle has much to be proud of skirtle has much to be proud of

      0  

    Default


    I'm confused about what you're trying to do.

    As far as I can tell, the JSON-P proxy doesn't support a callback option.

    In a JSON-P context, the 'callback' usually refers to the function used to wrap the data. It's a fundamental part of the mechanism used to communicate between the server and client, not a custom function you can provide. If you're unclear about how this works I'd suggest reading the introduction here:

    http://docs.sencha.com/ext-js/4-0/#!...ta.proxy.JsonP

    The callbackKey must use the same value that the server is expecting. You can't just set it to an arbitrary value like test. It specifies the name of a request parameter. This request parameter is used to tell the server the name of the callback function. If you use the wrong value then the server will probably just use a default function name (which seems to be JSONPCallback in your example).

Thread Participants: 1

film izle

hd film izle

film sitesi

takipci kazanma sitesi

takipci kazanma sitesi

güzel olan herşey

takipci alma sitesi

komik eğlenceli videolar