CODEWITHSUNDEEP
jqueryajax
Zelter Ady
Zelter Ady

Reputation: 6338

request info in ajax done callback

I'm using an Ajax request to get data from my server. The data I get come from several places (urls). I need a way to distinguish between data that comes from one url and the data coming from another url. The request is like this:

function initRequest(url)
    var request = $.ajax({
            url: url,
            contentType: 'application/json',
            dataType: 'json',
            type: "GET"
        });

        request.done(function(msg) {
            //i need to know what was the url of this request
            //request.url is undefined 
        }
}

How do I do this? I mention that I cannot use the data itself (msg) to know the source url.

Upvotes: 1

Views: 608

Answers (3)

Alnitak
Alnitak

Reputation: 339796

If the .done function is in the lexical scope of initRequest, just access the url parameter directly - it's still in scope.

Otherwise, so long as you haven't supplied an alternate context setting in the $.ajax call you can just access this.url in the .done callback - by default jQuery invokes all AJAX callbacks with the AJAX object (which happens to contain this property) as the context.

Upvotes: 1

Richard de Wit
Richard de Wit

Reputation: 7452

Since you can't modify the returned JSON, use the url of the ajax object inside the callback: 

.done(function(msg) { 
    var url = this.url; 
});

Upvotes: 1

Arun P Johny
Arun P Johny

Reputation: 388316

You can use the variable url inside the done callback because it is a closure variable

function initRequest(url)
    var request = $.ajax({
            url: url,
            contentType: 'application/json',
            dataType: 'json',
            type: "GET"
        });

        request.done(function(msg, status, xhr) {
            //you can use url here because it is a closure function
            alert(url)
        }
}

Upvotes: 1

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