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urllib2.urlopen Progress bar

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Hi,

In urllib.urlretrieve I can use reporthook to implement a progress bar.

But in urllib2.urlopen I can't.
I have to use urllib2.urlopen because it throws exceptions which are
important to be handled where as urlretrieve is dumb.

Is there a way to implement urllib2.urlopen to enable reporthook ?

progress.py code:

#!/usr/bin/env python

import time, urllib2, urllib

class progressBar:
def __init__(self, minValue = 0, maxValue = 10, totalWidth=12):
self.progBar = "[]" # This holds the progress bar string
self.min = minValue
self.max = maxValue
self.span = maxValue - minValue
self.width = totalWidth
self.amount = 0 # When amount == max, we are 100% done
self.updateAmount(0) # Build progress bar string

def updateAmount(self, newAmount = 0):
if newAmount < self.min: newAmount = self.min
if newAmount > self.max: newAmount = self.max
self.amount = newAmount

# Figure out the new percent done, round to an integer
diffFromMin = float(self.amount - self.min)
percentDone = (diffFromMin / float(self.span)) * 100.0
percentDone = round(percentDone)
percentDone = int(percentDone)

# Figure out how many hash bars the percentage should be
allFull = self.width - 2
numHashes = (percentDone / 100.0) * allFull
numHashes = int(round(numHashes))

# build a progress bar with hashes and spaces
self.progBar = "[" + '#'*numHashes + ' '*(allFull-numHashes) + "]"

# figure out where to put the percentage, roughly centered
percentPlace = (len(self.progBar) / 2) - len(str(percentDone))
percentString = str(percentDone) + "%"

# slice the percentage into the bar
#self.progBar = self.progBar[0:percentPlace] + percentString +
self.progBar[percentPlace+len(percentString):]
self.progBar = self.progBar[0:percentPlace] +
self.progBar[percentPlace+len(percentString):] + percentString

def __str__(self):
return str(self.progBar)

def myReportHook(count, blockSize, totalSize):
import sys
global prog

if prog == "":
prog = progressBar(0,totalSize,50)
#print count, blockSize, totalSize
#prog = progressBar(0, totalSize, 77)
prog.updateAmount(count*blockSize)
sys.stdout.write (str(prog))
sys.stdout.write ("\r")
#print count * (blockSize/1024) , "kb of " , (totalSize/1024) , "kb
downloaded.\n"
prog = ""
sFile = "new.rpm"
sUrl="http://localhost/new.rpm"
urllib.urlretrieve(sUrl, sFile, reporthook=myReportHook)
print "\n\n"
#temp = urllib2.urlopen(sUrl)
#lastval = int(temp.headers['Content-Length'])
#prog = progressBar(0, lastval, 77)
#
#for x in range(101):
# prog.updateAmount(x)
# print prog, "\r", time.sleep(0.5)
#
#data = open(sFile,'wb')
#data.write(temp.read())
#data.close()
#temp.close()
Regards,
Ritesh
- --
Ritesh Raj Sarraf
RESEARCHUT -- http://www.researchut.com
Gnupg Key ID: 04F130BC
"Stealing logic from one person is plagiarism, stealing from many is
research."
"Necessity is the mother of invention."
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Jan 15 '06 #1
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