mirror of
https://github.com/AdaCore/ace.git
synced 2026-02-12 13:03:02 -08:00
243 lines
8.3 KiB
Python
Executable File
243 lines
8.3 KiB
Python
Executable File
#!/usr/bin/env python
|
|
"""static - A stupidly simple WSGI way to serve static (or mixed) content.
|
|
|
|
(See the docstrings of the various functions and classes.)
|
|
|
|
Copyright (C) 2006-2009 Luke Arno - http://lukearno.com/
|
|
|
|
This library is free software; you can redistribute it and/or
|
|
modify it under the terms of the GNU Lesser General Public
|
|
License as published by the Free Software Foundation; either
|
|
version 2.1 of the License, or (at your option) any later version.
|
|
|
|
This library is distributed in the hope that it will be useful,
|
|
but WITHOUT ANY WARRANTY; without even the implied warranty of
|
|
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
|
|
Lesser General Public License for more details.
|
|
|
|
You should have received a copy of the GNU Lesser General Public
|
|
License along with this library; if not, write to:
|
|
|
|
The Free Software Foundation, Inc.,
|
|
51 Franklin Street, Fifth Floor,
|
|
Boston, MA 02110-1301, USA.
|
|
|
|
Luke Arno can be found at http://lukearno.com/
|
|
|
|
"""
|
|
|
|
import mimetypes
|
|
import rfc822
|
|
import time
|
|
import string
|
|
import sys
|
|
from os import path, stat, getcwd
|
|
from wsgiref import util
|
|
from wsgiref.headers import Headers
|
|
from wsgiref.simple_server import make_server
|
|
from optparse import OptionParser
|
|
|
|
try: from pkg_resources import resource_filename, Requirement
|
|
except: pass
|
|
|
|
try: import kid
|
|
except: pass
|
|
|
|
|
|
class MagicError(Exception): pass
|
|
|
|
|
|
class StatusApp:
|
|
"""Used by WSGI apps to return some HTTP status."""
|
|
|
|
def __init__(self, status, message=None):
|
|
self.status = status
|
|
if message is None:
|
|
self.message = status
|
|
else:
|
|
self.message = message
|
|
|
|
def __call__(self, environ, start_response, headers=[]):
|
|
if self.message:
|
|
Headers(headers).add_header('Content-type', 'text/plain')
|
|
start_response(self.status, headers)
|
|
if environ['REQUEST_METHOD'] == 'HEAD':
|
|
return [""]
|
|
else:
|
|
return [self.message]
|
|
|
|
|
|
class Cling(object):
|
|
"""A stupidly simple way to serve static content via WSGI.
|
|
|
|
Serve the file of the same path as PATH_INFO in self.datadir.
|
|
|
|
Look up the Content-type in self.content_types by extension
|
|
or use 'text/plain' if the extension is not found.
|
|
|
|
Serve up the contents of the file or delegate to self.not_found.
|
|
"""
|
|
|
|
block_size = 16 * 4096
|
|
index_file = 'index.html'
|
|
not_found = StatusApp('404 Not Found')
|
|
not_modified = StatusApp('304 Not Modified', "")
|
|
moved_permanently = StatusApp('301 Moved Permanently')
|
|
method_not_allowed = StatusApp('405 Method Not Allowed')
|
|
|
|
def __init__(self, root, **kw):
|
|
"""Just set the root and any other attribs passes via **kw."""
|
|
self.root = root
|
|
for k, v in kw.iteritems():
|
|
setattr(self, k, v)
|
|
|
|
def __call__(self, environ, start_response):
|
|
"""Respond to a request when called in the usual WSGI way."""
|
|
if environ['REQUEST_METHOD'] not in ('GET', 'HEAD'):
|
|
headers = [('Allow', 'GET, HEAD')]
|
|
return self.method_not_allowed(environ, start_response, headers)
|
|
path_info = environ.get('PATH_INFO', '')
|
|
full_path = self._full_path(path_info)
|
|
if not self._is_under_root(full_path):
|
|
return self.not_found(environ, start_response)
|
|
if path.isdir(full_path):
|
|
if full_path[-1] <> '/' or full_path == self.root:
|
|
location = util.request_uri(environ, include_query=False) + '/'
|
|
if environ.get('QUERY_STRING'):
|
|
location += '?' + environ.get('QUERY_STRING')
|
|
headers = [('Location', location)]
|
|
return self.moved_permanently(environ, start_response, headers)
|
|
else:
|
|
full_path = self._full_path(path_info + self.index_file)
|
|
content_type = self._guess_type(full_path)
|
|
try:
|
|
etag, last_modified = self._conditions(full_path, environ)
|
|
headers = [('Date', rfc822.formatdate(time.time())),
|
|
('Last-Modified', last_modified),
|
|
('ETag', etag)]
|
|
if_modified = environ.get('HTTP_IF_MODIFIED_SINCE')
|
|
if if_modified and (rfc822.parsedate(if_modified)
|
|
>= rfc822.parsedate(last_modified)):
|
|
return self.not_modified(environ, start_response, headers)
|
|
if_none = environ.get('HTTP_IF_NONE_MATCH')
|
|
if if_none and (if_none == '*' or etag in if_none):
|
|
return self.not_modified(environ, start_response, headers)
|
|
file_like = self._file_like(full_path)
|
|
headers.append(('Content-Type', content_type))
|
|
start_response("200 OK", headers)
|
|
if environ['REQUEST_METHOD'] == 'GET':
|
|
return self._body(full_path, environ, file_like)
|
|
else:
|
|
return ['']
|
|
except (IOError, OSError), e:
|
|
print e
|
|
return self.not_found(environ, start_response)
|
|
|
|
def _full_path(self, path_info):
|
|
"""Return the full path from which to read."""
|
|
return self.root + path_info
|
|
|
|
def _is_under_root(self, full_path):
|
|
"""Guard against arbitrary file retrieval."""
|
|
if (path.abspath(full_path) + path.sep)\
|
|
.startswith(path.abspath(self.root) + path.sep):
|
|
return True
|
|
else:
|
|
return False
|
|
|
|
def _guess_type(self, full_path):
|
|
"""Guess the mime type using the mimetypes module."""
|
|
return mimetypes.guess_type(full_path)[0] or 'text/plain'
|
|
|
|
def _conditions(self, full_path, environ):
|
|
"""Return a tuple of etag, last_modified by mtime from stat."""
|
|
mtime = stat(full_path).st_mtime
|
|
return str(mtime), rfc822.formatdate(mtime)
|
|
|
|
def _file_like(self, full_path):
|
|
"""Return the appropriate file object."""
|
|
return open(full_path, 'rb')
|
|
|
|
def _body(self, full_path, environ, file_like):
|
|
"""Return an iterator over the body of the response."""
|
|
way_to_send = environ.get('wsgi.file_wrapper', iter_and_close)
|
|
return way_to_send(file_like, self.block_size)
|
|
|
|
|
|
def iter_and_close(file_like, block_size):
|
|
"""Yield file contents by block then close the file."""
|
|
while 1:
|
|
try:
|
|
block = file_like.read(block_size)
|
|
if block: yield block
|
|
else: raise StopIteration
|
|
except StopIteration, si:
|
|
file_like.close()
|
|
return
|
|
|
|
|
|
def cling_wrap(package_name, dir_name, **kw):
|
|
"""Return a Cling that serves from the given package and dir_name.
|
|
|
|
This uses pkg_resources.resource_filename which is not the
|
|
recommended way, since it extracts the files.
|
|
|
|
I think this works fine unless you have some _very_ serious
|
|
requirements for static content, in which case you probably
|
|
shouldn't be serving it through a WSGI app, IMHO. YMMV.
|
|
"""
|
|
resource = Requirement.parse(package_name)
|
|
return Cling(resource_filename(resource, dir_name), **kw)
|
|
|
|
|
|
def command():
|
|
parser = OptionParser(usage="%prog DIR [HOST][:][PORT]",
|
|
version="static 0.3.6")
|
|
options, args = parser.parse_args()
|
|
if len(args) in (1, 2):
|
|
if len(args) == 2:
|
|
parts = args[1].split(":")
|
|
if len(parts) == 1:
|
|
host = parts[0]
|
|
port = None
|
|
elif len(parts) == 2:
|
|
host, port = parts
|
|
else:
|
|
sys.exit("Invalid host:port specification.")
|
|
elif len(args) == 1:
|
|
host, port = None, None
|
|
if not host:
|
|
host = '0.0.0.0'
|
|
if not port:
|
|
port = 9999
|
|
try:
|
|
port = int(port)
|
|
except:
|
|
sys.exit("Invalid host:port specification.")
|
|
app = Cling(args[0])
|
|
try:
|
|
make_server(host, port, app).serve_forever()
|
|
except KeyboardInterrupt, ki:
|
|
print "Cio, baby!"
|
|
except:
|
|
sys.exit("Problem initializing server.")
|
|
else:
|
|
parser.print_help(sys.stderr)
|
|
sys.exit(1)
|
|
|
|
|
|
def test():
|
|
from wsgiref.validate import validator
|
|
app = Cling(getcwd())
|
|
try:
|
|
print "Serving " + getcwd() + " to http://localhost:9999"
|
|
make_server('0.0.0.0', 9999, validator(app)).serve_forever()
|
|
except KeyboardInterrupt, ki:
|
|
print ""
|
|
print "Ciao, baby!"
|
|
|
|
|
|
if __name__ == '__main__':
|
|
test()
|
|
|