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Tcl

Receive Text up to a Delimiter Byte

See more Socket/SSL/TLS Examples

Demonstrates Socket.ReceiveStringUntilByte, which receives bytes until a specific raw byte value is found, then decodes the preceding bytes using StringCharset. The delimiter is excluded from the returned string.

Background. The delimiter search is purely byte-oriented and does not recognize character boundaries. A common delimiter is the linefeed byte (decimal 10).

Chilkat Tcl Downloads

Tcl

load ./chilkat.dll

set success 0

set socket [new_CkSocket]

#  Connect to the server using TLS.  The 3rd argument enables the TLS handshake after the TCP
#  connection succeeds; the 4th is the maximum time to wait, in milliseconds.
set bTls 1
set maxWaitMs 5000
set success [CkSocket_Connect $socket "example.com" 5000 $bTls $maxWaitMs]
if {$success == 0} then {
    puts [CkSocket_lastErrorText $socket]
    delete_CkSocket $socket
    exit
}

#  StringCharset controls the character encoding used when sending and receiving text.
CkSocket_put_StringCharset $socket "utf-8"
#  Send a request using a simple application-defined text protocol in which each message ends with a
#  CRLF.
set command "STATUS\r\n"
set success [CkSocket_SendString $socket $command]
if {$success == 0} then {
    puts [CkSocket_lastErrorText $socket]
    delete_CkSocket $socket
    exit
}

#  Receive bytes until a specific raw byte value is found, then decode the preceding bytes using
#  StringCharset.  The delimiter itself is excluded from the returned string.  Here the delimiter is
#  the linefeed byte (decimal 10).
set line [CkSocket_receiveStringUntilByte $socket 10]
if {[CkSocket_get_LastMethodSuccess $socket] == 0} then {
    puts [CkSocket_lastErrorText $socket]
    delete_CkSocket $socket
    exit
}

puts "$line"

delete_CkSocket $socket