(MFC) Asynchronous SSL Client (Deprecated) Example

Notice: The functionality described here is deprecated and replaced by a newer model for asynchronous method calls. The newer model was introduced in Chilkat v9.5.0.52, and is identified by methods having names ending in “Async” which return a task object.

Demonstrates how to connect to an SSL server, send a simple message, receive a simple response, and disconnect. This example uses the asynchronous methods to connect, send, and receive.

Chilkat C/C++ Library Downloads MS Visual C/C++ Libs

See Also: Using MFC CString in Chilkat

#include <CkSocket.h>

void ChilkatSample(void)
    {
    CkString strOut;

    // Notice: The functionality described here is deprecated and replaced 
    // by a newer model for asynchronous method calls. The newer model was 
    // introduced in Chilkat v9.5.0.52, and is identified by methods 
    // having names ending in “Async” which return a task object.

    CkSocket socket;

    bool ssl = true;
    int maxWaitMillisec = 20000;

    // The SSL server hostname may be an IP address, a domain name,
    // or "localhost".  You'll need to change this:
    const char *sslServerHost = 0;
    sslServerHost = "123.123.88.88";
    int sslServerPort = 8123;

    // Connect to the SSL server asynchronously in a background thread.
    bool success = socket.AsyncConnectStart(sslServerHost,sslServerPort,ssl,maxWaitMillisec);
    if (success != true) {
        strOut.append(socket.lastErrorText());
        strOut.append("\r\n");
        SetDlgItemText(IDC_EDIT1,strOut.getUnicode());
        return;
    }

    // Wait for the socket to become connected...
    while ((socket.get_AsyncConnectFinished() != true)) {
        // Sleep 1 second.
        socket.SleepMs(1000);
    }

    // Did the connect fail?
    if (socket.get_AsyncConnectSuccess() != true) {
        strOut.append(socket.asyncConnectLog());
        strOut.append("\r\n");
        SetDlgItemText(IDC_EDIT1,strOut.getUnicode());
        return;
    }

    // Set maximum timeouts for reading an writing (in millisec)
    socket.put_MaxReadIdleMs(20000);
    socket.put_MaxSendIdleMs(20000);

    // Send a "Hello Server! -EOM-" message:
    success = socket.AsyncSendString("Hello Server! -EOM-");
    if (success != true) {
        strOut.append(socket.lastErrorText());
        strOut.append("\r\n");
        SetDlgItemText(IDC_EDIT1,strOut.getUnicode());
        return;
    }

    // Wait for the send to finish
    while ((socket.get_AsyncSendFinished() != true)) {
        // Sleep 1 second.
        socket.SleepMs(1000);
    }

    // Did the send fail?
    if (socket.get_AsyncSendSuccess() != true) {
        strOut.append(socket.asyncSendLog());
        strOut.append("\r\n");
        SetDlgItemText(IDC_EDIT1,strOut.getUnicode());
        return;
    }

    // The server (in this example) is going to send a "Hello Client! -EOM-" 
    // message.  Begin reading asynchronously in a background thread:
    success = socket.AsyncReceiveUntilMatch("-EOM-");
    if (success != true) {
        strOut.append(socket.lastErrorText());
        strOut.append("\r\n");
        SetDlgItemText(IDC_EDIT1,strOut.getUnicode());
        return;
    }

    // Wait for the background read to finish
    while ((socket.get_AsyncReceiveFinished() != true)) {
        // Sleep 1 second.
        socket.SleepMs(1000);
    }

    // Did the receive fail?
    if (socket.get_AsyncReceiveSuccess() != true) {
        strOut.append(socket.asyncReceiveLog());
        strOut.append("\r\n");
        SetDlgItemText(IDC_EDIT1,strOut.getUnicode());
        return;
    }

    // Display the received message:
    strOut.append(socket.asyncReceivedString());
    strOut.append("\r\n");

    // Close the connection with the server
    // Wait a max of 20 seconds (20000 millsec)
    success = socket.Close(20000);


    SetDlgItemText(IDC_EDIT1,strOut.getUnicode());

    }