Mercurial > public > mercurial-scm > hg-stable
annotate mercurial/hgweb/protocol.py @ 6779:d3147b4e3e8a
hgweb: centralize permission checks for protocol commands
Consistently enforces authorization checks set up in hgrc up front, so that
the actual commands don't have to worry about them and implementers of
hgweb alternatives can easily implement their own permission checks.
| author | Dirkjan Ochtman <dirkjan@ochtman.nl> |
|---|---|
| date | Sun, 29 Jun 2008 11:35:06 +0200 |
| parents | 8542fac26f63 |
| children | 4c1d67e0fa8c |
| rev | line source |
|---|---|
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1 # |
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2 # Copyright 21 May 2005 - (c) 2005 Jake Edge <jake@edge2.net> |
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3 # Copyright 2005-2007 Matt Mackall <mpm@selenic.com> |
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4 # |
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5 # This software may be used and distributed according to the terms |
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6 # of the GNU General Public License, incorporated herein by reference. |
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7 |
| 6212 | 8 import cStringIO, zlib, tempfile, errno, os, sys |
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9 from mercurial import util, streamclone |
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10 from mercurial.node import bin, hex |
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11 from mercurial import changegroup as changegroupmod |
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12 from common import HTTP_OK, HTTP_NOT_FOUND, HTTP_SERVER_ERROR |
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13 |
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14 # __all__ is populated with the allowed commands. Be sure to add to it if |
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15 # you're adding a new command, or the new command won't work. |
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16 |
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17 __all__ = [ |
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18 'lookup', 'heads', 'branches', 'between', 'changegroup', |
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19 'changegroupsubset', 'capabilities', 'unbundle', 'stream_out', |
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20 ] |
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21 |
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22 HGTYPE = 'application/mercurial-0.1' |
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23 |
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24 def lookup(web, req): |
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25 try: |
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26 r = hex(web.repo.lookup(req.form['key'][0])) |
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27 success = 1 |
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28 except Exception,inst: |
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29 r = str(inst) |
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30 success = 0 |
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31 resp = "%s %s\n" % (success, r) |
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32 req.respond(HTTP_OK, HGTYPE, length=len(resp)) |
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33 req.write(resp) |
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34 |
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35 def heads(web, req): |
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36 resp = " ".join(map(hex, web.repo.heads())) + "\n" |
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37 req.respond(HTTP_OK, HGTYPE, length=len(resp)) |
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38 req.write(resp) |
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39 |
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40 def branches(web, req): |
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41 nodes = [] |
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42 if 'nodes' in req.form: |
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43 nodes = map(bin, req.form['nodes'][0].split(" ")) |
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44 resp = cStringIO.StringIO() |
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45 for b in web.repo.branches(nodes): |
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46 resp.write(" ".join(map(hex, b)) + "\n") |
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47 resp = resp.getvalue() |
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48 req.respond(HTTP_OK, HGTYPE, length=len(resp)) |
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49 req.write(resp) |
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50 |
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51 def between(web, req): |
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52 if 'pairs' in req.form: |
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53 pairs = [map(bin, p.split("-")) |
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54 for p in req.form['pairs'][0].split(" ")] |
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55 resp = cStringIO.StringIO() |
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56 for b in web.repo.between(pairs): |
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57 resp.write(" ".join(map(hex, b)) + "\n") |
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58 resp = resp.getvalue() |
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59 req.respond(HTTP_OK, HGTYPE, length=len(resp)) |
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60 req.write(resp) |
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61 |
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62 def changegroup(web, req): |
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63 req.respond(HTTP_OK, HGTYPE) |
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64 nodes = [] |
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65 |
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66 if 'roots' in req.form: |
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67 nodes = map(bin, req.form['roots'][0].split(" ")) |
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68 |
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69 z = zlib.compressobj() |
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70 f = web.repo.changegroup(nodes, 'serve') |
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71 while 1: |
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72 chunk = f.read(4096) |
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73 if not chunk: |
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74 break |
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75 req.write(z.compress(chunk)) |
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76 |
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77 req.write(z.flush()) |
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78 |
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79 def changegroupsubset(web, req): |
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80 req.respond(HTTP_OK, HGTYPE) |
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81 bases = [] |
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82 heads = [] |
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83 |
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84 if 'bases' in req.form: |
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85 bases = [bin(x) for x in req.form['bases'][0].split(' ')] |
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86 if 'heads' in req.form: |
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87 heads = [bin(x) for x in req.form['heads'][0].split(' ')] |
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88 |
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89 z = zlib.compressobj() |
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90 f = web.repo.changegroupsubset(bases, heads, 'serve') |
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91 while 1: |
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92 chunk = f.read(4096) |
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93 if not chunk: |
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94 break |
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95 req.write(z.compress(chunk)) |
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96 |
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97 req.write(z.flush()) |
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98 |
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99 def capabilities(web, req): |
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100 resp = ' '.join(web.capabilities()) |
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101 req.respond(HTTP_OK, HGTYPE, length=len(resp)) |
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102 req.write(resp) |
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103 |
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104 def unbundle(web, req): |
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105 |
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106 def bail(response, headers={}): |
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107 length = int(req.env.get('CONTENT_LENGTH', 0)) |
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108 for s in util.filechunkiter(req, limit=length): |
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109 # drain incoming bundle, else client will not see |
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110 # response when run outside cgi script |
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111 pass |
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112 |
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113 status = headers.pop('status', HTTP_OK) |
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114 req.header(headers.items()) |
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115 req.respond(status, HGTYPE) |
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116 req.write('0\n') |
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117 req.write(response) |
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118 |
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119 proto = req.env.get('wsgi.url_scheme') or 'http' |
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120 their_heads = req.form['heads'][0].split(' ') |
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121 |
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122 def check_heads(): |
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123 heads = map(hex, web.repo.heads()) |
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124 return their_heads == [hex('force')] or their_heads == heads |
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125 |
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126 # fail early if possible |
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127 if not check_heads(): |
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128 bail('unsynced changes\n') |
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129 return |
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130 |
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131 req.respond(HTTP_OK, HGTYPE) |
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132 |
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133 # do not lock repo until all changegroup data is |
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134 # streamed. save to temporary file. |
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135 |
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136 fd, tempname = tempfile.mkstemp(prefix='hg-unbundle-') |
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137 fp = os.fdopen(fd, 'wb+') |
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138 try: |
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139 length = int(req.env['CONTENT_LENGTH']) |
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140 for s in util.filechunkiter(req, limit=length): |
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141 fp.write(s) |
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142 |
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143 try: |
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144 lock = web.repo.lock() |
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145 try: |
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146 if not check_heads(): |
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147 req.write('0\n') |
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148 req.write('unsynced changes\n') |
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149 return |
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150 |
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151 fp.seek(0) |
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152 header = fp.read(6) |
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153 if header.startswith('HG') and not header.startswith('HG10'): |
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154 raise ValueError('unknown bundle version') |
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155 elif header not in changegroupmod.bundletypes: |
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156 raise ValueError('unknown bundle compression type') |
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157 gen = changegroupmod.unbundle(header, fp) |
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158 |
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159 # send addchangegroup output to client |
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160 |
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161 oldio = sys.stdout, sys.stderr |
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162 sys.stderr = sys.stdout = cStringIO.StringIO() |
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163 |
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164 try: |
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165 url = 'remote:%s:%s' % (proto, |
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166 req.env.get('REMOTE_HOST', '')) |
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167 try: |
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168 ret = web.repo.addchangegroup(gen, 'serve', url) |
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169 except util.Abort, inst: |
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170 sys.stdout.write("abort: %s\n" % inst) |
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171 ret = 0 |
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172 finally: |
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173 val = sys.stdout.getvalue() |
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174 sys.stdout, sys.stderr = oldio |
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175 req.write('%d\n' % ret) |
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176 req.write(val) |
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177 finally: |
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178 del lock |
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179 except ValueError, inst: |
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180 req.write('0\n') |
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181 req.write(str(inst) + '\n') |
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182 except (OSError, IOError), inst: |
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183 req.write('0\n') |
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184 filename = getattr(inst, 'filename', '') |
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185 # Don't send our filesystem layout to the client |
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186 if filename.startswith(web.repo.root): |
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187 filename = filename[len(web.repo.root)+1:] |
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188 else: |
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189 filename = '' |
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190 error = getattr(inst, 'strerror', 'Unknown error') |
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191 if inst.errno == errno.ENOENT: |
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192 code = HTTP_NOT_FOUND |
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193 else: |
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194 code = HTTP_SERVER_ERROR |
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195 req.respond(code) |
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196 req.write('%s: %s\n' % (error, filename)) |
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197 finally: |
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198 fp.close() |
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199 os.unlink(tempname) |
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200 |
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201 def stream_out(web, req): |
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202 req.respond(HTTP_OK, HGTYPE) |
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203 streamclone.stream_out(web.repo, req, untrusted=True) |