209 lines
7.1 KiB
Python
209 lines
7.1 KiB
Python
"""
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HTTP server that implements the Python WSGI protocol (PEP 333, rev 1.21).
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Based on wsgiref.simple_server which is part of the standard library since 2.5.
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This is a simple server for use in testing or debugging Django apps. It hasn't
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been reviewed for security issues. DON'T USE IT FOR PRODUCTION USE!
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"""
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import os
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import socket
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import sys
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import traceback
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try:
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from urllib.parse import unquote, urljoin
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except ImportError: # Python 2
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from urllib import unquote
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from urlparse import urljoin
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from django.utils.six.moves import socketserver
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from wsgiref import simple_server
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from wsgiref.util import FileWrapper # for backwards compatibility
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import django
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from django.core.exceptions import ImproperlyConfigured
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from django.core.management.color import color_style
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from django.core.wsgi import get_wsgi_application
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from django.utils.importlib import import_module
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__all__ = ['WSGIServer', 'WSGIRequestHandler']
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def get_internal_wsgi_application():
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"""
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Loads and returns the WSGI application as configured by the user in
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``settings.WSGI_APPLICATION``. With the default ``startproject`` layout,
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this will be the ``application`` object in ``projectname/wsgi.py``.
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This function, and the ``WSGI_APPLICATION`` setting itself, are only useful
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for Django's internal servers (runserver, runfcgi); external WSGI servers
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should just be configured to point to the correct application object
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directly.
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If settings.WSGI_APPLICATION is not set (is ``None``), we just return
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whatever ``django.core.wsgi.get_wsgi_application`` returns.
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"""
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from django.conf import settings
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app_path = getattr(settings, 'WSGI_APPLICATION')
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if app_path is None:
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return get_wsgi_application()
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module_name, attr = app_path.rsplit('.', 1)
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try:
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mod = import_module(module_name)
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except ImportError as e:
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raise ImproperlyConfigured(
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"WSGI application '%s' could not be loaded; "
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"could not import module '%s': %s" % (app_path, module_name, e))
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try:
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app = getattr(mod, attr)
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except AttributeError as e:
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raise ImproperlyConfigured(
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"WSGI application '%s' could not be loaded; "
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"can't find '%s' in module '%s': %s"
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% (app_path, attr, module_name, e))
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return app
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class WSGIServerException(Exception):
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pass
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class ServerHandler(simple_server.ServerHandler, object):
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error_status = "500 INTERNAL SERVER ERROR"
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def write(self, data):
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"""'write()' callable as specified by PEP 333"""
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assert isinstance(data, str), "write() argument must be string"
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if not self.status:
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raise AssertionError("write() before start_response()")
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elif not self.headers_sent:
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# Before the first output, send the stored headers
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self.bytes_sent = len(data) # make sure we know content-length
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self.send_headers()
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else:
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self.bytes_sent += len(data)
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# XXX check Content-Length and truncate if too many bytes written?
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# If data is too large, socket will choke, so write chunks no larger
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# than 32MB at a time.
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length = len(data)
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if length > 33554432:
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offset = 0
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while offset < length:
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chunk_size = min(33554432, length)
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self._write(data[offset:offset+chunk_size])
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self._flush()
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offset += chunk_size
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else:
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self._write(data)
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self._flush()
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def error_output(self, environ, start_response):
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super(ServerHandler, self).error_output(environ, start_response)
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return ['\n'.join(traceback.format_exception(*sys.exc_info()))]
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class WSGIServer(simple_server.WSGIServer, object):
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"""BaseHTTPServer that implements the Python WSGI protocol"""
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def __init__(self, *args, **kwargs):
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if kwargs.pop('ipv6', False):
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self.address_family = socket.AF_INET6
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super(WSGIServer, self).__init__(*args, **kwargs)
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def server_bind(self):
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"""Override server_bind to store the server name."""
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try:
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super(WSGIServer, self).server_bind()
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except Exception as e:
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raise WSGIServerException(e)
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self.setup_environ()
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class WSGIRequestHandler(simple_server.WSGIRequestHandler, object):
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def __init__(self, *args, **kwargs):
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from django.conf import settings
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self.admin_static_prefix = urljoin(settings.STATIC_URL, 'admin/')
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# We set self.path to avoid crashes in log_message() on unsupported
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# requests (like "OPTIONS").
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self.path = ''
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self.style = color_style()
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super(WSGIRequestHandler, self).__init__(*args, **kwargs)
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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['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'] = unquote(path)
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env['QUERY_STRING'] = query
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env['REMOTE_ADDR'] = self.client_address[0]
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env['CONTENT_TYPE'] = self.headers.get('content-type', 'text/plain')
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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 key, value in self.headers.items():
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key = key.replace('-','_').upper()
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value = value.strip()
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if key in env:
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# Skip content length, type, etc.
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continue
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if 'HTTP_' + key in env:
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# Comma-separate multiple headers
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env['HTTP_' + key] += ',' + value
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else:
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env['HTTP_' + key] = value
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return env
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def log_message(self, format, *args):
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# Don't bother logging requests for admin images or the favicon.
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if (self.path.startswith(self.admin_static_prefix)
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or self.path == '/favicon.ico'):
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return
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msg = "[%s] %s\n" % (self.log_date_time_string(), format % args)
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# Utilize terminal colors, if available
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if args[1][0] == '2':
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# Put 2XX first, since it should be the common case
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msg = self.style.HTTP_SUCCESS(msg)
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elif args[1][0] == '1':
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msg = self.style.HTTP_INFO(msg)
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elif args[1] == '304':
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msg = self.style.HTTP_NOT_MODIFIED(msg)
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elif args[1][0] == '3':
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msg = self.style.HTTP_REDIRECT(msg)
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elif args[1] == '404':
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msg = self.style.HTTP_NOT_FOUND(msg)
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elif args[1][0] == '4':
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msg = self.style.HTTP_BAD_REQUEST(msg)
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else:
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# Any 5XX, or any other response
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msg = self.style.HTTP_SERVER_ERROR(msg)
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sys.stderr.write(msg)
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def run(addr, port, wsgi_handler, ipv6=False, threading=False):
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server_address = (addr, port)
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if threading:
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httpd_cls = type('WSGIServer', (socketserver.ThreadingMixIn, WSGIServer), {})
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else:
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httpd_cls = WSGIServer
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httpd = httpd_cls(server_address, WSGIRequestHandler, ipv6=ipv6)
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httpd.set_app(wsgi_handler)
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httpd.serve_forever()
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