# -*- coding: utf-8 -*-
import __main__
import os
import mimetypes
import stat
[docs]class StaticFileMiddleware(object):
"""
A WSGI compatibile Middleware class that allows content to be retrieved
from the directory that the __main__ is called from.
Example:
.. code-block:: python
def app(environ, start_response):
start_response('200 OK', [('Content-Type', 'text/plain')])
return [b'Hello World!']
my_app = StaticFileMiddleware(app)
"""
app = None
initial_dir = None
script_path = None
[docs] def __init__(self, app, initial_dir=None):
self.script_path = os.path.abspath(__main__.__file__)
self.initial_dir = initial_dir or os.getcwd()
self.app = app
def __call__(self, environ, start_response):
path = os.path.join(self.initial_dir, environ['PATH_INFO'][1:])
run_app = True
actual_path = os.path.join(path)
exists = os.path.exists(actual_path)
if exists and not (exists and stat.S_ISDIR(os.stat(actual_path).st_mode)):
run_app = False
if run_app:
return self.app(environ, start_response)
else:
file_stat = os.stat(actual_path)
return self.serve_static(path,
file_stat,
environ,
start_response)
def serve_static(self, path, file_stat, environ, start_response):
if stat.S_ISREG(file_stat.st_mode):
mime = mimetypes.guess_type(path)[0]
start_response('200 OK', [
('Content-Type', '{0}; charset=utf-8'.format(mime)),
('Content-Length', str(os.path.getsize(path)))
])
with open(path, 'rb') as file:
contents = file.read()
return [contents]