Jenkins Dynamic Choice Parameter script that displaces JIRA tickets to choose from

JiraSelectIssue.groovy

// Displays a Jira issue to select
import groovy.json.JsonSlurper
import hudson.model.*
import jenkins.model.*
import hudson.AbortException

def jiraRoot = ""
def jirauserName = ""
def jirapassword = ""
def searchAPI = "${jiraRoot}/rest/api/2/search?jql" // Use this base URL to perform a JQL search. Make sure to URL encode the search string
def jql = '' // Use single quotes in order to use double-quotes in string
encodedJql = java.net.URLEncoder.encode(jql, "UTF-8") // URLencode the JQL string
def searchaddr = "${searchAPI}=${encodedJql}"

println "[INFO] search = ${searchaddr}"
def authString = "${jirauserName}:${jirapassword}".getBytes().encodeBase64().toString()
def conn = searchaddr.toURL().openConnection()
if (authString.length() > 0)
{
  conn.setRequestProperty( "Authorization", "Basic ${authString}" )
}

if (conn.responseCode == 200) {
  def result = parseJSON(conn.content.text) // result will now contain an easily parseable JSON text
  def choices=[]
  result.issues.each { issue-> choices.add("${issue.key} ${issue.fields.summary}") }
  //result.issues[0].key
  //result.issues[0].fields.description
  choices
} else {
  println "Something bad happened."
  println "${conn.responseCode}: ${conn.responseMessage}"
  throw new AbortException("[ERROR] Failed to connect to Jira server")
}

// This parses the raw result and returns a parsed JSON text
def parseJSON(text)
{
  def slurper = new JsonSlurper()
  def result = slurper.parseText(text)
  return result
}