Jquery Api Auth

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Creating full Client JWT Application in jQuery

How to call rest APIs in javascript/jquery. In this tutorial, you will learn how to call rest APIs in javascript/jquery on your web applications or web pages.

  • Request

    • If you are looking for how to consume restful web services in javascript, call rest service from HTML page, jquery rest API post, ajax API, call example, jquery API call, calling web API from jquery ajax, javascript/jQuery call rest API JSON.
      This tutorial solves your all queries related to calling APIs (web services).
    • This web services (Apis) tutorial will call Google’s free news web service (API).
      This will make it easier for you to learn how to call web service and API in JavaScript and Jquery using Ajax.
    • You might not know that Google provides free (web services) APIs for news.
      You can get the Google News API key by clicking on the link given below.

This guide walks you through writing a simple javascript/jquery to calling rest web service.

Google News Apis key:. This the google news web services (Apis). When we call Google News API and web service with the help of javascript and jquery then we will get the JSON response given below.

First, you will create the js file and in this file call the web service (apis) :.

This controller module is represented as a simple JavaScript function.
It uses jQuery’s $.ajax() method to consume the REST service at https://newsapi.org/v2/top-headlines?country=us&apiKey=e03753c9126b408d870a44318813ac3d.
If successful, it will assign the JSON received to data, effectively making it a Greeting model object.
The id and content are then appended to the news id and DOM elements respectively.
Note the use of the jQuery promise .then().

This directs jQuery to execute the anonymous function when the $.ajax() method completes, passing the data result from the completed AJAX request.

Now that you have a js, you will create the HTML page that will load the google news into the user’s web browser:.
We need to add two jQuery /JavaScript libraries inside the head tag on html web page.

The former gives jQuery. He: We have created another in which we will call Web Services / Interconnect.

We have created a div in an html web page. When calling Google’s free news API / web service, the format that will get the response, we will read in this div. Of the jquery append method ():. Open your browser and simply hit the following url into your browser:.

Description: Send data to the server using a HTTP POST request. A string containing the URL to which the request is sent. Type: PlainObject or String. A plain object or string that is sent to the server with the request. Type: Function( PlainObject data, String textStatus, jqXHR jqXHR ). A callback function that is executed if the request succeeds.

Required if dataType is provided, but can be null in that case. The type of data expected from the server. Default: Intelligent Guess (xml, json, script, text, html). Type: PlainObject. A set of key/value pairs that configure the Ajax request. All properties except for url are optional. A default can be set for any option with $.ajaxSetup().

ASP.NET Core GET JWT Token from Request

See jQuery.ajax( settings ) for a complete list of all settings. Type will automatically be set to POST. This is a shorthand Ajax function, which is equivalent to:. The success callback function is passed the returned data, which will be an XML root element or a text string depending on the MIME type of the response. It is also passed the text status of the response. As of jQuery 1.5, the success callback function is also passed a "jqXHR" object (in jQuery 1.4, it was passed the XMLHttpRequest object). Most implementations will specify a success handler:. This example fetches the requested HTML snippet and inserts it on the page.

Pages fetched with POST are never cached, so the cache and ifModified options in jQuery.ajaxSetup() have no effect on these requests. As of jQuery 1.5, all of jQuery's Ajax methods return a superset of the XMLHTTPRequest object. This jQuery XHR object, or "jqXHR," returned by $.post() implements the Promise interface, giving it all the properties, methods, and behavior of a Promise (see Deferred object for more information).

Call the API

The jqXHR.done() (for success), jqXHR.fail() (for error), and jqXHR.always() (for completion, whether success or error; added in jQuery 1.6) methods take a function argument that is called when the request terminates. For information about the arguments this function receives, see the jqXHR Object section of the $.ajax() documentation.

Calling Google News RESTful Web Service with JavaScript / jQuery

  • The Promise interface also allows jQuery's Ajax methods, including $.get(), to chain multiple .done(), .fail(), and .always() callbacks on a single request, and even to assign these callbacks after the request may have completed.
  • If the request is already complete, the callback is fired immediately.

The jqXHR.success(), jqXHR.error(), and jqXHR.complete() callback methods are removed as of jQuery 3.0.

You can use jqXHR.done(), jqXHR.fail(), and jqXHR.always() instead.
Due to browser security restrictions, most "Ajax" requests are subject to the same origin policy; the request can not successfully retrieve data from a different domain, subdomain, port, or protocol.
If a request with jQuery.post() returns an error code, it will fail silently unless the script has also called the global .ajaxError()method.
Alternatively, as of jQuery 1.5, the .error() method of the jqXHR object returned by jQuery.post() is also available for error handling.
Request the test.php page, but ignore the return results.
Request the test.php page and send some additional data along (while still ignoring the return results).
Pass arrays of data to the server (while still ignoring the return results).
Send form data using Ajax requests.
Alert the results from requesting test.php (HTML or XML, depending on what was returned).
Alert the results from requesting test.php with an additional payload of data (HTML or XML, depending on what was returned).
Post to the test.php page and get content which has been returned in json format ("John","time"=>"2pm")); ?>).
Post a form using Ajax and put results in a div.
JWT authentication is a popular standard to secure the Web API.
In my last tutorial I explained in full details about ASP.NET Core JWT Authentication and Authorization of Web API, if you haven’t read it make sure you do it now.
When you make an API Call to a JWT protected Web API then you have to add a Bearer token to the Authorization request.
This is done in jQuery as shown below.
Let us now call the Web API (that is JWT secured) with jQuery AJAX method.
The most important thing to note here is that you have to add the JWT Token value on the header of the HTTP request, and prepend the token’s value with the word – Bearer (note the space at the end of the word).
This tutorial is a part of series called JSON Web Token (JWT) in ASP.NET Core.

Explanation:

There are 3 tutorials to master it:. ASP.NET Core JWT Authentication and Authorization of Web API [Detailed].

How to call a JWT secured APIs with jQuery AJAX [with source codes]. Implementing JWT Refresh Token in ASP.NET Core MVC. This is shown in the below code:.