com.interswitch.techquest.auth.helpers.Passport Maven / Gradle / Ivy

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package com.interswitch.techquest.auth.helpers;

import com.fasterxml.jackson.core.type.TypeReference;
import com.fasterxml.jackson.databind.ObjectMapper;
import com.interswitch.techquest.auth.Interswitch;

import java.io.BufferedReader;
import java.io.DataOutputStream;
import java.io.InputStreamReader;
import java.net.HttpURLConnection;
import java.net.InetSocketAddress;
import java.net.Proxy;
import java.net.URL;
import java.util.HashMap;
import java.util.Map;

import org.bouncycastle.util.encoders.Base64;

/**
 *
 * @author Abiola.Adebanjo
 */
public class Passport {

    public static HashMap getClientAccessToken(String clientId, String clientSecret, String passportBaseUrl) throws Exception {
    	
    	HashMap responseMap = new HashMap();
    	
    	String passportUrl = passportBaseUrl + Interswitch.PASSPORT_RESOURCE_URL;
    	String accesToken = null;
    	URL obj = new URL(passportUrl);

        System.setProperty("http.maxRedirects", "100");
        java.net.CookieManager cm = new java.net.CookieManager();
        java.net.CookieHandler.setDefault(cm);

        HttpURLConnection con = (HttpURLConnection) obj.openConnection();
        con.setRequestMethod("POST");
        String basicAuthCipher = clientId + ":" + clientSecret;
        String basicAuth = new String(Base64.encode(basicAuthCipher.getBytes()));

        con.setRequestProperty("Content-Type", "application/x-www-form-urlencoded");
        con.setRequestProperty("Authorization", "Basic " + basicAuth);
        String request = "grant_type=client_credentials";

        con.setDoOutput(true);
        DataOutputStream wr = new DataOutputStream(con.getOutputStream());
        wr.writeBytes(request);
        wr.flush();
        wr.close();

        BufferedReader in = null;
        try {
            in = new BufferedReader(new InputStreamReader(con.getInputStream()));
        } catch (Exception ex) {
            in = new BufferedReader(new InputStreamReader(con.getErrorStream()));
        }

        String inputLine;
        StringBuffer response = new StringBuffer();
        while ((inputLine = in.readLine()) != null) {
            response.append(inputLine);
        }
        in.close();

        int responseCode = con.getResponseCode();
        if (responseCode == 200) {
            ObjectMapper mapper = new ObjectMapper();
            Map map = new HashMap();
            map = mapper.readValue(response.toString(),
                    new TypeReference>() {
            });

            accesToken = map.get("access_token");
        }
        
        responseMap.put(Interswitch.RESPONSE_CODE, String.valueOf(responseCode));
		responseMap.put(Interswitch.RESPONSE_MESSAGE, response.toString());
		responseMap.put(Interswitch.ACCESS_TOKEN, accesToken);

        return responseMap;
    }
}