Mercurial > hg
annotate mercurial/hgweb/common.py @ 12776:4f4eddee254d
gendoc: move section commands to module scope
author | Martin Geisler <mg@lazybytes.net> |
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date | Wed, 20 Oct 2010 18:07:50 +0200 |
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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 # Hooks for hgweb permission checks; extensions can add hooks here. Each hook |
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21 # is invoked like this: hook(hgweb, request, operation), where operation is |
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22 # either read, pull or push. Hooks should either raise an ErrorResponse |
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23 # exception, or just return. |
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24 # It is possible to do both authentication and authorization through this. |
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25 permhooks = [] |
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26 |
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27 def checkauthz(hgweb, req, op): |
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28 '''Check permission for operation based on request data (including |
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29 authentication info). Return if op allowed, else raise an ErrorResponse |
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30 exception.''' |
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31 |
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32 user = req.env.get('REMOTE_USER') |
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33 |
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34 deny_read = hgweb.configlist('web', 'deny_read') |
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35 if deny_read and (not user or deny_read == ['*'] or user in deny_read): |
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36 raise ErrorResponse(HTTP_UNAUTHORIZED, 'read not authorized') |
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37 |
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38 allow_read = hgweb.configlist('web', 'allow_read') |
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39 result = (not allow_read) or (allow_read == ['*']) |
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40 if not (result or user in allow_read): |
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41 raise ErrorResponse(HTTP_UNAUTHORIZED, 'read not authorized') |
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42 |
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43 if op == 'pull' and not hgweb.allowpull: |
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44 raise ErrorResponse(HTTP_UNAUTHORIZED, 'pull not authorized') |
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45 elif op == 'pull' or op is None: # op is None for interface requests |
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46 return |
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47 |
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48 # enforce that you can only push using POST requests |
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49 if req.env['REQUEST_METHOD'] != 'POST': |
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50 msg = 'push requires POST request' |
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51 raise ErrorResponse(HTTP_METHOD_NOT_ALLOWED, msg) |
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52 |
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53 # require ssl by default for pushing, auth info cannot be sniffed |
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54 # and replayed |
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55 scheme = req.env.get('wsgi.url_scheme') |
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56 if hgweb.configbool('web', 'push_ssl', True) and scheme != 'https': |
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57 raise ErrorResponse(HTTP_OK, 'ssl required') |
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58 |
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59 deny = hgweb.configlist('web', 'deny_push') |
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60 if deny and (not user or deny == ['*'] or user in deny): |
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61 raise ErrorResponse(HTTP_UNAUTHORIZED, 'push not authorized') |
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62 |
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63 allow = hgweb.configlist('web', 'allow_push') |
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64 result = allow and (allow == ['*'] or user in allow) |
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65 if not result: |
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66 raise ErrorResponse(HTTP_UNAUTHORIZED, 'push not authorized') |
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67 |
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68 # Add the default permhook, which provides simple authorization. |
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69 permhooks.append(checkauthz) |
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70 |
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71 |
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72 class ErrorResponse(Exception): |
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73 def __init__(self, code, message=None, headers=[]): |
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74 Exception.__init__(self) |
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75 self.code = code |
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76 self.headers = headers |
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77 if message is not None: |
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78 self.message = message |
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79 else: |
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80 self.message = _statusmessage(code) |
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81 |
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82 def _statusmessage(code): |
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83 from BaseHTTPServer import BaseHTTPRequestHandler |
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84 responses = BaseHTTPRequestHandler.responses |
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85 return responses.get(code, ('Error', 'Unknown error'))[0] |
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86 |
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87 def statusmessage(code, message=None): |
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88 return '%d %s' % (code, message or _statusmessage(code)) |
131 | 89 |
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90 def get_mtime(spath): |
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91 cl_path = os.path.join(spath, "00changelog.i") |
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92 if os.path.exists(cl_path): |
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93 return os.stat(cl_path).st_mtime |
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94 else: |
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95 return os.stat(spath).st_mtime |
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96 |
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97 def staticfile(directory, fname, req): |
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98 """return a file inside directory with guessed Content-Type header |
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99 |
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100 fname always uses '/' as directory separator and isn't allowed to |
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101 contain unusual path components. |
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102 Content-Type is guessed using the mimetypes module. |
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103 Return an empty string if fname is illegal or file not found. |
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104 |
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105 """ |
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106 parts = fname.split('/') |
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107 for part in parts: |
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108 if (part in ('', os.curdir, os.pardir) or |
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109 os.sep in part or os.altsep is not None and os.altsep in part): |
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110 return "" |
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111 fpath = os.path.join(*parts) |
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112 if isinstance(directory, str): |
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113 directory = [directory] |
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114 for d in directory: |
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115 path = os.path.join(d, fpath) |
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116 if os.path.exists(path): |
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117 break |
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118 try: |
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119 os.stat(path) |
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120 ct = mimetypes.guess_type(path)[0] or "text/plain" |
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121 req.respond(HTTP_OK, ct, length = os.path.getsize(path)) |
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122 return open(path, 'rb').read() |
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123 except TypeError: |
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124 raise ErrorResponse(HTTP_SERVER_ERROR, 'illegal filename') |
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125 except OSError, err: |
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126 if err.errno == errno.ENOENT: |
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127 raise ErrorResponse(HTTP_NOT_FOUND) |
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128 else: |
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129 raise ErrorResponse(HTTP_SERVER_ERROR, err.strerror) |
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130 |
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131 def paritygen(stripecount, offset=0): |
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132 """count parity of horizontal stripes for easier reading""" |
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133 if stripecount and offset: |
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134 # account for offset, e.g. due to building the list in reverse |
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135 count = (stripecount + offset) % stripecount |
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136 parity = (stripecount + offset) / stripecount & 1 |
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137 else: |
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138 count = 0 |
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139 parity = 0 |
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140 while True: |
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141 yield parity |
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142 count += 1 |
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143 if stripecount and count >= stripecount: |
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144 parity = 1 - parity |
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145 count = 0 |
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146 |
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147 def get_contact(config): |
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148 """Return repo contact information or empty string. |
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149 |
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150 web.contact is the primary source, but if that is not set, try |
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151 ui.username or $EMAIL as a fallback to display something useful. |
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152 """ |
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153 return (config("web", "contact") or |
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154 config("ui", "username") or |
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155 os.environ.get("EMAIL") or "") |
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156 |
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157 def caching(web, req): |
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158 tag = str(web.mtime) |
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159 if req.env.get('HTTP_IF_NONE_MATCH') == tag: |
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160 raise ErrorResponse(HTTP_NOT_MODIFIED) |
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161 req.headers.append(('ETag', tag)) |