googlecode ：https://code.google.com/archive/p/python-proxy/source/default/source# -*- coding: cp1252 -*-# <PythonProxy.py>##Copyright (c) <2009> <F醔io Domingues - fnds3000 in gmail.com>##Permission is hereby granted, free of charge, to any person#obtaining a copy of this software and associated documentation#files (the "Software"), to deal in the Software without#restriction, including without limitation the rights to use,#copy, modify, merge, publish, distribute, sublicense, and/or sell#copies of the Software, and to permit persons to whom the#Software is furnished to do so, subject to the following#conditions:##The above copyright notice and this permission notice shall be#included in all copies or substantial portions of the Software.##THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,#EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES#OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND#NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT#HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY,#WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING#FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR#OTHER DEALINGS IN THE SOFTWARE."""Copyright (c) <2009> <F醔io Domingues - fnds3000 in gmail.com> <MIT Licence>                  **************************************                 *** Python Proxy - A Fast HTTP proxy ***                  **************************************Neste momento este proxy ?um Elie Proxy.Suporta os m閠odos HTTP: - OPTIONS; - GET; - HEAD; - POST; - PUT; - DELETE; - TRACE; - CONENCT.Suporta: - Conex鮡s dos cliente em IPv4 ou IPv6; - Conex鮡s ao alvo em IPv4 e IPv6; - Conex鮡s todo o tipo de transmiss鉶 de dados TCP (CONNECT tunneling),     p.e. liga珲es SSL, como ?o caso do HTTPS.A fazer: - Verificar se o input vindo do cliente est?correcto;   - Enviar os devidos HTTP erros se n鉶, ou simplesmente quebrar a liga玢o; - Criar um gestor de erros; - Criar ficheiro log de erros; - Colocar excep珲es nos s韙ios onde ?previs韛el a ocorr阯cia de erros,     p.e.sockets e ficheiros; - Rever tudo e melhorar a estrutura do programar e colocar nomes adequados nas     vari醰eis e m閠odos; - Comentar o programa decentemente; - Doc Strings.Funcionalidades futuras: - Adiconar a funcionalidade de proxy an髇imo e transparente; - Suportar FTP?.(!) Aten玢o o que se segue s?tem efeito em conex鮡s n鉶 CONNECT, para estas o proxy ?sempre Elite.Qual a diferen鏰 entre um proxy Elite, An髇imo e Transparente? - Um proxy elite ?totalmente an髇imo, o servidor que o recebe n鉶 consegue ter     conhecimento da exist阯cia do proxy e n鉶 recebe o endere鏾 IP do cliente; - Quando ?usado um proxy an髇imo o servidor sabe que o cliente est?a usar um     proxy mas n鉶 sabe o endere鏾 IP do cliente;     ?enviado o cabe鏰lho HTTP "Proxy-agent". - Um proxy transparente fornece ao servidor o IP do cliente e um informa玢o que     se est?a usar um proxy.     S鉶 enviados os cabe鏰lhos HTTP "Proxy-agent" e "HTTP_X_FORWARDED_FOR"."""import socket, thread, select__version__ = ‘0.1.0 Draft 1‘BUFLEN = 8192VERSION = ‘Python Proxy/‘+__version__HTTPVER = ‘HTTP/1.1‘class ConnectionHandler:    def __init__(self, connection, address, timeout):        self.client = connection        self.client_buffer = ‘‘        self.timeout = timeout        self.method, self.path, self.protocol = self.get_base_header()        if self.method==‘CONNECT‘:            self.method_CONNECT()        elif self.method in (‘OPTIONS‘, ‘GET‘, ‘HEAD‘, ‘POST‘, ‘PUT‘,                             ‘DELETE‘, ‘TRACE‘):            self.method_others()        self.client.close()        self.target.close()    def get_base_header(self):        while 1:            self.client_buffer += self.client.recv(BUFLEN)            end = self.client_buffer.find(‘\n‘)            if end!=-1:                break        print ‘%s‘%self.client_buffer[:end]#debug        data = http://www.mamicode.com/(self.client_buffer[:end+1]).split()        self.client_buffer = self.client_buffer[end+1:]        return data    def method_CONNECT(self):        self._connect_target(self.path)        self.client.send(HTTPVER+‘ 200 Connection established\n‘+                         ‘Proxy-agent: %s\n\n‘%VERSION)        self.client_buffer = ‘‘        self._read_write()            def method_others(self):        self.path = self.path[7:]        i = self.path.find(‘/‘)        host = self.path[:i]                path = self.path[i:]        self._connect_target(host)        self.target.send(‘%s %s %s\n‘%(self.method, path, self.protocol)+                         self.client_buffer)        self.client_buffer = ‘‘        self._read_write()    def _connect_target(self, host):        i = host.find(‘:‘)        if i!=-1:            port = int(host[i+1:])            host = host[:i]        else:            port = 80        (soc_family, _, _, _, address) = socket.getaddrinfo(host, port)[0]        self.target = socket.socket(soc_family)        self.target.connect(address)    def _read_write(self):        time_out_max = self.timeout/3        socs = [self.client, self.target]        count = 0        while 1:            count += 1            (recv, _, error) = select.select(socs, [], socs, 3)            if error:                break            if recv:                for in_ in recv:                    data = in_.recv(BUFLEN)                    if in_ is self.client:                        out = self.target                    else:                        out = self.client                    if data:                        out.send(data)                        count = 0            if count == time_out_max:                breakdef start_server(host=‘‘, port=8080, IPv6=False, timeout=60,                  handler=ConnectionHandler):    if IPv6==True:        soc_type=socket.AF_INET6    else:        soc_type=socket.AF_INET    soc = socket.socket(soc_type)    soc.bind((host, port))    print "Serving on %s:%d."%(host, port)#debug    soc.listen(0)    while 1:        thread.start_new_thread(handler, soc.accept()+(timeout,))if __name__ == ‘__main__‘:    start_server()