Tips for retrying Ajax requests with references and incorporating success and failure handlers

Question

Tips for retrying Ajax requests with references and incorporating success and failure handlers

I am currently testing the feasibility of storing a reference to an ajax call upon failure and then retrying the call at a later time. My attempt so far has been the following:

$.ajax({
    url: "controller/action",
    data: {
        params: "here"
    }
})
.success(function (response) {
    DoStuffHere();
})
.fail(function (error) {
    ajaxRef = this;
    DoOtherStuff();
})

Within the DoOtherStuff function, an attempt is made to make the ajax call using the stored reference:

function DoOtherStuff() {
    if(ajaxRef)
    {
        $.ajax(ajaxRef);
    }
}

This code is intentionally simplified to illustrate my objective.

It appears that the ajax call is indeed made, but the issue arises in maintaining a reference to the success or fail callbacks of the call. Consequently, when the call returns successfully, it does not execute DoStuffHere();

In my quest for a solution, I came across suggestions that indicate success by calling $.ajax(this) within the success or fail functions. However, in my scenario, there are certain prerequisite functions and ajax calls that need to run before reattempting.

Is there a way to ensure that the success and fail callbacks are retained with the reference to the ajax call?

javascript ajax

Answer 1

Answer №1

One approach you can take is to directly link the success/failure handlers to the ajax request object itself. Take a look at this implementation:

var newAjaxObj = {
    endpoint: "some/endpoint",
    data: {
        parameters: "here"
    },
    onSuccess: handleSuccess,
    onError: handleError
}

$.ajax(newAjaxObj);

function handleSuccess(response){
    doSomethingOnSuccess();
}

function handleError(error){
    doSomethingOnError();
}

function doSomethingOnError() {
    // Retry the ajax request if needed
    if(newAjaxObj){
        $.ajax(newAjaxObj);
    }
}

Answer 2

One approach you can take is to directly link the success/failure handlers to the ajax request object itself. Take a look at this implementation:

var newAjaxObj = {
    endpoint: "some/endpoint",
    data: {
        parameters: "here"
    },
    onSuccess: handleSuccess,
    onError: handleError
}

$.ajax(newAjaxObj);

function handleSuccess(response){
    doSomethingOnSuccess();
}

function handleError(error){
    doSomethingOnError();
}

function doSomethingOnError() {
    // Retry the ajax request if needed
    if(newAjaxObj){
        $.ajax(newAjaxObj);
    }
}

Answer 3

Answer №2

After some trial and error, I finally discovered the reason why this code wasn't functioning as expected. It turns out that my use of the .success() and .fail() handlers for ajax was the culprit. Strangely enough, these handlers were not persisting with the reference, causing the code to break. However, by making a simple adjustment, I was able to get it to work correctly:

$.ajax({
    url: "controller/action",
    data: {
        params: "here"
    },
    success: function (response) {
        DoStuffHere();
    },
    error: function (error) {
        ajaxRef = this;
        DoOtherStuff();
    }
})

With this modification, the code now functions as intended:

function DoOtherStuff() {
    if(ajaxRef) {
        $.ajax(ajaxRef);
    }
}

I hope this solution proves helpful to anyone facing a similar issue!

Answer 4

After some trial and error, I finally discovered the reason why this code wasn't functioning as expected. It turns out that my use of the .success() and .fail() handlers for ajax was the culprit. Strangely enough, these handlers were not persisting with the reference, causing the code to break. However, by making a simple adjustment, I was able to get it to work correctly:

$.ajax({
    url: "controller/action",
    data: {
        params: "here"
    },
    success: function (response) {
        DoStuffHere();
    },
    error: function (error) {
        ajaxRef = this;
        DoOtherStuff();
    }
})

With this modification, the code now functions as intended:

function DoOtherStuff() {
    if(ajaxRef) {
        $.ajax(ajaxRef);
    }
}

I hope this solution proves helpful to anyone facing a similar issue!

Tips for retrying Ajax requests with references and incorporating success and failure handlers

Answer №1

Answer №2

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