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package com.robinson.servlet;import com.robinson.sql.*;import com.robinson.util.ADAuth;import javax.servlet.http.HttpServlet;import javax.servlet.http.HttpServletRequest;import javax.servlet.http.HttpServletResponse;import javax.servlet.ServletConfig;import javax.servlet.ServletException;import java.sql.Connection;import java.sql.SQLException;import java.sql.DriverManager;import java.io.IOException;import java.io.PrintWriter;/** * Code copyright Sean Robinson */public class MainServlet extends HttpServlet {    private String title;    private String dbtype;    private String dburl;    private String domain;    private String server;    private String port;    private Connection dbcon;    private InkSQL inkSQL;    private InventorySQL invSQL;    private PrinterSQL printSQL;    private TeacherSQL teachSQL;    private UserSQL userSQL;    public void init(ServletConfig config) throws ServletException {        title = config.getServletContext().getInitParameter("title");        dbtype = config.getServletContext().getInitParameter("dbtype");        dburl = config.getServletContext().getInitParameter("dburl");        domain = config.getServletContext().getInitParameter("domain");        server = config.getServletContext().getInitParameter("server");        port = config.getServletContext().getInitParameter("port");        try {            Class.forName(dbtype).newInstance();            dbcon = DriverManager.getConnection(dburl,"root","root");            inkSQL = new InkSQL(dbcon);            invSQL = new InventorySQL(dbcon);            printSQL = new PrinterSQL(dbcon);            teachSQL = new TeacherSQL(dbcon);            userSQL = new UserSQL(dbcon);        } catch (Exception e){            throw new ServletException(e);        }    }    public String getPath(HttpServletRequest request, String path) {        return request.getContextPath()+request.getServletPath()+"/"+path;    }    public void checkSession(HttpServletRequest request, HttpServletResponse response) throws IOException {        if(request.getSession().getAttribute("user") == null){            response.sendRedirect(getPath(request,"Login"));        }    }    public void printTop(HttpServletRequest request, HttpServletResponse response, boolean print) throws IOException {        response.setContentType("text/html");        PrintWriter out = response.getWriter();        out.println("<!DOCTYPE HTML PUBLIC \"-//W3C//DTD HTML 4.01 Transitional//EN\"\n" +                "\"http://www.w3.org/TR/html4/loose.dtd\">\n" +                "<html>\n" +                "<head>\n" +                "<title>"+title+"</title>\n" +                "<meta http-equiv=\"Content-Type\" content=\"text/html; charset=iso-8859-1\">\n" +                "</head>\n");        if(print){            out.println("<body onLoad=javascript:window.print();><h1><center>Printing Inventory</center></h1>");        } else {            out.println("<body>");        }    }    public void printBottom(HttpServletRequest request, HttpServletResponse response) throws IOException {        PrintWriter out = response.getWriter();        out.println("<br><hr><font size=\"2\">Design and Code &copy; Sean Robinson</font>\n" +                "</body>\n" +                "</html>\n");    }    public void printLogin(HttpServletRequest request, HttpServletResponse response) throws IOException {        PrintWriter out = response.getWriter();        printTop(request,response,false);        out.println("<form name=\"form1\" method=\"post\" action=\""+getPath(request,"Verify_Login")+"\">\n" +                "  <p>Username: <input name=\"user\" type=\"text\" id=\"user\">\n" +                "  </p>\n" +                "  <p>Password: \n" +                "    <input name=\"password\" type=\"password\" id=\"password\">\n" +                "  </p>\n" +                "  <p>\n" +                "    <input name=\"Submit\" type=\"submit\" id=\"Submit\" value=\"Login\"> \n" +                "  </p>\n" +                "</form>");        printBottom(request,response);    }    public void executeLogin(HttpServletRequest request, HttpServletResponse response) throws IOException,    SQLException {        String user = request.getParameter("user");        String pass = request.getParameter("password");        if(user == null || pass == null || user.equals("")||pass.equals("")){            response.sendRedirect(getPath(request,"Login?reason=1"));        } else {            if(userSQL.isUser(user)){                if(ADAuth.authenticate(domain,server,port,user,pass)){                    request.getSession().setAttribute("user",user);                    response.sendRedirect(getPath(request,"Home"));                } else {                    response.sendRedirect(getPath(request,"Login?reason=3"));                }            } else {                response.sendRedirect(getPath(request,"Login?reason=2"));            }        }    }    public void printHome(HttpServletRequest request, HttpServletResponse response) throws IOException {        PrintWriter out = response.getWriter();        checkSession(request,response);        printTop(request,response,false);        out.println("<h3>System Panel</h3>");        out.println("Manage Inventory");        out.println("Manage Ink/Toner");        out.println("Manage Printers");        out.println("Manage Teachers");        printBottom(request,response);    }   public void managePath(HttpServletRequest request,HttpServletResponse response) throws IOException,           SQLException {       String path = request.getPathInfo();       if(path == null || path.equals("")){           response.sendRedirect(getPath(request,"Home"));       } else {           if(path.equals("/")){               response.sendRedirect(getPath(request,"Home"));           } else if (path.equals("/Home")){               printHome(request,response);           } else if (path.equals("/Login")){               printLogin(request,response);           } else if (path.equals("/Verify_Login")){               executeLogin(request,response);           } else if (path.equals("/View")){                          }       }   }    public void doGet(HttpServletRequest request, HttpServletResponse response) throws ServletException {        try {            managePath(request,response);        } catch (Exception e) {            throw new ServletException(e);        }    }    public void doPost(HttpServletRequest request, HttpServletResponse response) throws ServletException {        doGet(request, response);    }}