Java

Debugging with Socket Session Logging

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Debugging with socket session logging.

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

public class ChilkatExample {

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

        Socket socket = new Socket();

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

        // To demonstrate session logging, we'll connect to an
        // HTTP server and download the HTTP response header:
        boolean ssl = false;
        int maxWaitMillisec = 20000;
        try {
            socket.connect("www.chilkatsoft.com", 80, ssl, maxWaitMillisec);
        } catch (ChilkatException e) {
            System.out.println(e.getLastErrorText());
            return;
        }

        // Set maximum timeouts for reading an writing (in millisec)
        socket.setMaxReadIdleMs(10000);
        socket.setMaxSendIdleMs(10000);

        // The socket component includes a BuildHttpGetRequest
        // method for convenience. Build a GET and send it to
        // the web server:
        String httpGet = socket.buildHttpGetRequest("http://www.chilkatsoft.com/");

        // Send it...
        String httpHeader;
        try {
            socket.sendString(httpGet);

            // Read the response up to the first double CRLF:
            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());

        // Show the HTTP response header:
        System.out.println(httpHeader);
    }
}