Lib/dos-8x3/simpleht.py

   1 """Simple HTTP Server.
   2
   3 This module builds on BaseHTTPServer by implementing the standard GET
   4 and HEAD requests in a fairly straightforward manner.
   5
   6 """
   7
   8
   9 __version__ = "0.3"
  10
  11
  12 import os
  13 import sys
  14 import time
  15 import socket
  16 import string
  17 import posixpath
  18 import SocketServer
  19 import BaseHTTPServer
  20
  21
  22 class SimpleHTTPRequestHandler(BaseHTTPServer.BaseHTTPRequestHandler):
  23
  24     """Simple HTTP request handler with GET and HEAD commands.
  25
  26     This serves files from the current directory and any of its
  27     subdirectories.  It assumes that all files are plain text files
  28     unless they have the extension ".html" in which case it assumes
  29     they are HTML files.
  30
  31     The GET and HEAD requests are identical except that the HEAD
  32     request omits the actual contents of the file.
  33
  34     """
  35
  36     server_version = "SimpleHTTP/" + __version__
  37
  38     def do_GET(self):
  39         """Serve a GET request."""
  40         f = self.send_head()
  41         if f:
  42             self.copyfile(f, self.wfile)
  43             f.close()
  44
  45     def do_HEAD(self):
  46         """Serve a HEAD request."""
  47         f = self.send_head()
  48         if f:
  49             f.close()
  50
  51     def send_head(self):
  52         """Common code for GET and HEAD commands.
  53
  54         This sends the response code and MIME headers.
  55
  56         Return value is either a file object (which has to be copied
  57         to the outputfile by the caller unless the command was HEAD,
  58         and must be closed by the caller under all circumstances), or
  59         None, in which case the caller has nothing further to do.
  60
  61         """
  62         path = self.translate_path(self.path)
  63         if os.path.isdir(path):
  64             self.send_error(403, "Directory listing not supported")
  65             return None
  66         try:
  67             f = open(path, 'rb')
  68         except IOError:
  69             self.send_error(404, "File not found")
  70             return None
  71         self.send_response(200)
  72         self.send_header("Content-type", self.guess_type(path))
  73         self.end_headers()
  74         return f
  75
  76     def translate_path(self, path):
  77         """Translate a /-separated PATH to the local filename syntax.
  78
  79         Components that mean special things to the local file system
  80         (e.g. drive or directory names) are ignored.  (XXX They should
  81         probably be diagnosed.)
  82
  83         """
  84         path = posixpath.normpath(path)
  85         words = string.splitfields(path, '/')
  86         words = filter(None, words)
  87         path = os.getcwd()
  88         for word in words:
  89             drive, word = os.path.splitdrive(word)
  90             head, word = os.path.split(word)
  91             if word in (os.curdir, os.pardir): continue
  92             path = os.path.join(path, word)
  93         return path
  94
  95     def copyfile(self, source, outputfile):
  96         """Copy all data between two file objects.
  97
  98         The SOURCE argument is a file object open for reading
  99         (or anything with a read() method) and the DESTINATION
 100         argument is a file object open for writing (or
 101         anything with a write() method).
 102
 103         The only reason for overriding this would be to change
 104         the block size or perhaps to replace newlines by CRLF
 105         -- note however that this the default server uses this
 106         to copy binary data as well.
 107
 108         """
 109
 110         BLOCKSIZE = 8192
 111         while 1:
 112             data = source.read(BLOCKSIZE)
 113             if not data: break
 114             outputfile.write(data)
 115
 116     def guess_type(self, path):
 117         """Guess the type of a file.
 118
 119         Argument is a PATH (a filename).
 120
 121         Return value is a string of the form type/subtype,
 122         usable for a MIME Content-type header.
 123
 124         The default implementation looks the file's extension
 125         up in the table self.extensions_map, using text/plain
 126         as a default; however it would be permissible (if
 127         slow) to look inside the data to make a better guess.
 128
 129         """
 130
 131         base, ext = posixpath.splitext(path)
 132         if self.extensions_map.has_key(ext):
 133             return self.extensions_map[ext]
 134         ext = string.lower(ext)
 135         if self.extensions_map.has_key(ext):
 136             return self.extensions_map[ext]
 137         else:
 138             return self.extensions_map['']
 139
 140     extensions_map = {
 141             '': 'text/plain',   # Default, *must* be present
 142             '.html': 'text/html',
 143             '.htm': 'text/html',
 144             '.gif': 'image/gif',
 145             '.jpg': 'image/jpeg',
 146             '.jpeg': 'image/jpeg',
 147             }
 148
 149
 150 def test(HandlerClass = SimpleHTTPRequestHandler,
 151          ServerClass = BaseHTTPServer.HTTPServer):
 152     BaseHTTPServer.test(HandlerClass, ServerClass)
 153
 154
 155 if __name__ == '__main__':
 156     test()