""" HTTP server that implements the Python WSGI protocol (PEP 333, rev 1.21). Based on wsgiref.simple_server which is part of the standard library since 2.5. This is a simple server for use in testing or debugging Django apps. It hasn't been reviewed for security issues. DON'T USE IT FOR PRODUCTION USE! """ from __future__ import unicode_literals import os import socket import sys import traceback try: from urllib.parse import urljoin except ImportError: # Python 2 from urlparse import urljoin from django.utils.six.moves import socketserver from wsgiref import simple_server from wsgiref.util import FileWrapper # for backwards compatibility import django from django.core.exceptions import ImproperlyConfigured from django.core.management.color import color_style from django.core.wsgi import get_wsgi_application from django.utils.importlib import import_module __all__ = ['WSGIServer', 'WSGIRequestHandler'] def get_internal_wsgi_application(): """ Loads and returns the WSGI application as configured by the user in ``settings.WSGI_APPLICATION``. With the default ``startproject`` layout, this will be the ``application`` object in ``projectname/wsgi.py``. This function, and the ``WSGI_APPLICATION`` setting itself, are only useful for Django's internal servers (runserver, runfcgi); external WSGI servers should just be configured to point to the correct application object directly. If settings.WSGI_APPLICATION is not set (is ``None``), we just return whatever ``django.core.wsgi.get_wsgi_application`` returns. """ from django.conf import settings app_path = getattr(settings, 'WSGI_APPLICATION') if app_path is None: return get_wsgi_application() module_name, attr = app_path.rsplit('.', 1) try: mod = import_module(module_name) except ImportError as e: raise ImproperlyConfigured( "WSGI application '%s' could not be loaded; " "could not import module '%s': %s" % (app_path, module_name, e)) try: app = getattr(mod, attr) except AttributeError as e: raise ImproperlyConfigured( "WSGI application '%s' could not be loaded; " "can't find '%s' in module '%s': %s" % (app_path, attr, module_name, e)) return app class WSGIServerException(Exception): pass class ServerHandler(simple_server.ServerHandler, object): error_status = str("500 INTERNAL SERVER ERROR") def write(self, data): """'write()' callable as specified by PEP 3333""" assert isinstance(data, bytes), "write() argument must be bytestring" if not self.status: raise AssertionError("write() before start_response()") elif not self.headers_sent: # Before the first output, send the stored headers self.bytes_sent = len(data) # make sure we know content-length self.send_headers() else: self.bytes_sent += len(data) # XXX check Content-Length and truncate if too many bytes written? # If data is too large, socket will choke, so write chunks no larger # than 32MB at a time. length = len(data) if length > 33554432: offset = 0 while offset < length: chunk_size = min(33554432, length) self._write(data[offset:offset+chunk_size]) self._flush() offset += chunk_size else: self._write(data) self._flush() def error_output(self, environ, start_response): super(ServerHandler, self).error_output(environ, start_response) return ['\n'.join(traceback.format_exception(*sys.exc_info()))] # Backport of http://hg.python.org/cpython/rev/d5af1b235dab. See #16241. # This can be removed when support for Python <= 2.7.3 is deprecated. def finish_response(self): try: if not self.result_is_file() or not self.sendfile(): for data in self.result: self.write(data) self.finish_content() finally: self.close() class WSGIServer(simple_server.WSGIServer, object): """BaseHTTPServer that implements the Python WSGI protocol""" def __init__(self, *args, **kwargs): if kwargs.pop('ipv6', False): self.address_family = socket.AF_INET6 super(WSGIServer, self).__init__(*args, **kwargs) def server_bind(self): """Override server_bind to store the server name.""" try: super(WSGIServer, self).server_bind() except Exception as e: raise WSGIServerException(e) self.setup_environ() class WSGIRequestHandler(simple_server.WSGIRequestHandler, object): def __init__(self, *args, **kwargs): from django.conf import settings self.admin_static_prefix = urljoin(settings.STATIC_URL, 'admin/') # We set self.path to avoid crashes in log_message() on unsupported # requests (like "OPTIONS"). self.path = '' self.style = color_style() super(WSGIRequestHandler, self).__init__(*args, **kwargs) def address_string(self): # Short-circuit parent method to not call socket.getfqdn return self.client_address[0] def log_message(self, format, *args): # Don't bother logging requests for admin images or the favicon. if (self.path.startswith(self.admin_static_prefix) or self.path == '/favicon.ico'): return msg = "[%s] %s\n" % (self.log_date_time_string(), format % args) # Utilize terminal colors, if available if args[1][0] == '2': # Put 2XX first, since it should be the common case msg = self.style.HTTP_SUCCESS(msg) elif args[1][0] == '1': msg = self.style.HTTP_INFO(msg) elif args[1] == '304': msg = self.style.HTTP_NOT_MODIFIED(msg) elif args[1][0] == '3': msg = self.style.HTTP_REDIRECT(msg) elif args[1] == '404': msg = self.style.HTTP_NOT_FOUND(msg) elif args[1][0] == '4': msg = self.style.HTTP_BAD_REQUEST(msg) else: # Any 5XX, or any other response msg = self.style.HTTP_SERVER_ERROR(msg) sys.stderr.write(msg) def run(addr, port, wsgi_handler, ipv6=False, threading=False): server_address = (addr, port) if threading: httpd_cls = type(str('WSGIServer'), (socketserver.ThreadingMixIn, WSGIServer), {}) else: httpd_cls = WSGIServer httpd = httpd_cls(server_address, WSGIRequestHandler, ipv6=ipv6) httpd.set_app(wsgi_handler) httpd.serve_forever()