Mercurial > hg > mercurial-crew-with-dirclash

annotate mercurial/changegroup.py @ 2435:ff2bac730b99

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http client: support persistent connections. uses keepalive module from urlgrabber package. tested against "hg serve", cgi server, and through http proxy. used ethereal to verify that only one tcp connection used during entire "hg pull" sequence. if server supports keepalive, this makes latency of "hg pull" much lower.
author Vadim Gelfer <vadim.gelfer@gmail.com>
date Thu, 15 Jun 2006 12:57:59 -0700
parents 802e8a029d99
children fe1689273f84
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1981
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1 """
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2 changegroup.py - Mercurial changegroup manipulation functions
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3
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4 Copyright 2006 Matt Mackall <mpm@selenic.com>
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5
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6 This software may be used and distributed according to the terms
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7 of the GNU General Public License, incorporated herein by reference.
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8 """
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9 import struct
1997
802e8a029d99 Added missing gettext import to changegroup.py.
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10 from i18n import gettext as _
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11 from demandload import *
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12 demandload(globals(), "util")
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13
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14 def getchunk(source):
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15 """get a chunk from a changegroup"""
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16 d = source.read(4)
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17 if not d:
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18 return ""
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19 l = struct.unpack(">l", d)[0]
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20 if l <= 4:
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21 return ""
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22 d = source.read(l - 4)
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23 if len(d) < l - 4:
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24 raise util.Abort(_("premature EOF reading chunk"
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25 " (got %d bytes, expected %d)")
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26 % (len(d), l - 4))
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27 return d
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28
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29 def chunkiter(source):
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30 """iterate through the chunks in source"""
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31 while 1:
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32 c = getchunk(source)
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33 if not c:
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34 break
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35 yield c
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36
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37 def genchunk(data):
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38 """build a changegroup chunk"""
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39 header = struct.pack(">l", len(data)+ 4)
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40 return "%s%s" % (header, data)
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41
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42 def closechunk():
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43 return struct.pack(">l", 0)
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44