def download(cap,ui):
	"""
		Downloads cap, it will try all the urls untill one works.
	"""

	if os.path.exists(cap.capname+".cap"):
		if integrity(cap):
			return True
		else:
			os.remove(cap.capname+".cap")

	chunkSize=1024*8
	succeeded=False
	for url in cap.urls:
		try:
			opener = urllib2.build_opener()
			opener.addheaders = [('User-agent', 'cap-python/'+version)]
			u=opener.open(url)
			totalSize = float(u.headers['content-length'])

			sizeString = "%.2f Bytes" % (totalSize * 1.00)
			if totalSize > 1024:
				sizeString = "%.2f Kb" % (totalSize/1024.00)
			if totalSize > (1048576):
				sizeString = "%.2f Mb" % (totalSize/1048576.00)
			if totalSize > (1073741824):
				sizeString = "%.2f Gb ahh!" % (totalSize/1073741824.00)

			if not ui.downloadProgress(0, 0, cap.capname+'.cap',sizeString):
				return False

			if totalSize > 0:
				f=open(cap.capname+".cap",'w')
				current=0

				while current <= totalSize:
					f.write(u.read(chunkSize))
					if not ui.downloadProgress(int(100.00*(current/totalSize)), 1, file,totalSize):
						return False
					current+=chunkSize
				if not ui.downloadProgress(0, 2, file,totalSize):
					return False

				f.close()

			u.close()
			succeeded=True
			break

		except urllib2.HTTPError, e:
			if not ui.downloadProgress(0, -1, cap.capname,0):
				return False
			if e.code == 404:
				errors.append("download error: '"+url+"' not found ( 404 ).")
			elif e.code == 403:
				errors.append("download error: Cannot access '"+url+"', permission denied ( 403 )")
			else:
				errors.append("urlib2 error: "+e.code)

	return succeeded