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(Swift 3,4,5...) Socket Send and Receive BinDataDemonstrates the Chilkat Socket ReceiveBdN and SendBd methods.
func chilkatTest() { // This example requires the Chilkat API to have been previously unlocked. // See Global Unlock Sample for sample code. let sock = CkoSocket()! // -------------------------------------------------------------------- // This example uses the public TCP echo service at https://tcpbin.com/ // -------------------------------------------------------------------- var useTls: Bool = false var port: Int = 4242 var maxWaitMs: Int = 5000 var success: Bool = sock.connect("tcpbin.com", port: port, ssl: useTls, maxWaitMs: maxWaitMs) if success == false { print("\(sock.lastErrorText!)") return } // Wait a max of 2 seconds for a response.. sock.maxReadIdleMs = 2000 // Send 26 bytes contained in a Chilkat BinData let bdToSend = CkoBinData()! var i: Int = 0 var byteVal: Int = 65 while i < 26 { bdToSend.appendByte(byteVal) byteVal = byteVal + 1 i = i + 1 } // Send the contents of the BinData // Pass zero's in the 2nd and 3rd arguments to send the entire contents of the BinData. sock.sendBd(bdToSend, offset: 0, numBytes: 0) // The tcpbin.com echo server only echoes after receiving an LF (linefeed char) sock.sendByte(10) // The echo server will echo back whatever is sent to it. // We should be able to read the same bytes back.. let bdRecv = CkoBinData()! // Receive the 26 bytes previously sent, plus the LF char. success = sock.receiveBdN(27, binData: bdRecv) if success == false { print("\(sock.lastErrorText!)") return } // Show the contents of bdRecv in hex format print("\(bdRecv.getEncoded("hex")!)") // Output: 4142434445464748494A4B4C4D4E4F505152535455565758595A0A } |
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