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#!/usr/bin/tclsh
proc SpawnEchoServer {fd host port} {
fconfigure $fd -encoding binary -translation binary -blocking no -buffering none
fileevent $fd readable "EchoBack $fd"
# --- puts stderr "Connected: [fconfigure $fd -peername]"
}
proc EchoBack {fd} {
# --- puts stderr "READ-READY"
while 1 {
# --- puts stderr "READING 4096"
set r [read $fd 4096]
if {$r == ""} {
if {[eof $fd]} {
# --- puts stderr "EOF. Closing"
close $fd
return
}
# --- puts stderr "SPURIOUS, giving up read"
return
}
# Set blocking for a short moment of sending
# in order to prevent losing data that must wait
# --- puts stderr "SENDING [string bytelength $r] bytes"
fconfigure $fd -blocking yes
puts -nonewline $fd $r
fconfigure $fd -blocking no
if {[fblocked $fd]} {
# --- puts stderr "NO MORE DATA"
# Nothing more to read
return
}
# --- puts stderr "AGAIN"
}
}
socket -server SpawnEchoServer $argv
puts stderr "SERVER READY"
vwait tk
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