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Tcl

Receive Text from a Socket into a StringBuilder

See more Socket/SSL/TLS Examples

Demonstrates Socket.ReceiveSb, which receives text, decodes it using StringCharset, and appends it to a StringBuilder.

Background. Text send and receive operations encode and decode bytes using the StringCharset property. For plain ASCII or UTF-8 protocols, setting StringCharset to utf-8 is a safe default.

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 text and append it to a StringBuilder, decoding using StringCharset.
set sb [new_CkStringBuilder]

set success [CkSocket_ReceiveSb $socket $sb]
if {$success == 0} then {
    puts [CkSocket_lastErrorText $socket]
    delete_CkSocket $socket
    delete_CkStringBuilder $sb
    exit
}

set responseText [CkStringBuilder_getAsString $sb]
if {[CkStringBuilder_get_LastMethodSuccess $sb] == 0} then {
    puts [CkStringBuilder_lastErrorText $sb]
    delete_CkSocket $socket
    delete_CkStringBuilder $sb
    exit
}

puts "$responseText"

delete_CkSocket $socket
delete_CkStringBuilder $sb