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2887
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1 """Simple HTTP Server.
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2
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3 This module builds on BaseHTTPServer by implementing the standard GET
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4 and HEAD requests in a fairly straightforward manner.
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5
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6 """
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7
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8
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9 __version__ = "0.2"
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10
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11
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12 import os
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13 import pwd
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14 import sys
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15 import time
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16 import socket
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17 import string
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18 import posixpath
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19 import SocketServer
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20 import BaseHTTPServer
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21
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22
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23 def nobody_uid():
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24 """Internal routine to get nobody's uid"""
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25 try:
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26 nobody = pwd.getpwnam('nobody')[2]
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27 except pwd.error:
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28 nobody = 1 + max(map(lambda x: x[2], pwd.getpwall()))
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29 return nobody
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30
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31 nobody = nobody_uid()
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32
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33
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34 class SimpleHTTPRequestHandler(BaseHTTPServer.BaseHTTPRequestHandler):
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35
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36 """Simple HTTP request handler with GET and HEAD commands.
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37
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38 This serves files from the current directory and any of its
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39 subdirectories. It assumes that all files are plain text files
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40 unless they have the extension ".html" in which case it assumes
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41 they are HTML files.
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42
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43 The GET and HEAD requests are identical except that the HEAD
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44 request omits the actual contents of the file.
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45
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46 """
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47
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48 server_version = "SimpleHTTP/" + __version__
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49
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50 def do_GET(self):
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51 """Serve a GET request."""
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52 f = self.send_head()
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53 if f:
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54 self.copyfile(f, self.wfile)
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55 f.close()
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56
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57 def do_HEAD(self):
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58 """Serve a HEAD request."""
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59 f = self.send_head()
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60 if f:
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61 f.close()
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62
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63 def send_head(self):
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64 """Common code for GET and HEAD commands.
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65
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66 This sends the response code and MIME headers.
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67
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68 Return value is either a file object (which has to be copied
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69 to the outputfile by the caller unless the command was HEAD,
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70 and must be closed by the caller under all circumstances), or
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71 None, in which case the caller has nothing further to do.
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72
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73 """
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74 path = self.translate_path(self.path)
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75 if os.path.isdir(path):
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76 self.send_error(403, "Directory listing not supported")
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77 return None
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78 try:
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79 f = open(path)
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80 except IOError:
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81 self.send_error(404, "File not found")
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82 return None
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83 self.send_response(200)
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84 self.send_header("Content-type", self.guess_type(path))
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85 self.end_headers()
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86 return f
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87
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88 def translate_path(self, path):
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89 """Translate a /-separated PATH to the local filename syntax.
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90
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91 Components that mean special things to the local file system
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92 (e.g. drive or directory names) are ignored. (XXX They should
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93 probably be diagnosed.)
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94
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95 """
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96 path = posixpath.normpath(path)
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97 words = string.splitfields(path, '/')
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98 words = filter(None, words)
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99 path = os.getcwd()
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100 for word in words:
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101 drive, word = os.path.splitdrive(word)
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102 head, word = os.path.split(word)
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103 if word in (os.curdir, os.pardir): continue
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104 path = os.path.join(path, word)
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105 return path
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106
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107 def copyfile(self, source, outputfile):
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108 """Copy all data between two file objects.
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109
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110 The SOURCE argument is a file object open for reading
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111 (or anything with a read() method) and the DESTINATION
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112 argument is a file object open for writing (or
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113 anything with a write() method).
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114
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115 The only reason for overriding this would be to change
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116 the block size or perhaps to replace newlines by CRLF
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117 -- note however that this the default server uses this
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118 to copy binary data as well.
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119
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120 """
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121
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122 BLOCKSIZE = 8192
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123 while 1:
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124 data = source.read(BLOCKSIZE)
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125 if not data: break
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126 outputfile.write(data)
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127
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128 def guess_type(self, path):
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129 """Guess the type of a file.
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130
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131 Argument is a PATH (a filename).
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132
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133 Return value is a string of the form type/subtype,
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134 usable for a MIME Content-type header.
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135
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136 The default implementation looks the file's extension
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137 up in the table self.extensions_map, using text/plain
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138 as a default; however it would be permissible (if
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139 slow) to look inside the data to make a better guess.
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140
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141 """
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142
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143 base, ext = posixpath.splitext(path)
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144 if self.extensions_map.has_key(ext):
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145 return self.extensions_map[ext]
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146 else:
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147 return self.extensions_map['']
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148
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149 extensions_map = {
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150 '': 'text/plain', # Default, *must* be present
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151 '.html': 'text/html',
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152 }
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153
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154
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155 def test(HandlerClass = SimpleHTTPRequestHandler,
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156 ServerClass = SocketServer.TCPServer):
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157 BaseHTTPServer.test(HandlerClass, ServerClass)
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158
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159
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160 if __name__ == '__main__':
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161 test()
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