1. How To Communicate With Rest Api Js In Java
2. Rest Api Tutorial

For now, let's start creating our secure REST API using Node.js! Time, and a new token is recreated every few minutes to keep the communication secure.

I have an HTML page with a button on it. When I click on that button, I need to call a REST Web Service API. I tried searching online everywhere. No clue whatsoever. Can someone give me a lead/Headstart on this? Very much appreciated.

Arpit Parasana

How To Communicate With Rest Api Js In Java

Shaik Syed AliShaik Syed Ali

7 Answers

I'm surprised nobody has mentioned the new Fetch API, supported by all browsers except IE11 at the time of writing. It simplifies the XMLHttpRequest syntax you see in many of the other examples.

The API includes a lot more, but start with the fetch() method. It takes two arguments:

1. A URL or an object representing the request.
2. Optional init object containing the method, headers, body etc.

Simple GET:

Recreating the previous top answer, a POST:

Your Javascript:

Your Button action::

For more info go through the following link (Updated 2017/01/11)

AbhishekAbhishek

Here is another Javascript REST API Call with authentication using json:

I think add if (this.readyState 4 && this.status 200) to wait is better:

martinwang1985

Rest Api Tutorial

martinwang1985

Before we try to put anything on the front end of the website, let's open a connection the API. We'll do so using XMLHttpRequest objects, which is a way to open files and make an HTTP request.

We'll create a request variable and assign a new XMLHttpRequest object to it. Then we'll open a new connection with the open() method - in the arguments we'll specify the type of request as GET as well as the URL of the API endpoint. The request completes and we can access the data inside the onload function. When we're done, we'll send the request.
// Create a request variable and assign a new XMLHttpRequest object to it. var request = new XMLHttpRequest()

Usual way is to go with PHP and ajax. But for your requirement, below will work fine.

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