Hi all,

I'm writing a Java program and want to create a case in TGB-HRApps-Work-Candidate (Pega 7 self study exercise environment). I tried some JSON combinations like:

{
"caseTypeID": "TGB-HRApps-Work-Candidate",
"processID": "pyStartCase",
"parentCaseID": "",
"content": {}
}

But all combination result in a HTTP 400 code with error:

{"pxObjClass":"Pega-API-CaseManagement-Case","errors":[ {"ID":"Pega_API_001","message":"Invalid request data","pxObjClass":"Pega-API-Error"}] }

Using the Pega API page from Developer Studio the above JSON works fine creating a new case and a HTTP 201 code!

Any idea what I'm doing wrong?

Code:

package nl.ing.pega;

import java.net.HttpURLConnection;
import java.net.URL;

public class MainPost {

    private static String payload = "{ \"caseTypeID\": \"TGB-HRApps-Work-Candidate\", \"processID\": \"pyStartCase\", \"parentCaseID\": \"\", \"content\": {} }";

    private static HttpURLConnection connection = null;

    public static void main(String[] args) {
        String requestUrl="http:// Proprietary information hidden:9080/prweb/api/v1/cases";

        System.out.println("Request:\r\n" +  payload);
        System.out.println();

        sendGetRequest(requestUrl, payload);
    }

    public static void sendGetRequest(String requestUrl, String payload) {
        try {
            URL url = new URL(requestUrl);
            connection = (HttpURLConnection) url.openConnection();

            connection.setRequestMethod("POST");

            connection.setUseCaches(false);

            connection.setDoInput(true);
            connection.setDoOutput(true);

//          connection.setRequestProperty("Accept", "application/json");
            connection.setRequestProperty("Authorization", Util.buildBasicAuthorizationString());
//          connection.setRequestProperty("Content-Type", "application/json");
//          connection.setRequestProperty("Content-Length", Integer.toString(payload.length()));

            System.out.println("HTTP code: " +  connection.getResponseCode());
            System.out.println();

            if(connection.getResponseCode() == 201) {
                System.out.println("Response:\r\n" + Util.readResponse(connection));
            }
        } catch (Exception e) {
            System.err.println("Exception:\r\n");
            System.err.println(e.getMessage());
            e.printStackTrace();
        } finally {
            if(connection!=null) {
                try {
                    if(connection.getResponseCode() == 400 ||
                       connection.getResponseCode() == 403) {
                        Thread.sleep(500);
                        System.out.print("Error response:\r\n");
                        System.out.println(Util.readResponse(connection, true));
                    }
                } catch (Exception e) {
                    System.err.println(e.getMessage());
                }
                Util.responseHeaders(connection);
                connection.disconnect();
            }
        }
    }
}

package nl.ing.pega;

import java.io.BufferedReader;
import java.io.InputStreamReader;
import java.net.HttpURLConnection;
import java.nio.charset.StandardCharsets;
import java.util.Base64;
import java.util.List;
import java.util.Map;

public class Util {

    public static String readResponse(HttpURLConnection connection) throws Exception {
        return readResponse(connection, false);
    }

    public static String readResponse(HttpURLConnection connection, boolean isError) throws Exception {
        BufferedReader br = null;
        if(isError) {
            br = new BufferedReader(new InputStreamReader(connection.getErrorStream()));
        } else {
            br = new BufferedReader(new InputStreamReader(connection.getInputStream()));
        }
        StringBuffer jsonString = new StringBuffer();
        String line = "";
        while ((line = br.readLine()) != null) {
            jsonString.append(line);
        }
        br.close();
        connection.disconnect();
        return jsonString.toString();
    }

    public static String buildBasicAuthorizationString() {
        String credentials = "admin@tgb:rules";
        return "Basic " + new String(Base64.getEncoder().encodeToString(credentials.getBytes(StandardCharsets.UTF_8)));
    }

    public static void responseHeaders(HttpURLConnection connection) {
        System.out.println("\r\nResponse header:");
        Map<String, List<String>> map = connection.getHeaderFields();
        for (Map.Entry<String, List<String>> entry : map.entrySet()) {
            System.out.println(entry.getKey() + " : " + entry.getValue());
        }
    }
}

Result:

"C:\Program Files\Java\jdk1.8.0_152\bin\java.exe" "-javaagent:C:\Program Files\JetBrains\IntelliJ IDEA Community Edition 2018.1.1\lib\idea_rt.jar=56692:C:\Program Files\JetBrains\IntelliJ IDEA Community Edition 2018.1.1\bin" -Dfile.encoding=UTF-8 -classpath "C:\Program Files\Java\jdk1.8.0_152\jre\lib\charsets.jar;C:\Program Files\Java\jdk1.8.0_152\jre\lib\deploy.jar;C:\Program Files\Java\jdk1.8.0_152\jre\lib\ext\access-bridge-64.jar;C:\Program Files\Java\jdk1.8.0_152\jre\lib\ext\cldrdata.jar;C:\Program Files\Java\jdk1.8.0_152\jre\lib\ext\dnsns.jar;C:\Program Files\Java\jdk1.8.0_152\jre\lib\ext\jaccess.jar;C:\Program Files\Java\jdk1.8.0_152\jre\lib\ext\jfxrt.jar;C:\Program Files\Java\jdk1.8.0_152\jre\lib\ext\localedata.jar;C:\Program Files\Java\jdk1.8.0_152\jre\lib\ext\nashorn.jar;C:\Program Files\Java\jdk1.8.0_152\jre\lib\ext\sunec.jar;C:\Program Files\Java\jdk1.8.0_152\jre\lib\ext\sunjce_provider.jar;C:\Program Files\Java\jdk1.8.0_152\jre\lib\ext\sunmscapi.jar;C:\Program Files\Java\jdk1.8.0_152\jre\lib\ext\sunpkcs11.jar;C:\Program Files\Java\jdk1.8.0_152\jre\lib\ext\zipfs.jar;C:\Program Files\Java\jdk1.8.0_152\jre\lib\javaws.jar;C:\Program Files\Java\jdk1.8.0_152\jre\lib\jce.jar;C:\Program Files\Java\jdk1.8.0_152\jre\lib\jfr.jar;C:\Program Files\Java\jdk1.8.0_152\jre\lib\jfxswt.jar;C:\Program Files\Java\jdk1.8.0_152\jre\lib\jsse.jar;C:\Program Files\Java\jdk1.8.0_152\jre\lib\management-agent.jar;C:\Program Files\Java\jdk1.8.0_152\jre\lib\plugin.jar;C:\Program Files\Java\jdk1.8.0_152\jre\lib\resources.jar;C:\Program Files\Java\jdk1.8.0_152\jre\lib\rt.jar;C:\Projects\IntellIJ\PegaAPICall\out\production\PegaAPICall" nl.ing.pega.MainPost
Request:
{ "caseTypeID": "TGB-HRApps-Work-Candidate", "processID": "pyStartCase", "parentCaseID": "", "content": {} }

HTTP code: 400

Error response:
{"pxObjClass":"Pega-API-CaseManagement-Case","errors":[ {"ID":"Pega_API_001","message":"Invalid request data","pxObjClass":"Pega-API-Error"}] }

Response header:
null : [HTTP/1.1 400 Bad Request]
Warning : [299  Proprietary information hidden "Use of TLS/SSL is strongly recommended for services using Basic Authentication"]
Server : [Apache-Coyote/1.1]
Connection : [close]
Set-Cookie : [JSESSIONID=48A3CB19C6CEDF31171D1E5743165DF1; Path=/prweb; HttpOnly]
Content-Length : [153]
Date : [Sat, 09 Mar 2019 17:03:05 GMT]
Content-Type : [application/json;charset=UTF-8]

Process finished with exit code 0

Thnx.

Regards,

Oene