import urllib, os
class myURLOpener(urllib.FancyURLopener):
"""Create sub-class in order to overide error 206. This error means a
partial file is being sent,
which is ok in this case. Do nothing with this error.
"""
def http_error_206(self, url, fp, errcode, errmsg, headers, data=None):
pass
loop = 1
dlFile = "2.6Distrib.zip"
existSize = 0
myUrlclass = myURLOpener()
if os.path.exists(dlFile):
outputFile = open(dlFile,"ab")
existSize = os.path.getsize(dlFile)
#If the file exists, then only download the remainder
myUrlclass.addheader("Range","bytes=%s-" % (existSize))
else:
outputFile = open(dlFile,"wb")
webPage = myUrlclass.open("http://localhost/%s" % dlFile)
#If the file exists, but we already have the whole thing, don't download again
if int(webPage.headers['Content-Length']) == existSize:
loop = 0
print "File already downloaded"
numBytes = 0
while loop:
data = webPage.read(8192)
if not data:
break
outputFile.write(data)
numBytes = numBytes + len(data)
webPage.close()
outputFile.close()
for k,v in webPage.headers.items():
print k, "=",v
print "copied", numBytes, "bytes from", webPage.url
