############################################################################## # # Zope Public License (ZPL) Version 1.0 # ------------------------------------- # # Copyright (c) Digital Creations. All rights reserved. # # This license has been certified as Open Source(tm). # # Redistribution and use in source and binary forms, with or without # modification, are permitted provided that the following conditions are # met: # # 1. Redistributions in source code must retain the above copyright # notice, this list of conditions, and the following disclaimer. # # 2. Redistributions in binary form must reproduce the above copyright # notice, this list of conditions, and the following disclaimer in # the documentation and/or other materials provided with the # distribution. # # 3. Digital Creations requests that attribution be given to Zope # in any manner possible. Zope includes a "Powered by Zope" # button that is installed by default. While it is not a license # violation to remove this button, it is requested that the # attribution remain. A significant investment has been put # into Zope, and this effort will continue if the Zope community # continues to grow. This is one way to assure that growth. # # 4. All advertising materials and documentation mentioning # features derived from or use of this software must display # the following acknowledgement: # # "This product includes software developed by Digital Creations # for use in the Z Object Publishing Environment # (http://www.zope.org/)." # # In the event that the product being advertised includes an # intact Zope distribution (with copyright and license included) # then this clause is waived. # # 5. Names associated with Zope or Digital Creations must not be used to # endorse or promote products derived from this software without # prior written permission from Digital Creations. # # 6. Modified redistributions of any form whatsoever must retain # the following acknowledgment: # # "This product includes software developed by Digital Creations # for use in the Z Object Publishing Environment # (http://www.zope.org/)." # # Intact (re-)distributions of any official Zope release do not # require an external acknowledgement. # # 7. Modifications are encouraged but must be packaged separately as # patches to official Zope releases. Distributions that do not # clearly separate the patches from the original work must be clearly # labeled as unofficial distributions. Modifications which do not # carry the name Zope may be packaged in any form, as long as they # conform to all of the clauses above. # # # Disclaimer # # THIS SOFTWARE IS PROVIDED BY DIGITAL CREATIONS ``AS IS'' AND ANY # EXPRESSED OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE # IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR # PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL DIGITAL CREATIONS OR ITS # CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, # SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT # LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF # USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND # ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, # OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT # OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF # SUCH DAMAGE. # # # This software consists of contributions made by Digital Creations and # many individuals on behalf of Digital Creations. Specific # attributions are listed in the accompanying credits file. # ############################################################################## """ Medusa HTTP server for Zope changes from Medusa's http_server Request Threads -- Requests are processed by threads from a thread pool. Output Handling -- Output is pushed directly into the producer fifo by the request-handling thread. The HTTP server does not do any post-processing such as chunking. Pipelineable -- This is needed for protocols such as HTTP/1.1 in which mutiple requests come in on the same channel, before responses are sent back. When requests are pipelined, the client doesn't wait for the response before sending another request. The server must ensure that responses are sent back in the same order as requests are received. """ import sys import regex import string import os import types import thread import time from cStringIO import StringIO from PubCore import handle from HTTPResponse import make_response from ZPublisher.HTTPRequest import HTTPRequest from medusa.http_server import http_server, http_channel from medusa import counter, producers, asyncore, max_sockets from medusa.default_handler import split_path, unquote, get_header from medusa.asyncore import compact_traceback, dispatcher from ZServer import CONNECTION_LIMIT, ZOPE_VERSION, ZSERVER_VERSION from zLOG import LOG, register_subsystem, BLATHER, INFO, WARNING, ERROR import DebugLogger register_subsystem('ZServer HTTPServer') CONTENT_LENGTH = regex.compile('Content-Length: \([0-9]+\)',regex.casefold) CONNECTION = regex.compile ('Connection: \(.*\)', regex.casefold) # maps request some headers to environment variables. # (those that don't start with 'HTTP_') header2env={'content-length' : 'CONTENT_LENGTH', 'content-type' : 'CONTENT_TYPE', 'connection' : 'CONNECTION_TYPE', } class zhttp_collector: def __init__(self, handler, request, size): self.handler = handler self.request = request if size > 524288: # write large upload data to a file from tempfile import TemporaryFile self.data = TemporaryFile('w+b') else: self.data = StringIO() request.channel.set_terminator(size) request.collector=self # put and post collection methods # def collect_incoming_data (self, data): self.data.write(data) def found_terminator(self): # reset collector self.request.channel.set_terminator('\r\n\r\n') self.request.collector=None # finish request self.data.seek(0) r=self.request d=self.data del self.request del self.data self.handler.continue_request(d,r) class zhttp_handler: "A medusa style handler for zhttp_server" def __init__ (self, module, uri_base=None, env=None): """Creates a zope_handler module -- string, the name of the module to publish uri_base -- string, the base uri of the published module defaults to '/' if not given. env -- dictionary, environment variables to be overridden. Replaces standard variables with supplied ones. """ self.module_name=module self.env_override=env or {} self.hits = counter.counter() # if uri_base is unspecified, assume it # starts with the published module name # if uri_base is None: uri_base='/%s' % module elif uri_base == '': uri_base='/' else: if uri_base[0] != '/': uri_base='/'+uri_base if uri_base[-1] == '/': uri_base=uri_base[:-1] self.uri_base=uri_base uri_regex='%s.*' % self.uri_base self.uri_regex = regex.compile(uri_regex) def match(self, request): uri = request.uri if self.uri_regex.match(uri) == len(uri): return 1 else: return 0 def handle_request(self,request): self.hits.increment() DebugLogger.log('B', id(request), '%s %s' % (string.upper(request.command), request.uri)) size=get_header(CONTENT_LENGTH, request.header) if size and size != '0': size=string.atoi(size) zhttp_collector(self, request, size) else: sin=StringIO() self.continue_request(sin,request) def get_environment(self, request, # These are strictly performance hackery... split=string.split, strip=string.strip, join =string.join, upper=string.upper, lower=string.lower, h2ehas=header2env.has_key, h2eget=header2env.get, workdir=os.getcwd(), ospath=os.path, ): [path, params, query, fragment] = split_path(request.uri) while path and path[0] == '/': path = path[1:] if '%' in path: path = unquote(path) if query: # ZPublisher doesn't want the leading '?' query = query[1:] server=request.channel.server env = {} env['REQUEST_METHOD']=upper(request.command) env['SERVER_PORT']=str(server.port) env['SERVER_NAME']=server.server_name env['SERVER_SOFTWARE']=server.SERVER_IDENT env['SERVER_PROTOCOL']=request.version env['channel.creation_time']=request.channel.creation_time if self.uri_base=='/': env['SCRIPT_NAME']='' env['PATH_INFO']='/' + path else: env['SCRIPT_NAME'] = self.uri_base try: path_info=split(path,self.uri_base[1:],1)[1] except: path_info='' env['PATH_INFO']=path_info env['PATH_TRANSLATED']=ospath.normpath(ospath.join( workdir, env['PATH_INFO'])) if query: env['QUERY_STRING'] = query env['GATEWAY_INTERFACE']='CGI/1.1' env['REMOTE_ADDR']=request.channel.addr[0] # If we're using a resolving logger, try to get the # remote host from the resolver's cache. if hasattr(server.logger, 'resolver'): dns_cache=server.logger.resolver.cache if dns_cache.has_key(env['REMOTE_ADDR']): remote_host=dns_cache[env['REMOTE_ADDR']][2] if remote_host is not None: env['REMOTE_HOST']=remote_host env_has=env.has_key for header in request.header: key,value=split(header,":",1) key=lower(key) value=strip(value) if h2ehas(key) and value: env[h2eget(key)]=value else: key='HTTP_%s' % upper(join(split(key, "-"), "_")) if value and not env_has(key): env[key]=value env.update(self.env_override) return env def continue_request(self, sin, request): "continue handling request now that we have the stdin" s=get_header(CONTENT_LENGTH, request.header) if s: s=string.atoi(s) else: s=0 DebugLogger.log('I', id(request), s) env=self.get_environment(request) zresponse=make_response(request,env) zrequest=HTTPRequest(sin, env, zresponse) request.channel.current_request=None request.channel.queue.append((self.module_name, zrequest, zresponse)) request.channel.work() def status(self): return producers.simple_producer("""
  • Zope Handler """ %(self.module_name, self.hits) ) class zhttp_channel(http_channel): "http channel" closed=0 zombie_timeout=100*60 # 100 minutes def __init__(self, server, conn, addr): http_channel.__init__(self, server, conn, addr) self.queue=[] self.working=0 def push(self, producer, send=1): # this is thread-safe when send is false # note, that strings are not wrapped in # producers by default if self.closed: return self.producer_fifo.push(producer) if send: self.initiate_send() push_with_producer=push def work(self): "try to handle a request" if not self.working: if self.queue: self.working=1 try: module_name, request, response=self.queue.pop(0) except: return handle(module_name, request, response) def close(self): self.closed=1 while self.queue: self.queue.pop() if self.current_request is not None: self.current_request.channel=None # break circ refs self.current_request=None while self.producer_fifo: p=self.producer_fifo.first() if p is not None and type(p) != types.StringType: p.more() # free up resources held by producer self.producer_fifo.pop() dispatcher.close(self) def done(self): "Called when a publishing request is finished" self.working=0 self.work() def kill_zombies(self): now = int (time.time()) for channel in asyncore.socket_map.values(): if channel.__class__ == self.__class__: if (now - channel.creation_time) > channel.zombie_timeout: channel.close() class zhttp_server(http_server): "http server" SERVER_IDENT='Zope/%s ZServer/%s' % (ZOPE_VERSION,ZSERVER_VERSION) channel_class = zhttp_channel def readable(self): return self.accepting and \ len(asyncore.socket_map) < CONNECTION_LIMIT def listen(self, num): # override asyncore limits for nt's listen queue size self.accepting = 1 return self.socket.listen (num)