Lianja

Send a 32-bit Integer over a Socket

Demonstrates Socket.SendInt32, which sends a value as a four-byte signed integer in the selected byte order.

Background. Fixed-size integers and length prefixes are common building blocks for application-defined binary protocols. Byte order is selectable, with big-endian being network byte order.

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llSuccess = .F.

loSocket = createobject("CkSocket")

//  Connect to the server using TLS.
llBTls = .T.
lnMaxWaitMs = 5000
llSuccess = loSocket.Connect("example.com",5000,llBTls,lnMaxWaitMs)
if (llSuccess = .F.) then
    ? loSocket.LastErrorText
    release loSocket
    return
endif

//  Send the value as a four-byte signed integer.  Use .T. for network byte order (big-endian) or
//  .F. for little-endian.
llBBigEndian = .T.
llSuccess = loSocket.SendInt32(1000000,llBBigEndian)
if (llSuccess = .F.) then
    ? loSocket.LastErrorText
    release loSocket
    return
endif

? "32-bit integer sent."


release loSocket