Mercurial > hg
annotate mercurial/hgweb/common.py @ 21631:9bafe09285f2
merge with stable
author | Matt Mackall <mpm@selenic.com> |
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date | Thu, 29 May 2014 15:41:16 -0700 |
parents | d51c4d85ec23 |
children | a111e460318a |
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1 # hgweb/common.py - Utility functions needed by hgweb_mod and hgwebdir_mod |
131 | 2 # |
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3 # Copyright 21 May 2005 - (c) 2005 Jake Edge <jake@edge2.net> |
2859 | 4 # Copyright 2005, 2006 Matt Mackall <mpm@selenic.com> |
131 | 5 # |
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6 # This software may be used and distributed according to the terms of the |
10263 | 7 # GNU General Public License version 2 or any later version. |
131 | 8 |
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9 import errno, mimetypes, os |
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10 |
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11 HTTP_OK = 200 |
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12 HTTP_NOT_MODIFIED = 304 |
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13 HTTP_BAD_REQUEST = 400 |
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14 HTTP_UNAUTHORIZED = 401 |
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15 HTTP_FORBIDDEN = 403 |
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16 HTTP_NOT_FOUND = 404 |
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17 HTTP_METHOD_NOT_ALLOWED = 405 |
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18 HTTP_SERVER_ERROR = 500 |
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19 |
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20 |
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21 def ismember(ui, username, userlist): |
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22 """Check if username is a member of userlist. |
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23 |
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24 If userlist has a single '*' member, all users are considered members. |
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25 Can be overridden by extensions to provide more complex authorization |
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26 schemes. |
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27 """ |
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28 return userlist == ['*'] or username in userlist |
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29 |
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30 def checkauthz(hgweb, req, op): |
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31 '''Check permission for operation based on request data (including |
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32 authentication info). Return if op allowed, else raise an ErrorResponse |
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33 exception.''' |
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34 |
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35 user = req.env.get('REMOTE_USER') |
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36 |
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37 deny_read = hgweb.configlist('web', 'deny_read') |
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38 if deny_read and (not user or ismember(hgweb.repo.ui, user, deny_read)): |
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39 raise ErrorResponse(HTTP_UNAUTHORIZED, 'read not authorized') |
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40 |
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41 allow_read = hgweb.configlist('web', 'allow_read') |
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42 if allow_read and (not ismember(hgweb.repo.ui, user, allow_read)): |
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43 raise ErrorResponse(HTTP_UNAUTHORIZED, 'read not authorized') |
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44 |
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45 if op == 'pull' and not hgweb.allowpull: |
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46 raise ErrorResponse(HTTP_UNAUTHORIZED, 'pull not authorized') |
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47 elif op == 'pull' or op is None: # op is None for interface requests |
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48 return |
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49 |
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50 # enforce that you can only push using POST requests |
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51 if req.env['REQUEST_METHOD'] != 'POST': |
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52 msg = 'push requires POST request' |
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53 raise ErrorResponse(HTTP_METHOD_NOT_ALLOWED, msg) |
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54 |
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55 # require ssl by default for pushing, auth info cannot be sniffed |
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56 # and replayed |
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57 scheme = req.env.get('wsgi.url_scheme') |
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58 if hgweb.configbool('web', 'push_ssl', True) and scheme != 'https': |
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59 raise ErrorResponse(HTTP_FORBIDDEN, 'ssl required') |
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60 |
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61 deny = hgweb.configlist('web', 'deny_push') |
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62 if deny and (not user or ismember(hgweb.repo.ui, user, deny)): |
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63 raise ErrorResponse(HTTP_UNAUTHORIZED, 'push not authorized') |
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64 |
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65 allow = hgweb.configlist('web', 'allow_push') |
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66 if not (allow and ismember(hgweb.repo.ui, user, allow)): |
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67 raise ErrorResponse(HTTP_UNAUTHORIZED, 'push not authorized') |
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68 |
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69 # Hooks for hgweb permission checks; extensions can add hooks here. |
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70 # Each hook is invoked like this: hook(hgweb, request, operation), |
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71 # where operation is either read, pull or push. Hooks should either |
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72 # raise an ErrorResponse exception, or just return. |
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73 # |
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74 # It is possible to do both authentication and authorization through |
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75 # this. |
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76 permhooks = [checkauthz] |
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77 |
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78 |
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79 class ErrorResponse(Exception): |
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80 def __init__(self, code, message=None, headers=[]): |
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81 if message is None: |
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82 message = _statusmessage(code) |
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83 Exception.__init__(self) |
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84 self.code = code |
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85 self.message = message |
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86 self.headers = headers |
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87 def __str__(self): |
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88 return self.message |
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89 |
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90 class continuereader(object): |
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91 def __init__(self, f, write): |
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92 self.f = f |
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93 self._write = write |
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94 self.continued = False |
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95 |
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96 def read(self, amt=-1): |
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97 if not self.continued: |
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98 self.continued = True |
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99 self._write('HTTP/1.1 100 Continue\r\n\r\n') |
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100 return self.f.read(amt) |
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101 |
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102 def __getattr__(self, attr): |
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103 if attr in ('close', 'readline', 'readlines', '__iter__'): |
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104 return getattr(self.f, attr) |
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105 raise AttributeError |
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106 |
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107 def _statusmessage(code): |
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108 from BaseHTTPServer import BaseHTTPRequestHandler |
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109 responses = BaseHTTPRequestHandler.responses |
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110 return responses.get(code, ('Error', 'Unknown error'))[0] |
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111 |
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112 def statusmessage(code, message=None): |
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113 return '%d %s' % (code, message or _statusmessage(code)) |
131 | 114 |
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115 def get_stat(spath): |
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116 """stat changelog if it exists, spath otherwise""" |
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117 cl_path = os.path.join(spath, "00changelog.i") |
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118 if os.path.exists(cl_path): |
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119 return os.stat(cl_path) |
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120 else: |
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121 return os.stat(spath) |
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122 |
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123 def get_mtime(spath): |
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124 return get_stat(spath).st_mtime |
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125 |
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126 def staticfile(directory, fname, req): |
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127 """return a file inside directory with guessed Content-Type header |
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128 |
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129 fname always uses '/' as directory separator and isn't allowed to |
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130 contain unusual path components. |
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131 Content-Type is guessed using the mimetypes module. |
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132 Return an empty string if fname is illegal or file not found. |
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133 |
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134 """ |
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135 parts = fname.split('/') |
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136 for part in parts: |
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137 if (part in ('', os.curdir, os.pardir) or |
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138 os.sep in part or os.altsep is not None and os.altsep in part): |
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139 return |
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140 fpath = os.path.join(*parts) |
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141 if isinstance(directory, str): |
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142 directory = [directory] |
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143 for d in directory: |
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144 path = os.path.join(d, fpath) |
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145 if os.path.exists(path): |
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146 break |
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147 try: |
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148 os.stat(path) |
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149 ct = mimetypes.guess_type(path)[0] or "text/plain" |
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150 fp = open(path, 'rb') |
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151 data = fp.read() |
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152 fp.close() |
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153 req.respond(HTTP_OK, ct, body=data) |
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154 except TypeError: |
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155 raise ErrorResponse(HTTP_SERVER_ERROR, 'illegal filename') |
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156 except OSError, err: |
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157 if err.errno == errno.ENOENT: |
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158 raise ErrorResponse(HTTP_NOT_FOUND) |
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159 else: |
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160 raise ErrorResponse(HTTP_SERVER_ERROR, err.strerror) |
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161 |
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162 def paritygen(stripecount, offset=0): |
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163 """count parity of horizontal stripes for easier reading""" |
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164 if stripecount and offset: |
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165 # account for offset, e.g. due to building the list in reverse |
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166 count = (stripecount + offset) % stripecount |
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167 parity = (stripecount + offset) / stripecount & 1 |
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168 else: |
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169 count = 0 |
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170 parity = 0 |
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171 while True: |
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172 yield parity |
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173 count += 1 |
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174 if stripecount and count >= stripecount: |
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175 parity = 1 - parity |
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176 count = 0 |
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177 |
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178 def get_contact(config): |
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179 """Return repo contact information or empty string. |
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180 |
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181 web.contact is the primary source, but if that is not set, try |
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182 ui.username or $EMAIL as a fallback to display something useful. |
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183 """ |
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184 return (config("web", "contact") or |
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185 config("ui", "username") or |
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186 os.environ.get("EMAIL") or "") |
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187 |
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188 def caching(web, req): |
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189 tag = str(web.mtime) |
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190 if req.env.get('HTTP_IF_NONE_MATCH') == tag: |
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191 raise ErrorResponse(HTTP_NOT_MODIFIED) |
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192 req.headers.append(('ETag', tag)) |