Camunda Rest API with Authentication on

[suresh.t...@gmail.com]

Hi,
I am able to call Rest API with out any Problem when user Authentication is off. I got Authentication required error when i removed comments related to authentication on in Rest-engine web.xml and below Client code i used.

DefaultHttpClient dhc = new DefaultHttpClient();

dhc.getCredentialsProvider().setCredentials(new AuthScope(AuthScope.ANY_HOST, AuthScope.ANY_PORT, AuthScope.ANY_REALM), new UsernamePasswordCredentials("demo", "demo"));

AuthCache authCache = new BasicAuthCache();
// Generate BASIC scheme object and add it to the local auth cache
BasicScheme basicAuth = new BasicScheme();
authCache.put(new HttpHost("localhost", 8080, "http"), basicAuth);

// Add AuthCache to the execution context
BasicHttpContext localcontext = new BasicHttpContext();
localcontext.setAttribute(ClientContext.AUTH_CACHE, authCache);
HttpGet hp =new HttpGet("http://localhost:8080/engine-rest/engine/engine/process-definition");
try{
HttpResponse processResponse = dhc.execute(hp,localcontext);
BufferedReader br = new BufferedReader(
new InputStreamReader((processResponse.getEntity().getContent())));

String output;
System.out.println("Output from Server .... \n");
while ((output = br.readLine()) != null) {
System.out.println(output);
}

dhc.getConnectionManager().shutdown();
}
catch(Exception e){

e.printStackTrace();
}

Please provide me solution for this.

regards,
suresh

[Christian Lipphardt]

Hi Suresh,

below code works with authentication. It is based on 

    <dependency>

      <groupId>org.apache.httpcomponents</groupId>

      <artifactId>httpclient</artifactId>

      <version>4.3.3</version>

    </dependency>

    CredentialsProvider credentialsProvider = new BasicCredentialsProvider();

    credentialsProvider.setCredentials(AuthScope.ANY, new UsernamePasswordCredentials("demo", "demo"));

    AuthCache authCache = new BasicAuthCache();

    // Generate BASIC scheme object and add it to the local auth cache

    authCache.put(new HttpHost("localhost", 8080, "http"), new BasicScheme());

    HttpClientContext context = HttpClientContext.create();

    context.setCredentialsProvider(credentialsProvider);

    context.setAuthCache(authCache);

    HttpClientBuilder httpClientBuilder = HttpClientBuilder.create();

    HttpClient client = httpClientBuilder.build();

    HttpGet hp = new HttpGet("http://localhost:8080/engine-rest/engine/default/process-definition");

    try{

      HttpResponse processResponse = client.execute(hp, context);

      BufferedReader br = new BufferedReader(

          new InputStreamReader((processResponse.getEntity().getContent())));

      String output;

      System.out.println("Output from Server .... \n");

      while ((output = br.readLine()) != null) {

        System.out.println(output);

      }

    }

    catch(Exception e){

      e.printStackTrace();

    }

Cheers,

Christian

[suresh.t...@gmail.com]

Hi Chris,
Thank you for providing Information. I tested with below code and now i am able to Authenticate. If password is wrong than i am getting error message with big html data. Instead of this is there anyway to return json data with proper error when user name or password wrong.

regards,
suresh