Mercurial > public > mercurial-scm > hg-stable

annotate mercurial/hgweb/common.py @ 52398:c9baa3541b20

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hgweb: stop using the `pycompat.open()` shim
author Matt Harbison <matt_harbison@yahoo.com>
date Wed, 04 Dec 2024 20:54:35 -0500
parents f4733654f144
children 08612516d436
Ignore whitespace changes - Everywhere: Within whitespace: At end of lines:
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1 # hgweb/common.py - Utility functions needed by hgweb_mod and hgwebdir_mod
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2 #
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3 # Copyright 21 May 2005 - (c) 2005 Jake Edge <jake@edge2.net>
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4 # Copyright 2005, 2006 Olivia Mackall <olivia@selenic.com>
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5 #
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6 # This software may be used and distributed according to the terms of the
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7 # GNU General Public License version 2 or any later version.
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8
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9 from __future__ import annotations
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10
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11 import base64
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12 import errno
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13 import mimetypes
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14 import os
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15 import stat
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16
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17 from ..i18n import _
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18 from .. import (
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19 encoding,
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20 pycompat,
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21 scmutil,
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22 templater,
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23 util,
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24 )
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26 httpserver = util.httpserver
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27
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28 HTTP_OK = 200
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29 HTTP_CREATED = 201
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30 HTTP_NOT_MODIFIED = 304
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31 HTTP_BAD_REQUEST = 400
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32 HTTP_UNAUTHORIZED = 401
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33 HTTP_FORBIDDEN = 403
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34 HTTP_NOT_FOUND = 404
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35 HTTP_METHOD_NOT_ALLOWED = 405
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36 HTTP_NOT_ACCEPTABLE = 406
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37 HTTP_UNSUPPORTED_MEDIA_TYPE = 415
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38 HTTP_SERVER_ERROR = 500
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40 ismember = scmutil.ismember
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43 def hashiddenaccess(repo, req):
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44 if bool(req.qsparams.get(b'access-hidden')):
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45 # Disable this by default for now. Main risk is to get critical
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46 # information exposed through this. This is expecially risky if
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47 # someone decided to make a changeset secret for good reason, but
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48 # its predecessors are still draft.
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49 #
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50 # The feature is currently experimental, so we can still decide to
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51 # change the default.
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52 ui = repo.ui
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53 allow = ui.configlist(b'experimental', b'server.allow-hidden-access')
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54 user = req.remoteuser
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55 if allow and ismember(ui, user, allow):
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56 return True
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57 else:
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58 msg = (
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59 _(
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60 b'ignoring request to access hidden changeset by '
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61 b'unauthorized user: %r\n'
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62 )
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63 % user
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64 )
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65 ui.warn(msg)
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66 return False
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67
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68
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69 def checkauthz(hgweb, req, op):
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70 """Check permission for operation based on request data (including
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71 authentication info). Return if op allowed, else raise an ErrorResponse
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72 exception."""
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73
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74 user = req.remoteuser
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75
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76 deny_read = hgweb.configlist(b'web', b'deny_read')
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77 if deny_read and (not user or ismember(hgweb.repo.ui, user, deny_read)):
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78 raise ErrorResponse(HTTP_UNAUTHORIZED, b'read not authorized')
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79
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80 allow_read = hgweb.configlist(b'web', b'allow_read')
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81 if allow_read and (not ismember(hgweb.repo.ui, user, allow_read)):
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82 raise ErrorResponse(HTTP_UNAUTHORIZED, b'read not authorized')
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83
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84 if op == b'pull' and not hgweb.allowpull:
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85 raise ErrorResponse(HTTP_UNAUTHORIZED, b'pull not authorized')
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86 elif op == b'pull' or op is None: # op is None for interface requests
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87 return
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88
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89 # Allow LFS uploading via PUT requests
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90 if op == b'upload':
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91 if req.method != b'PUT':
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92 msg = b'upload requires PUT request'
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93 raise ErrorResponse(HTTP_METHOD_NOT_ALLOWED, msg)
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94 # enforce that you can only push using POST requests
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95 elif req.method != b'POST':
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96 msg = b'push requires POST request'
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97 raise ErrorResponse(HTTP_METHOD_NOT_ALLOWED, msg)
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98
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99 # require ssl by default for pushing, auth info cannot be sniffed
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100 # and replayed
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101 if hgweb.configbool(b'web', b'push_ssl') and req.urlscheme != b'https':
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102 raise ErrorResponse(HTTP_FORBIDDEN, b'ssl required')
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103
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104 deny = hgweb.configlist(b'web', b'deny_push')
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105 if deny and (not user or ismember(hgweb.repo.ui, user, deny)):
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106 raise ErrorResponse(HTTP_UNAUTHORIZED, b'push not authorized')
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107
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108 allow = hgweb.configlist(b'web', b'allow-push')
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109 if not (allow and ismember(hgweb.repo.ui, user, allow)):
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110 raise ErrorResponse(HTTP_UNAUTHORIZED, b'push not authorized')
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111
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112
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113 # Hooks for hgweb permission checks; extensions can add hooks here.
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114 # Each hook is invoked like this: hook(hgweb, request, operation),
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115 # where operation is either read, pull, push or upload. Hooks should either
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116 # raise an ErrorResponse exception, or just return.
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117 #
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118 # It is possible to do both authentication and authorization through
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119 # this.
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120 permhooks = [checkauthz]
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122
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123 class ErrorResponse(Exception):
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Gregory Szorc <gregory.szorc@gmail.com>
parents: 30766
diff changeset
124 def __init__(self, code, message=None, headers=None):
13444
75f5f312df5f hgweb: give ErrorResponse a descriptive string/Exception representation
Mads Kiilerich <mads@kiilerich.com>
parents: 13400
diff changeset
125 if message is None:
75f5f312df5f hgweb: give ErrorResponse a descriptive string/Exception representation
Mads Kiilerich <mads@kiilerich.com>
parents: 13400
diff changeset
126 message = _statusmessage(code)
36459
f8ea6988a5fb hgweb: pass exception message to builtin Exception ctor as sysstr
Augie Fackler <augie@google.com>
parents: 36427
diff changeset
127 Exception.__init__(self, pycompat.sysstr(message))
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parents: 4462
diff changeset
128 self.code = code
31444
2daeab02b4b1 hgweb: explicitly tests for None
Pierre-Yves David <pierre-yves.david@ens-lyon.org>
parents: 31399
diff changeset
129 if headers is None:
2daeab02b4b1 hgweb: explicitly tests for None
Pierre-Yves David <pierre-yves.david@ens-lyon.org>
parents: 31399
diff changeset
130 headers = []
2daeab02b4b1 hgweb: explicitly tests for None
Pierre-Yves David <pierre-yves.david@ens-lyon.org>
parents: 31399
diff changeset
131 self.headers = headers
42926
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Connor Sheehan <sheehan@mozilla.com>
parents: 40211
diff changeset
132 self.message = message
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parents: 5561
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133
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134
49037
642e31cb55f0 py3: use class X: instead of class X(object):
Gregory Szorc <gregory.szorc@gmail.com>
parents: 48966
diff changeset
135 class continuereader:
36859
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Gregory Szorc <gregory.szorc@gmail.com>
parents: 36789
diff changeset
136 """File object wrapper to handle HTTP 100-continue.
7066617187c1 hgweb: document continuereader
Gregory Szorc <gregory.szorc@gmail.com>
parents: 36789
diff changeset
137
7066617187c1 hgweb: document continuereader
Gregory Szorc <gregory.szorc@gmail.com>
parents: 36789
diff changeset
138 This is used by servers so they automatically handle Expect: 100-continue
7066617187c1 hgweb: document continuereader
Gregory Szorc <gregory.szorc@gmail.com>
parents: 36789
diff changeset
139 request headers. On first read of the request body, the 100 Continue
7066617187c1 hgweb: document continuereader
Gregory Szorc <gregory.szorc@gmail.com>
parents: 36789
diff changeset
140 response is sent. This should trigger the client into actually sending
7066617187c1 hgweb: document continuereader
Gregory Szorc <gregory.szorc@gmail.com>
parents: 36789
diff changeset
141 the request body.
7066617187c1 hgweb: document continuereader
Gregory Szorc <gregory.szorc@gmail.com>
parents: 36789
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142 """
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parents: 42926
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143
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Augie Fackler <durin42@gmail.com>
parents: 13444
diff changeset
144 def __init__(self, f, write):
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Augie Fackler <durin42@gmail.com>
parents: 13444
diff changeset
145 self.f = f
617a87cb7eb2 hgweb: add support for 100-continue as recommended by PEP 333.
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parents: 13444
diff changeset
146 self._write = write
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parents: 13444
diff changeset
147 self.continued = False
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parents: 13444
diff changeset
148
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Augie Fackler <durin42@gmail.com>
parents: 13444
diff changeset
149 def read(self, amt=-1):
617a87cb7eb2 hgweb: add support for 100-continue as recommended by PEP 333.
Augie Fackler <durin42@gmail.com>
parents: 13444
diff changeset
150 if not self.continued:
617a87cb7eb2 hgweb: add support for 100-continue as recommended by PEP 333.
Augie Fackler <durin42@gmail.com>
parents: 13444
diff changeset
151 self.continued = True
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Augie Fackler <augie@google.com>
parents: 43076
diff changeset
152 self._write(b'HTTP/1.1 100 Continue\r\n\r\n')
13570
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Augie Fackler <durin42@gmail.com>
parents: 13444
diff changeset
153 return self.f.read(amt)
617a87cb7eb2 hgweb: add support for 100-continue as recommended by PEP 333.
Augie Fackler <durin42@gmail.com>
parents: 13444
diff changeset
154
617a87cb7eb2 hgweb: add support for 100-continue as recommended by PEP 333.
Augie Fackler <durin42@gmail.com>
parents: 13444
diff changeset
155 def __getattr__(self, attr):
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parents: 43076
diff changeset
156 if attr in (b'close', b'readline', b'readlines', b'__iter__'):
13570
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Augie Fackler <durin42@gmail.com>
parents: 13444
diff changeset
157 return getattr(self.f, attr)
16687
e34106fa0dc3 cleanup: "raise SomeException()" -> "raise SomeException"
Brodie Rao <brodie@sf.io>
parents: 14058
diff changeset
158 raise AttributeError
5563
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parents: 5561
diff changeset
159
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parents: 42926
diff changeset
160
5563
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Bryan O'Sullivan <bos@serpentine.com>
parents: 5561
diff changeset
161 def _statusmessage(code):
29566
075146e85bb6 py3: conditionalize BaseHTTPServer, SimpleHTTPServer and CGIHTTPServer import
Pulkit Goyal <7895pulkit@gmail.com>
parents: 29491
diff changeset
162 responses = httpserver.basehttprequesthandler.responses
43554
9f70512ae2cf cleanup: remove pointless r-prefixes on single-quoted strings
Augie Fackler <augie@google.com>
parents: 43089
diff changeset
163 return pycompat.bytesurl(responses.get(code, ('Error', 'Unknown error'))[0])
43076
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parents: 42926
diff changeset
164
5760
0145f9afb0e7 Removed tabs and trailing whitespace in python files
Thomas Arendsen Hein <thomas@intevation.de>
parents: 5563
diff changeset
165
9694
8269fe2d48f6 hgweb: send proper error messages to the client
Sune Foldager <cryo@cyanite.org>
parents: 9031
diff changeset
166 def statusmessage(code, message=None):
43077
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Augie Fackler <augie@google.com>
parents: 43076
diff changeset
167 return b'%d %s' % (code, message or _statusmessage(code))
131
c9d51742471c moving hgweb to mercurial subdir
jake@edge2.net
parents:
diff changeset
168
43076
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Augie Fackler <augie@google.com>
parents: 42926
diff changeset
169
25717
46e2c57026bc hgweb: drop the default argument for get_stat
Pierre-Yves David <pierre-yves.david@fb.com>
parents: 25660
diff changeset
170 def get_stat(spath, fn):
46e2c57026bc hgweb: drop the default argument for get_stat
Pierre-Yves David <pierre-yves.david@fb.com>
parents: 25660
diff changeset
171 """stat fn if it exists, spath otherwise"""
22577
a111e460318a hgweb: refresh hgweb.repo on phase change (issue4061)
Anton Shestakov <engored@ya.ru>
parents: 19951
diff changeset
172 cl_path = os.path.join(spath, fn)
3853
c0b449154a90 switch to the .hg/store layout, fix the tests
Benoit Boissinot <benoit.boissinot@ens-lyon.org>
parents: 3276
diff changeset
173 if os.path.exists(cl_path):
13958
71f51cc71652 hgweb: detect change based on changelog size too
Martin Geisler <mg@lazybytes.net>
parents: 13444
diff changeset
174 return os.stat(cl_path)
1418
68f81ba07b2a Make hgweb work when the repository is empty (no 00changelog.i)
Benoit Boissinot <benoit.boissinot@ens-lyon.org>
parents: 1416
diff changeset
175 else:
13958
71f51cc71652 hgweb: detect change based on changelog size too
Martin Geisler <mg@lazybytes.net>
parents: 13444
diff changeset
176 return os.stat(spath)
71f51cc71652 hgweb: detect change based on changelog size too
Martin Geisler <mg@lazybytes.net>
parents: 13444
diff changeset
177
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parents: 42926
diff changeset
178
13958
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Martin Geisler <mg@lazybytes.net>
parents: 13444
diff changeset
179 def get_mtime(spath):
43077
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Augie Fackler <augie@google.com>
parents: 43076
diff changeset
180 return get_stat(spath, b"00changelog.i")[stat.ST_MTIME]
1418
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Benoit Boissinot <benoit.boissinot@ens-lyon.org>
parents: 1416
diff changeset
181
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parents: 42926
diff changeset
182
31793
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Gregory Szorc <gregory.szorc@gmail.com>
parents: 31792
diff changeset
183 def ispathsafe(path):
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parents: 31792
diff changeset
184 """Determine if a path is safe to use for filesystem access."""
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parents: 43076
diff changeset
185 parts = path.split(b'/')
31793
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Gregory Szorc <gregory.szorc@gmail.com>
parents: 31792
diff changeset
186 for part in parts:
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Augie Fackler <augie@google.com>
parents: 42926
diff changeset
187 if (
43077
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Augie Fackler <augie@google.com>
parents: 43076
diff changeset
188 part in (b'', pycompat.oscurdir, pycompat.ospardir)
43076
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Augie Fackler <augie@google.com>
parents: 42926
diff changeset
189 or pycompat.ossep in part
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Augie Fackler <augie@google.com>
parents: 42926
diff changeset
190 or pycompat.osaltsep is not None
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parents: 42926
diff changeset
191 and pycompat.osaltsep in part
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Augie Fackler <augie@google.com>
parents: 42926
diff changeset
192 ):
31793
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parents: 31792
diff changeset
193 return False
62f9679df1f2 hgweb: extract path traversal checking into standalone function
Gregory Szorc <gregory.szorc@gmail.com>
parents: 31792
diff changeset
194
62f9679df1f2 hgweb: extract path traversal checking into standalone function
Gregory Szorc <gregory.szorc@gmail.com>
parents: 31792
diff changeset
195 return True
62f9679df1f2 hgweb: extract path traversal checking into standalone function
Gregory Szorc <gregory.szorc@gmail.com>
parents: 31792
diff changeset
196
43076
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parents: 42926
diff changeset
197
45398
dc9fe90bdbd5 hgweb: let staticfile() look up path from default location unless provided
Martin von Zweigbergk <martinvonz@google.com>
parents: 45327
diff changeset
198 def staticfile(templatepath, directory, fname, res):
5930
c301f15c965a send conservatively capitalized HTTP headers
Dirkjan Ochtman <dirkjan@ochtman.nl>
parents: 5779
diff changeset
199 """return a file inside directory with guessed Content-Type header
1825
a9343f9d7365 Make hgweb.staticfile() more secure and portable.
Thomas Arendsen Hein <thomas@intevation.de>
parents: 1796
diff changeset
200
a9343f9d7365 Make hgweb.staticfile() more secure and portable.
Thomas Arendsen Hein <thomas@intevation.de>
parents: 1796
diff changeset
201 fname always uses '/' as directory separator and isn't allowed to
a9343f9d7365 Make hgweb.staticfile() more secure and portable.
Thomas Arendsen Hein <thomas@intevation.de>
parents: 1796
diff changeset
202 contain unusual path components.
5930
c301f15c965a send conservatively capitalized HTTP headers
Dirkjan Ochtman <dirkjan@ochtman.nl>
parents: 5779
diff changeset
203 Content-Type is guessed using the mimetypes module.
1825
a9343f9d7365 Make hgweb.staticfile() more secure and portable.
Thomas Arendsen Hein <thomas@intevation.de>
parents: 1796
diff changeset
204 Return an empty string if fname is illegal or file not found.
1793
83c6d8355909 Allow serving static files from hgwebdir to fix CSS and favicon.
Thomas Arendsen Hein <thomas@intevation.de>
parents: 1792
diff changeset
205
1825
a9343f9d7365 Make hgweb.staticfile() more secure and portable.
Thomas Arendsen Hein <thomas@intevation.de>
parents: 1796
diff changeset
206 """
31793
62f9679df1f2 hgweb: extract path traversal checking into standalone function
Gregory Szorc <gregory.szorc@gmail.com>
parents: 31792
diff changeset
207 if not ispathsafe(fname):
62f9679df1f2 hgweb: extract path traversal checking into standalone function
Gregory Szorc <gregory.szorc@gmail.com>
parents: 31792
diff changeset
208 return
62f9679df1f2 hgweb: extract path traversal checking into standalone function
Gregory Szorc <gregory.szorc@gmail.com>
parents: 31792
diff changeset
209
45398
dc9fe90bdbd5 hgweb: let staticfile() look up path from default location unless provided
Martin von Zweigbergk <martinvonz@google.com>
parents: 45327
diff changeset
210 if not directory:
dc9fe90bdbd5 hgweb: let staticfile() look up path from default location unless provided
Martin von Zweigbergk <martinvonz@google.com>
parents: 45327
diff changeset
211 tp = templatepath or templater.templatedir()
dc9fe90bdbd5 hgweb: let staticfile() look up path from default location unless provided
Martin von Zweigbergk <martinvonz@google.com>
parents: 45327
diff changeset
212 if tp is not None:
dc9fe90bdbd5 hgweb: let staticfile() look up path from default location unless provided
Martin von Zweigbergk <martinvonz@google.com>
parents: 45327
diff changeset
213 directory = os.path.join(tp, b'static')
dc9fe90bdbd5 hgweb: let staticfile() look up path from default location unless provided
Martin von Zweigbergk <martinvonz@google.com>
parents: 45327
diff changeset
214
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Augie Fackler <augie@google.com>
parents: 43076
diff changeset
215 fpath = os.path.join(*fname.split(b'/'))
45400
f0735f2ce542 hgweb: minimize scope of a try-block in staticfile()
Martin von Zweigbergk <martinvonz@google.com>
parents: 45399
diff changeset
216 ct = pycompat.sysbytes(
f0735f2ce542 hgweb: minimize scope of a try-block in staticfile()
Martin von Zweigbergk <martinvonz@google.com>
parents: 45399
diff changeset
217 mimetypes.guess_type(pycompat.fsdecode(fpath))[0] or r"text/plain"
f0735f2ce542 hgweb: minimize scope of a try-block in staticfile()
Martin von Zweigbergk <martinvonz@google.com>
parents: 45399
diff changeset
218 )
45327
9a5c4875a88c hgweb: simplify staticfile() now that we always pass it a single directory
Martin von Zweigbergk <martinvonz@google.com>
parents: 43811
diff changeset
219 path = os.path.join(directory, fpath)
1793
83c6d8355909 Allow serving static files from hgwebdir to fix CSS and favicon.
Thomas Arendsen Hein <thomas@intevation.de>
parents: 1792
diff changeset
220 try:
1825
a9343f9d7365 Make hgweb.staticfile() more secure and portable.
Thomas Arendsen Hein <thomas@intevation.de>
parents: 1796
diff changeset
221 os.stat(path)
52398
c9baa3541b20 hgweb: stop using the `pycompat.open()` shim
Matt Harbison <matt_harbison@yahoo.com>
parents: 51901
diff changeset
222 with open(path, 'rb') as fh:
31792
161a87ed456e hgweb: use context manager for file I/O
Gregory Szorc <gregory.szorc@gmail.com>
parents: 31444
diff changeset
223 data = fh.read()
5561
22713dce19f6 hgweb: return meaningful HTTP status codes instead of nonsense
Bryan O'Sullivan <bos@serpentine.com>
parents: 4462
diff changeset
224 except TypeError:
43077
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Augie Fackler <augie@google.com>
parents: 43076
diff changeset
225 raise ErrorResponse(HTTP_SERVER_ERROR, b'illegal filename')
25660
328739ea70c3 global: mass rewrite to use modern exception syntax
Gregory Szorc <gregory.szorc@gmail.com>
parents: 22577
diff changeset
226 except OSError as err:
5561
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Bryan O'Sullivan <bos@serpentine.com>
parents: 4462
diff changeset
227 if err.errno == errno.ENOENT:
5993
948a41e77902 hgweb: explicit response status
Dirkjan Ochtman <dirkjan@ochtman.nl>
parents: 5930
diff changeset
228 raise ErrorResponse(HTTP_NOT_FOUND)
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Bryan O'Sullivan <bos@serpentine.com>
parents: 4462
diff changeset
229 else:
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parents: 42926
diff changeset
230 raise ErrorResponse(
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Augie Fackler <augie@google.com>
parents: 42926
diff changeset
231 HTTP_SERVER_ERROR, encoding.strtolocal(err.strerror)
2372284d9457 formatting: blacken the codebase
Augie Fackler <augie@google.com>
parents: 42926
diff changeset
232 )
2372284d9457 formatting: blacken the codebase
Augie Fackler <augie@google.com>
parents: 42926
diff changeset
233
45400
f0735f2ce542 hgweb: minimize scope of a try-block in staticfile()
Martin von Zweigbergk <martinvonz@google.com>
parents: 45399
diff changeset
234 res.headers[b'Content-Type'] = ct
f0735f2ce542 hgweb: minimize scope of a try-block in staticfile()
Martin von Zweigbergk <martinvonz@google.com>
parents: 45399
diff changeset
235 res.setbodybytes(data)
f0735f2ce542 hgweb: minimize scope of a try-block in staticfile()
Martin von Zweigbergk <martinvonz@google.com>
parents: 45399
diff changeset
236 return res
f0735f2ce542 hgweb: minimize scope of a try-block in staticfile()
Martin von Zweigbergk <martinvonz@google.com>
parents: 45399
diff changeset
237
3276
db9d2a624521 hgweb: Search templates in templatepath/style/map, too, using a common function.
Thomas Arendsen Hein <thomas@intevation.de>
parents: 3244
diff changeset
238
4462
12e4d9524951 hgweb: use generator to count parity of horizontal stripes for easier reading.
Thomas Arendsen Hein <thomas@intevation.de>
parents: 4038
diff changeset
239 def paritygen(stripecount, offset=0):
12e4d9524951 hgweb: use generator to count parity of horizontal stripes for easier reading.
Thomas Arendsen Hein <thomas@intevation.de>
parents: 4038
diff changeset
240 """count parity of horizontal stripes for easier reading"""
12e4d9524951 hgweb: use generator to count parity of horizontal stripes for easier reading.
Thomas Arendsen Hein <thomas@intevation.de>
parents: 4038
diff changeset
241 if stripecount and offset:
12e4d9524951 hgweb: use generator to count parity of horizontal stripes for easier reading.
Thomas Arendsen Hein <thomas@intevation.de>
parents: 4038
diff changeset
242 # account for offset, e.g. due to building the list in reverse
12e4d9524951 hgweb: use generator to count parity of horizontal stripes for easier reading.
Thomas Arendsen Hein <thomas@intevation.de>
parents: 4038
diff changeset
243 count = (stripecount + offset) % stripecount
36427
7a3590e67868 py3: use '//' for integer division in hgweb/common.py
Pulkit Goyal <7895pulkit@gmail.com>
parents: 36329
diff changeset
244 parity = (stripecount + offset) // stripecount & 1
4462
12e4d9524951 hgweb: use generator to count parity of horizontal stripes for easier reading.
Thomas Arendsen Hein <thomas@intevation.de>
parents: 4038
diff changeset
245 else:
12e4d9524951 hgweb: use generator to count parity of horizontal stripes for easier reading.
Thomas Arendsen Hein <thomas@intevation.de>
parents: 4038
diff changeset
246 count = 0
12e4d9524951 hgweb: use generator to count parity of horizontal stripes for easier reading.
Thomas Arendsen Hein <thomas@intevation.de>
parents: 4038
diff changeset
247 parity = 0
12e4d9524951 hgweb: use generator to count parity of horizontal stripes for easier reading.
Thomas Arendsen Hein <thomas@intevation.de>
parents: 4038
diff changeset
248 while True:
12e4d9524951 hgweb: use generator to count parity of horizontal stripes for easier reading.
Thomas Arendsen Hein <thomas@intevation.de>
parents: 4038
diff changeset
249 yield parity
12e4d9524951 hgweb: use generator to count parity of horizontal stripes for easier reading.
Thomas Arendsen Hein <thomas@intevation.de>
parents: 4038
diff changeset
250 count += 1
12e4d9524951 hgweb: use generator to count parity of horizontal stripes for easier reading.
Thomas Arendsen Hein <thomas@intevation.de>
parents: 4038
diff changeset
251 if stripecount and count >= stripecount:
12e4d9524951 hgweb: use generator to count parity of horizontal stripes for easier reading.
Thomas Arendsen Hein <thomas@intevation.de>
parents: 4038
diff changeset
252 parity = 1 - parity
12e4d9524951 hgweb: use generator to count parity of horizontal stripes for easier reading.
Thomas Arendsen Hein <thomas@intevation.de>
parents: 4038
diff changeset
253 count = 0
12e4d9524951 hgweb: use generator to count parity of horizontal stripes for easier reading.
Thomas Arendsen Hein <thomas@intevation.de>
parents: 4038
diff changeset
254
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255
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256 def get_contact(config):
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257 """Return repo contact information or empty string.
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258
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259 web.contact is the primary source, but if that is not set, try
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260 ui.username or $EMAIL as a fallback to display something useful.
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261 """
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262 return (
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263 config(b"web", b"contact")
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264 or config(b"ui", b"username")
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265 or encoding.environ.get(b"EMAIL")
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266 or b""
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267 )
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268
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269
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270 def cspvalues(ui):
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271 """Obtain the Content-Security-Policy header and nonce value.
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272
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273 Returns a 2-tuple of the CSP header value and the nonce value.
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274
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275 First value is ``None`` if CSP isn't enabled. Second value is ``None``
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276 if CSP isn't enabled or if the CSP header doesn't need a nonce.
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277 """
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278 # Without demandimport, "import uuid" could have an immediate side-effect
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279 # running "ldconfig" on Linux trying to find libuuid.
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280 # With Python <= 2.7.12, that "ldconfig" is run via a shell and the shell
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281 # may pollute the terminal with:
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282 #
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283 # shell-init: error retrieving current directory: getcwd: cannot access
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284 # parent directories: No such file or directory
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285 #
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286 # Python >= 2.7.13 has fixed it by running "ldconfig" directly without a
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287 # shell (hg changeset a09ae70f3489).
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288 #
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289 # Moved "import uuid" from here so it's executed after we know we have
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290 # a sane cwd (i.e. after dispatch.py cwd check).
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291 #
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292 # We can move it back once we no longer need Python <= 2.7.12 support.
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293 import uuid
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294
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295 # Don't allow untrusted CSP setting since it be disable protections
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296 # from a trusted/global source.
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297 csp = ui.config(b'web', b'csp', untrusted=False)
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298 nonce = None
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299
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300 if csp and b'%nonce%' in csp:
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301 nonce = base64.urlsafe_b64encode(uuid.uuid4().bytes).rstrip(b'=')
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302 csp = csp.replace(b'%nonce%', nonce)
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303
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304 return csp, nonce