期望脚本捕获垃圾字符 - 需要删除

Question

我有一个开关，我正在尝试写入以从 hp 开关获取输出。源机器是 ubuntu 18.04。交换机上的代码版本是16.04。我尝试将交换机上的终端设置从默认的 vty100 更改为 ansi 和 none，但没有区别。如何摆脱下面显示的额外特殊字符？

set timeout 20
spawn ssh -l manager 192.168.10.10
expect "manager@192.168.10.10's password:"
send "admin\n"
expect "Press any key to continue"
send "j\n"
log_file -a hp.log
send "show vlan 10\n"
expect "labswitch#"
send "conf\n"
send "hostname newswitch\n"
expect "newswitch#"
send "exit\n"
expect "newswitch#"
send "logout\n"

我在日志文件和控制台中的脚本的每个部分都有这些额外的字符输出。需要从输出中删除这些字符。 ??

^[[?6l^[[1;30r^[[?7h^[[2J^[[1;1H^[[1920;1920H^[[6n^[[1;1HYour previous successful login (as manager) was on 2019-03-07 $ from 192.168.10.4
^[[1;30r^[[30;1H^[[30;1H^[[2K^[[30;1H^[[?25h^[[30;1H^[[30;1labswitch# ^[[30;1H^[[30;11H^[[30;1H^[[?25h^[[30;11H^[[1;0H^$ Status and Counters - VLAN Information - VLAN 10

  VLAN ID : 10
  Name : Server_Lab
  Status : Port-based
  Voice : No
  Jumbo : Yes
  Private VLAN : none
  Associated Primary VID : none
  Associated Secondary VIDs : none

  Port Information Mode     Unknown VLAN Status
  ---------------- -------- ------------ ----------
  11               Tagged   Learn        Up
  12               Tagged   Learn        Up


^[[1;30r^[[30;1H^[[30;1H^[[2K^[[30;1H^[[?25h^[[30;1H^[[30;1H

Answer 1

那些是ANSI Escape sequences

您应该可以使用以下方法将它们从日志文件中删除：

send "logout\r"    ;# idiomatically, use \r to "hit enter"
log_file           ;# turn off logging

# read the log file
set fid [open hp.log r]
set contents [read -nonewline $fid]
close $fid

# remove the escape sequences
regsub -all {3\[(?:\?|\d+;)?\d+[[:alpha:]]} $contents {} stripped

# write the new contents
set fid [open hp.log w]
puts $fid $stripped
close $fid

期望脚本捕获垃圾字符 - 需要删除

expect script capturing garbage characters - need to remove

expect