module BBS::Telnet::LineInput

Line input of a telnet line: readline echoes what the caller types, with Backspace, on an ANSI terminal and a Commodore 64 alike.

Constants

ERASE: Takes back the last character on the caller’s screen: back, space, back.
MAX_LINE: The most bytes readline keeps in a line; further characters are dropped.

Public Instance Methods

readline (mask: nil)

Source

# File lib/bbs/telnet/line_input.rb, line 22
def readline(mask: nil)
  line = +''.b
  loop do
    raw  = @client.read(1) or return nil
    byte = telnet_data(raw.ord) or next
    done = edit_line(line, line_key(byte), mask)
    return done if done
  end
end

Reads a line typed by the caller, echoing it back, and returns it as a UTF-8 String without the line end (invalid bytes removed), or nil on hangup. Backspace deletes the last character; control characters and bytes beyond MAX_LINE are ignored. ENTER writes a CRLF.

mask: when given, echoed in place of each character (for passwords, e.g. '*'); nil echoes the characters themselves