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socketserver renaming reversal part 3: move the module into the right place and fix all references to it. Closes #2926.
author Georg Brandl <georg@python.org>
date Sat, 24 May 2008 18:31:28 +0000
parents a375b1346eb3
children 662d15af52df
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2 :mod:`BaseHTTPServer` --- Basic HTTP server
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3 ===========================================
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5 .. module:: BaseHTTPServer
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6 :synopsis: Basic HTTP server (base class for SimpleHTTPServer and CGIHTTPServer).
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9 .. index::
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10 pair: WWW; server
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11 pair: HTTP; protocol
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12 single: URL
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13 single: httpd
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15 .. index::
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16 module: SimpleHTTPServer
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17 module: CGIHTTPServer
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18
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19 This module defines two classes for implementing HTTP servers (Web servers).
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20 Usually, this module isn't used directly, but is used as a basis for building
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21 functioning Web servers. See the :mod:`SimpleHTTPServer` and
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22 :mod:`CGIHTTPServer` modules.
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23
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24 The first class, :class:`HTTPServer`, is a :class:`SocketServer.TCPServer`
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25 subclass. It creates and listens at the HTTP socket, dispatching the requests
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26 to a handler. Code to create and run the server looks like this::
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28 def run(server_class=BaseHTTPServer.HTTPServer,
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29 handler_class=BaseHTTPServer.BaseHTTPRequestHandler):
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30 server_address = ('', 8000)
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31 httpd = server_class(server_address, handler_class)
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32 httpd.serve_forever()
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35 .. class:: HTTPServer(server_address, RequestHandlerClass)
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37 This class builds on the :class:`TCPServer` class by storing the server
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38 address as instance variables named :attr:`server_name` and
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39 :attr:`server_port`. The server is accessible by the handler, typically
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40 through the handler's :attr:`server` instance variable.
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43 .. class:: BaseHTTPRequestHandler(request, client_address, server)
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44
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45 This class is used to handle the HTTP requests that arrive at the server. By
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46 itself, it cannot respond to any actual HTTP requests; it must be subclassed
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47 to handle each request method (e.g. GET or
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48 POST). :class:`BaseHTTPRequestHandler` provides a number of class and
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49 instance variables, and methods for use by subclasses.
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51 The handler will parse the request and the headers, then call a method
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52 specific to the request type. The method name is constructed from the
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53 request. For example, for the request method ``SPAM``, the :meth:`do_SPAM`
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54 method will be called with no arguments. All of the relevant information is
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55 stored in instance variables of the handler. Subclasses should not need to
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56 override or extend the :meth:`__init__` method.
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58 :class:`BaseHTTPRequestHandler` has the following instance variables:
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61 .. attribute:: client_address
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63 Contains a tuple of the form ``(host, port)`` referring to the client's
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64 address.
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67 .. attribute:: command
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69 Contains the command (request type). For example, ``'GET'``.
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72 .. attribute:: path
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74 Contains the request path.
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77 .. attribute:: request_version
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79 Contains the version string from the request. For example, ``'HTTP/1.0'``.
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82 .. attribute:: headers
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84 Holds an instance of the class specified by the :attr:`MessageClass` class
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85 variable. This instance parses and manages the headers in the HTTP
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86 request.
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89 .. attribute:: rfile
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91 Contains an input stream, positioned at the start of the optional input
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92 data.
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95 .. attribute:: wfile
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97 Contains the output stream for writing a response back to the
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98 client. Proper adherence to the HTTP protocol must be used when writing to
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99 this stream.
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102 :class:`BaseHTTPRequestHandler` has the following class variables:
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105 .. attribute:: server_version
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107 Specifies the server software version. You may want to override this. The
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108 format is multiple whitespace-separated strings, where each string is of
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109 the form name[/version]. For example, ``'BaseHTTP/0.2'``.
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112 .. attribute:: sys_version
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114 Contains the Python system version, in a form usable by the
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115 :attr:`version_string` method and the :attr:`server_version` class
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116 variable. For example, ``'Python/1.4'``.
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119 .. attribute:: error_message_format
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121 Specifies a format string for building an error response to the client. It
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122 uses parenthesized, keyed format specifiers, so the format operand must be
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123 a dictionary. The *code* key should be an integer, specifying the numeric
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124 HTTP error code value. *message* should be a string containing a
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125 (detailed) error message of what occurred, and *explain* should be an
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126 explanation of the error code number. Default *message* and *explain*
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127 values can found in the *responses* class variable.
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130 .. attribute:: error_content_type
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132 Specifies the Content-Type HTTP header of error responses sent to the
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133 client. The default value is ``'text/html'``.
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135 .. versionadded:: 2.6
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136 Previously, the content type was always ``'text/html'``.
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139 .. attribute:: protocol_version
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141 This specifies the HTTP protocol version used in responses. If set to
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142 ``'HTTP/1.1'``, the server will permit HTTP persistent connections;
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143 however, your server *must* then include an accurate ``Content-Length``
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144 header (using :meth:`send_header`) in all of its responses to clients.
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145 For backwards compatibility, the setting defaults to ``'HTTP/1.0'``.
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146
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147
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148 .. attribute:: MessageClass
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149
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150 .. index:: single: Message (in module mimetools)
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151
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152 Specifies a :class:`rfc822.Message`\ -like class to parse HTTP headers.
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153 Typically, this is not overridden, and it defaults to
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154 :class:`mimetools.Message`.
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155
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156
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157 .. attribute:: responses
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158
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159 This variable contains a mapping of error code integers to two-element tuples
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160 containing a short and long message. For example, ``{code: (shortmessage,
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161 longmessage)}``. The *shortmessage* is usually used as the *message* key in an
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162 error response, and *longmessage* as the *explain* key (see the
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163 :attr:`error_message_format` class variable).
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164
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165
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166 A :class:`BaseHTTPRequestHandler` instance has the following methods:
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167
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168
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169 .. method:: handle()
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170
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171 Calls :meth:`handle_one_request` once (or, if persistent connections are
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172 enabled, multiple times) to handle incoming HTTP requests. You should
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173 never need to override it; instead, implement appropriate :meth:`do_\*`
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174 methods.
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175
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176
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177 .. method:: handle_one_request()
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178
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179 This method will parse and dispatch the request to the appropriate
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180 :meth:`do_\*` method. You should never need to override it.
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181
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182
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183 .. method:: send_error(code[, message])
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184
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185 Sends and logs a complete error reply to the client. The numeric *code*
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186 specifies the HTTP error code, with *message* as optional, more specific text. A
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187 complete set of headers is sent, followed by text composed using the
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188 :attr:`error_message_format` class variable.
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189
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190
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191 .. method:: send_response(code[, message])
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192
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193 Sends a response header and logs the accepted request. The HTTP response
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194 line is sent, followed by *Server* and *Date* headers. The values for
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195 these two headers are picked up from the :meth:`version_string` and
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196 :meth:`date_time_string` methods, respectively.
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197
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198
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199 .. method:: send_header(keyword, value)
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200
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201 Writes a specific HTTP header to the output stream. *keyword* should
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202 specify the header keyword, with *value* specifying its value.
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203
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204
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205 .. method:: end_headers()
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206
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207 Sends a blank line, indicating the end of the HTTP headers in the
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208 response.
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209
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210
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211 .. method:: log_request([code[, size]])
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212
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213 Logs an accepted (successful) request. *code* should specify the numeric
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214 HTTP code associated with the response. If a size of the response is
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215 available, then it should be passed as the *size* parameter.
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216
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217
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218 .. method:: log_error(...)
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219
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220 Logs an error when a request cannot be fulfilled. By default, it passes
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221 the message to :meth:`log_message`, so it takes the same arguments
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222 (*format* and additional values).
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223
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224
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225 .. method:: log_message(format, ...)
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226
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227 Logs an arbitrary message to ``sys.stderr``. This is typically overridden
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228 to create custom error logging mechanisms. The *format* argument is a
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229 standard printf-style format string, where the additional arguments to
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230 :meth:`log_message` are applied as inputs to the formatting. The client
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231 address and current date and time are prefixed to every message logged.
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232
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233
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234 .. method:: version_string()
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235
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236 Returns the server software's version string. This is a combination of the
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237 :attr:`server_version` and :attr:`sys_version` class variables.
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238
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239
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240 .. method:: date_time_string([timestamp])
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241
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242 Returns the date and time given by *timestamp* (which must be in the
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243 format returned by :func:`time.time`), formatted for a message header. If
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244 *timestamp* is omitted, it uses the current date and time.
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245
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246 The result looks like ``'Sun, 06 Nov 1994 08:49:37 GMT'``.
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247
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248 .. versionadded:: 2.5
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249 The *timestamp* parameter.
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250
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251
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252 .. method:: log_date_time_string()
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253
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254 Returns the current date and time, formatted for logging.
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255
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256
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257 .. method:: address_string()
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258
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259 Returns the client address, formatted for logging. A name lookup is
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260 performed on the client's IP address.
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261
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262
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263 .. seealso::
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264
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265 Module :mod:`CGIHTTPServer`
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266 Extended request handler that supports CGI scripts.
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267
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268 Module :mod:`SimpleHTTPServer`
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269 Basic request handler that limits response to files actually under the document
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270 root.
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271