Is it possible to execute a REST call in JavaScript without utilizing JSON?

(I must confess, this question may show my lack of knowledge)

I have a basic webpage that consists of a button and a label. My goal is to trigger a REST call to a different domain when the button is clicked (cross-domain, I am aware) and then display the resulting HTML in the label.

In the past, I've experimented with APIs using JSON/P and dynamically adding elements, but this specific API does not support JSON. Therefore, I'm uncertain about how to proceed successfully.

The current code I am working with is:

    function getESVData() {
    $.get('http://www.esvapi.org/v2/rest/passageQuery?key=IP&passage=John+1', function (data) {
        $('#bibleText').html(data);
        app.showNotification("Note:", "Load performed.");
    });
}

However, I receive an "Access denied" error. Is there a way to make this call successfully without relying on JSON?

Answer №1

Initially, let's clarify that JSON and JSONP are not interchangeable terms. JSON serves as a method for presenting data, while JSONP operates as a workaround to bypass the same-origin policy. Essentially, JSONP functions by soliciting data from a different domain, which in turn furnishes a script calling a function (identified by a specified name) along with the data. It is crucial to acknowledge that you are essentially executing a script on your website that has been provided by another domain; therefore, placing trust in this external source is imperative.

When endeavoring towards cross-domain requests, there exist three primary approaches:

  1. Opt for JSONP. However, this technique poses constraints such as exclusively accommodating GET requests and necessitating support from the targeted server.
  2. Explore Cross-Origin Resource Sharing (CORS) requests. This alternative also mandates compatability from the target server.
  3. Establish a proxy on your personal server. In such circumstances, you configure an endpoint on your site solely designated for relaying requests; i.e., you prompt your server to obtain data from another server and deliver it back to you.

In light of your particular scenario, if the alternate server does not facilitate the other options, resorting to option 3 appears to be the most viable course of action.

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