I am trying to use python 3.10.9 on windows to create a telnet session using telnetlib, but I have trouble to read the complete response.
I create a telnet session like
session = telnetlib.Telnet(host, port, timeout)
and then I write a command like
session.write(command + b"\n")
and then I wait some really long time (like 5 seconds) before I try to read the response using
session.read_some()
but I only get half of the response back!
The complete response is e.g.
Invalid arguments
Usage: $IMU,START,<SAMPLING_RATE>,<OUTPUT_RATE>
where SAMPLING_RATE = [1 : 1000] in Hz
OUTPUT_RATE = [1 : SAMPLING_RATE] in Hz
but all I read is the following:
b'\x1b[0GInvalid arguments\r\n\r\nUsage: $IMU,START,<'
More than half of the response is missing! How to read the complete response in a non-blocking way?
Other strange read methods:
- read_all: blocking
- read_eager: same issue
- read_very_eager: sometimes works, sometimes not. Seems to contain a repetition of the message ...
- read_lazy: does not read anything
- read_very_lazy: does not read anything
I have not the slightest idea what all these different read methods are for. The documentation is not helping at all.
But read_very_eager seems to work sometimes. But sometimes I get a response like
F
FI
FIL
FILT
FILTE
FILTER
and so on. But I am reading only once, not adding the output myself!
Maybe there is a more simple-to-use module I can use instead if telnetlib?
