I am using Ssh.Net and a StreamReader on its ShellStream to read output from an ssh console. If you are familiar with console output, you surely know about typically table formatted data. Such as:
COLUMN1 COLUMN2 COLUMN3
value1 value2 value3
value4 value5 value6
value7 value8 value9
I am also reading the output directly via an SshCommand object and I dont have any formatting errors there. However when I am using StreamReader I get cryptic characters such as [m[1mX[m. The X is a single character, normally surrounded by spaces. This happens only next to single characters surrounded by multiple spaces. I also have this issue when characters are surrounded by brackets which results in something like [9999 or [6n
I will parse the result anyway, so I don't mind the characters, but I need to know wether they actually mean something and if they are consistent. If it is neither of that, I would be nice if you could tell me how I can fix this issue.
If it matters, I am connected to a MikroTik Router and I run the command certificate print detail without-paging. This error occurs in the header and I am using this code to output acquire a result and output the stream:
Dim response As String = ""
Dim reader As StreamReader = New StreamReader(shellStream)
Dim writer As StreamWriter = New StreamWriter(shellStream)
writer.WriteLine(cmd)
writer.Flush()
Thread.Sleep(500)
Dim line As String = ""
For i As Integer = 0 To 150
response += line
line = reader.ReadLine
response += vbCrLf
Next
Console.WriteLine(response)
Those are ANSI Escape Sequences - namely (replace X with correpsonding number):
[Xm - Text graphics mode (color, thickness, etc.)
[XB - Cursor down by X
[Xn - Probably new line
For more information look here, here or here
If it is of any interest: In my case I can replace every [Xm sequence because I am not using any of the given text formatting