How to build a job using the REST API and Java?

• 

  Bhaskar Polipilli

  • June 24, 2017 10:27

  Hi,

  I have tried the above solution and am getting the below exception

  java.io.IOException: Server returned HTTP response code: 403 for URL: http://localhost:8080/job/samplejob/build
  at sun.net.www.protocol.http.HttpURLConnection.getInputStream0(Unknown Source)
  at sun.net.www.protocol.http.HttpURLConnection.getInputStream(Unknown Source)
  at com.itaf.majesco.jenkinsclient.JenkinsConnection.main(JenkinsConnection.java:25)

  I have installed jenkins on my machine, created a sample job "samplejob" and would like to build this job programatically.

  Below is the source which I am trying to execute:

  package com.sample.jenkinsclient;

  import java.io.BufferedReader;
  import java.io.InputStream;
  import java.io.InputStreamReader;
  import java.net.HttpURLConnection;
  import java.net.URL;

  import javax.xml.bind.DatatypeConverter;

  public class JenkinsConnection {

  public static void main(String[] args) {
  try {
  URL url = new URL ("http://localhost:8080/job/samplejob/build"); // Jenkins URL localhost:8080, job named 'test'
  String user = "admin"; // username
  String pass = "d546aece82de38a55c2f84bcdeb7a334"; // password or API token
  String authStr = user +":"+ pass;
  String encoding = DatatypeConverter.printBase64Binary(authStr.getBytes("utf-8"));

  HttpURLConnection connection = (HttpURLConnection) url.openConnection();
  connection.setRequestMethod("POST");
  connection.setDoOutput(true);
  connection.setRequestProperty("Authorization", "Basic " + encoding);
  InputStream content = connection.getInputStream();
  BufferedReader in =
  new BufferedReader (new InputStreamReader (content));
  String line;
  while ((line = in.readLine()) != null) {
  System.out.println(line);
  }
  } catch(Exception e) {
  e.printStackTrace();
  }

  }

  }

   

   

  Any help would be appreciated !!!

  0
• 

  Denys Digtiar

  • June 26, 2017 00:13

  Hi Bhaskar Polipilli,

  The HTTP response code is "Forbidden". Either Authentication or Authorization failed, i.e. either credentials are not right or the user is not permitted to build the "samolejob". You need to figure out which is the case and make appropriate adjustments.

  0
• 

  Mrityunjay Choudhary

  • August 31, 2017 21:34

  I am getting the same 403 error from Java code. When I Checked from Shell using cURL it threw the same 403 error. When researched a bit more, found out "Jenkins uses the "Prevent Cross Site Request Forgery exploits" security option (which it should), when you make a POST request, you have to send a CSRF protection token as an HTTP request header." Sorce: https://wiki.jenkins.io/display/JENKINS/Remote+access+API   (check CSRF Protection)
  
  As mentioned here, I generated crumb and added to the cURL, it worked perfectly fine. How can I add the crumb from Java code. 
  

  Please let know if anyone got this working with Java.

  0
• 

  Carlos Rodriguez Lopez

  • April 06, 2018 08:34

  You might get the crumb and build the job in the same call with something like this

  curl --user $USER:$APITOKEN -H $(curl --user $USER:$APITOKEN [-H "CRUB"] $SERVER/crumbIssuer/api/xml?xpath=concat\(//crumbRequestField,%22:%22,//crumb\))  $SERVER/job/hello-world-flow/build?token=codebase&cause=push

  0
• 

  Venkatesh Kona

  • June 01, 2018 04:45

  Hi,

   

  How to build a job with multiple parameters?

  In my scenario, i need to provide 4 parameters while build the job. Could you please provide your support asap.

   

  Thanks

  Venkatesh

  0
• 

  Sachin Vasdev

  • June 12, 2018 20:03

  Hey Venkatesh,

   

  I need to do the same thing did you find anything?

  0
• 

  Allan Burdajewicz

  • June 13, 2018 06:15

  Hi @Sachin @Venkatesh,

  The java example shows how to pass a single parameter. The parameter is defined at the line:

  String urlParams="paramA=123";

  If you wish to pass several parameters, you would need to add them as following:

  String urlParams="paramA=123&paramB=456";

  This is equivalent to the following REST API call:

  curl -XPOST --user developer:developer http://localhost:8080/job/test/buildWithParameters?paramA=123\&paramB=456

  0
• 

  Shirsak Sahoo

  • August 17, 2018 06:24

  Pass API token instead of password in the java API. It should work.

  0
• 

  Samrat Shaw

  • September 19, 2018 01:17

  You can have a look at the below article for programmatically retrieving Jenkins REST API Token.

  https://medium.com/@samratshaw/programmatically-retrieve-jenkins-rest-api-token-f2c3f0d69483

  0
• 

  Denys Digtiar

  • September 19, 2018 01:25

  Yes, since 2.107.1 the CSRF crumb is not required if REST API is made using the API Token instead of a password.

  0

Please sign in to leave a comment.