annotate mercurial/urllibcompat.py @ 44093:06e7e7652ac0

graftcopies: document why the function is useful at all Despite having spent a significant amount on time on the copy-tracing code, I thought `graftcopies()` (formerly known as `duplicatecopies()`) was needed to duplicate copies after calling `merge.update()` to do a merge (as `merge.graft()` does), but it's actually usually not needed; `merge.update()` takes care of most copies. This patch documents what the function is for. Differential Revision: https://phab.mercurial-scm.org/D7861
author Martin von Zweigbergk <martinvonz@google.com>
date Sun, 29 Dec 2019 17:53:48 -0800
parents 9f70512ae2cf
children 89a2afe31e82
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1 # urllibcompat.py - adapters to ease using urllib2 on Py2 and urllib on Py3
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2 #
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3 # Copyright 2017 Google, Inc.
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4 #
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5 # This software may be used and distributed according to the terms of the
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6 # GNU General Public License version 2 or any later version.
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7 from __future__ import absolute_import
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8
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9 from .pycompat import getattr
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10 from . import pycompat
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11
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12 _sysstr = pycompat.sysstr
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13
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14
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15 class _pycompatstub(object):
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16 def __init__(self):
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17 self._aliases = {}
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18
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19 def _registeraliases(self, origin, items):
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20 """Add items that will be populated at the first access"""
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21 items = map(_sysstr, items)
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22 self._aliases.update(
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23 (item.replace('_', '').lower(), (origin, item)) for item in items
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24 )
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25
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26 def _registeralias(self, origin, attr, name):
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27 """Alias ``origin``.``attr`` as ``name``"""
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28 self._aliases[_sysstr(name)] = (origin, _sysstr(attr))
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29
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30 def __getattr__(self, name):
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31 try:
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32 origin, item = self._aliases[name]
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33 except KeyError:
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34 raise AttributeError(name)
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35 self.__dict__[name] = obj = getattr(origin, item)
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36 return obj
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37
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39 httpserver = _pycompatstub()
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40 urlreq = _pycompatstub()
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41 urlerr = _pycompatstub()
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42
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43 if pycompat.ispy3:
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44 import urllib.parse
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45
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46 urlreq._registeraliases(
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47 urllib.parse,
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48 (
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49 b"splitattr",
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50 b"splitpasswd",
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51 b"splitport",
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52 b"splituser",
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53 b"urlparse",
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54 b"urlunparse",
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55 ),
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56 )
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57 urlreq._registeralias(urllib.parse, b"parse_qs", b"parseqs")
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58 urlreq._registeralias(urllib.parse, b"parse_qsl", b"parseqsl")
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59 urlreq._registeralias(urllib.parse, b"unquote_to_bytes", b"unquote")
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60 import urllib.request
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61
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62 urlreq._registeraliases(
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63 urllib.request,
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64 (
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65 b"AbstractHTTPHandler",
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66 b"BaseHandler",
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67 b"build_opener",
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68 b"FileHandler",
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69 b"FTPHandler",
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70 b"ftpwrapper",
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71 b"HTTPHandler",
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72 b"HTTPSHandler",
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73 b"install_opener",
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74 b"pathname2url",
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75 b"HTTPBasicAuthHandler",
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76 b"HTTPDigestAuthHandler",
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77 b"HTTPPasswordMgrWithDefaultRealm",
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78 b"ProxyHandler",
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79 b"Request",
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80 b"url2pathname",
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81 b"urlopen",
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82 ),
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83 )
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84 import urllib.response
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85
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86 urlreq._registeraliases(urllib.response, (b"addclosehook", b"addinfourl",))
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87 import urllib.error
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88
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89 urlerr._registeraliases(urllib.error, (b"HTTPError", b"URLError",))
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90 import http.server
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91
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92 httpserver._registeraliases(
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93 http.server,
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94 (
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95 b"HTTPServer",
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96 b"BaseHTTPRequestHandler",
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97 b"SimpleHTTPRequestHandler",
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98 b"CGIHTTPRequestHandler",
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99 ),
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100 )
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101
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102 # urllib.parse.quote() accepts both str and bytes, decodes bytes
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103 # (if necessary), and returns str. This is wonky. We provide a custom
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104 # implementation that only accepts bytes and emits bytes.
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105 def quote(s, safe='/'):
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106 # bytestr has an __iter__ that emits characters. quote_from_bytes()
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107 # does an iteration and expects ints. We coerce to bytes to appease it.
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108 if isinstance(s, pycompat.bytestr):
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109 s = bytes(s)
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110 s = urllib.parse.quote_from_bytes(s, safe=safe)
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111 return s.encode('ascii', 'strict')
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112
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113 # urllib.parse.urlencode() returns str. We use this function to make
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114 # sure we return bytes.
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115 def urlencode(query, doseq=False):
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116 s = urllib.parse.urlencode(query, doseq=doseq)
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117 return s.encode('ascii')
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118
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119 urlreq.quote = quote
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120 urlreq.urlencode = urlencode
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122 def getfullurl(req):
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123 return req.full_url
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124
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125 def gethost(req):
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126 return req.host
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127
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128 def getselector(req):
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129 return req.selector
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130
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131 def getdata(req):
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132 return req.data
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133
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134 def hasdata(req):
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135 return req.data is not None
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136
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137
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138 else:
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139 import BaseHTTPServer
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140 import CGIHTTPServer
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141 import SimpleHTTPServer
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142 import urllib2
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143 import urllib
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144 import urlparse
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145
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146 urlreq._registeraliases(
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147 urllib,
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148 (
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149 b"addclosehook",
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150 b"addinfourl",
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151 b"ftpwrapper",
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152 b"pathname2url",
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153 b"quote",
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154 b"splitattr",
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155 b"splitpasswd",
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156 b"splitport",
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157 b"splituser",
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158 b"unquote",
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159 b"url2pathname",
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160 b"urlencode",
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161 ),
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162 )
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163 urlreq._registeraliases(
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164 urllib2,
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165 (
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166 b"AbstractHTTPHandler",
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167 b"BaseHandler",
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168 b"build_opener",
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169 b"FileHandler",
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170 b"FTPHandler",
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171 b"HTTPBasicAuthHandler",
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172 b"HTTPDigestAuthHandler",
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173 b"HTTPHandler",
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174 b"HTTPPasswordMgrWithDefaultRealm",
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175 b"HTTPSHandler",
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176 b"install_opener",
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177 b"ProxyHandler",
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178 b"Request",
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179 b"urlopen",
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180 ),
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181 )
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182 urlreq._registeraliases(urlparse, (b"urlparse", b"urlunparse",))
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183 urlreq._registeralias(urlparse, b"parse_qs", b"parseqs")
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184 urlreq._registeralias(urlparse, b"parse_qsl", b"parseqsl")
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185 urlerr._registeraliases(urllib2, (b"HTTPError", b"URLError",))
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186 httpserver._registeraliases(
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187 BaseHTTPServer, (b"HTTPServer", b"BaseHTTPRequestHandler",)
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188 )
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189 httpserver._registeraliases(
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190 SimpleHTTPServer, (b"SimpleHTTPRequestHandler",)
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191 )
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192 httpserver._registeraliases(CGIHTTPServer, (b"CGIHTTPRequestHandler",))
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193
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194 def gethost(req):
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195 return req.get_host()
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196
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197 def getselector(req):
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198 return req.get_selector()
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199
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200 def getfullurl(req):
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201 return req.get_full_url()
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202
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203 def getdata(req):
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204 return req.get_data()
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205
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206 def hasdata(req):
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207 return req.has_data()