Mercurial > hg
annotate mercurial/hgweb/hgweb_mod.py @ 46413:ed43b6fa847e stable
copyright: update to 2021
Differential Revision: https://phab.mercurial-scm.org/D9885
author | Matt Harbison <matt_harbison@yahoo.com> |
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date | Wed, 27 Jan 2021 00:54:57 -0500 |
parents | 89a2afe31e82 |
children | d4ba4d51f85f |
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1 # hgweb/hgweb_mod.py - Web interface for a repository. |
131 | 2 # |
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3 # Copyright 21 May 2005 - (c) 2005 Jake Edge <jake@edge2.net> |
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4 # Copyright 2005-2007 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 from __future__ import absolute_import |
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10 |
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11 import contextlib |
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12 import os |
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13 |
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14 from .common import ( |
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15 ErrorResponse, |
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16 HTTP_BAD_REQUEST, |
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17 cspvalues, |
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18 permhooks, |
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19 statusmessage, |
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20 ) |
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21 from ..pycompat import getattr |
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22 |
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23 from .. import ( |
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24 encoding, |
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25 error, |
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26 extensions, |
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27 formatter, |
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28 hg, |
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29 hook, |
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30 profiling, |
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31 pycompat, |
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32 registrar, |
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33 repoview, |
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34 templatefilters, |
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35 templater, |
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36 templateutil, |
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37 ui as uimod, |
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38 util, |
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39 wireprotoserver, |
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40 ) |
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41 |
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42 from . import ( |
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43 request as requestmod, |
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44 webcommands, |
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45 webutil, |
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46 wsgicgi, |
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47 ) |
138 | 48 |
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49 |
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50 def getstyle(req, configfn, templatepath): |
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51 styles = ( |
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52 req.qsparams.get(b'style', None), |
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53 configfn(b'web', b'style'), |
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54 b'paper', |
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55 ) |
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56 return styles, _stylemap(styles, templatepath) |
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57 |
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58 |
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59 def _stylemap(styles, path=None): |
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60 """Return path to mapfile for a given style. |
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61 |
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62 Searches mapfile in the following locations: |
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63 1. templatepath/style/map |
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64 2. templatepath/map-style |
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65 3. templatepath/map |
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66 """ |
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67 |
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68 for style in styles: |
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69 # only plain name is allowed to honor template paths |
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70 if ( |
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71 not style |
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72 or style in (pycompat.oscurdir, pycompat.ospardir) |
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73 or pycompat.ossep in style |
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74 or pycompat.osaltsep |
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75 and pycompat.osaltsep in style |
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76 ): |
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77 continue |
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78 locations = (os.path.join(style, b'map'), b'map-' + style, b'map') |
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79 |
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80 for location in locations: |
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81 mapfile, fp = templater.try_open_template(location, path) |
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82 if mapfile: |
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83 return style, mapfile, fp |
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84 |
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85 raise RuntimeError(b"No hgweb templates found in %r" % path) |
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86 |
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87 |
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88 def makebreadcrumb(url, prefix=b''): |
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89 """Return a 'URL breadcrumb' list |
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90 |
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91 A 'URL breadcrumb' is a list of URL-name pairs, |
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92 corresponding to each of the path items on a URL. |
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93 This can be used to create path navigation entries. |
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94 """ |
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95 if url.endswith(b'/'): |
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96 url = url[:-1] |
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97 if prefix: |
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98 url = b'/' + prefix + url |
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99 relpath = url |
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100 if relpath.startswith(b'/'): |
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101 relpath = relpath[1:] |
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102 |
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103 breadcrumb = [] |
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104 urlel = url |
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105 pathitems = [b''] + relpath.split(b'/') |
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106 for pathel in reversed(pathitems): |
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107 if not pathel or not urlel: |
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108 break |
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109 breadcrumb.append({b'url': urlel, b'name': pathel}) |
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110 urlel = os.path.dirname(urlel) |
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111 return templateutil.mappinglist(reversed(breadcrumb)) |
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112 |
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113 |
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114 class requestcontext(object): |
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115 """Holds state/context for an individual request. |
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116 |
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117 Servers can be multi-threaded. Holding state on the WSGI application |
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118 is prone to race conditions. Instances of this class exist to hold |
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119 mutable and race-free state for requests. |
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120 """ |
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121 |
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122 def __init__(self, app, repo, req, res): |
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123 self.repo = repo |
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124 self.reponame = app.reponame |
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125 self.req = req |
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126 self.res = res |
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127 |
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128 self.maxchanges = self.configint(b'web', b'maxchanges') |
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129 self.stripecount = self.configint(b'web', b'stripes') |
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130 self.maxshortchanges = self.configint(b'web', b'maxshortchanges') |
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131 self.maxfiles = self.configint(b'web', b'maxfiles') |
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132 self.allowpull = self.configbool(b'web', b'allow-pull') |
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133 |
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134 # we use untrusted=False to prevent a repo owner from using |
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135 # web.templates in .hg/hgrc to get access to any file readable |
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136 # by the user running the CGI script |
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137 self.templatepath = self.config(b'web', b'templates', untrusted=False) |
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138 |
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139 # This object is more expensive to build than simple config values. |
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140 # It is shared across requests. The app will replace the object |
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141 # if it is updated. Since this is a reference and nothing should |
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142 # modify the underlying object, it should be constant for the lifetime |
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143 # of the request. |
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144 self.websubtable = app.websubtable |
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145 |
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146 self.csp, self.nonce = cspvalues(self.repo.ui) |
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147 |
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148 # Trust the settings from the .hg/hgrc files by default. |
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149 def config(self, *args, **kwargs): |
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150 kwargs.setdefault('untrusted', True) |
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151 return self.repo.ui.config(*args, **kwargs) |
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152 |
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153 def configbool(self, *args, **kwargs): |
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154 kwargs.setdefault('untrusted', True) |
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155 return self.repo.ui.configbool(*args, **kwargs) |
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156 |
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157 def configint(self, *args, **kwargs): |
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158 kwargs.setdefault('untrusted', True) |
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159 return self.repo.ui.configint(*args, **kwargs) |
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160 |
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161 def configlist(self, *args, **kwargs): |
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162 kwargs.setdefault('untrusted', True) |
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163 return self.repo.ui.configlist(*args, **kwargs) |
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164 |
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165 def archivelist(self, nodeid): |
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166 return webutil.archivelist(self.repo.ui, nodeid) |
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167 |
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168 def templater(self, req): |
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169 # determine scheme, port and server name |
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170 # this is needed to create absolute urls |
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171 logourl = self.config(b'web', b'logourl') |
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172 logoimg = self.config(b'web', b'logoimg') |
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173 staticurl = ( |
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174 self.config(b'web', b'staticurl') |
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175 or req.apppath.rstrip(b'/') + b'/static/' |
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176 ) |
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177 if not staticurl.endswith(b'/'): |
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178 staticurl += b'/' |
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179 |
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180 # figure out which style to use |
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181 |
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182 vars = {} |
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183 styles, (style, mapfile, fp) = getstyle( |
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184 req, self.config, self.templatepath |
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185 ) |
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186 if style == styles[0]: |
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187 vars[b'style'] = style |
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188 |
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189 sessionvars = webutil.sessionvars(vars, b'?') |
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190 |
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191 if not self.reponame: |
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192 self.reponame = ( |
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193 self.config(b'web', b'name', b'') |
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194 or req.reponame |
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195 or req.apppath |
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196 or self.repo.root |
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197 ) |
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198 |
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199 filters = {} |
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200 templatefilter = registrar.templatefilter(filters) |
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201 |
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202 @templatefilter(b'websub', intype=bytes) |
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203 def websubfilter(text): |
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204 return templatefilters.websub(text, self.websubtable) |
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205 |
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206 # create the templater |
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207 # TODO: export all keywords: defaults = templatekw.keywords.copy() |
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208 defaults = { |
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209 b'url': req.apppath + b'/', |
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210 b'logourl': logourl, |
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211 b'logoimg': logoimg, |
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212 b'staticurl': staticurl, |
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213 b'urlbase': req.advertisedbaseurl, |
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214 b'repo': self.reponame, |
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215 b'encoding': encoding.encoding, |
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216 b'sessionvars': sessionvars, |
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217 b'pathdef': makebreadcrumb(req.apppath), |
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218 b'style': style, |
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219 b'nonce': self.nonce, |
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220 } |
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221 templatekeyword = registrar.templatekeyword(defaults) |
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222 |
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223 @templatekeyword(b'motd', requires=()) |
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224 def motd(context, mapping): |
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225 yield self.config(b'web', b'motd') |
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226 |
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227 tres = formatter.templateresources(self.repo.ui, self.repo) |
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228 return templater.templater.frommapfile( |
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229 mapfile, fp=fp, filters=filters, defaults=defaults, resources=tres |
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230 ) |
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231 |
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232 def sendtemplate(self, name, **kwargs): |
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233 """Helper function to send a response generated from a template.""" |
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234 kwargs = pycompat.byteskwargs(kwargs) |
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235 self.res.setbodygen(self.tmpl.generate(name, kwargs)) |
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236 return self.res.sendresponse() |
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237 |
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238 |
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239 class hgweb(object): |
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240 """HTTP server for individual repositories. |
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241 |
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242 Instances of this class serve HTTP responses for a particular |
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243 repository. |
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244 |
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245 Instances are typically used as WSGI applications. |
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246 |
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247 Some servers are multi-threaded. On these servers, there may |
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248 be multiple active threads inside __call__. |
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249 """ |
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250 |
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251 def __init__(self, repo, name=None, baseui=None): |
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252 if isinstance(repo, bytes): |
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253 if baseui: |
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254 u = baseui.copy() |
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255 else: |
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256 u = uimod.ui.load() |
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257 extensions.loadall(u) |
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258 extensions.populateui(u) |
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259 r = hg.repository(u, repo) |
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261 # we trust caller to give us a private copy |
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262 r = repo |
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263 |
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264 r.ui.setconfig(b'ui', b'report_untrusted', b'off', b'hgweb') |
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265 r.baseui.setconfig(b'ui', b'report_untrusted', b'off', b'hgweb') |
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266 r.ui.setconfig(b'ui', b'nontty', b'true', b'hgweb') |
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267 r.baseui.setconfig(b'ui', b'nontty', b'true', b'hgweb') |
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268 # resolve file patterns relative to repo root |
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269 r.ui.setconfig(b'ui', b'forcecwd', r.root, b'hgweb') |
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270 r.baseui.setconfig(b'ui', b'forcecwd', r.root, b'hgweb') |
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271 # it's unlikely that we can replace signal handlers in WSGI server, |
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272 # and mod_wsgi issues a big warning. a plain hgweb process (with no |
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273 # threading) could replace signal handlers, but we don't bother |
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274 # conditionally enabling it. |
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275 r.ui.setconfig(b'ui', b'signal-safe-lock', b'false', b'hgweb') |
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276 r.baseui.setconfig(b'ui', b'signal-safe-lock', b'false', b'hgweb') |
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277 # displaying bundling progress bar while serving feel wrong and may |
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278 # break some wsgi implementation. |
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279 r.ui.setconfig(b'progress', b'disable', b'true', b'hgweb') |
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280 r.baseui.setconfig(b'progress', b'disable', b'true', b'hgweb') |
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281 self._repos = [hg.cachedlocalrepo(self._webifyrepo(r))] |
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282 self._lastrepo = self._repos[0] |
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283 hook.redirect(True) |
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284 self.reponame = name |
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285 |
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286 def _webifyrepo(self, repo): |
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287 repo = getwebview(repo) |
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288 self.websubtable = webutil.getwebsubs(repo) |
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289 return repo |
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290 |
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291 @contextlib.contextmanager |
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292 def _obtainrepo(self): |
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293 """Obtain a repo unique to the caller. |
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294 |
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295 Internally we maintain a stack of cachedlocalrepo instances |
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296 to be handed out. If one is available, we pop it and return it, |
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297 ensuring it is up to date in the process. If one is not available, |
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298 we clone the most recently used repo instance and return it. |
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299 |
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300 It is currently possible for the stack to grow without bounds |
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301 if the server allows infinite threads. However, servers should |
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302 have a thread limit, thus establishing our limit. |
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303 """ |
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304 if self._repos: |
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305 cached = self._repos.pop() |
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306 r, created = cached.fetch() |
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307 else: |
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308 cached = self._lastrepo.copy() |
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309 r, created = cached.fetch() |
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310 if created: |
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311 r = self._webifyrepo(r) |
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312 |
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313 self._lastrepo = cached |
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314 self.mtime = cached.mtime |
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315 try: |
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316 yield r |
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317 finally: |
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318 self._repos.append(cached) |
258 | 319 |
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320 def run(self): |
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321 """Start a server from CGI environment. |
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322 |
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323 Modern servers should be using WSGI and should avoid this |
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324 method, if possible. |
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325 """ |
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326 if not encoding.environ.get(b'GATEWAY_INTERFACE', b'').startswith( |
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327 b"CGI/1." |
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328 ): |
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329 raise RuntimeError( |
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330 b"This function is only intended to be " |
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331 b"called while running as a CGI script." |
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332 ) |
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333 wsgicgi.launch(self) |
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334 |
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335 def __call__(self, env, respond): |
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336 """Run the WSGI application. |
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337 |
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338 This may be called by multiple threads. |
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339 """ |
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340 req = requestmod.parserequestfromenv(env) |
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341 res = requestmod.wsgiresponse(req, respond) |
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342 |
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343 return self.run_wsgi(req, res) |
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344 |
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345 def run_wsgi(self, req, res): |
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346 """Internal method to run the WSGI application. |
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347 |
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348 This is typically only called by Mercurial. External consumers |
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349 should be using instances of this class as the WSGI application. |
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350 """ |
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351 with self._obtainrepo() as repo: |
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352 profile = repo.ui.configbool(b'profiling', b'enabled') |
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353 with profiling.profile(repo.ui, enabled=profile): |
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354 for r in self._runwsgi(req, res, repo): |
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355 yield r |
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356 |
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357 def _runwsgi(self, req, res, repo): |
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358 rctx = requestcontext(self, repo, req, res) |
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359 |
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360 # This state is global across all threads. |
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361 encoding.encoding = rctx.config(b'web', b'encoding') |
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362 rctx.repo.ui.environ = req.rawenv |
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363 |
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364 if rctx.csp: |
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365 # hgwebdir may have added CSP header. Since we generate our own, |
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366 # replace it. |
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367 res.headers[b'Content-Security-Policy'] = rctx.csp |
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368 |
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369 # /api/* is reserved for various API implementations. Dispatch |
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370 # accordingly. But URL paths can conflict with subrepos and virtual |
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371 # repos in hgwebdir. So until we have a workaround for this, only |
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372 # expose the URLs if the feature is enabled. |
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373 apienabled = rctx.repo.ui.configbool(b'experimental', b'web.apiserver') |
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374 if apienabled and req.dispatchparts and req.dispatchparts[0] == b'api': |
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375 wireprotoserver.handlewsgiapirequest( |
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376 rctx, req, res, self.check_perm |
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377 ) |
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378 return res.sendresponse() |
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379 |
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380 handled = wireprotoserver.handlewsgirequest( |
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381 rctx, req, res, self.check_perm |
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382 ) |
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383 if handled: |
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384 return res.sendresponse() |
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385 |
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386 # Old implementations of hgweb supported dispatching the request via |
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387 # the initial query string parameter instead of using PATH_INFO. |
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388 # If PATH_INFO is present (signaled by ``req.dispatchpath`` having |
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389 # a value), we use it. Otherwise fall back to the query string. |
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390 if req.dispatchpath is not None: |
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391 query = req.dispatchpath |
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392 else: |
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393 query = req.querystring.partition(b'&')[0].partition(b';')[0] |
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394 |
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395 # translate user-visible url structure to internal structure |
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396 |
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397 args = query.split(b'/', 2) |
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398 if b'cmd' not in req.qsparams and args and args[0]: |
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399 cmd = args.pop(0) |
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400 style = cmd.rfind(b'-') |
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401 if style != -1: |
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402 req.qsparams[b'style'] = cmd[:style] |
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403 cmd = cmd[style + 1 :] |
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404 |
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405 # avoid accepting e.g. style parameter as command |
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406 if util.safehasattr(webcommands, cmd): |
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407 req.qsparams[b'cmd'] = cmd |
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408 |
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409 if cmd == b'static': |
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410 req.qsparams[b'file'] = b'/'.join(args) |
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411 else: |
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412 if args and args[0]: |
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413 node = args.pop(0).replace(b'%2F', b'/') |
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414 req.qsparams[b'node'] = node |
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415 if args: |
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416 if b'file' in req.qsparams: |
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417 del req.qsparams[b'file'] |
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418 for a in args: |
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419 req.qsparams.add(b'file', a) |
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420 |
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421 ua = req.headers.get(b'User-Agent', b'') |
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422 if cmd == b'rev' and b'mercurial' in ua: |
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423 req.qsparams[b'style'] = b'raw' |
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424 |
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425 if cmd == b'archive': |
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426 fn = req.qsparams[b'node'] |
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427 for type_, spec in pycompat.iteritems(webutil.archivespecs): |
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428 ext = spec[2] |
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429 if fn.endswith(ext): |
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430 req.qsparams[b'node'] = fn[: -len(ext)] |
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431 req.qsparams[b'type'] = type_ |
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432 else: |
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433 cmd = req.qsparams.get(b'cmd', b'') |
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434 |
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435 # process the web interface request |
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436 |
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437 try: |
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438 rctx.tmpl = rctx.templater(req) |
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439 ctype = rctx.tmpl.render( |
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440 b'mimetype', {b'encoding': encoding.encoding} |
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441 ) |
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442 |
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443 # check read permissions non-static content |
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444 if cmd != b'static': |
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445 self.check_perm(rctx, req, None) |
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446 |
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447 if cmd == b'': |
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448 req.qsparams[b'cmd'] = rctx.tmpl.render(b'default', {}) |
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449 cmd = req.qsparams[b'cmd'] |
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450 |
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451 # Don't enable caching if using a CSP nonce because then it wouldn't |
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452 # be a nonce. |
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453 if rctx.configbool(b'web', b'cache') and not rctx.nonce: |
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454 tag = b'W/"%d"' % self.mtime |
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455 if req.headers.get(b'If-None-Match') == tag: |
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456 res.status = b'304 Not Modified' |
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457 # Content-Type may be defined globally. It isn't valid on a |
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458 # 304, so discard it. |
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459 try: |
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460 del res.headers[b'Content-Type'] |
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461 except KeyError: |
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462 pass |
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463 # Response body not allowed on 304. |
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464 res.setbodybytes(b'') |
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465 return res.sendresponse() |
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466 |
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467 res.headers[b'ETag'] = tag |
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468 |
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469 if cmd not in webcommands.__all__: |
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470 msg = b'no such method: %s' % cmd |
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471 raise ErrorResponse(HTTP_BAD_REQUEST, msg) |
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472 else: |
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473 # Set some globals appropriate for web handlers. Commands can |
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474 # override easily enough. |
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475 res.status = b'200 Script output follows' |
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476 res.headers[b'Content-Type'] = ctype |
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477 return getattr(webcommands, cmd)(rctx) |
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478 |
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479 except (error.LookupError, error.RepoLookupError) as err: |
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480 msg = pycompat.bytestr(err) |
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481 if util.safehasattr(err, b'name') and not isinstance( |
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482 err, error.ManifestLookupError |
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483 ): |
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484 msg = b'revision not found: %s' % err.name |
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485 |
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486 res.status = b'404 Not Found' |
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487 res.headers[b'Content-Type'] = ctype |
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488 return rctx.sendtemplate(b'error', error=msg) |
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489 except (error.RepoError, error.StorageError) as e: |
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490 res.status = b'500 Internal Server Error' |
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491 res.headers[b'Content-Type'] = ctype |
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492 return rctx.sendtemplate(b'error', error=pycompat.bytestr(e)) |
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493 except error.Abort as e: |
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494 res.status = b'403 Forbidden' |
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495 res.headers[b'Content-Type'] = ctype |
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496 return rctx.sendtemplate(b'error', error=e.message) |
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497 except ErrorResponse as e: |
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498 for k, v in e.headers: |
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499 res.headers[k] = v |
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500 res.status = statusmessage(e.code, pycompat.bytestr(e)) |
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501 res.headers[b'Content-Type'] = ctype |
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502 return rctx.sendtemplate(b'error', error=pycompat.bytestr(e)) |
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503 |
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504 def check_perm(self, rctx, req, op): |
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505 for permhook in permhooks: |
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506 permhook(rctx, req, op) |
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507 |
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508 |
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509 def getwebview(repo): |
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510 """The 'web.view' config controls changeset filter to hgweb. Possible |
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511 values are ``served``, ``visible`` and ``all``. Default is ``served``. |
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512 The ``served`` filter only shows changesets that can be pulled from the |
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513 hgweb instance. The``visible`` filter includes secret changesets but |
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514 still excludes "hidden" one. |
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515 |
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516 See the repoview module for details. |
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517 |
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518 The option has been around undocumented since Mercurial 2.5, but no |
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519 user ever asked about it. So we better keep it undocumented for now.""" |
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520 # experimental config: web.view |
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521 viewconfig = repo.ui.config(b'web', b'view', untrusted=True) |
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522 if viewconfig == b'all': |
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523 return repo.unfiltered() |
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524 elif viewconfig in repoview.filtertable: |
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525 return repo.filtered(viewconfig) |
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526 else: |
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527 return repo.filtered(b'served') |