Mercurial > hg
annotate hgext/largefiles/proto.py @ 30181:7356e6b1f5b8
util: increase filechunkiter size to 128k
util.filechunkiter has been using a chunk size of 64k for more than 10 years,
also in years where Moore's law still was a law. It is probably ok to bump it
now and perhaps get a slight win in some cases.
Also, largefiles have been using 128k for a long time. Specifying that size
multiple times (or forgetting to do it) seems a bit stupid. Decreasing it to
64k also seems unfortunate.
Thus, we will set the default chunksize to 128k and use the default everywhere.
author | Mads Kiilerich <madski@unity3d.com> |
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date | Fri, 14 Oct 2016 01:53:15 +0200 |
parents | 29139be0ccc7 |
children | 2add671bf55b |
rev | line source |
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15168 | 1 # Copyright 2011 Fog Creek Software |
2 # | |
3 # This software may be used and distributed according to the terms of the | |
4 # GNU General Public License version 2 or any later version. | |
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5 from __future__ import absolute_import |
15168 | 6 |
7 import os | |
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8 import re |
15168 | 9 |
10 from mercurial.i18n import _ | |
11 | |
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12 from mercurial import ( |
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13 error, |
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14 httppeer, |
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15 util, |
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16 wireproto, |
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17 ) |
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18 |
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19 from . import ( |
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20 lfutil, |
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21 ) |
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22 |
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23 urlerr = util.urlerr |
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24 urlreq = util.urlreq |
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25 |
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26 LARGEFILES_REQUIRED_MSG = ('\nThis repository uses the largefiles extension.' |
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27 '\n\nPlease enable it in your Mercurial config ' |
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28 'file.\n') |
15168 | 29 |
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30 # these will all be replaced by largefiles.uisetup |
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31 capabilitiesorig = None |
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32 ssholdcallstream = None |
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33 httpoldcallstream = None |
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34 |
15168 | 35 def putlfile(repo, proto, sha): |
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36 '''Server command for putting a largefile into a repository's local store |
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37 and into the user cache.''' |
15168 | 38 proto.redirect() |
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39 |
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40 path = lfutil.storepath(repo, sha) |
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41 util.makedirs(os.path.dirname(path)) |
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42 tmpfp = util.atomictempfile(path, createmode=repo.store.createmode) |
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43 |
15168 | 44 try: |
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45 proto.getfile(tmpfp) |
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46 tmpfp._fp.seek(0) |
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47 if sha != lfutil.hexsha1(tmpfp._fp): |
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48 raise IOError(0, _('largefile contents do not match hash')) |
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49 tmpfp.close() |
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50 lfutil.linktousercache(repo, sha) |
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51 except IOError as e: |
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52 repo.ui.warn(_('largefiles: failed to put %s into store: %s\n') % |
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53 (sha, e.strerror)) |
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54 return wireproto.pushres(1) |
15168 | 55 finally: |
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56 tmpfp.discard() |
15168 | 57 |
58 return wireproto.pushres(0) | |
59 | |
60 def getlfile(repo, proto, sha): | |
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61 '''Server command for retrieving a largefile from the repository-local |
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62 cache or user cache.''' |
15168 | 63 filename = lfutil.findfile(repo, sha) |
64 if not filename: | |
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65 raise error.Abort(_('requested largefile %s not present in cache') |
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66 % sha) |
15168 | 67 f = open(filename, 'rb') |
68 length = os.fstat(f.fileno())[6] | |
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69 |
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70 # Since we can't set an HTTP content-length header here, and |
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71 # Mercurial core provides no way to give the length of a streamres |
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72 # (and reading the entire file into RAM would be ill-advised), we |
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73 # just send the length on the first line of the response, like the |
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74 # ssh proto does for string responses. |
15168 | 75 def generator(): |
76 yield '%d\n' % length | |
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77 for chunk in util.filechunkiter(f): |
15168 | 78 yield chunk |
79 return wireproto.streamres(generator()) | |
80 | |
81 def statlfile(repo, proto, sha): | |
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82 '''Server command for checking if a largefile is present - returns '2\n' if |
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83 the largefile is missing, '0\n' if it seems to be in good condition. |
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84 |
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85 The value 1 is reserved for mismatched checksum, but that is too expensive |
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86 to be verified on every stat and must be caught be running 'hg verify' |
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87 server side.''' |
15168 | 88 filename = lfutil.findfile(repo, sha) |
89 if not filename: | |
90 return '2\n' | |
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91 return '0\n' |
15168 | 92 |
93 def wirereposetup(ui, repo): | |
94 class lfileswirerepository(repo.__class__): | |
95 def putlfile(self, sha, fd): | |
96 # unfortunately, httprepository._callpush tries to convert its | |
97 # input file-like into a bundle before sending it, so we can't use | |
98 # it ... | |
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99 if issubclass(self.__class__, httppeer.httppeer): |
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100 res = self._call('putlfile', data=fd, sha=sha, |
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101 headers={'content-type':'application/mercurial-0.1'}) |
15168 | 102 try: |
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103 d, output = res.split('\n', 1) |
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104 for l in output.splitlines(True): |
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105 self.ui.warn(_('remote: '), l) # assume l ends with \n |
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106 return int(d) |
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107 except ValueError: |
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108 self.ui.warn(_('unexpected putlfile response: %r\n') % res) |
15168 | 109 return 1 |
110 # ... but we can't use sshrepository._call because the data= | |
111 # argument won't get sent, and _callpush does exactly what we want | |
112 # in this case: send the data straight through | |
113 else: | |
114 try: | |
115 ret, output = self._callpush("putlfile", fd, sha=sha) | |
116 if ret == "": | |
117 raise error.ResponseError(_('putlfile failed:'), | |
118 output) | |
119 return int(ret) | |
120 except IOError: | |
121 return 1 | |
122 except ValueError: | |
123 raise error.ResponseError( | |
124 _('putlfile failed (unexpected response):'), ret) | |
125 | |
126 def getlfile(self, sha): | |
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127 """returns an iterable with the chunks of the file with sha sha""" |
15168 | 128 stream = self._callstream("getlfile", sha=sha) |
129 length = stream.readline() | |
130 try: | |
131 length = int(length) | |
132 except ValueError: | |
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133 self._abort(error.ResponseError(_("unexpected response:"), |
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134 length)) |
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135 |
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136 # SSH streams will block if reading more than length |
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137 for chunk in util.filechunkiter(stream, limit=length): |
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138 yield chunk |
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139 # HTTP streams must hit the end to process the last empty |
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140 # chunk of Chunked-Encoding so the connection can be reused. |
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141 if issubclass(self.__class__, httppeer.httppeer): |
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142 chunk = stream.read(1) |
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143 if chunk: |
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144 self._abort(error.ResponseError(_("unexpected response:"), |
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145 chunk)) |
15168 | 146 |
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147 @wireproto.batchable |
15168 | 148 def statlfile(self, sha): |
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149 f = wireproto.future() |
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150 result = {'sha': sha} |
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151 yield result, f |
15168 | 152 try: |
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153 yield int(f.value) |
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154 except (ValueError, urlerr.httperror): |
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155 # If the server returns anything but an integer followed by a |
15168 | 156 # newline, newline, it's not speaking our language; if we get |
157 # an HTTP error, we can't be sure the largefile is present; | |
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158 # either way, consider it missing. |
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159 yield 2 |
15168 | 160 |
161 repo.__class__ = lfileswirerepository | |
162 | |
163 # advertise the largefiles=serve capability | |
164 def capabilities(repo, proto): | |
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165 '''Wrap server command to announce largefile server capability''' |
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166 return capabilitiesorig(repo, proto) + ' largefiles=serve' |
15168 | 167 |
168 def heads(repo, proto): | |
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169 '''Wrap server command - largefile capable clients will know to call |
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170 lheads instead''' |
15168 | 171 if lfutil.islfilesrepo(repo): |
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172 return wireproto.ooberror(LARGEFILES_REQUIRED_MSG) |
15168 | 173 return wireproto.heads(repo, proto) |
174 | |
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175 def sshrepocallstream(self, cmd, **args): |
15168 | 176 if cmd == 'heads' and self.capable('largefiles'): |
177 cmd = 'lheads' | |
178 if cmd == 'batch' and self.capable('largefiles'): | |
179 args['cmds'] = args['cmds'].replace('heads ', 'lheads ') | |
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180 return ssholdcallstream(self, cmd, **args) |
15168 | 181 |
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182 headsre = re.compile(r'(^|;)heads\b') |
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183 |
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184 def httprepocallstream(self, cmd, **args): |
15168 | 185 if cmd == 'heads' and self.capable('largefiles'): |
186 cmd = 'lheads' | |
187 if cmd == 'batch' and self.capable('largefiles'): | |
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188 args['cmds'] = headsre.sub('lheads', args['cmds']) |
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189 return httpoldcallstream(self, cmd, **args) |