mercurial/httprangereader.py
author Bryan O'Sullivan <bos@serpentine.com>
Fri, 23 Sep 2005 00:06:49 -0700
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Merge with MPM.
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# httprangereader.py - just what it says
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#
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# Copyright 2005 Matt Mackall <mpm@selenic.com>
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#
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# This software may be used and distributed according to the terms
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# of the GNU General Public License, incorporated herein by reference.
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import byterange, urllib2
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class httprangereader:
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    def __init__(self, url):
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        self.url = url
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        self.pos = 0
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    def seek(self, pos):
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        self.pos = pos
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    def read(self, bytes=None):
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        opener = urllib2.build_opener(byterange.HTTPRangeHandler())
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        urllib2.install_opener(opener)
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        req = urllib2.Request(self.url)
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        end = ''
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        if bytes: end = self.pos + bytes
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        req.add_header('Range', 'bytes=%d-%s' % (self.pos, end))
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        f = urllib2.urlopen(req)
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        return f.read()