Modify jquery $.get function response

Question

I have used the $.get function in many cases in my project:

$.get(user, function (data) {
   // CODE
});

Now, i want to modify it to:

   $.get(user, function (data) {
         if (validate_data(data)){
             // CODE
         }
    });

but it is impossible to go to every single javascript file in project and modify all the instances. Is it possible to modify the jquery.js file instead to get the same result?

Yes, it is possible but I'd probably avoid it. Instead look for ajaxComplete kinda solution. — artm
– artm, Commented Sep 18, 2014 at 9:29

Proviste · Accepted Answer · 2014-09-18 09:29:39Z

2

You might be able to pull something by using

$.ajaxComplete(function(data) { ... } )

answered Sep 18, 2014 at 9:29

Proviste

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3 Comments

iCollect.it Ltd Over a year ago

Dangerous to add that sort of validation code generically to all Ajax requests. What about breaking other plugins that use Ajax?

Proviste Over a year ago

@trueblueaussi that's true indeed. you would have to take care of the potential collateral damages by checking the nature of your data and the origin of your request

enb081 Over a year ago

I don't want the same Success function for all my get requests, I just want to do a validation before.

Krzysiek · Accepted Answer · 2014-09-18 10:00:01Z

1

As I know you can handle data before success and use throw to stop script. Not the best solution but should works.

jQuery.ajaxSettings.dataFilter = function(response, type){
    if (!validate_data(response)){
        throw "Stop!";
    }
    return response;
}

edited Sep 18, 2014 at 10:00

answered Sep 18, 2014 at 9:35

Krzysiek

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2 Comments

enb081 Over a year ago

If validate_data returns true, the code in the original $.get function does not get fired.

Krzysiek Over a year ago

Sorry I forgot about return.

Timm · Accepted Answer · 2014-09-18 09:36:49Z

1

I think the easiest way to do so is to extend jQuery (not tested):

jQuery.fn.extend({
    get_validated: function(url, callback) {
        return $.get(url, function(data) {
            if(validateData(data)) {
                callback(data);
            }
        }
    }
});

and then replace every occasion of get with get_validated with the command replace in files in your IDE.

answered Sep 18, 2014 at 9:36

Timm

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Comments

Ronak Patel · Accepted Answer · 2014-09-18 10:02:53Z

1

You can attach a callback function using ajaxComplete to the ajax request as below

$( document ).ajaxComplete(function( event, xhr, settings ) {
  if ( settings.url === "MY GET URL" ) { //IF URL matches the one that you need
  $( ".log" ).text( "Triggered ajaxComplete handler. The result is " +
  xhr.responseText );
  }
});

The only limitation of this trick is that you must have something in your call so that you can identify that it's get call of which you want to validate the response

answered Sep 18, 2014 at 10:02

Ronak Patel

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