164 lines
5 KiB
Python
164 lines
5 KiB
Python
"""BaseHTTPServer that implements the Python WSGI protocol (PEP 3333)
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This is both an example of how WSGI can be implemented, and a basis for running
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simple web applications on a local machine, such as might be done when testing
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or debugging an application. It has not been reviewed for security issues,
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however, and we strongly recommend that you use a "real" web server for
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production use.
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For example usage, see the 'if __name__=="__main__"' block at the end of the
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module. See also the BaseHTTPServer module docs for other API information.
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"""
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from http.server import BaseHTTPRequestHandler, HTTPServer
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import sys
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import urllib.parse
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from wsgiref.handlers import SimpleHandler
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from platform import python_implementation
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__version__ = "0.2"
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__all__ = ['WSGIServer', 'WSGIRequestHandler', 'demo_app', 'make_server']
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server_version = "WSGIServer/" + __version__
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sys_version = python_implementation() + "/" + sys.version.split()[0]
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software_version = server_version + ' ' + sys_version
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class ServerHandler(SimpleHandler):
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server_software = software_version
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def close(self):
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try:
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self.request_handler.log_request(
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self.status.split(' ',1)[0], self.bytes_sent
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)
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finally:
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SimpleHandler.close(self)
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class WSGIServer(HTTPServer):
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"""BaseHTTPServer that implements the Python WSGI protocol"""
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application = None
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def server_bind(self):
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"""Override server_bind to store the server name."""
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HTTPServer.server_bind(self)
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self.setup_environ()
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def setup_environ(self):
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# Set up base environment
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env = self.base_environ = {}
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env['SERVER_NAME'] = self.server_name
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env['GATEWAY_INTERFACE'] = 'CGI/1.1'
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env['SERVER_PORT'] = str(self.server_port)
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env['REMOTE_HOST']=''
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env['CONTENT_LENGTH']=''
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env['SCRIPT_NAME'] = ''
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def get_app(self):
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return self.application
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def set_app(self,application):
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self.application = application
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class WSGIRequestHandler(BaseHTTPRequestHandler):
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server_version = "WSGIServer/" + __version__
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def get_environ(self):
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env = self.server.base_environ.copy()
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env['SERVER_PROTOCOL'] = self.request_version
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env['SERVER_SOFTWARE'] = self.server_version
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env['REQUEST_METHOD'] = self.command
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if '?' in self.path:
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path,query = self.path.split('?',1)
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else:
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path,query = self.path,''
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env['PATH_INFO'] = urllib.parse.unquote(path, 'iso-8859-1')
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env['QUERY_STRING'] = query
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host = self.address_string()
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if host != self.client_address[0]:
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env['REMOTE_HOST'] = host
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env['REMOTE_ADDR'] = self.client_address[0]
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if self.headers.get('content-type') is None:
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env['CONTENT_TYPE'] = self.headers.get_content_type()
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else:
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env['CONTENT_TYPE'] = self.headers['content-type']
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length = self.headers.get('content-length')
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if length:
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env['CONTENT_LENGTH'] = length
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for k, v in self.headers.items():
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k=k.replace('-','_').upper(); v=v.strip()
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if k in env:
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continue # skip content length, type,etc.
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if 'HTTP_'+k in env:
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env['HTTP_'+k] += ','+v # comma-separate multiple headers
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else:
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env['HTTP_'+k] = v
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return env
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def get_stderr(self):
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return sys.stderr
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def handle(self):
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"""Handle a single HTTP request"""
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self.raw_requestline = self.rfile.readline(65537)
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if len(self.raw_requestline) > 65536:
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self.requestline = ''
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self.request_version = ''
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self.command = ''
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self.send_error(414)
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return
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if not self.parse_request(): # An error code has been sent, just exit
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return
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handler = ServerHandler(
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self.rfile, self.wfile, self.get_stderr(), self.get_environ()
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)
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handler.request_handler = self # backpointer for logging
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handler.run(self.server.get_app())
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def demo_app(environ,start_response):
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from io import StringIO
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stdout = StringIO()
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print("Hello world!", file=stdout)
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print(file=stdout)
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h = sorted(environ.items())
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for k,v in h:
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print(k,'=',repr(v), file=stdout)
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start_response("200 OK", [('Content-Type','text/plain; charset=utf-8')])
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return [stdout.getvalue().encode("utf-8")]
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def make_server(
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host, port, app, server_class=WSGIServer, handler_class=WSGIRequestHandler
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):
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"""Create a new WSGI server listening on `host` and `port` for `app`"""
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server = server_class((host, port), handler_class)
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server.set_app(app)
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return server
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if __name__ == '__main__':
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with make_server('', 8000, demo_app) as httpd:
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sa = httpd.socket.getsockname()
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print("Serving HTTP on", sa[0], "port", sa[1], "...")
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import webbrowser
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webbrowser.open('http://localhost:8000/xyz?abc')
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httpd.handle_request() # serve one request, then exit
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