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	"""HTTP server classes.

	From Python 3.3

	Note: BaseHTTPRequestHandler doesn't implement any HTTP request; see
	SimpleHTTPRequestHandler for simple implementations of GET, HEAD and POST,
	and CGIHTTPRequestHandler for CGI scripts.

	It does, however, optionally implement HTTP/1.1 persistent connections,
	as of version 0.3.

	Notes on CGIHTTPRequestHandler
	------------------------------

	This class implements GET and POST requests to cgi-bin scripts.

	If the os.fork() function is not present (e.g. on Windows),
	subprocess.Popen() is used as a fallback, with slightly altered semantics.

	In all cases, the implementation is intentionally naive -- all
	requests are executed synchronously.

	SECURITY WARNING: DON'T USE THIS CODE UNLESS YOU ARE INSIDE A FIREWALL
	-- it may execute arbitrary Python code or external programs.

	Note that status code 200 is sent prior to execution of a CGI script, so
	scripts cannot send other status codes such as 302 (redirect).

	XXX To do:

	- log requests even later (to capture byte count)
	- log user-agent header and other interesting goodies
	- send error log to separate file
	"""

	from __future__ import (absolute_import, division,
	print_function, unicode_literals)
	from future import utils
	from future.builtins import *


	# See also:
	#
	# HTTP Working Group T. Berners-Lee
	# INTERNET-DRAFT R. T. Fielding
	# <draft-ietf-http-v10-spec-00.txt> H. Frystyk Nielsen
	# Expires September 8, 1995 March 8, 1995
	#
	# URL: http://www.ics.uci.edu/pub/ietf/http/draft-ietf-http-v10-spec-00.txt
	#
	# and
	#
	# Network Working Group R. Fielding
	# Request for Comments: 2616 et al
	# Obsoletes: 2068 June 1999
	# Category: Standards Track
	#
	# URL: http://www.faqs.org/rfcs/rfc2616.html

	# Log files
	# ---------
	#
	# Here's a quote from the NCSA httpd docs about log file format.
	#
	# \| The logfile format is as follows. Each line consists of:
	# \|
	# \| host rfc931 authuser [DD/Mon/YYYY:hh:mm:ss] "request" ddd bbbb
	# \|
	# \| host: Either the DNS name or the IP number of the remote client
	# \| rfc931: Any information returned by identd for this person,
	# \| - otherwise.
	# \| authuser: If user sent a userid for authentication, the user name,
	# \| - otherwise.
	# \| DD: Day
	# \| Mon: Month (calendar name)
	# \| YYYY: Year
	# \| hh: hour (24-hour format, the machine's timezone)
	# \| mm: minutes
	# \| ss: seconds
	# \| request: The first line of the HTTP request as sent by the client.
	# \| ddd: the status code returned by the server, - if not available.
	# \| bbbb: the total number of bytes sent,
	# \| not including the HTTP/1.0 header, - if not available
	# \|
	# \| You can determine the name of the file accessed through request.
	#
	# (Actually, the latter is only true if you know the server configuration
	# at the time the request was made!)

	__version__ = "0.6"

	__all__ = ["HTTPServer", "BaseHTTPRequestHandler"]

	from future.backports import html
	from future.backports.http import client as http_client
	from future.backports.urllib import parse as urllib_parse
	from future.backports import socketserver

	import io
	import mimetypes
	import os
	import posixpath
	import select
	import shutil
	import socket # For gethostbyaddr()
	import sys
	import time
	import copy
	import argparse


	# Default error message template
	DEFAULT_ERROR_MESSAGE = """\
	<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01//EN"
	"http://www.w3.org/TR/html4/strict.dtd">
	<html>
	<head>
	<meta http-equiv="Content-Type" content="text/html;charset=utf-8">
	<title>Error response</title>
	</head>
	<body>
	<h1>Error response</h1>
	<p>Error code: %(code)d</p>
	<p>Message: %(message)s.</p>
	<p>Error code explanation: %(code)s - %(explain)s.</p>
	</body>
	</html>
	"""

	DEFAULT_ERROR_CONTENT_TYPE = "text/html;charset=utf-8"

	def _quote_html(html):
	return html.replace("&", "&").replace("<", "<").replace(">", ">")

	class HTTPServer(socketserver.TCPServer):

	allow_reuse_address = 1 # Seems to make sense in testing environment

	def server_bind(self):
	"""Override server_bind to store the server name."""
	socketserver.TCPServer.server_bind(self)
	host, port = self.socket.getsockname()[:2]
	self.server_name = socket.getfqdn(host)
	self.server_port = port


	class BaseHTTPRequestHandler(socketserver.StreamRequestHandler):

	"""HTTP request handler base class.

	The following explanation of HTTP serves to guide you through the
	code as well as to expose any misunderstandings I may have about
	HTTP (so you don't need to read the code to figure out I'm wrong
	:-).

	HTTP (HyperText Transfer Protocol) is an extensible protocol on
	top of a reliable stream transport (e.g. TCP/IP). The protocol
	recognizes three parts to a request:

	1. One line identifying the request type and path
	2. An optional set of RFC-822-style headers
	3. An optional data part

	The headers and data are separated by a blank line.

	The first line of the request has the form

	<command> <path> <version>

	where <command> is a (case-sensitive) keyword such as GET or POST,
	<path> is a string containing path information for the request,
	and <version> should be the string "HTTP/1.0" or "HTTP/1.1".
	<path> is encoded using the URL encoding scheme (using %xx to signify
	the ASCII character with hex code xx).

	The specification specifies that lines are separated by CRLF but
	for compatibility with the widest range of clients recommends
	servers also handle LF. Similarly, whitespace in the request line
	is treated sensibly (allowing multiple spaces between components
	and allowing trailing whitespace).

	Similarly, for output, lines ought to be separated by CRLF pairs
	but most clients grok LF characters just fine.

	If the first line of the request has the form

	<command> <path>

	(i.e. <version> is left out) then this is assumed to be an HTTP
	0.9 request; this form has no optional headers and data part and
	the reply consists of just the data.

	The reply form of the HTTP 1.x protocol again has three parts:

	1. One line giving the response code
	2. An optional set of RFC-822-style headers
	3. The data

	Again, the headers and data are separated by a blank line.

	The response code line has the form

	<version> <responsecode> <responsestring>

	where <version> is the protocol version ("HTTP/1.0" or "HTTP/1.1"),
	<responsecode> is a 3-digit response code indicating success or
	failure of the request, and <responsestring> is an optional
	human-readable string explaining what the response code means.

	This server parses the request and the headers, and then calls a
	function specific to the request type (<command>). Specifically,
	a request SPAM will be handled by a method do_SPAM(). If no
	such method exists the server sends an error response to the
	client. If it exists, it is called with no arguments:

	do_SPAM()

	Note that the request name is case sensitive (i.e. SPAM and spam
	are different requests).

	The various request details are stored in instance variables:

	- client_address is the client IP address in the form (host,
	port);

	- command, path and version are the broken-down request line;

	- headers is an instance of email.message.Message (or a derived
	class) containing the header information;

	- rfile is a file object open for reading positioned at the
	start of the optional input data part;

	- wfile is a file object open for writing.

	IT IS IMPORTANT TO ADHERE TO THE PROTOCOL FOR WRITING!

	The first thing to be written must be the response line. Then
	follow 0 or more header lines, then a blank line, and then the
	actual data (if any). The meaning of the header lines depends on
	the command executed by the server; in most cases, when data is
	returned, there should be at least one header line of the form

	Content-type: <type>/<subtype>

	where <type> and <subtype> should be registered MIME types,
	e.g. "text/html" or "text/plain".

	"""

	# The Python system version, truncated to its first component.
	sys_version = "Python/" + sys.version.split()[0]

	# The server software version. You may want to override this.
	# The format is multiple whitespace-separated strings,
	# where each string is of the form name[/version].
	server_version = "BaseHTTP/" + __version__

	error_message_format = DEFAULT_ERROR_MESSAGE
	error_content_type = DEFAULT_ERROR_CONTENT_TYPE

	# The default request version. This only affects responses up until
	# the point where the request line is parsed, so it mainly decides what
	# the client gets back when sending a malformed request line.
	# Most web servers default to HTTP 0.9, i.e. don't send a status line.
	default_request_version = "HTTP/0.9"

	def parse_request(self):
	"""Parse a request (internal).

	The request should be stored in self.raw_requestline; the results
	are in self.command, self.path, self.request_version and
	self.headers.

	Return True for success, False for failure; on failure, an
	error is sent back.

	"""
	self.command = None # set in case of error on the first line
	self.request_version = version = self.default_request_version
	self.close_connection = 1
	requestline = str(self.raw_requestline, 'iso-8859-1')
	requestline = requestline.rstrip('\r\n')
	self.requestline = requestline
	words = requestline.split()
	if len(words) == 3:
	command, path, version = words
	if version[:5] != 'HTTP/':
	self.send_error(400, "Bad request version (%r)" % version)
	return False
	try:
	base_version_number = version.split('/', 1)[1]
	version_number = base_version_number.split(".")
	# RFC 2145 section 3.1 says there can be only one "." and
	# - major and minor numbers MUST be treated as
	# separate integers;
	# - HTTP/2.4 is a lower version than HTTP/2.13, which in
	# turn is lower than HTTP/12.3;
	# - Leading zeros MUST be ignored by recipients.
	if len(version_number) != 2:
	raise ValueError
	version_number = int(version_number[0]), int(version_number[1])
	except (ValueError, IndexError):
	self.send_error(400, "Bad request version (%r)" % version)
	return False
	if version_number >= (1, 1) and self.protocol_version >= "HTTP/1.1":
	self.close_connection = 0
	if version_number >= (2, 0):
	self.send_error(505,
	"Invalid HTTP Version (%s)" % base_version_number)
	return False
	elif len(words) == 2:
	command, path = words
	self.close_connection = 1
	if command != 'GET':
	self.send_error(400,
	"Bad HTTP/0.9 request type (%r)" % command)
	return False
	elif not words:
	return False
	else:
	self.send_error(400, "Bad request syntax (%r)" % requestline)
	return False
	self.command, self.path, self.request_version = command, path, version

	# Examine the headers and look for a Connection directive.
	try:
	self.headers = http_client.parse_headers(self.rfile,
	_class=self.MessageClass)
	except http_client.LineTooLong:
	self.send_error(400, "Line too long")
	return False

	conntype = self.headers.get('Connection', "")
	if conntype.lower() == 'close':
	self.close_connection = 1
	elif (conntype.lower() == 'keep-alive' and
	self.protocol_version >= "HTTP/1.1"):
	self.close_connection = 0
	# Examine the headers and look for an Expect directive
	expect = self.headers.get('Expect', "")
	if (expect.lower() == "100-continue" and
	self.protocol_version >= "HTTP/1.1" and
	self.request_version >= "HTTP/1.1"):
	if not self.handle_expect_100():
	return False
	return True

	def handle_expect_100(self):
	"""Decide what to do with an "Expect: 100-continue" header.

	If the client is expecting a 100 Continue response, we must
	respond with either a 100 Continue or a final response before
	waiting for the request body. The default is to always respond
	with a 100 Continue. You can behave differently (for example,
	reject unauthorized requests) by overriding this method.

	This method should either return True (possibly after sending
	a 100 Continue response) or send an error response and return
	False.

	"""
	self.send_response_only(100)
	self.flush_headers()
	return True

	def handle_one_request(self):
	"""Handle a single HTTP request.

	You normally don't need to override this method; see the class
	__doc__ string for information on how to handle specific HTTP
	commands such as GET and POST.

	"""
	try:
	self.raw_requestline = self.rfile.readline(65537)
	if len(self.raw_requestline) > 65536:
	self.requestline = ''
	self.request_version = ''
	self.command = ''
	self.send_error(414)
	return
	if not self.raw_requestline:
	self.close_connection = 1
	return
	if not self.parse_request():
	# An error code has been sent, just exit
	return
	mname = 'do_' + self.command
	if not hasattr(self, mname):
	self.send_error(501, "Unsupported method (%r)" % self.command)
	return
	method = getattr(self, mname)
	method()
	self.wfile.flush() #actually send the response if not already done.
	except socket.timeout as e:
	#a read or a write timed out. Discard this connection
	self.log_error("Request timed out: %r", e)
	self.close_connection = 1
	return

	def handle(self):
	"""Handle multiple requests if necessary."""
	self.close_connection = 1

	self.handle_one_request()
	while not self.close_connection:
	self.handle_one_request()

	def send_error(self, code, message=None):
	"""Send and log an error reply.

	Arguments are the error code, and a detailed message.
	The detailed message defaults to the short entry matching the
	response code.

	This sends an error response (so it must be called before any
	output has been generated), logs the error, and finally sends
	a piece of HTML explaining the error to the user.

	"""

	try:
	shortmsg, longmsg = self.responses[code]
	except KeyError:
	shortmsg, longmsg = '???', '???'
	if message is None:
	message = shortmsg
	explain = longmsg
	self.log_error("code %d, message %s", code, message)
	# using _quote_html to prevent Cross Site Scripting attacks (see bug #1100201)
	content = (self.error_message_format %
	{'code': code, 'message': _quote_html(message), 'explain': explain})
	self.send_response(code, message)
	self.send_header("Content-Type", self.error_content_type)
	self.send_header('Connection', 'close')
	self.end_headers()
	if self.command != 'HEAD' and code >= 200 and code not in (204, 304):
	self.wfile.write(content.encode('UTF-8', 'replace'))

	def send_response(self, code, message=None):
	"""Add the response header to the headers buffer and log the
	response code.

	Also send two standard headers with the server software
	version and the current date.

	"""
	self.log_request(code)
	self.send_response_only(code, message)
	self.send_header('Server', self.version_string())
	self.send_header('Date', self.date_time_string())

	def send_response_only(self, code, message=None):
	"""Send the response header only."""
	if message is None:
	if code in self.responses:
	message = self.responses[code][0]
	else:
	message = ''
	if self.request_version != 'HTTP/0.9':
	if not hasattr(self, '_headers_buffer'):
	self._headers_buffer = []
	self._headers_buffer.append(("%s %d %s\r\n" %
	(self.protocol_version, code, message)).encode(
	'latin-1', 'strict'))

	def send_header(self, keyword, value):
	"""Send a MIME header to the headers buffer."""
	if self.request_version != 'HTTP/0.9':
	if not hasattr(self, '_headers_buffer'):
	self._headers_buffer = []
	self._headers_buffer.append(
	("%s: %s\r\n" % (keyword, value)).encode('latin-1', 'strict'))

	if keyword.lower() == 'connection':
	if value.lower() == 'close':
	self.close_connection = 1
	elif value.lower() == 'keep-alive':
	self.close_connection = 0

	def end_headers(self):
	"""Send the blank line ending the MIME headers."""
	if self.request_version != 'HTTP/0.9':
	self._headers_buffer.append(b"\r\n")
	self.flush_headers()

	def flush_headers(self):
	if hasattr(self, '_headers_buffer'):
	self.wfile.write(b"".join(self._headers_buffer))
	self._headers_buffer = []

	def log_request(self, code='-', size='-'):
	"""Log an accepted request.

	This is called by send_response().

	"""

	self.log_message('"%s" %s %s',
	self.requestline, str(code), str(size))

	def log_error(self, format, *args):
	"""Log an error.

	This is called when a request cannot be fulfilled. By
	default it passes the message on to log_message().

	Arguments are the same as for log_message().

	XXX This should go to the separate error log.

	"""

	self.log_message(format, *args)

	def log_message(self, format, *args):
	"""Log an arbitrary message.

	This is used by all other logging functions. Override
	it if you have specific logging wishes.

	The first argument, FORMAT, is a format string for the
	message to be logged. If the format string contains
	any % escapes requiring parameters, they should be
	specified as subsequent arguments (it's just like
	printf!).

	The client ip and current date/time are prefixed to
	every message.

	"""

	sys.stderr.write("%s - - [%s] %s\n" %
	(self.address_string(),
	self.log_date_time_string(),
	format%args))

	def version_string(self):
	"""Return the server software version string."""
	return self.server_version + ' ' + self.sys_version

	def date_time_string(self, timestamp=None):
	"""Return the current date and time formatted for a message header."""
	if timestamp is None:
	timestamp = time.time()
	year, month, day, hh, mm, ss, wd, y, z = time.gmtime(timestamp)
	s = "%s, %02d %3s %4d %02d:%02d:%02d GMT" % (
	self.weekdayname[wd],
	day, self.monthname[month], year,
	hh, mm, ss)
	return s

	def log_date_time_string(self):
	"""Return the current time formatted for logging."""
	now = time.time()
	year, month, day, hh, mm, ss, x, y, z = time.localtime(now)
	s = "%02d/%3s/%04d %02d:%02d:%02d" % (
	day, self.monthname[month], year, hh, mm, ss)
	return s

	weekdayname = ['Mon', 'Tue', 'Wed', 'Thu', 'Fri', 'Sat', 'Sun']

	monthname = [None,
	'Jan', 'Feb', 'Mar', 'Apr', 'May', 'Jun',
	'Jul', 'Aug', 'Sep', 'Oct', 'Nov', 'Dec']

	def address_string(self):
	"""Return the client address."""

	return self.client_address[0]

	# Essentially static class variables

	# The version of the HTTP protocol we support.
	# Set this to HTTP/1.1 to enable automatic keepalive
	protocol_version = "HTTP/1.0"

	# MessageClass used to parse headers
	MessageClass = http_client.HTTPMessage

	# Table mapping response codes to messages; entries have the
	# form {code: (shortmessage, longmessage)}.
	# See RFC 2616 and 6585.
	responses = {
	100: ('Continue', 'Request received, please continue'),
	101: ('Switching Protocols',
	'Switching to new protocol; obey Upgrade header'),

	200: ('OK', 'Request fulfilled, document follows'),
	201: ('Created', 'Document created, URL follows'),
	202: ('Accepted',
	'Request accepted, processing continues off-line'),
	203: ('Non-Authoritative Information', 'Request fulfilled from cache'),
	204: ('No Content', 'Request fulfilled, nothing follows'),
	205: ('Reset Content', 'Clear input form for further input.'),
	206: ('Partial Content', 'Partial content follows.'),

	300: ('Multiple Choices',
	'Object has several resources -- see URI list'),
	301: ('Moved Permanently', 'Object moved permanently -- see URI list'),
	302: ('Found', 'Object moved temporarily -- see URI list'),
	303: ('See Other', 'Object moved -- see Method and URL list'),
	304: ('Not Modified',
	'Document has not changed since given time'),
	305: ('Use Proxy',
	'You must use proxy specified in Location to access this '
	'resource.'),
	307: ('Temporary Redirect',
	'Object moved temporarily -- see URI list'),

	400: ('Bad Request',
	'Bad request syntax or unsupported method'),
	401: ('Unauthorized',
	'No permission -- see authorization schemes'),
	402: ('Payment Required',
	'No payment -- see charging schemes'),
	403: ('Forbidden',
	'Request forbidden -- authorization will not help'),
	404: ('Not Found', 'Nothing matches the given URI'),
	405: ('Method Not Allowed',
	'Specified method is invalid for this resource.'),
	406: ('Not Acceptable', 'URI not available in preferred format.'),
	407: ('Proxy Authentication Required', 'You must authenticate with '
	'this proxy before proceeding.'),
	408: ('Request Timeout', 'Request timed out; try again later.'),
	409: ('Conflict', 'Request conflict.'),
	410: ('Gone',
	'URI no longer exists and has been permanently removed.'),
	411: ('Length Required', 'Client must specify Content-Length.'),
	412: ('Precondition Failed', 'Precondition in headers is false.'),
	413: ('Request Entity Too Large', 'Entity is too large.'),
	414: ('Request-URI Too Long', 'URI is too long.'),
	415: ('Unsupported Media Type', 'Entity body in unsupported format.'),
	416: ('Requested Range Not Satisfiable',
	'Cannot satisfy request range.'),
	417: ('Expectation Failed',
	'Expect condition could not be satisfied.'),
	428: ('Precondition Required',
	'The origin server requires the request to be conditional.'),
	429: ('Too Many Requests', 'The user has sent too many requests '
	'in a given amount of time ("rate limiting").'),
	431: ('Request Header Fields Too Large', 'The server is unwilling to '
	'process the request because its header fields are too large.'),

	500: ('Internal Server Error', 'Server got itself in trouble'),
	501: ('Not Implemented',
	'Server does not support this operation'),
	502: ('Bad Gateway', 'Invalid responses from another server/proxy.'),
	503: ('Service Unavailable',
	'The server cannot process the request due to a high load'),
	504: ('Gateway Timeout',
	'The gateway server did not receive a timely response'),
	505: ('HTTP Version Not Supported', 'Cannot fulfill request.'),
	511: ('Network Authentication Required',
	'The client needs to authenticate to gain network access.'),
	}


	class SimpleHTTPRequestHandler(BaseHTTPRequestHandler):

	"""Simple HTTP request handler with GET and HEAD commands.

	This serves files from the current directory and any of its
	subdirectories. The MIME type for files is determined by
	calling the .guess_type() method.

	The GET and HEAD requests are identical except that the HEAD
	request omits the actual contents of the file.

	"""

	server_version = "SimpleHTTP/" + __version__

	def do_GET(self):
	"""Serve a GET request."""
	f = self.send_head()
	if f:
	self.copyfile(f, self.wfile)
	f.close()

	def do_HEAD(self):
	"""Serve a HEAD request."""
	f = self.send_head()
	if f:
	f.close()

	def send_head(self):
	"""Common code for GET and HEAD commands.

	This sends the response code and MIME headers.

	Return value is either a file object (which has to be copied
	to the outputfile by the caller unless the command was HEAD,
	and must be closed by the caller under all circumstances), or
	None, in which case the caller has nothing further to do.

	"""
	path = self.translate_path(self.path)
	f = None
	if os.path.isdir(path):
	if not self.path.endswith('/'):
	# redirect browser - doing basically what apache does
	self.send_response(301)
	self.send_header("Location", self.path + "/")
	self.end_headers()
	return None
	for index in "index.html", "index.htm":
	index = os.path.join(path, index)
	if os.path.exists(index):
	path = index
	break
	else:
	return self.list_directory(path)
	ctype = self.guess_type(path)
	try:
	f = open(path, 'rb')
	except IOError:
	self.send_error(404, "File not found")
	return None
	self.send_response(200)
	self.send_header("Content-type", ctype)
	fs = os.fstat(f.fileno())
	self.send_header("Content-Length", str(fs[6]))
	self.send_header("Last-Modified", self.date_time_string(fs.st_mtime))
	self.end_headers()
	return f

	def list_directory(self, path):
	"""Helper to produce a directory listing (absent index.html).

	Return value is either a file object, or None (indicating an
	error). In either case, the headers are sent, making the
	interface the same as for send_head().

	"""
	try:
	list = os.listdir(path)
	except os.error:
	self.send_error(404, "No permission to list directory")
	return None
	list.sort(key=lambda a: a.lower())
	r = []
	displaypath = html.escape(urllib_parse.unquote(self.path))
	enc = sys.getfilesystemencoding()
	title = 'Directory listing for %s' % displaypath
	r.append('<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01//EN" '
	'"http://www.w3.org/TR/html4/strict.dtd">')
	r.append('<html>\n<head>')
	r.append('<meta http-equiv="Content-Type" '
	'content="text/html; charset=%s">' % enc)
	r.append('<title>%s</title>\n</head>' % title)
	r.append('<body>\n<h1>%s</h1>' % title)
	r.append('<hr>\n<ul>')
	for name in list:
	fullname = os.path.join(path, name)
	displayname = linkname = name
	# Append / for directories or @ for symbolic links
	if os.path.isdir(fullname):
	displayname = name + "/"
	linkname = name + "/"
	if os.path.islink(fullname):
	displayname = name + "@"
	# Note: a link to a directory displays with @ and links with /
	r.append('<li><a href="%s">%s</a></li>'
	% (urllib_parse.quote(linkname), html.escape(displayname)))
	# # Use this instead:
	# r.append('<li><a href="%s">%s</a></li>'
	# % (urllib.quote(linkname), cgi.escape(displayname)))
	r.append('</ul>\n<hr>\n</body>\n</html>\n')
	encoded = '\n'.join(r).encode(enc)
	f = io.BytesIO()
	f.write(encoded)
	f.seek(0)
	self.send_response(200)
	self.send_header("Content-type", "text/html; charset=%s" % enc)
	self.send_header("Content-Length", str(len(encoded)))
	self.end_headers()
	return f

	def translate_path(self, path):
	"""Translate a /-separated PATH to the local filename syntax.

	Components that mean special things to the local file system
	(e.g. drive or directory names) are ignored. (XXX They should
	probably be diagnosed.)

	"""
	# abandon query parameters
	path = path.split('?',1)[0]
	path = path.split('#',1)[0]
	path = posixpath.normpath(urllib_parse.unquote(path))
	words = path.split('/')
	words = filter(None, words)
	path = os.getcwd()
	for word in words:
	drive, word = os.path.splitdrive(word)
	head, word = os.path.split(word)
	if word in (os.curdir, os.pardir): continue
	path = os.path.join(path, word)
	return path

	def copyfile(self, source, outputfile):
	"""Copy all data between two file objects.

	The SOURCE argument is a file object open for reading
	(or anything with a read() method) and the DESTINATION
	argument is a file object open for writing (or
	anything with a write() method).

	The only reason for overriding this would be to change
	the block size or perhaps to replace newlines by CRLF
	-- note however that this the default server uses this
	to copy binary data as well.

	"""
	shutil.copyfileobj(source, outputfile)

	def guess_type(self, path):
	"""Guess the type of a file.

	Argument is a PATH (a filename).

	Return value is a string of the form type/subtype,
	usable for a MIME Content-type header.

	The default implementation looks the file's extension
	up in the table self.extensions_map, using application/octet-stream
	as a default; however it would be permissible (if
	slow) to look inside the data to make a better guess.

	"""

	base, ext = posixpath.splitext(path)
	if ext in self.extensions_map:
	return self.extensions_map[ext]
	ext = ext.lower()
	if ext in self.extensions_map:
	return self.extensions_map[ext]
	else:
	return self.extensions_map['']

	if not mimetypes.inited:
	mimetypes.init() # try to read system mime.types
	extensions_map = mimetypes.types_map.copy()
	extensions_map.update({
	'': 'application/octet-stream', # Default
	'.py': 'text/plain',
	'.c': 'text/plain',
	'.h': 'text/plain',
	})


	# Utilities for CGIHTTPRequestHandler

	def _url_collapse_path(path):
	"""
	Given a URL path, remove extra '/'s and '.' path elements and collapse
	any '..' references and returns a colllapsed path.

	Implements something akin to RFC-2396 5.2 step 6 to parse relative paths.
	The utility of this function is limited to is_cgi method and helps
	preventing some security attacks.

	Returns: A tuple of (head, tail) where tail is everything after the final /
	and head is everything before it. Head will always start with a '/' and,
	if it contains anything else, never have a trailing '/'.

	Raises: IndexError if too many '..' occur within the path.

	"""
	# Similar to os.path.split(os.path.normpath(path)) but specific to URL
	# path semantics rather than local operating system semantics.
	path_parts = path.split('/')
	head_parts = []
	for part in path_parts[:-1]:
	if part == '..':
	head_parts.pop() # IndexError if more '..' than prior parts
	elif part and part != '.':
	head_parts.append( part )
	if path_parts:
	tail_part = path_parts.pop()
	if tail_part:
	if tail_part == '..':
	head_parts.pop()
	tail_part = ''
	elif tail_part == '.':
	tail_part = ''
	else:
	tail_part = ''

	splitpath = ('/' + '/'.join(head_parts), tail_part)
	collapsed_path = "/".join(splitpath)

	return collapsed_path



	nobody = None

	def nobody_uid():
	"""Internal routine to get nobody's uid"""
	global nobody
	if nobody:
	return nobody
	try:
	import pwd
	except ImportError:
	return -1
	try:
	nobody = pwd.getpwnam('nobody')[2]
	except KeyError:
	nobody = 1 + max(x[2] for x in pwd.getpwall())
	return nobody


	def executable(path):
	"""Test for executable file."""
	return os.access(path, os.X_OK)


	class CGIHTTPRequestHandler(SimpleHTTPRequestHandler):

	"""Complete HTTP server with GET, HEAD and POST commands.

	GET and HEAD also support running CGI scripts.

	The POST command is only implemented for CGI scripts.

	"""

	# Determine platform specifics
	have_fork = hasattr(os, 'fork')

	# Make rfile unbuffered -- we need to read one line and then pass
	# the rest to a subprocess, so we can't use buffered input.
	rbufsize = 0

	def do_POST(self):
	"""Serve a POST request.

	This is only implemented for CGI scripts.

	"""

	if self.is_cgi():
	self.run_cgi()
	else:
	self.send_error(501, "Can only POST to CGI scripts")

	def send_head(self):
	"""Version of send_head that support CGI scripts"""
	if self.is_cgi():
	return self.run_cgi()
	else:
	return SimpleHTTPRequestHandler.send_head(self)

	def is_cgi(self):
	"""Test whether self.path corresponds to a CGI script.

	Returns True and updates the cgi_info attribute to the tuple
	(dir, rest) if self.path requires running a CGI script.
	Returns False otherwise.

	If any exception is raised, the caller should assume that
	self.path was rejected as invalid and act accordingly.

	The default implementation tests whether the normalized url
	path begins with one of the strings in self.cgi_directories
	(and the next character is a '/' or the end of the string).

	"""
	collapsed_path = _url_collapse_path(self.path)
	dir_sep = collapsed_path.find('/', 1)
	head, tail = collapsed_path[:dir_sep], collapsed_path[dir_sep+1:]
	if head in self.cgi_directories:
	self.cgi_info = head, tail
	return True
	return False


	cgi_directories = ['/cgi-bin', '/htbin']

	def is_executable(self, path):
	"""Test whether argument path is an executable file."""
	return executable(path)

	def is_python(self, path):
	"""Test whether argument path is a Python script."""
	head, tail = os.path.splitext(path)
	return tail.lower() in (".py", ".pyw")

	def run_cgi(self):
	"""Execute a CGI script."""
	path = self.path
	dir, rest = self.cgi_info

	i = path.find('/', len(dir) + 1)
	while i >= 0:
	nextdir = path[:i]
	nextrest = path[i+1:]

	scriptdir = self.translate_path(nextdir)
	if os.path.isdir(scriptdir):
	dir, rest = nextdir, nextrest
	i = path.find('/', len(dir) + 1)
	else:
	break

	# find an explicit query string, if present.
	i = rest.rfind('?')
	if i >= 0:
	rest, query = rest[:i], rest[i+1:]
	else:
	query = ''

	# dissect the part after the directory name into a script name &
	# a possible additional path, to be stored in PATH_INFO.
	i = rest.find('/')
	if i >= 0:
	script, rest = rest[:i], rest[i:]
	else:
	script, rest = rest, ''

	scriptname = dir + '/' + script
	scriptfile = self.translate_path(scriptname)
	if not os.path.exists(scriptfile):
	self.send_error(404, "No such CGI script (%r)" % scriptname)
	return
	if not os.path.isfile(scriptfile):
	self.send_error(403, "CGI script is not a plain file (%r)" %
	scriptname)
	return
	ispy = self.is_python(scriptname)
	if self.have_fork or not ispy:
	if not self.is_executable(scriptfile):
	self.send_error(403, "CGI script is not executable (%r)" %
	scriptname)
	return

	# Reference: http://hoohoo.ncsa.uiuc.edu/cgi/env.html
	# XXX Much of the following could be prepared ahead of time!
	env = copy.deepcopy(os.environ)
	env['SERVER_SOFTWARE'] = self.version_string()
	env['SERVER_NAME'] = self.server.server_name
	env['GATEWAY_INTERFACE'] = 'CGI/1.1'
	env['SERVER_PROTOCOL'] = self.protocol_version
	env['SERVER_PORT'] = str(self.server.server_port)
	env['REQUEST_METHOD'] = self.command
	uqrest = urllib_parse.unquote(rest)
	env['PATH_INFO'] = uqrest
	env['PATH_TRANSLATED'] = self.translate_path(uqrest)
	env['SCRIPT_NAME'] = scriptname
	if query:
	env['QUERY_STRING'] = query
	env['REMOTE_ADDR'] = self.client_address[0]
	authorization = self.headers.get("authorization")
	if authorization:
	authorization = authorization.split()
	if len(authorization) == 2:
	import base64, binascii
	env['AUTH_TYPE'] = authorization[0]
	if authorization[0].lower() == "basic":
	try:
	authorization = authorization[1].encode('ascii')
	if utils.PY3:
	# In Py3.3, was:
	authorization = base64.decodebytes(authorization).\
	decode('ascii')
	else:
	# Backport to Py2.7:
	authorization = base64.decodestring(authorization).\
	decode('ascii')
	except (binascii.Error, UnicodeError):
	pass
	else:
	authorization = authorization.split(':')
	if len(authorization) == 2:
	env['REMOTE_USER'] = authorization[0]
	# XXX REMOTE_IDENT
	if self.headers.get('content-type') is None:
	env['CONTENT_TYPE'] = self.headers.get_content_type()
	else:
	env['CONTENT_TYPE'] = self.headers['content-type']
	length = self.headers.get('content-length')
	if length:
	env['CONTENT_LENGTH'] = length
	referer = self.headers.get('referer')
	if referer:
	env['HTTP_REFERER'] = referer
	accept = []
	for line in self.headers.getallmatchingheaders('accept'):
	if line[:1] in "\t\n\r ":
	accept.append(line.strip())
	else:
	accept = accept + line[7:].split(',')
	env['HTTP_ACCEPT'] = ','.join(accept)
	ua = self.headers.get('user-agent')
	if ua:
	env['HTTP_USER_AGENT'] = ua
	co = filter(None, self.headers.get_all('cookie', []))
	cookie_str = ', '.join(co)
	if cookie_str:
	env['HTTP_COOKIE'] = cookie_str
	# XXX Other HTTP_* headers
	# Since we're setting the env in the parent, provide empty
	# values to override previously set values
	for k in ('QUERY_STRING', 'REMOTE_HOST', 'CONTENT_LENGTH',
	'HTTP_USER_AGENT', 'HTTP_COOKIE', 'HTTP_REFERER'):
	env.setdefault(k, "")

	self.send_response(200, "Script output follows")
	self.flush_headers()

	decoded_query = query.replace('+', ' ')

	if self.have_fork:
	# Unix -- fork as we should
	args = [script]
	if '=' not in decoded_query:
	args.append(decoded_query)
	nobody = nobody_uid()
	self.wfile.flush() # Always flush before forking
	pid = os.fork()
	if pid != 0:
	# Parent
	pid, sts = os.waitpid(pid, 0)
	# throw away additional data [see bug #427345]
	while select.select([self.rfile], [], [], 0)[0]:
	if not self.rfile.read(1):
	break
	if sts:
	self.log_error("CGI script exit status %#x", sts)
	return
	# Child
	try:
	try:
	os.setuid(nobody)
	except os.error:
	pass
	os.dup2(self.rfile.fileno(), 0)
	os.dup2(self.wfile.fileno(), 1)
	os.execve(scriptfile, args, env)
	except:
	self.server.handle_error(self.request, self.client_address)
	os._exit(127)

	else:
	# Non-Unix -- use subprocess
	import subprocess
	cmdline = [scriptfile]
	if self.is_python(scriptfile):
	interp = sys.executable
	if interp.lower().endswith("w.exe"):
	# On Windows, use python.exe, not pythonw.exe
	interp = interp[:-5] + interp[-4:]
	cmdline = [interp, '-u'] + cmdline
	if '=' not in query:
	cmdline.append(query)
	self.log_message("command: %s", subprocess.list2cmdline(cmdline))
	try:
	nbytes = int(length)
	except (TypeError, ValueError):
	nbytes = 0
	p = subprocess.Popen(cmdline,
	stdin=subprocess.PIPE,
	stdout=subprocess.PIPE,
	stderr=subprocess.PIPE,
	env = env
	)
	if self.command.lower() == "post" and nbytes > 0:
	data = self.rfile.read(nbytes)
	else:
	data = None
	# throw away additional data [see bug #427345]
	while select.select([self.rfile._sock], [], [], 0)[0]:
	if not self.rfile._sock.recv(1):
	break
	stdout, stderr = p.communicate(data)
	self.wfile.write(stdout)
	if stderr:
	self.log_error('%s', stderr)
	p.stderr.close()
	p.stdout.close()
	status = p.returncode
	if status:
	self.log_error("CGI script exit status %#x", status)
	else:
	self.log_message("CGI script exited OK")


	def test(HandlerClass = BaseHTTPRequestHandler,
	ServerClass = HTTPServer, protocol="HTTP/1.0", port=8000):
	"""Test the HTTP request handler class.

	This runs an HTTP server on port 8000 (or the first command line
	argument).

	"""
	server_address = ('', port)

	HandlerClass.protocol_version = protocol
	httpd = ServerClass(server_address, HandlerClass)

	sa = httpd.socket.getsockname()
	print("Serving HTTP on", sa[0], "port", sa[1], "...")
	try:
	httpd.serve_forever()
	except KeyboardInterrupt:
	print("\nKeyboard interrupt received, exiting.")
	httpd.server_close()
	sys.exit(0)

	if __name__ == '__main__':
	parser = argparse.ArgumentParser()
	parser.add_argument('--cgi', action='store_true',
	help='Run as CGI Server')
	parser.add_argument('port', action='store',
	default=8000, type=int,
	nargs='?',
	help='Specify alternate port [default: 8000]')
	args = parser.parse_args()
	if args.cgi:
	test(HandlerClass=CGIHTTPRequestHandler, port=args.port)
	else:
	test(HandlerClass=SimpleHTTPRequestHandler, port=args.port)