Java client program to consume REST call with authorization

Question

I need to invoke a REST call from Java code.

I have credentials in the form of

1. Id
2. Security Key

An algorithm provided which

1. Gets the server time

2. Using Id, security key & server time it generates a security token

Now authorization is in the below form

"Authorization": "name id=Id, serverTime=serverTime, securitytoken=securitytoken"

Need a java client program to invoke this REST call using above authorization header.

I am getting

HTTP Response 401 error.

Please provide correct way to set authorization header in request for form

Name Id="Id",serverTime="2017-11-18T05:51:05",securityToken="TOKEN"

Code:

package com.rest.client;

import java.io.BufferedReader;

import java.io.InputStreamReader;

import java.net.HttpURLConnection;

import java.net.URL;

public class Sample {

    public final static String GATEWAY_ID = "Id";

    public final static String KEY = "Key";

    public static void main(String[] args) {

        try {

            HttpURLConnection conn;

            conn = (HttpURLConnection) new URL("https://domain/A/B/72968").openConnection();

            String serverTime = "2017-11-18T10:51:05";

            String securityToken = "TOKEN"; 

            String authorization = "Name Id=\"" + GATEWAY_ID + "\",serverTime=\"" + serverTime + "\",securityToken=\""
                    + securityToken + "\"";

            // Name Id="Id",serverTime="2017-11-18T10:51:05",securityToken="TOKEN"

            conn.addRequestProperty("Authorization", authorization); // Is Header set is correct? It should be part of Request Header. Please correct this

            int status = conn.getResponseCode();

            System.out.println(status);

            BufferedReader br = null;

            StringBuilder body = null;

            String line = "";

            br = new BufferedReader(new InputStreamReader(conn.getInputStream()));

            body = new StringBuilder();

            while ((line = br.readLine()) != null) {
                body.append(line);
            }

            System.out.println(body);

        } catch (Exception exception) {
            exception.printStackTrace();
        }
    }

}

Error:

java.io.IOException: Server returned HTTP response code: 401 for URL: https://domain/A/B/72968 at sun.reflect.NativeConstructorAccessorImpl.newInstance0(Native Method) at sun.reflect.NativeConstructorAccessorImpl.newInstance(NativeConstructorAccessorImpl.java:62) at sun.reflect.DelegatingConstructorAccessorImpl.newInstance(DelegatingConstructorAccessorImpl.java:45) at java.lang.reflect.Constructor.newInstance(Constructor.java:423) at sun.net.www.protocol.http.HttpURLConnection$10.run(HttpURLConnection.java:1926) at sun.net.www.protocol.http.HttpURLConnection$10.run(HttpURLConnection.java:1921) at java.security.AccessController.doPrivileged(Native Method) at sun.net.www.protocol.http.HttpURLConnection.getChainedException(HttpURLConnection.java:1920) at sun.net.www.protocol.http.HttpURLConnection.getInputStream0(HttpURLConnection.java:1490) at sun.net.www.protocol.http.HttpURLConnection.getInputStream(HttpURLConnection.java:1474) at sun.net.www.protocol.https.HttpsURLConnectionImpl.getInputStream(HttpsURLConnectionImpl.java:254) at com.rest.client.ApplicationClient.main(ApplicationClient.java:48) Caused by: java.io.IOException: Server returned HTTP response code: 401 for URL: https://domain/A/B/72968 at sun.net.www.protocol.http.HttpURLConnection.getInputStream0(HttpURLConnection.java:1876) at sun.net.www.protocol.http.HttpURLConnection.getInputStream(HttpURLConnection.java:1474) at java.net.HttpURLConnection.getResponseCode(HttpURLConnection.java:480) at sun.net.www.protocol.https.HttpsURLConnectionImpl.getResponseCode(HttpsURLConnectionImpl.java:338) at com.rest.client.ApplicationClient.main(ApplicationClient.java:38)

Answer 1

try format authorization string this way "Basic Base64". try

 authorization ="Basic "+new String(new Base64().encode(authorization.getBytes()));
    conn.setRequestProperty("Authorization", authorization);