Go

Socket Receive String Until Specific Byte Value is Received

Demonstrates the Chilkat Socket ReceiveStringUntilByte method. Go

    success := false

    // This example requires the Chilkat API to have been previously unlocked.
    // See Global Unlock Sample for sample code.

    sock := chilkat.NewSocket()

    // --------------------------------------------------------------------
    // This example uses the public TCP echo service at https://tcpbin.com/
    // --------------------------------------------------------------------

    useTls := false
    port := 4242
    maxWaitMs := 5000
    success = sock.Connect("tcpbin.com",port,useTls,maxWaitMs)
    if success == false {
        fmt.Println(sock.LastErrorText())
        sock.DisposeSocket()
        return
    }

    // Wait a max of 2 seconds for a response..
    sock.SetMaxReadIdleMs(2000)

    // Send some strings, each terminated by a 0 byte.
    sock.SendString("This is the 1st string")
    sock.SendByte(0)
    sock.SendString("This is string number 2")
    sock.SendByte(0)

    // The tcpbin.com echo server only echoes after receiving an LF (linefeed char)
    sock.SendByte(10)

    // Now let's receive what is echoed back....
    // Receive each string and the NULL byte.
    // The call to ReceiveStringUntilByte will receive incoming data until the lookForByte is encountered.
    // The lookForByte is receive and discarded (it is not returned in the string)
    lookForByte := 0
    s1 := sock.ReceiveStringUntilByte(lookForByte)
    if sock.LastMethodSuccess() == false {
        fmt.Println(sock.LastErrorText())
        sock.DisposeSocket()
        return
    }

    fmt.Println(*s1)

    s2 := sock.ReceiveStringUntilByte(lookForByte)
    if sock.LastMethodSuccess() == false {
        fmt.Println(sock.LastErrorText())
        sock.DisposeSocket()
        return
    }

    fmt.Println(*s2)

    // The echo server will also echo back the final LF
    sock.ReceiveByte(true)
    maxWaitMs = 100
    sock.Close(100)

    // Output:
    // This is the 1st string
    // This is string number 2

    sock.DisposeSocket()