python使用socket远程连接错误处理方法

import socket, syshost = sys.argv[1]textport = sys.argv[2]filename = sys.argv[3]try:  s = socket.socket(socket.AF_INET, socket.SOCK_STREAM)except socket.error, e:  print "Strange error creating socket: %s" % e  sys.exit(1)try:  port = int(textport)except ValueError:  print "Couldn't find your port: %s" % e  sys.exit(1)try:  s.connect((host, port))except socket.gaierror, e:  print "Address-related error connecting to server: %s" % e  sys.exit(1)except socket.error, e:  print "Connection error: %s" % e  sys.exit(1)try:  s.sendall("GET %s HTTP/1.0/r/n/r/n" % filename)except socket.error, e:  print "Error sending data: %s" % e  sys.exit(1)while 1:  try:    buf = s.recv(2048)  except socket.error, e:    print "Error receiving data: %s" % e    sys.exit(1)  if not len(buf):    break  sys.stdout.write(buf)