The Django server side shows http 400 and Invalid HTTP_HOST header message

I am using HTTPHandler to send logging messages to a Django Web server with The following code,     
import logging
import logging.handlers
logger = logging.getLogger('mylogger')
http_handler = logging.handlers.HTTPHandler('localhost:8000', '/VideoParser/lYYDownloaderClientLog')#, method='POST'
logger.addHandler(http_handler)
logger.error('testing remote logging')
  but The server side shows http 400 and Invalid HTTP_HOST header message like this     
Invalid HTTP_HOST header: 'localhost:8000,localhost'. The domain name provided i
s not valid according to RFC 1034/1035.
[03/Apr/2017 19:15:41] "GET /VideoParser/lYYDownloaderClientLog?filename=a.py&th
readName=MainThread&stack_info=None&processName=MainProcess&exc_text=None&create
d=1491218139.538086&levelname=ERROR&module=a&thread=3624&exc_info=None&relativeC
reated=112.00642585754395&levelno=40&pathname=C%3A%5CUsers%5Ci%5CDocuments%5CTen
cent+Files%5C2281570025%5CFileRecv%5Ca.py&msecs=538.0859375&msg=testing+remote+l
ogging&name=mylogger&args=%28%29&lineno=12&process=6700&funcName=%3Cmodule%3E HT
TP/1.1" 400 67823
  so how to fix The issue ?    related code  django-test\LYYDownloaderServer\VideoParser\urls.py    
from django.conf.urls import url
from . import views
app_name = 'VideoParser'
urlpatterns = [
    url(r'lYYDownloaderClientLog.+',views.lYYDownloaderClientLog, name='lYYDownloaderClientLog')
]
  django-test\LYYDownloaderServer\VideoParser\views.py    
def lYYDownloaderClientLog(request):
    print('----666666666666---', request.GET)
  

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