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void org::mortbay::servlet::Dump::doGet ( HttpServletRequest  req,
HttpServletResponse  resp 
) throws ServletException, IOException [inline]

Called by the server (via the service method) to allow a servlet to handle a GET request.

Overriding this method to support a GET request also automatically supports an HTTP HEAD request. A HEAD request is a GET request that returns no body in the response, only the request header fields.

When overriding this method, read the request data, write the response headers, get the response's writer or output stream object, and finally, write the response data. It's best to include content type and encoding. When using a PrintWriter object to return the response, set the content type before accessing the PrintWriter object.

The servlet container must write the headers before committing the response, because in HTTP the headers must be sent before the response body.

Where possible, set the Content-Length header (with the javax.servlet.ServletResponse#setContentLength method), to allow the servlet container to use a persistent connection to return its response to the client, improving performance. The content length is automatically set if the entire response fits inside the response buffer.

When using HTTP 1.1 chunked encoding (which means that the response has a Transfer-Encoding header), do not set the Content-Length header.

The GET method should be safe, that is, without any side effects for which users are held responsible. For example, most form queries have no side effects. If a client request is intended to change stored data, the request should use some other HTTP method.

The GET method should also be idempotent, meaning that it can be safely repeated. Sometimes making a method safe also makes it idempotent. For example, repeating queries is both safe and idempotent, but buying a product online or modifying data is neither safe nor idempotent.

If the request is incorrectly formatted, doGet returns an HTTP "Bad Request" message.

Parameters:
req an HttpServletRequest object that contains the request the client has made of the servlet
resp an HttpServletResponse object that contains the response the servlet sends to the client
Exceptions:
IOException if an input or output error is detected when the servlet handles the GET request
ServletException if the request for the GET could not be handled
See also:
javax.servlet.ServletResponse::setContentType

Reimplemented from javax::servlet::http::HttpServlet.

Definition at line 72 of file Dump.java.

References org::mortbay::html::Select::add(), org::mortbay::html::Composite::add(), org::mortbay::html::TableForm::addButton(), org::mortbay::html::Table::addCell(), org::mortbay::html::TableForm::addFileField(), org::mortbay::html::Table::addHeading(), org::mortbay::html::TableForm::addSelect(), org::mortbay::html::TableForm::addTextField(), org::mortbay::html::Element::attribute(), org::mortbay::html::Table::cell, javax::servlet::ServletContext::getAttributeNames(), javax::servlet::GenericServlet::getInitParameter(), javax::servlet::ServletContext::getInitParameterNames(), javax::servlet::GenericServlet::getInitParameterNames(), javax::servlet::http::Cookie::getName(), org::mortbay::servlet::MultiPartRequest::getPartNames(), javax::servlet::GenericServlet::getServletContext(), org::mortbay::servlet::MultiPartRequest::getString(), javax::servlet::http::Cookie::getValue(), org::mortbay::html::Element::left(), org::mortbay::html::Form::method(), org::mortbay::html::Composite::nest, org::mortbay::html::Table::newHeading(), org::mortbay::html::Table::newRow(), org::mortbay::html::Element::right(), javax::servlet::ServletContext::setAttribute(), javax::servlet::http::Cookie::setComment(), javax::servlet::http::Cookie::setMaxAge(), javax::servlet::http::Cookie::setPath(), javax::servlet::http::Cookie::setVersion(), org::mortbay::html::Page::title(), and org::mortbay::html::Page::write().

Referenced by doPost().

    {
        request.setAttribute("Dump", this);
        request.setCharacterEncoding("ISO_8859_1");
        getServletContext().setAttribute("Dump",this);
        
        String info= request.getPathInfo();
        if (info != null && info.endsWith("Exception"))
        {
            try
            {
                throw (Throwable) (Loader.loadClass(this.getClass(), info.substring(1)).newInstance());
            }
            catch (Throwable th)
            {
                throw new ServletException(th);
            }
        }

        String redirect= request.getParameter("redirect");
        if (redirect != null && redirect.length() > 0)
        {
            response.getOutputStream().println("THIS SHOULD NOT BE SEEN!");
            response.sendRedirect(redirect);
            response.getOutputStream().println("THIS SHOULD NOT BE SEEN!");
            return;
        }

        String error= request.getParameter("error");
        if (error != null && error.length() > 0)
        {
            response.getOutputStream().println("THIS SHOULD NOT BE SEEN!");
            response.sendError(Integer.parseInt(error));
            response.getOutputStream().println("THIS SHOULD NOT BE SEEN!");
            return;
        }

        String length= request.getParameter("length");
        if (length != null && length.length() > 0)
        {
            response.setContentLength(Integer.parseInt(length));
        }

        String buffer= request.getParameter("buffer");
        if (buffer != null && buffer.length() > 0)
            response.setBufferSize(Integer.parseInt(buffer));

        request.setCharacterEncoding("UTF-8");
        response.setContentType("text/html");

        if (info != null && info.indexOf("Locale/") >= 0)
        {
            try
            {
                String locale_name= info.substring(info.indexOf("Locale/") + 7);
                Field f= java.util.Locale.class.getField(locale_name);
                response.setLocale((Locale)f.get(null));
            }
            catch (Exception e)
            {
                LogSupport.ignore(log, e);
                response.setLocale(Locale.getDefault());
            }
        }

        String cn= request.getParameter("cookie");
        String cv=request.getParameter("value");
        String v=request.getParameter("version");
        if (cn!=null && cv!=null)
        {
            Cookie cookie= new Cookie(cn, cv);
            cookie.setComment("Cookie from dump servlet");
            if (v!=null)
            {
                cookie.setMaxAge(300);
                cookie.setPath("/");
                cookie.setVersion(Integer.parseInt(v));
            }
            response.addCookie(cookie);
        }

        String pi= request.getPathInfo();
        if (pi != null && pi.startsWith("/ex"))
        {
            OutputStream out= response.getOutputStream();
            out.write("</H1>This text should be reset</H1>".getBytes());
            if ("/ex0".equals(pi))
                throw new ServletException("test ex0", new Throwable());
            if ("/ex1".equals(pi))
                throw new IOException("test ex1");
            if ("/ex2".equals(pi))
                throw new UnavailableException("test ex2");
            if ("/ex3".equals(pi))
                throw new HttpException(501);
        }

        PrintWriter pout= response.getWriter();
        Page page= null;

        try
        {
            page= new Page();
            page.title("Dump Servlet");

            page.add(new Heading(1, "Dump Servlet"));
            Table table= new Table(0).cellPadding(0).cellSpacing(0);
            page.add(table);
            table.newRow();
            table.addHeading("getMethod:&nbsp;").cell().right();
            table.addCell("" + request.getMethod());
            table.newRow();
            table.addHeading("getContentLength:&nbsp;").cell().right();
            table.addCell(Integer.toString(request.getContentLength()));
            table.newRow();
            table.addHeading("getContentType:&nbsp;").cell().right();
            table.addCell("" + request.getContentType());
            table.newRow();
            table.addHeading("getCharacterEncoding:&nbsp;").cell().right();
            table.addCell("" + request.getCharacterEncoding());
            table.newRow();
            table.addHeading("getRequestURI:&nbsp;").cell().right();
            table.addCell("" + request.getRequestURI());
            table.newRow();
            table.addHeading("getRequestURL:&nbsp;").cell().right();
            table.addCell("" + request.getRequestURL());
            table.newRow();
            table.addHeading("getContextPath:&nbsp;").cell().right();
            table.addCell("" + request.getContextPath());
            table.newRow();
            table.addHeading("getServletPath:&nbsp;").cell().right();
            table.addCell("" + request.getServletPath());
            table.newRow();
            table.addHeading("getPathInfo:&nbsp;").cell().right();
            table.addCell("" + request.getPathInfo());
            table.newRow();
            table.addHeading("getPathTranslated:&nbsp;").cell().right();
            table.addCell("" + request.getPathTranslated());
            table.newRow();
            table.addHeading("getQueryString:&nbsp;").cell().right();
            table.addCell("" + request.getQueryString());

            table.newRow();
            table.addHeading("getProtocol:&nbsp;").cell().right();
            table.addCell("" + request.getProtocol());
            table.newRow();
            table.addHeading("getScheme:&nbsp;").cell().right();
            table.addCell("" + request.getScheme());
            table.newRow();
            table.addHeading("getServerName:&nbsp;").cell().right();
            table.addCell("" + request.getServerName());
            table.newRow();
            table.addHeading("getServerPort:&nbsp;").cell().right();
            table.addCell("" + Integer.toString(request.getServerPort()));
            table.newRow();
            table.addHeading("getLocalName:&nbsp;").cell().right();
            table.addCell("" + request.getLocalName());
            table.newRow();
            table.addHeading("getLocalAddr:&nbsp;").cell().right();
            table.addCell("" + request.getLocalAddr());
            table.newRow();
            table.addHeading("getLocalPort:&nbsp;").cell().right();
            table.addCell("" + Integer.toString(request.getLocalPort()));
            table.newRow();
            table.addHeading("getRemoteUser:&nbsp;").cell().right();
            table.addCell("" + request.getRemoteUser());
            table.newRow();
            table.addHeading("getRemoteAddr:&nbsp;").cell().right();
            table.addCell("" + request.getRemoteAddr());
            table.newRow();
            table.addHeading("getRemoteHost:&nbsp;").cell().right();
            table.addCell("" + request.getRemoteHost());
            table.newRow();
            table.addHeading("getRemotePort:&nbsp;").cell().right();
            table.addCell("" + request.getRemotePort());
            table.newRow();
            table.addHeading("getRequestedSessionId:&nbsp;").cell().right();
            table.addCell("" + request.getRequestedSessionId());
            table.newRow();
            table.addHeading("isSecure():&nbsp;").cell().right();
            table.addCell("" + request.isSecure());

            table.newRow();
            table.addHeading("isUserInRole(admin):&nbsp;").cell().right();
            table.addCell("" + request.isUserInRole("admin"));

            table.newRow();
            table.addHeading("getLocale:&nbsp;").cell().right();
            table.addCell("" + request.getLocale());

            Enumeration locales= request.getLocales();
            while (locales.hasMoreElements())
            {
                table.newRow();
                table.addHeading("getLocales:&nbsp;").cell().right();
                table.addCell(locales.nextElement());
            }

            table.newRow();
            table
                .newHeading()
                .cell()
                .nest(new Font(2, true))
                .add("<BR>Other HTTP Headers")
                .attribute("COLSPAN", "2")
                .left();
            Enumeration h= request.getHeaderNames();
            String name;
            while (h.hasMoreElements())
            {
                name= (String)h.nextElement();

                Enumeration h2= request.getHeaders(name);
                while (h2.hasMoreElements())
                {
                    String hv= (String)h2.nextElement();
                    table.newRow();
                    table.addHeading(name + ":&nbsp;").cell().right();
                    table.addCell(hv);
                }
            }

            table.newRow();
            table
                .newHeading()
                .cell()
                .nest(new Font(2, true))
                .add("<BR>Request Parameters")
                .attribute("COLSPAN", "2")
                .left();
            h= request.getParameterNames();
            while (h.hasMoreElements())
            {
                name= (String)h.nextElement();
                table.newRow();
                table.addHeading(name + ":&nbsp;").cell().right();
                table.addCell(request.getParameter(name));
                String[] values= request.getParameterValues(name);
                if (values == null)
                {
                    table.newRow();
                    table.addHeading(name + " Values:&nbsp;").cell().right();
                    table.addCell("NULL!!!!!!!!!");
                }
                else
                    if (values.length > 1)
                    {
                        for (int i= 0; i < values.length; i++)
                        {
                            table.newRow();
                            table.addHeading(name + "[" + i + "]:&nbsp;").cell().right();
                            table.addCell(values[i]);
                        }
                    }
            }

            table.newRow();
            table
                .newHeading()
                .cell()
                .nest(new Font(2, true))
                .add("<BR>Cookies")
                .attribute("COLSPAN", "2")
                .left();
            Cookie[] cookies = request.getCookies();
            for (int i=0; cookies!=null && i<cookies.length;i++)
            {
                Cookie cookie = cookies[i];

                table.newRow();
                table.addHeading(cookie.getName() + ":&nbsp;").cell().attribute("VALIGN", "TOP").right();
                table.addCell(cookie.getValue());
            }
            
            /* ------------------------------------------------------------ */
            table.newRow();
            table
                .newHeading()
                .cell()
                .nest(new Font(2, true))
                .add("<BR>Request Attributes")
                .attribute("COLSPAN", "2")
                .left();
            Enumeration a= request.getAttributeNames();
            while (a.hasMoreElements())
            {
                name= (String)a.nextElement();
                table.newRow();
                table.addHeading(name + ":&nbsp;").cell().attribute("VALIGN", "TOP").right();
                table.addCell("<pre>" + toString(request.getAttribute(name)) + "</pre>");
            }            

            /* ------------------------------------------------------------ */
            table.newRow();
            table
                .newHeading()
                .cell()
                .nest(new Font(2, true))
                .add("<BR>Servlet InitParameters")
                .attribute("COLSPAN", "2")
                .left();
            a= getInitParameterNames();
            while (a.hasMoreElements())
            {
                name= (String)a.nextElement();
                table.newRow();
                table.addHeading(name + ":&nbsp;").cell().attribute("VALIGN", "TOP").right();
                table.addCell("<pre>" + toString(getInitParameter(name)) + "</pre>");
            }

            table.newRow();
            table
                .newHeading()
                .cell()
                .nest(new Font(2, true))
                .add("<BR>Context InitParameters")
                .attribute("COLSPAN", "2")
                .left();
            a= getServletContext().getInitParameterNames();
            while (a.hasMoreElements())
            {
                name= (String)a.nextElement();
                table.newRow();
                table.addHeading(name + ":&nbsp;").cell().attribute("VALIGN", "TOP").right();
                table.addCell("<pre>" + toString(getServletContext().getInitParameter(name)) + "</pre>");
            }

            table.newRow();
            table
                .newHeading()
                .cell()
                .nest(new Font(2, true))
                .add("<BR>Context Attributes")
                .attribute("COLSPAN", "2")
                .left();
            a= getServletContext().getAttributeNames();
            while (a.hasMoreElements())
            {
                name= (String)a.nextElement();
                table.newRow();
                table.addHeading(name + ":&nbsp;").cell().attribute("VALIGN", "TOP").right();
                table.addCell("<pre>" + toString(getServletContext().getAttribute(name)) + "</pre>");
            }

            if (request.getContentType() != null
                && request.getContentType().startsWith("multipart/form-data")
                && request.getContentLength() < 1000000)
            {
                MultiPartRequest multi= new MultiPartRequest(request);
                String[] parts= multi.getPartNames();

                table.newRow();
                table
                    .newHeading()
                    .cell()
                    .nest(new Font(2, true))
                    .add("<BR>Multi-part content")
                    .attribute("COLSPAN", "2")
                    .left();
                for (int p= 0; p < parts.length; p++)
                {
                    name= parts[p];
                    table.newRow();
                    table.addHeading(name + ":&nbsp;").cell().attribute("VALIGN", "TOP").right();
                    table.addCell("<pre>" + multi.getString(parts[p]) + "</pre>");
                }
            }

            String res= request.getParameter("resource");
            if (res != null && res.length() > 0)
            {
                table.newRow();
                table
                    .newHeading()
                    .cell()
                    .nest(new Font(2, true))
                    .add("<BR>Get Resource: " + res)
                    .attribute("COLSPAN", "2")
                    .left();

                table.newRow();
                table.addHeading("this.getClass():&nbsp;").cell().right();
                table.addCell("" + this.getClass().getResource(res));

                table.newRow();
                table.addHeading("this.getClass().getClassLoader():&nbsp;").cell().right();
                table.addCell("" + this.getClass().getClassLoader().getResource(res));

                table.newRow();
                table.addHeading("Thread.currentThread().getContextClassLoader():&nbsp;").cell().right();
                table.addCell("" + Thread.currentThread().getContextClassLoader().getResource(res));

                table.newRow();
                table.addHeading("getServletContext():&nbsp;").cell().right();
                try{table.addCell("" + getServletContext().getResource(res));}
                catch(Exception e) {table.addCell("" +e);}
            }
            

            /* ------------------------------------------------------------ */
            page.add(Break.para);
            page.add(new Heading(1, "Request Wrappers"));
            ServletRequest rw=request;
            int w=0;
            while (rw !=null)
            {
                page.add((w++)+": "+rw.getClass().getName()+"<br/>");
                if (rw instanceof HttpServletRequestWrapper)
                    rw=((HttpServletRequestWrapper)rw).getRequest();
                else if (rw  instanceof ServletRequestWrapper)
                    rw=((ServletRequestWrapper)rw).getRequest();
                else
                    rw=null;
            }
            
            page.add(Break.para);
            page.add(new Heading(1, "International Characters"));
            page.add("Directly encoced:  Dürst<br/>");
            page.add("HTML reference: D&uuml;rst<br/>");
            page.add("Decimal (252) 8859-1: D&#252;rst<br/>");
            page.add("Hex (xFC) 8859-1: D&#xFC;rst<br/>");
            page.add(
                "Javascript unicode (00FC) : <script language='javascript'>document.write(\"D\u00FCrst\");</script><br/>");
            page.add(Break.para);
            page.add(new Heading(1, "Form to generate GET content"));
            TableForm tf= new TableForm(response.encodeURL(getURI(request)));
            tf.method("GET");
            tf.addTextField("TextField", "TextField", 20, "value");
            tf.addButton("Action", "Submit");
            page.add(tf);

            page.add(Break.para);
            page.add(new Heading(1, "Form to generate POST content"));
            tf= new TableForm(response.encodeURL(getURI(request)));
            tf.method("POST");
            tf.addTextField("TextField", "TextField", 20, "value");
            Select select= tf.addSelect("Select", "Select", true, 3);
            select.add("ValueA");
            select.add("ValueB1,ValueB2");
            select.add("ValueC");
            tf.addButton("Action", "Submit");
            page.add(tf);

            page.add(new Heading(1, "Form to upload content"));
            tf= new TableForm(response.encodeURL(getURI(request)));
            tf.method("POST");
            tf.attribute("enctype", "multipart/form-data");
            tf.addFileField("file", "file");
            tf.addButton("Upload", "Upload");
            page.add(tf);

            page.add(new Heading(1, "Form to get Resource"));
            tf= new TableForm(response.encodeURL(getURI(request)));
            tf.method("POST");
            tf.addTextField("resource", "resource", 20, "");
            tf.addButton("Action", "getResource");
            page.add(tf);

        }
        catch (Exception e)
        {
            log.warn(LogSupport.EXCEPTION, e);
        }

        page.write(pout);

        String data= request.getParameter("data");
        if (data != null && data.length() > 0)
        {
            int d= Integer.parseInt(data);
            while (d > 0)
            {
                pout.println("1234567890123456789012345678901234567890123456789\n");
                d= d - 50;

            }
        }

        pout.close();

        if (pi != null)
        {
            if ("/ex4".equals(pi))
                throw new ServletException("test ex4", new Throwable());
            if ("/ex5".equals(pi))
                throw new IOException("test ex5");
            if ("/ex6".equals(pi))
                throw new UnavailableException("test ex6");
            if ("/ex7".equals(pi))
                throw new HttpException(501);
        }

        request.getInputStream().close();

    }


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