Receive a 4-byte Length Prefix from a Socket

See more Socket/SSL/TLS Examples

Demonstrates Socket.ReceiveCount, which reads a four-byte length prefix as a signed 32-bit integer. A return value of -1 indicates failure.

Background. Reading the length prefix first tells the application exactly how many bytes to read for the message body, which is a reliable way to know when a full message has arrived.

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    success := false

    socket := chilkat.NewSocket()

    //  Connect to the server using TLS.
    bTls := true
    maxWaitMs := 5000
    success = socket.Connect("example.com",5000,bTls,maxWaitMs)
    if success == false {
        fmt.Println(socket.LastErrorText())
        socket.DisposeSocket()
        return
    }

    //  Read a four-byte length prefix as a signed 32-bit integer (network byte order by default).  A
    //  return value of -1 indicates failure.
    messageLength := socket.ReceiveCount()
    if messageLength < 0 {
        fmt.Println(socket.LastErrorText())
        socket.DisposeSocket()
        return
    }

    fmt.Println("The peer will send ", messageLength, " bytes.")

    socket.DisposeSocket()