Pregressively read a Jenkins job console using Python

JenkinsTailJobConsole.py

import urllib
import urllib2
import time
import sys

JENKINS_BASE = # Set to Jenkins base URL
JENKINS_JOB = # Set to Jenkins job

start = 0 # 
job_number='lastBuild'  # Get the last build
cont = True # This semaphore will be used to indicate whether or not to read more data
while cont:
    response = urllib2.urlopen(
        '{base}/{job}/{job_number}'
        '/logText/progressiveText?start={start}'.format(
            base=JENKINS_BASE, job=JENKINS_JOB,
            job_number=job_number, start=start
        )
    )

    if response.getcode() != 200:
        print('Job complete or not found')
        sys.exit(1)

    if start != response.info().get('X-Text-Size'):
        for line in response:
           print line.rstrip()
    start = response.info().get('X-Text-Size') // 

    cont = response.info().get('X-More-Data')   # Build is in progress need to request more data
    time.sleep(2) # Add some delay before requesting more data