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Swift

Receive Text up to a Delimiter Byte

See more Socket/SSL/TLS Examples

Demonstrates Socket.ReceiveStringUntilByte, which receives bytes until a specific raw byte value is found, then decodes the preceding bytes using StringCharset. The delimiter is excluded from the returned string.

Background. The delimiter search is purely byte-oriented and does not recognize character boundaries. A common delimiter is the linefeed byte (decimal 10).

Chilkat Swift Downloads

Swift

func chilkatTest() {
    var success: Bool = false

    let socket = CkoSocket()!

    //  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.
    var bTls: Bool = true
    var maxWaitMs: Int = 5000
    success = socket.connect(hostname: "example.com", port: 5000, ssl: bTls, maxWaitMs: maxWaitMs)
    if success == false {
        print("\(socket.lastErrorText!)")
        return
    }

    //  StringCharset controls the character encoding used when sending and receiving text.
    socket.stringCharset = "utf-8"
    //  Send a request using a simple application-defined text protocol in which each message ends with a
    //  CRLF.
    var command: String? = "STATUS\r\n"
    success = socket.sendString(str: command)
    if success == false {
        print("\(socket.lastErrorText!)")
        return
    }

    //  Receive bytes until a specific raw byte value is found, then decode the preceding bytes using
    //  StringCharset.  The delimiter itself is excluded from the returned string.  Here the delimiter is
    //  the linefeed byte (decimal 10).
    var line: String? = socket.receiveString(untilByte: 10)
    if socket.lastMethodSuccess == false {
        print("\(socket.lastErrorText!)")
        return
    }

    print("\(line!)")

}