Here, we will
call the RESTful API from javascript.
Suppose there
is a RESTful API which URL is: http://localhost:8083/
And I want to save employee information using Javascript.
We will call
the above API using “POST” method.
There is a
button in html page which. When I will click this button it will save the employee
information. Data is being sent in JSON format.
Here I am
using “XMLHttpRequest” to call RESTful API.
1. Testing.html
<!DOCTYPE html>
<html>
<head>
<meta name="viewport" content="width=device-width, initial-scale=1">
<title></title>
</head>
<body ng-controller='loaderCtrl'>
<input type="button" value="Submit" onclick="saveDetails()" />
<script src="testing.js"></script>
</body>
</html>
2. testing.js
var sendRequest = function (config, method) {
if (!config) return;
var ajaxHandler = new Object();
if (window.XMLHttpRequest) {
ajaxHandler.ajaxReq = new XMLHttpRequest();
}
else if (window.ActiveXObject) {
ajaxHandler.ajaxReq = new ActiveXObject('Microsoft.XMLHTTP');
}
ajaxHandler.ajaxResponse = function () {
// Only
if req shows "complete"
var readyState, status;
readyState =
ajaxHandler.ajaxReq.readyState;
if (readyState == 4) {
status =
ajaxHandler.ajaxReq.status;
}
if (readyState == 4) {
if (status == 200) {
document.writeln(ajaxHandler.ajaxReq.responseText);// here response will come success
} else {
document.writeln(ajaxHandler.ajaxReq.responseText);// here response will come
show failed message
}
}
}
ajaxHandler.ajaxReq.onreadystatechange =
ajaxHandler.ajaxResponse;
ajaxHandler.ajaxReq.open(method, "http://localhost:8083/saveEmployeeDetail", true); // second parameter is the
URl of the REST API
ajaxHandler.ajaxReq.setRequestHeader("Content-type", "application/json;charset=UTF-8");
//ajaxHandler.ajaxReq.headers
= { "Authorization": "Basic " + btoa("admin:admin")
};
ajaxHandler.ajaxReq.send(JSON.stringify(config));
}
function saveDetails() {
var config = {
"empID": 1001,
"firstName": "Shshi Bhooshan",
};
sendRequest(config, "POST");
}
Hope this is helpful example for you. Leave your comment and provide
your suggestion if any.
