view mercurial/httprangereader.py @ 2821:2e4ace008c94

mq: new commands qselect, qguard

implement quilt-style guards for mq.

guards allow to control whether patch can be pushed.

if guard X is active and patch is guarded by +X (called "posative guard"),
patch can be pushed.  if patch is guarded by -X (called "nagative guard"),
patch cannot be pushed and is skipped.

use qguard to set/list guards on patches.  use qselect to set/list
active guards.

also "qseries -v" prints guarded patches with "G" now.

# httprangereader.py - just what it says
#
# Copyright 2005 Matt Mackall <[e-mail]>
#
# 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 - 1
        req.add_header('Range', 'bytes=%d-%s' % (self.pos, end))
        f = urllib2.urlopen(req)
        data = f.read()
        if bytes:
            data = data[:bytes]
        return data