我正在尝试使用Python的telnetlib模块与设备通信。我似乎能够建立连接并将我的查询传递给设备,但输出并不是我所期望的。
这是我的简化代码:
import telnetlib
import time
HOST = "10.10.10.71"
tn = telnetlib.Telnet(HOST, port=55555, timeout=60)
time.sleep(5) # Give the processor time to connect
tn.write(b'v' + b'\r\n') # Get the processor version, using 'v'
print(tn.read_eager().decode('utf-8'))
tn.close() # Close the connection
执行此代码后,所有终端显示为:mpa:? - 不是我期待的处理器信息。
当我使用Telnet客户端时,在建立连接后,我得到一个 mpa:?提示符,表示设备已准备好接受我的命令。然后我输入'v',它应该以这种格式产生输出:
mpa:? v
FIRMWARE CONFIGURATION:
Processor Firmware Type
Build Number
Copyright Info
HARDWARE CONFIGURATION:
Line 1 - xxxx
Line 2 - xxxx
Line 3 - xxxx
...
mpa:?
查询完成后,会显示 mpa:?提示符,为下一个命令做好准备。
我代替print(tn.read_eager().decode('utf-8'))
尝试了print(tn.read_all().decode('utf-8'))
,但这次超时时出现以下错误消息:
Traceback (most recent call last):
File "C:/Python/Telnet_logger_1.py", line 14, in <module>
print(tn.read_all().decode('utf-8'))
File "C:\Python34\lib\telnetlib.py", line 335, in read_all
self.fill_rawq()
File "C:\Python34\lib\telnetlib.py", line 526, in fill_rawq
buf = self.sock.recv(50)
socket.timeout: timed out
有人能指出我正确的方向,还是让我知道我做错了什么?
非常感谢!!
答案 0 :(得分:2)
我已经通过添加while循环来解决问题,在读取新行和回车符后打印每一行:
import telnetlib
HOST = "10.10.10.71"
tn = telnetlib.Telnet(HOST, port=55555, timeout=60)
tn.read_until(b"mpa:?")
tn.write(b'v' + b'\n\r')
while True:
line = tn.read_until(b"\n\r") # Check for new line and CR
print(line)
if (b"mpa:?") in line: # If last read line is the prompt, end loop
break
tn.close()