Don't abort when backup files already exist. Don't allow alternative names.
Rationale:
- When the user wants to revert, he shouldn't be stopped from doing
this just because some old backups will be overwritten.
- To not clobber important files by accident, alternative names for backup
files were disabled. As the backup target now has a fixed name, the user
doesn't have to be informed about the backup copy (unless --verbose)
# httprangereader.py - just what it says
#
# Copyright 2005 Matt Mackall <mpm@selenic.com>
#
# This software may be used and distributed according to the terms
# of the GNU General Public License, incorporated herein by reference.
import byterange, urllib2
class httprangereader(object):
def __init__(self, url):
self.url = url
self.pos = 0
def seek(self, pos):
self.pos = pos
def read(self, bytes=None):
opener = urllib2.build_opener(byterange.HTTPRangeHandler())
urllib2.install_opener(opener)
req = urllib2.Request(self.url)
end = ''
if bytes: end = self.pos + bytes
req.add_header('Range', 'bytes=%d-%s' % (self.pos, end))
f = urllib2.urlopen(req)
return f.read()