Use curl in java without third party libraries

curl is a command line tool which is used to transfer data to and from server. For example, following command can be used to get oAuth token using curl command -

curl -u user:’password https://token.auth.xxx.com/

o/p - xxxxaaf9-zzzz-4be7-xyz6-xxxxxxxxxx

Here is the example of executing curl from java without using any third party library -

import java.io.BufferedReader;

import java.io.IOException;

import java.io.InputStream;

import java.io.InputStreamReader;

import java.net.URL;

import java.net.URLConnection;

public class CurlTest {

public static void main(final String[] args) throws IOException {

URL url = new URL("https://token.xxx.com/");

URLConnection uc = url.openConnection();

String userPass = "tarun" + ":" + "xxx";

String basicAuth = "Basic " + javax.xml.bind.DatatypeConverter.printBase64Binary(userPass.getBytes());

uc.setRequestProperty("Authorization", basicAuth);

InputStream in = uc.getInputStream();

BufferedReader reader = new BufferedReader(new InputStreamReader(in, "UTF-8")))

for (String line; (line = reader.readLine()) != null;) {

System.out.println(line);

}

}

}