python套接字文件读取超时？

Question

我使用 python 套接字作为文件来与另一个进程通信:

def connect(self):
    try:
        self.sock = socket.socket( socket.AF_INET, socket.SOCK_STREAM)
        self.sock.connect( (self.target, self.port) )
        self.fobj = self.sock.makefile()

通常我会通过套接字编写命令并期望在一定时间内得到答复。所以我的问题是:有没有办法在从套接字文件对象读取一行时实现超时？

谢谢

Answer 1

取自 Python's documentation about socket.makefile() :

socket.makefile([mode[, bufsize]])

Return a file object associated with the socket. (File objects are described in File Objects.) The file object references a dup()ped version of the socket file descriptor, so the file object and socket object may be closed or garbage-collected independently. The socket must be in blocking mode (it can not have a timeout). The optional mode and bufsize arguments are interpreted the same way as by the built-in file() function.

因此，套接字文件上不能有超时，如果需要超时，则必须使用常规套接字。