Java

Demonstrates KeepSessionLog and SessionLog

The Chilkat Socket component provides properties for keeping a session log making it possible to see the exact bytes received and sent on a TCP/IP or SSL/TLS connection. To enable session logging, set the KeepSessionLog property = _TRUE_. The SessionLogEncoding property controls how binary, non-printable bytes are represented in the log. There are two possible settings: Possible values are "esc" and "hex". The default value is "esc".

When set to "hex", the bytes are encoded as a hexidecimalized string. The "esc" encoding is a C-string like encoding, and is more compact than hex if most of the data to be logged is text. Printable us-ascii chars are unmodified. Common "C" control chars are represented as "\r", "\n", "\t", etc. Non-printable and byte values greater than 0x80 are escaped using a backslash and hex encoding: \xHH. Certain printable chars are backslashed: SPACE, double-quote, single-quote, etc.

Chilkat2 Java

import com.chilkatsoft.chilkat2.BinData;
import com.chilkatsoft.chilkat2.ChilkatException;
import com.chilkatsoft.chilkat2.Socket;

public class ChilkatExample {

    public static void main(String[] args) {
        // This example assumes the Chilkat Socket API to have been previously unlocked.
        // See Socket Unlock Sample for sample code.

        Socket socket = new Socket();

        // Enable session logging:
        socket.setKeepSessionLog(true);
        socket.setSessionLogEncoding("esc");

        boolean tls = true;
        int maxWaitMillisec = 20000;
        try {
            socket.connect("www.chilkatsoft.com", 443, tls, maxWaitMillisec);

            // Send a GET start line to the web server..
            socket.sendString("GET /abc123.abc123 HTTP/1.1\r\n");
        } catch (ChilkatException e) {
            System.out.println(e.getLastErrorText());
            return;
        }

        // Send some bytes that will cause an error...
        BinData binData = new BinData();
        binData.appendEncoded("01020304", "hex");
        socket.sendBd(binData, 0, 0);

        // Read the response up to the first double CRLF:
        String httpHeader;
        try {
            httpHeader = socket.receiveUntilMatch("\r\n\r\n");
        } catch (ChilkatException e) {
            System.out.println(e.getLastErrorText());
            return;
        }

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

        // Display the session log:
        System.out.println(socket.getSessionLog());

        // The Session log will show the exact bytes sent and received.
        // In this case, the session log shows:

        //     SendString: GET\x20/abc123.abc123\x20HTTP/1.1\r\n
        //
        //     SendBytes: \x01\x02\x03\x04
        //     ReceiveUntilMatch: HTTP/1.1\x20400\x20Bad\x20Request\r\n
        //         Content-Type:\x20text/html;\x20charset=us-ascii\r\n
        //         Server:\x20Microsoft-HTTPAPI/2.0\r\n
        //         Date:\x20Thu,\x2027\x20Oct\x202016\x2013:16:02\x20GMT\r\n
        //         Connection:\x20close\r\n
        //         Content-Length:\x20339\r\n
        //         \r\n
        //         <!DOCTYPE\x20HTML\x20PUBLIC\x20\"-//W3C//DTD\x20HTML\x204.01//EN\"\"http://www.w
        //         3.org/TR/html4/strict.dtd\">\r\n
        //         <HTML><HEAD><TITLE>Bad\x20Request</TITLE>\r\n
        //         <META\x20HTTP-EQUIV=\"Content-Type\"\x20Content=\"text/html;\x20charset=us-ascii
        //         \"></HEAD>\r\n
        //         <BODY><h2>Bad\x20Request\x20-\x20Invalid\x20Header</h2>\r\n
        //         <hr><p>HTTP\x20Error\x20400.\x20The\x20request\x20has\x20an\x20invalid\x20header
        //         \x20name.</p>\r\n
        //         </BODY></HTML>\r\n
        //
    }
}