Truncate and Seed GWC cached layers in GeoServer

GeoServer GWC REST Example

import json
import urllib2
import base64

baseURL = "https://domain.example:8080/geoserver/gwc/rest/seed/"
descURL = "https://domain.example:8080/geoserver/gwc/rest/layers/"
un = 'username'
pw = 'biglongtrickypassword'

def truncateLayer(layer):
    print 'TRUNCATING: ' + layer
    url = baseURL + 'WORKSPACE:' + layer + '.json'
    urlDesc = descURL + 'WORKSPACE:' + layer + '.json'
    base64string = base64.encodestring('%s:%s' % (un, pw)).replace('\n', '')    
    gridsets = []
    
    #try the creative commons workspace, if not found ,try planning schemes.
    try:
        desc = urllib2.Request(urlDesc)
        desc.add_header("Authorization", "Basic %s" % base64string)        
        layerInfo = json.loads(urllib2.urlopen(desc).read())['GeoServerLayer']
        imageFormats = layerInfo['mimeFormats']
        for gridset in layerInfo['gridSubsets']:
            gridsets.append(gridset['gridSetName'])
        except:
            print 'identifying gridsets failed...'
    
    for gs in gridsets:
       print 'removing gridset: ' + gs
       for imf in imageFormats:
           print '  removing image format: ' + imf
           try:
               request = urllib2.Request(url)
               base64string = base64.encodestring('%s:%s' % (un, pw)).replace('\n', '')
               request.add_header("Authorization", "Basic %s" % base64string)
               request.add_header('Content-Type', 'application/json')
               data = {'seedRequest':{'minX':[],'minY':[],'maxX':[],'maxY':[],'gridSetId':gs,'zoomStart':00,'zoomStop':20,'format':imf,'type':'truncate','threadCount':2}}
               data = json.dumps(data)
               request.add_data(data)
               req = urllib2.urlopen(request)
               print '  success'
           except:
               print 'removing gridset failed'
               print data
               pass

def seedLayer(layer):
    url = baseURL + layer + '.json'
    request = urllib2.Request(url)
    base64string = base64.encodestring('%s:%s' % (un, pw)).replace('\n', '')
    request.add_header("Authorization", "Basic %s" % base64string)
    request.add_header('Content-Type', 'application/json')
    data = {'seedRequest':{'minX':[],'minY':[],'maxX':[],'maxY':[],'gridSetId':'EPSG:900913','zoomStart':00,'zoomStop':18,'format':'image/png','type':'seed','threadCount':2}}
    data = json.dumps(data)
    request.add_data(data)
    req = urllib2.urlopen(request)

#truncate layers
truncateLayer('examplelayer')

#seed high-use layers
seedLayer('GCC_cc:examplelayer')