Sending the value of a custom field via a REST Post request

[Alex van Rijs]

One of the options in Jira is to create a custom field. On transitioning a task to a certain state in my workflow I want to trigger a groovy script to send the data of this custom field via a REST Post request to an external php script.

I am using the following code: 

import com.atlassian.jira.ComponentAccessor;
import groovyx.net.http.HTTPBuilder;
import static groovyx.net.http.ContentType.URLENC;

def customFieldManager = ComponentAccessor.getCustomFieldManager();
def email = customFieldManager.getCustomFieldObjectByName('Email Adress');

// this is the check
if(issue.getCustomFieldValue(email)) 
{
    def http = new HTTPBuilder( 'http://www.example.com/Scripts/test.php' );
    def postBody = [username: 'bob']; // will be url-encoded
 
    http.post( path: '/', body: postBody, requestContentType: URLENC ) 
    { 
        resp -> println "POST Success: ${resp.statusLine}";
        assert resp.statusLine.statusCode == 201;
    }
} 
else
{
    //do nothing
}

The debug/output/error console lists the following errors after running the code:

Script2.groovy: 1: unable to resolve class com.atlassian.jira.ComponentAccessor
 @ line 1, column 1.
   import com.atlassian.jira.ComponentAccessor;
   ^

Script2.groovy: 2: unable to resolve class groovyx.net.http.HTTPBuilder
 @ line 2, column 1.
   import groovyx.net.http.HTTPBuilder;
   ^

Script2.groovy: 3: unable to resolve class groovyx.net.http.ContentType
 @ line 3, column 1.
   import static groovyx.net.http.ContentType.URLENC;
   ^

3 errors

 What is going wrong while importing the dependencies?