// GET

def get = new URL("https://httpbin.org/get").openConnection();

def getRC = get.getResponseCode();

println(getRC);

if (getRC.equals(200)) {

    println(get.getInputStream().getText());

}

​

// POST

def post = new URL("https://httpbin.org/post").openConnection();

def message = '{"message":"this is a message"}'

post.setRequestMethod("POST")

post.setDoOutput(true)

post.setRequestProperty("Content-Type", "application/json")

post.getOutputStream().write(message.getBytes("UTF-8"));

def postRC = post.getResponseCode();

println(postRC);

if (postRC.equals(200)) {

    println(post.getInputStream().getText());

}