""" 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! """ import os import socket import sys import traceback import urllib 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.utils._os import safe_join from django.views import static from django.contrib.staticfiles import handlers __all__ = ['WSGIServer', 'WSGIRequestHandler'] class WSGIServerException(Exception): pass class ServerHandler(simple_server.ServerHandler, object): error_status = "500 INTERNAL SERVER ERROR" def write(self, data): """'write()' callable as specified by PEP 333""" assert isinstance(data, str), "write() argument must be string" 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()))] 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, 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_media_prefix = settings.ADMIN_MEDIA_PREFIX # 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 get_environ(self): env = self.server.base_environ.copy() env['SERVER_PROTOCOL'] = self.request_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.unquote(path) env['QUERY_STRING'] = query env['REMOTE_ADDR'] = self.client_address[0] if self.headers.typeheader is None: env['CONTENT_TYPE'] = self.headers.type else: env['CONTENT_TYPE'] = self.headers.typeheader length = self.headers.getheader('content-length') if length: env['CONTENT_LENGTH'] = length for h in self.headers.headers: k,v = h.split(':',1) 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 log_message(self, format, *args): # Don't bother logging requests for admin images or the favicon. if (self.path.startswith(self.admin_media_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) class AdminMediaHandler(handlers.StaticFilesHandler): """ WSGI middleware that intercepts calls to the admin media directory, as defined by the ADMIN_MEDIA_PREFIX setting, and serves those images. Use this ONLY LOCALLY, for development! This hasn't been tested for security and is not super efficient. This is pending for deprecation since 1.3. """ def get_base_dir(self): return os.path.join(django.__path__[0], 'contrib', 'admin', 'media') def get_base_url(self): from django.conf import settings if not settings.ADMIN_MEDIA_PREFIX: raise ImproperlyConfigured( "The ADMIN_MEDIA_PREFIX setting can't be empty " "when using the AdminMediaHandler, e.g. with runserver.") return settings.ADMIN_MEDIA_PREFIX def file_path(self, url): """ Returns the path to the media file on disk for the given URL. The passed URL is assumed to begin with ``self.base_url``. If the resulting file path is outside the media directory, then a ValueError is raised. """ relative_url = url[len(self.base_url[2]):] relative_path = urllib.url2pathname(relative_url) return safe_join(self.base_dir, relative_path) def serve(self, request): document_root, path = os.path.split(self.file_path(request.path)) return static.serve(request, path, document_root=document_root) def _should_handle(self, path): """ Checks if the path should be handled. Ignores the path if: * the host is provided as part of the base_url * the request's path isn't under the base path """ return path.startswith(self.base_url[2]) and not self.base_url[1] def run(addr, port, wsgi_handler, ipv6=False): server_address = (addr, port) httpd = WSGIServer(server_address, WSGIRequestHandler, ipv6=ipv6) httpd.set_app(wsgi_handler) httpd.serve_forever()