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opt/alt/python37/share/doc/alt-python37-mako/examples/wsgi/_[ Not.Writable ]

File://opt/alt/python37/share/doc/alt-python37-mako/examples/wsgi/run_wsgi.py

#!/usr/bin/python

from __future__ import absolute_import
from __future__ import division
from __future__ import print_function
from __future__ import unicode_literals

import cgi, re, os, posixpath, mimetypes
from mako.lookup import TemplateLookup
from mako import exceptions

root = './'
port = 8000

lookup = TemplateLookup(
             directories=[root + 'templates', root + 'htdocs'],
             filesystem_checks=True,
             module_directory='./modules',
             # even better would be to use 'charset' in start_response
             output_encoding='ascii',
             encoding_errors='replace'
         )

def serve(environ, start_response):
    """serves requests using the WSGI callable interface."""
    fieldstorage = cgi.FieldStorage(
            fp = environ['wsgi.input'],
            environ = environ,
            keep_blank_values = True
    )
    d = dict([(k, getfield(fieldstorage[k])) for k in fieldstorage])

    uri = environ.get('PATH_INFO', '/')
    if not uri:
        uri = '/index.html'
    else:
        uri = re.sub(r'^/$', '/index.html', uri)

    if re.match(r'.*\.html$', uri):
        try:
            template = lookup.get_template(uri)
        except exceptions.TopLevelLookupException:
            start_response("404 Not Found", [])
            return [str.encode("Cant find template '%s'" % uri)]

        start_response("200 OK", [('Content-type','text/html')])

        try:
            return [template.render(**d)]
        except:
            return [exceptions.html_error_template().render()]
    else:
        u = re.sub(r'^\/+', '', uri)
        filename = os.path.join(root, u)
        if os.path.isfile(filename):
            start_response("200 OK", [('Content-type',guess_type(uri))])
            return [open(filename, 'rb').read()]
        else:
            start_response("404 Not Found", [])
            return [str.encode("File not found: '%s'" % filename)]
 
def getfield(f):
    """convert values from cgi.Field objects to plain values."""
    if isinstance(f, list):
        return [getfield(x) for x in f]
    else:
        return f.value

extensions_map = mimetypes.types_map.copy()

def guess_type(path):
    """return a mimetype for the given path based on file extension."""
    base, ext = posixpath.splitext(path)
    if ext in extensions_map:
        return extensions_map[ext]
    ext = ext.lower()
    if ext in extensions_map:
        return extensions_map[ext]
    else:
        return 'text/html'
 
if __name__ == '__main__':
    import wsgiref.simple_server
    server = wsgiref.simple_server.make_server('', port, serve)
    print("Server listening on port %d" % port)
    server.serve_forever()

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