/* TEMPLATE GENERATED TESTCASE FILE
Filename: CWE81_XSS_Error_Message__Servlet_URLConnection_12.java
Label Definition File: CWE81_XSS_Error_Message__Servlet.label.xml
Template File: sources-sink-12.tmpl.java
*/
/*
* @description
* CWE: 81 Cross Site Scripting (XSS) in Error Message
* BadSource: URLConnection Read data from a web server with URLConnection
* GoodSource: A hardcoded string
* BadSink: sendErrorServlet XSS in sendError
* Flow Variant: 12 Control flow: if(IO.staticReturnsTrueOrFalse())
*
* */





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 CWE81_XSS_Error_Message__Servlet_URLConnection_12 extends AbstractTestCaseServlet
{
    /* uses badsource and badsink - see how tools report flaws that don't always occur */
    public void bad(HttpServletRequest request, HttpServletResponse response) throws Throwable
    {
        String data;
        if (IO.staticReturnsTrueOrFalse())
        {
            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);
                    }
                }
            }
        }
        else
        {

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

        }

        if (data != null)
        {
            /* POTENTIAL FLAW: script code (e.g. id=<script>alert('xss')</script>) is sent to the client;
            * The built-in J2EE server automatically does some HTML entity encoding.
            * Therefore, to test this, change response.sendError to response.getWriter().println and remove the 404,
            */
            response.sendError(404, "<br>bad() - Parameter name has value " + data);
        }

    }

    /* goodG2B() - use goodsource and badsink by changing the "if" so that
     * both branches use the GoodSource */
    private void goodG2B(HttpServletRequest request, HttpServletResponse response) throws Throwable
    {
        String data;
        if (IO.staticReturnsTrueOrFalse())
        {
            /* FIX: Use a hardcoded string */
            data = "foo";
        }
        else
        {

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

        }

        if (data != null)
        {
            /* POTENTIAL FLAW: script code (e.g. id=<script>alert('xss')</script>) is sent to the client;
            * The built-in J2EE server automatically does some HTML entity encoding.
            * Therefore, to test this, change response.sendError to response.getWriter().println and remove the 404,
            */
            response.sendError(404, "<br>bad() - Parameter name has value " + data);
        }

    }

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

    /* 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);
    }
}
