Java API Call

import java.io.BufferedReader;
import java.io.IOException;
import java.io.InputStreamReader;
import java.io.OutputStream;
import java.net.HttpURLConnection;
import java.net.MalformedURLException;
import java.net.URL;
import java.util.List;

public class AdAstraApi {

private String BaseUrl;
 private String ResponderUrl;
 private String responderParameters;

/*
 *Constructor sets BaseUrl, ResponderUrl and ResponderParameters properties
 */

public AdAstraApi() {
 this.BaseUrl = "https://www.aaiscloud.com/INSTANCE/"; //TODO: change this to your instance URL
 this.ResponderUrl = "~api/calendar/calendarList?action=get";
 this.responderParameters = "fields=Event.Name%2C+ContactLastName%3AEventMeetingByActivityId.Event.PrimaryCustomerContact.Person.LastName%2C+ContactFirstName%3AEventMeetingByActivityId.Event.PrimaryCustomerContact.Person.FirstName%2C+EventMeetingByActivityId.Event.Customer.Name%2C+BuildingCode%2C+RoomNumber%2C+EventMeetingByActivityId.Event.EventType.Name%2C+EventMeetingByActivityId.Event.EventMeetings.Name%2C+StartDate%2C+EndDate%2C+StartMinute%2C+EndMinute%2C+Description%2C+Event.IsFeatured%2C+Event.IsPrivate&filter=%28%28StartDate%3E%3D%222019-08-06T00%3A00%3A00.000Z%22%29%26%26%28EndDate%3E%3D%222019-08-27T00%3A00%3A00.000Z%22%29%26%26%28EndDate%3C%3D%222019-09-03T00%3A00%3A00.000Z%22%29%29";
 }

public String Login() throws MalformedURLException, IOException {
 /*
 * Open an HTTP Connection to the Logon.ashx page
 */

HttpURLConnection httpcon = (HttpURLConnection) ((new URL(BaseUrl+"Logon.ashx").openConnection()));
 httpcon.setDoOutput(true);
 httpcon.setRequestProperty("Content-Type", "application/json");
 httpcon.setRequestProperty("Accept", "application/json");
 httpcon.setRequestMethod("POST");
 httpcon.connect();

/*
 * Output user credentials over HTTP Output Stream
 */

byte[] outputBytes = "{'username': 'USERNAME_HERE', 'password':'PASSWORD_HERE'}".getBytes("UTF-8");
 //TODO: change this to the username and password set up for your site, preferably one specifically for API calls
 OutputStream os = httpcon.getOutputStream();
 os.write(outputBytes);
 os.close();
 /*
 * Call Function setCookie and pass the HttpUrlConnection. Set Function
 * will return a Cookie String used to authenticate user.
 */

return setCookie(httpcon);
 }

 

public String setCookie(HttpURLConnection httpcon) {
 /*
 * Process the HTTP Response Cookies from successful credentials
 */
 List<String> cookieHeaders = httpcon.getHeaderFields().get("Set-Cookie");
 String cookie = "";
 for (String cookieEntry : cookieHeaders){
 cookie += cookieEntry.substring(0,cookieEntry.indexOf(";")+1);
 }
 httpcon.disconnect();
 return cookie;
 }

public void ApiResponder(String cookie) throws MalformedURLException, IOException {

/*
 * Create a new HTTP Connection request to responder, pass along Session_ID Cookie
 */

HttpURLConnection httpcon = (HttpURLConnection) ((new URL(this.BaseUrl+this.ResponderUrl).openConnection()));
 httpcon.setDoOutput(true);
 httpcon.setRequestProperty("Content-Type", "application/x-www-form-urlencoded");
 httpcon.setRequestProperty("Accept", "application/json");
 httpcon.setRequestProperty("Cookie", cookie);
 httpcon.setRequestMethod("POST");
 httpcon.connect();

byte[] outputBytes = responderParameters.getBytes("UTF-8");
 OutputStream os = httpcon.getOutputStream();
 os.write(outputBytes);
 os.close();

/*
 * Read/Output response from server
 */

BufferedReader inreader = new BufferedReader(new InputStreamReader(httpcon.getInputStream()));
 String decodedString;
 while ((decodedString = inreader.readLine()) != null) {
 System.out.println(decodedString);
 }

inreader.close();
 httpcon.disconnect();
 }

 

public static void main(String[] args) throws Exception {
 AdAstraApi api = new AdAstraApi();
 System.out.println(api.Login());
 api.ApiResponder(api.Login());
 }
}