ftplib.py 文件源码

def retrlines(self, cmd, callback = None):
            if callback is None: callback = print_line
            resp = self.sendcmd('TYPE A')
            conn = self.transfercmd(cmd)
            fp = conn.makefile('rb')
            try:
                while 1:
                    line = fp.readline()
                    if self.debugging > 2: print '*retr*', repr(line)
                    if not line:
                        break
                    if line[-2:] == CRLF:
                        line = line[:-2]
                    elif line[-1:] == '\n':
                        line = line[:-1]
                    callback(line)
                # shutdown ssl layer
                if isinstance(conn, ssl.SSLSocket):
                    conn.unwrap()
            finally:
                fp.close()
                conn.close()
            return self.voidresp()