启动python脚本，通过socket编程处理HTTP请求，CPU达到100%？

Question

我正在编写一个通过socket编程处理HTTP请求的脚本。我的Python脚本只读取每个HTTP响应，搜索几个关键字并增加计数器。你知道吗

只有在没有传入消息的情况下，启动脚本才会占用高达90-99%的CPU。我该怎么处理？你知道吗

HOST = '' SOCKET_LIST = [] RECV_BUFFER = 40966 PORT=int(sys.argv[1]) serviceInitiatedEvent=0 deliveredEvent=0 EstablishedEvent=0 ConnectionClearedEvent=0 def chat_server(): server_socket = socket.socket(socket.AF_INET, socket.SOCK_STREAM) server_socket.setsockopt(socket.SOL_SOCKET, socket.SO_REUSEADDR, 1) server_socket.bind((HOST, PORT)) server_socket.listen(10) SOCKET_LIST.append(server_socket) print "Chat server started on port " + str(PORT) try: while 1: ready_to_read,ready_to_write,in_error = select.select(SOCKET_LIST,[],[],0) for sock in ready_to_read: if sock == server_socket: sockfd, addr = server_socket.accept() SOCKET_LIST.append(sockfd) else: try: data = sock.recv(RECV_BUFFER) if data: if re.search('serviceInitiatedEvent></SOAP-ENV',data): global serviceInitiatedEvent serviceInitiatedEvent+=1 if re.search('deliveredEvent></SOAP-ENV',data): global deliveredEvent deliveredEvent+=1 else: if sock in SOCKET_LIST: SOCKET_LIST.remove(sock) except: broadcast(server_socket, sock, "Client (%s, %s) is offline\n" % addr) continue except KeyboardInterrupt: print "service Initiated Event:%s" % (serviceInitiatedEvent) print "delivered Event: %s" % (deliveredEvent) server_socket.close() if __name__ == "__main__": sys.exit(chat_server())

Answer 1

如果您有使用100%的while 1循环的代码，那可能就是罪魁祸首。它叫做busy waiting。你知道吗

^{}函数有timeout参数，指定它应该等待事件多长时间。在代码中，将其设置为0，这样当套接字中没有可用数据时，控件会立即返回，从而导致繁忙的等待循环。你知道吗

根据需要指定更大的超时时间，以便在无事可做时代码不会旋转：

ready_to_read,ready_to_write,in_error = select.select(SOCKET_LIST,[],[], 1)
#                                                                       ^^^ here