/* TEMPLATE GENERATED TESTCASE FILE
Filename: CWE80_XSS__Servlet_URLConnection_01.java
Label Definition File: CWE80_XSS__Servlet.label.xml
Template File: sources-sink-01.tmpl.java
*/
/*
* @description
* CWE: 80 Cross Site Scripting (XSS)
* BadSource: URLConnection Read data from a web server with URLConnection
* GoodSource: A hardcoded string
* BadSink:  Display of data in web page without any encoding or validation
* Flow Variant: 01 Baseline
*
* */




import javax.servlet.http.*;

import java.io.BufferedReader;
import java.io.InputStreamReader;
import java.io.IOException;
import java.net.URL;
import java.net.URLConnection;

import java.util.logging.Level;

public class CWE80_XSS__Servlet_URLConnection_01 extends AbstractTestCaseServlet
{
    /* uses badsource and badsink */
    public void bad(HttpServletRequest request, HttpServletResponse response) throws Throwable
    {
        String data;

        data = ""; /* Initialize data */

        /* read input from URLConnection */
        {
            URLConnection urlConnection = (new URL("http://www.example.org/")).openConnection();
            BufferedReader readerBuffered = null;
            InputStreamReader readerInputStream = null;

            try
            {
                readerInputStream = new InputStreamReader(urlConnection.getInputStream(), "UTF-8");
                readerBuffered = new BufferedReader(readerInputStream);

                /* POTENTIAL FLAW: Read data from a web server with URLConnection */
                /* This will be reading the first "line" of the response body,
                 * which could be very long if there are no newlines in the HTML */
                data = readerBuffered.readLine();
            }
            catch (IOException exceptIO)
            {
                IO.logger.log(Level.WARNING, "Error with stream reading", exceptIO);
            }
            finally
            {
                /* clean up stream reading objects */
                try
                {
                    if (readerBuffered != null)
                    {
                        readerBuffered.close();
                    }
                }
                catch (IOException exceptIO)
                {
                    IO.logger.log(Level.WARNING, "Error closing BufferedReader", exceptIO);
                }

                try
                {
                    if (readerInputStream != null)
                    {
                        readerInputStream.close();
                    }
                }
                catch (IOException exceptIO)
                {
                    IO.logger.log(Level.WARNING, "Error closing InputStreamReader", exceptIO);
                }
            }
        }

        if (data != null)
        {
            /* POTENTIAL FLAW: Display of data in web page without any encoding or validation */
            response.getWriter().println("<br>bad(): data = " + data);
        }

    }

    public void good(HttpServletRequest request, HttpServletResponse response) throws Throwable
    {
        goodG2B(request, response);
    }

    /* goodG2B() - uses goodsource and badsink */
    private void goodG2B(HttpServletRequest request, HttpServletResponse response) throws Throwable
    {
        String data;

        /* FIX: Use a hardcoded string */
        data = "foo";

        if (data != null)
        {
            /* POTENTIAL FLAW: Display of data in web page without any encoding or validation */
            response.getWriter().println("<br>bad(): data = " + data);
        }

    }

    /* Below is the main(). It is only used when building this testcase on
     * its own for testing or for building a binary to use in testing binary
     * analysis tools. It is not used when compiling all the testcases as one
     * application, which is how source code analysis tools are tested.
     */
    public static void main(String[] args) throws ClassNotFoundException,
           InstantiationException, IllegalAccessException
    {
        mainFromParent(args);
    }
}

