Visual FoxPro

Connect a TCP or TLS Socket

Demonstrates Socket.Connect, which establishes a TCP connection to a host and port. Setting the TLS argument to _TRUE_ performs a TLS handshake after the TCP connection succeeds.

Background. The hostname may be a DNS name or a numeric IPv4/IPv6 address. The final argument bounds how long the connect attempt waits before failing. On failure, ConnectFailReason and LastErrorText provide detail.

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LOCAL lnSuccess
LOCAL loSocket
LOCAL lnBTls
LOCAL lnMaxWaitMs

lnSuccess = 0

loSocket = CreateObject('Chilkat.Socket')

*  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.
lnBTls = 1
lnMaxWaitMs = 5000
lnSuccess = loSocket.Connect("example.com",5000,lnBTls,lnMaxWaitMs)
IF (lnSuccess = 0) THEN
    ? loSocket.LastErrorText
    RELEASE loSocket
    CANCEL
ENDIF

*  StringCharset controls the character encoding used when sending and receiving text.
loSocket.StringCharset = "utf-8"

*  The socket is now connected and ready to send and receive data using whatever protocol the
*  application implements.
? "Connected: " + STR(loSocket.IsConnected)

*  Close the connection when finished.  The argument is the maximum time to wait for a clean
*  shutdown, in milliseconds.
lnSuccess = loSocket.Close(1000)
IF (lnSuccess = 0) THEN
    ? loSocket.LastErrorText
    RELEASE loSocket
    CANCEL
ENDIF

RELEASE loSocket