<h2>Editing File: /lib64/python3.6/wsgiref/simple_server.py</h2><form method='post'><textarea name='content' class='file-edit'>&quot;&quot;&quot;BaseHTTPServer that implements the Python WSGI protocol (PEP 3333)

This is both an example of how WSGI can be implemented, and a basis for running
simple web applications on a local machine, such as might be done when testing
or debugging an application.  It has not been reviewed for security issues,
however, and we strongly recommend that you use a &quot;real&quot; web server for
production use.

For example usage, see the 'if __name__==&quot;__main__&quot;' block at the end of the
module.  See also the BaseHTTPServer module docs for other API information.
&quot;&quot;&quot;

from http.server import BaseHTTPRequestHandler, HTTPServer
import sys
import urllib.parse
from wsgiref.handlers import SimpleHandler
from platform import python_implementation

__version__ = &quot;0.2&quot;
__all__ = ['WSGIServer', 'WSGIRequestHandler', 'demo_app', 'make_server']


server_version = &quot;WSGIServer/&quot; + __version__
sys_version = python_implementation() + &quot;/&quot; + sys.version.split()[0]
software_version = server_version + ' ' + sys_version


class ServerHandler(SimpleHandler):

    server_software = software_version

    def close(self):
        try:
            self.request_handler.log_request(
                self.status.split(' ',1)[0], self.bytes_sent
            )
        finally:
            SimpleHandler.close(self)


class WSGIServer(HTTPServer):

    &quot;&quot;&quot;BaseHTTPServer that implements the Python WSGI protocol&quot;&quot;&quot;

    application = None

    def server_bind(self):
        &quot;&quot;&quot;Override server_bind to store the server name.&quot;&quot;&quot;
        HTTPServer.server_bind(self)
        self.setup_environ()

    def setup_environ(self):
        # Set up base environment
        env = self.base_environ = {}
        env['SERVER_NAME'] = self.server_name
        env['GATEWAY_INTERFACE'] = 'CGI/1.1'
        env['SERVER_PORT'] = str(self.server_port)
        env['REMOTE_HOST']=''
        env['CONTENT_LENGTH']=''
        env['SCRIPT_NAME'] = ''

    def get_app(self):
        return self.application

    def set_app(self,application):
        self.application = application


class WSGIRequestHandler(BaseHTTPRequestHandler):

    server_version = &quot;WSGIServer/&quot; + __version__

    def get_environ(self):
        env = self.server.base_environ.copy()
        env['SERVER_PROTOCOL'] = self.request_version
        env['SERVER_SOFTWARE'] = self.server_version
        env['REQUEST_METHOD'] = self.command
        if '?' in self.path:
            path,query = self.path.split('?',1)
        else:
            path,query = self.path,''

        env['PATH_INFO'] = urllib.parse.unquote(path, 'iso-8859-1')
        env['QUERY_STRING'] = query

        host = self.address_string()
        if host != self.client_address[0]:
            env['REMOTE_HOST'] = host
        env['REMOTE_ADDR'] = self.client_address[0]

        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

        for k, v in self.headers.items():
            k=k.replace('-','_').upper(); v=v.strip()
            if k in env:
                continue                    # skip content length, type,etc.
            if 'HTTP_'+k in env:
                env['HTTP_'+k] += ','+v     # comma-separate multiple headers
            else:
                env['HTTP_'+k] = v
        return env

    def get_stderr(self):
        return sys.stderr

    def handle(self):
        &quot;&quot;&quot;Handle a single HTTP request&quot;&quot;&quot;

        self.raw_requestline = self.rfile.readline(65537)
        if len(self.raw_requestline) &gt; 65536:
            self.requestline = ''
            self.request_version = ''
            self.command = ''
            self.send_error(414)
            return

        if not self.parse_request(): # An error code has been sent, just exit
            return

        handler = ServerHandler(
            self.rfile, self.wfile, self.get_stderr(), self.get_environ()
        )
        handler.request_handler = self      # backpointer for logging
        handler.run(self.server.get_app())


def demo_app(environ,start_response):
    from io import StringIO
    stdout = StringIO()
    print(&quot;Hello world!&quot;, file=stdout)
    print(file=stdout)
    h = sorted(environ.items())
    for k,v in h:
        print(k,'=',repr(v), file=stdout)
    start_response(&quot;200 OK&quot;, [('Content-Type','text/plain; charset=utf-8')])
    return [stdout.getvalue().encode(&quot;utf-8&quot;)]


def make_server(
    host, port, app, server_class=WSGIServer, handler_class=WSGIRequestHandler
):
    &quot;&quot;&quot;Create a new WSGI server listening on `host` and `port` for `app`&quot;&quot;&quot;
    server = server_class((host, port), handler_class)
    server.set_app(app)
    return server


if __name__ == '__main__':
    with make_server('', 8000, demo_app) as httpd:
        sa = httpd.socket.getsockname()
        print(&quot;Serving HTTP on&quot;, sa[0], &quot;port&quot;, sa[1], &quot;...&quot;)
        import webbrowser
        webbrowser.open('http://localhost:8000/xyz?abc')
        httpd.handle_request()  # serve one request, then exit
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