How to send POST request using JSON format

This time I will show you how to use JSON format to send POST requests, and what are the precautions for using JSON format to send POST requests. The following is a practical case, let's take a look.

var us = new US();
var xhr = new XMLHttpRequest();
xhr.open("POST", "/searchguard/api/v1/auth/login", true);
xhr.setRequestHeader("Content-type", "application/json");
xhr.setRequestHeader("kbn-version", "5.3.0");
xhr.onreadystatechange = function() {
if (xhr.readyState == 4) {
if (xhr.status == 200) {
window.location.href = us.nextUrl;
}
}
};
xhr.send(JSON.stringify({
"username" : us.u,
"password" : us.p
}));

I believe you have mastered the method after reading the case in this article. For more exciting information, please pay attention to other related articles on the php Chinese website!

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