Java tutorial
// ======================================================================== // $Id: Dump.java,v 1.42 2005/12/21 23:14:38 gregwilkins Exp $ // Copyright 1996-2004 Mort Bay Consulting Pty. Ltd. // ------------------------------------------------------------------------ // Licensed under the Apache License, Version 2.0 (the "License"); // you may not use this file except in compliance with the License. // You may obtain a copy of the License at // http://www.apache.org/licenses/LICENSE-2.0 // Unless required by applicable law or agreed to in writing, software // distributed under the License is distributed on an "AS IS" BASIS, // WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. // See the License for the specific language governing permissions and // limitations under the License. // ======================================================================== package org.openqa.jetty.servlet; import java.io.IOException; import java.io.OutputStream; import java.io.PrintWriter; import java.lang.reflect.Field; import java.util.Enumeration; import java.util.Locale; import javax.servlet.ServletConfig; import javax.servlet.ServletException; import javax.servlet.ServletRequest; import javax.servlet.ServletRequestWrapper; import javax.servlet.UnavailableException; import javax.servlet.http.Cookie; import javax.servlet.http.HttpServlet; import javax.servlet.http.HttpServletRequest; import javax.servlet.http.HttpServletRequestWrapper; import javax.servlet.http.HttpServletResponse; import org.apache.commons.logging.Log; import org.openqa.jetty.log.LogFactory; import org.openqa.jetty.html.Break; import org.openqa.jetty.html.Font; import org.openqa.jetty.html.Heading; import org.openqa.jetty.html.Page; import org.openqa.jetty.html.Select; import org.openqa.jetty.html.Table; import org.openqa.jetty.html.TableForm; import org.openqa.jetty.http.HttpException; import org.openqa.jetty.util.Loader; import org.openqa.jetty.util.LogSupport; /* ------------------------------------------------------------ */ /** Dump Servlet Request. * */ public class Dump extends HttpServlet { private static Log log = LogFactory.getLog(Dump.class); /* ------------------------------------------------------------ */ String pageType; /* ------------------------------------------------------------ */ public void init(ServletConfig config) throws ServletException { super.init(config); } /* ------------------------------------------------------------ */ public void doPost(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException { doGet(request, response); } /* ------------------------------------------------------------ */ public void doGet(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException { 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: ").cell().right(); table.addCell("" + request.getMethod()); table.newRow(); table.addHeading("getContentLength: ").cell().right(); table.addCell(Integer.toString(request.getContentLength())); table.newRow(); table.addHeading("getContentType: ").cell().right(); table.addCell("" + request.getContentType()); table.newRow(); table.addHeading("getCharacterEncoding: ").cell().right(); table.addCell("" + request.getCharacterEncoding()); table.newRow(); table.addHeading("getRequestURI: ").cell().right(); table.addCell("" + request.getRequestURI()); table.newRow(); table.addHeading("getRequestURL: ").cell().right(); table.addCell("" + request.getRequestURL()); table.newRow(); table.addHeading("getContextPath: ").cell().right(); table.addCell("" + request.getContextPath()); table.newRow(); table.addHeading("getServletPath: ").cell().right(); table.addCell("" + request.getServletPath()); table.newRow(); table.addHeading("getPathInfo: ").cell().right(); table.addCell("" + request.getPathInfo()); table.newRow(); table.addHeading("getPathTranslated: ").cell().right(); table.addCell("" + request.getPathTranslated()); table.newRow(); table.addHeading("getQueryString: ").cell().right(); table.addCell("" + request.getQueryString()); table.newRow(); table.addHeading("getProtocol: ").cell().right(); table.addCell("" + request.getProtocol()); table.newRow(); table.addHeading("getScheme: ").cell().right(); table.addCell("" + request.getScheme()); table.newRow(); table.addHeading("getServerName: ").cell().right(); table.addCell("" + request.getServerName()); table.newRow(); table.addHeading("getServerPort: ").cell().right(); table.addCell("" + Integer.toString(request.getServerPort())); table.newRow(); table.addHeading("getLocalName: ").cell().right(); table.addCell("" + request.getLocalName()); table.newRow(); table.addHeading("getLocalAddr: ").cell().right(); table.addCell("" + request.getLocalAddr()); table.newRow(); table.addHeading("getLocalPort: ").cell().right(); table.addCell("" + Integer.toString(request.getLocalPort())); table.newRow(); table.addHeading("getRemoteUser: ").cell().right(); table.addCell("" + request.getRemoteUser()); table.newRow(); table.addHeading("getRemoteAddr: ").cell().right(); table.addCell("" + request.getRemoteAddr()); table.newRow(); table.addHeading("getRemoteHost: ").cell().right(); table.addCell("" + request.getRemoteHost()); table.newRow(); table.addHeading("getRemotePort: ").cell().right(); table.addCell("" + request.getRemotePort()); table.newRow(); table.addHeading("getRequestedSessionId: ").cell().right(); table.addCell("" + request.getRequestedSessionId()); table.newRow(); table.addHeading("isSecure(): ").cell().right(); table.addCell("" + request.isSecure()); table.newRow(); table.addHeading("isUserInRole(admin): ").cell().right(); table.addCell("" + request.isUserInRole("admin")); table.newRow(); table.addHeading("getLocale: ").cell().right(); table.addCell("" + request.getLocale()); Enumeration locales = request.getLocales(); while (locales.hasMoreElements()) { table.newRow(); table.addHeading("getLocales: ").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 + ": ").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 + ": ").cell().right(); table.addCell(request.getParameter(name)); String[] values = request.getParameterValues(name); if (values == null) { table.newRow(); table.addHeading(name + " Values: ").cell().right(); table.addCell("NULL!!!!!!!!!"); } else if (values.length > 1) { for (int i = 0; i < values.length; i++) { table.newRow(); table.addHeading(name + "[" + i + "]: ").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() + ": ").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 + ": ").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 + ": ").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 + ": ").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 + ": ").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 + ": ").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(): ").cell().right(); table.addCell("" + this.getClass().getResource(res)); table.newRow(); table.addHeading("this.getClass().getClassLoader(): ").cell().right(); table.addCell("" + this.getClass().getClassLoader().getResource(res)); table.newRow(); table.addHeading("Thread.currentThread().getContextClassLoader(): ").cell().right(); table.addCell("" + Thread.currentThread().getContextClassLoader().getResource(res)); table.newRow(); table.addHeading("getServletContext(): ").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: Drst<br/>"); page.add("HTML reference: Dürst<br/>"); page.add("Decimal (252) 8859-1: Dürst<br/>"); page.add("Hex (xFC) 8859-1: Dürst<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(); } /* ------------------------------------------------------------ */ public String getServletInfo() { return "Dump Servlet"; } /* ------------------------------------------------------------ */ public synchronized void destroy() { log.debug("Destroyed"); } /* ------------------------------------------------------------ */ private String getURI(HttpServletRequest request) { String uri = (String) request.getAttribute("javax.servlet.forward.request_uri"); if (uri == null) uri = request.getRequestURI(); return uri; } /* ------------------------------------------------------------ */ private static String toString(Object o) { if (o == null) return null; if (o.getClass().isArray()) { StringBuffer sb = new StringBuffer(); Object[] array = (Object[]) o; for (int i = 0; i < array.length; i++) { if (i > 0) sb.append("\n"); sb.append(array.getClass().getComponentType().getName()); sb.append("["); sb.append(i); sb.append("]="); sb.append(toString(array[i])); } return sb.toString(); } else return o.toString(); } }