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"""Simple HTTP Server.

This module builds on BaseHTTPServer by implementing the standard GET

and HEAD requests in a fairly straightforward manner.

"""

__version__ = "0.6"

__all__ = ["SimpleHTTPRequestHandler"]

import os

import posixpath

import BaseHTTPServer

import urllib

import cgi

import shutil

import mimetypes

from StringIO import StringIO

class SimpleHTTPRequestHandler(BaseHTTPServer.BaseHTTPRequestHandler):

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

This serves files from the current directory and any of its

subdirectories. It assumes that all files are plain text files

unless they have the extension ".html" in which case it assumes

they are HTML files.

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):

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)

if ctype.startswith('text/'):

mode = 'r'

else:

mode = 'rb'

try:

f = open(path, mode)

except IOError:

self.send_error(404, "File not found")

return None

self.send_response(200)

self.send_header("Content-type", ctype)

self.send_header("Content-Length", str(os.fstat(f.fileno())[6]))

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(lambda a, b: cmp(a.lower(), b.lower()))

f = StringIO()

f.write("<title>Directory listing for %s</title>\n" % self.path)

f.write("<h2>Directory listing for %s</h2>\n" % self.path)

f.write("<hr>\n<ul>\n")

for name in list:

fullname = os.path.join(path, name)

displayname = linkname = name = cgi.escape(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 /

f.write('<li><a href="%s">%s</a>\n' % (linkname, displayname))

f.write("</ul>\n<hr>\n")

length = f.tell()

f.seek(0)

self.send_response(200)

self.send_header("Content-type", "text/html")

self.send_header("Content-Length", str(length))

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.)

"""

path = posixpath.normpath(urllib.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 text/plain

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['']

extensions_map = mimetypes.types_map.copy()

extensions_map.update({

'': 'application/octet-stream', # Default

'.py': 'text/plain',

'.c': 'text/plain',

'.h': 'text/plain',

})

def test(HandlerClass = SimpleHTTPRequestHandler,

ServerClass = BaseHTTPServer.HTTPServer):

BaseHTTPServer.test(HandlerClass, ServerClass)

if __name__ == '__main__':

test()

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