📄 env.java
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/* * Copyright 1998-1999 Caucho Technology. All rights reserved. */import java.io.*;import java.util.*;import javax.servlet.http.*;import javax.servlet.*;/** * The Env servlet prints the values of most of the Servlet API. */public class Env extends GenericServlet { public void service( ServletRequest req, ServletResponse res ) throws ServletException, IOException { HttpServletRequest request = (HttpServletRequest) req; HttpServletResponse response = (HttpServletResponse) res; /* * Get a PrintWriter to write the text. */ response.setContentType("text/html"); PrintWriter pw = response.getWriter(); /* * Print the header. */ pw.println("<html>"); pw.println("<head><title>Environment Script</title></head>"); pw.println("<body bgcolor=#ffffff>"); pw.println(); /* * And the request URL */ pw.println("<h1>Requested URL:</h1>"); pw.println("<pre>"); pw.println(HttpUtils.getRequestURL(request)); pw.println("</pre>"); /* * Print request variables */ printRequest(pw, request); /* * Print form values */ printForm(pw, request); /* * Print session values */ printSession(pw, request); /* * Print application values */ printApplication(pw, request); /* * Print servlet init parameters */ printServletInit(pw); /* * Print application init parameters */ printApplicationInit(pw); /* * Write the footer */ pw.println("</body>"); pw.println("</html>"); } /** * Write the properties of the request object */ private void printRequest(PrintWriter pw, HttpServletRequest request) throws IOException { pw.println("<h1>Request Information:</h1>"); pw.println("<table>"); pw.print("<tr><td>Request method <td>"); pw.println(request.getMethod()); pw.print("<tr><td>Request URI <td>"); pw.println(request.getRequestURI()); pw.print("<tr><td>Request protocol <td>"); pw.println(request.getProtocol()); pw.print("<tr><td>Servlet path <td>"); pw.println(request.getServletPath()); pw.print("<tr><td>Path info <td>"); pw.println(request.getPathInfo()); pw.print("<tr><td>Path translated <td>"); pw.println(request.getPathTranslated()); pw.print("<tr><td>Query string <td>"); pw.println(request.getQueryString()); pw.print("<tr><td>Content length <td>"); pw.println(request.getContentLength()); pw.print("<tr><td>Content type <td>"); pw.println(request.getContentType()); pw.print("<tr><td>Server name <td>"); pw.println(request.getServerName()); pw.print("<tr><td>Server port <td>"); pw.println(request.getServerPort()); pw.print("<tr><td>Remote user <td>"); pw.println(request.getRemoteUser()); pw.print("<tr><td>Remote address <td>"); pw.println(request.getRemoteAddr()); pw.print("<tr><td>Remote host <td>"); pw.println(request.getRemoteHost()); pw.print("<tr><td>Authorization scheme<td>"); pw.println(request.getAuthType()); pw.println("</table>"); /* * Write the HTTP request headers. */ pw.println("<h1>Request Headers:</h1>"); pw.println("<table>"); Enumeration e = request.getHeaderNames(); while (e.hasMoreElements()) { String name = (String) e.nextElement(); pw.print("<tr><td>"); pw.print(name); pw.print("<td>"); pw.println(request.getHeader(name)); } pw.println("</table>"); /* * Write any request attributes */ pw.println("<h1>Request Attributes:</h1>"); pw.println("<table>"); e = request.getAttributeNames(); while (e.hasMoreElements()) { String name = (String) e.nextElement(); pw.print("<tr><td>"); pw.print(name); pw.print("<td>"); pw.println(request.getAttribute(name)); } pw.println("</table>"); } /** * Write any form values */ private void printForm(PrintWriter pw, HttpServletRequest request) throws IOException { pw.println("<h1>Form Values:</h1>"); pw.println("<table>"); Enumeration e = request.getParameterNames(); while (e.hasMoreElements()) { String name = (String) e.nextElement(); pw.print("<tr><td>"); pw.print(name); pw.print("<td>"); pw.println(request.getParameter(name)); } pw.println("</table>"); } /** * Write session properties */ private void printSession(PrintWriter pw, HttpServletRequest request) throws IOException { HttpSession session = request.getSession(false); if (session == null) { pw.println("<h1>No Session</h1>"); return; } pw.println("<h1>Session Information:</h1>"); pw.println("<table>"); pw.print("<tr><td>Id<td>"); pw.println(session.getId()); pw.print("<tr><td>isNew<td>"); pw.println(session.isNew()); pw.println("</table>"); pw.println("<h1>Session Variables:</h1>"); pw.println("<table>"); String []names = session.getValueNames(); for (int i = 0; i < names.length; i++) { String name = names[i]; pw.print("<tr><td>"); pw.print(name); pw.print("<td>"); pw.println(session.getValue(name)); } pw.println("</table>"); } /** * Write application properties */ private void printApplication(PrintWriter pw, HttpServletRequest req) throws IOException { ServletContext application = getServletContext(); pw.println("<h1>Application Information:</h1>"); pw.println("<table>"); pw.print("<tr><td>Major Version<td>"); pw.println(application.getMajorVersion()); pw.print("<tr><td>Minor Version<td>"); pw.println(application.getMinorVersion()); pw.print("<tr><td>Server Info<td>"); pw.println(application.getServerInfo()); pw.print("<tr><td>Real Path (of pathinfo)<td>"); pw.println(application.getRealPath(req.getPathInfo())); pw.print("<tr><td>Mime-type (of pathinfo)<td>"); pw.println(application.getMimeType(req.getPathInfo())); pw.println("</table>"); pw.println("<h1>Application Variables:</h1>"); pw.println("<table>"); Enumeration e = application.getAttributeNames(); while (e.hasMoreElements()) { String name = (String) e.nextElement(); pw.print("<tr><td>"); pw.print(name); pw.print("<td>"); pw.println(application.getAttribute(name)); } pw.println("</table>"); } /** * Write servlet init parameters */ private void printServletInit(PrintWriter pw) throws IOException { Enumeration e = getInitParameterNames(); if (! e.hasMoreElements()) return; pw.println("<h1>Servlet Init Parameters:</h1>"); pw.println("<table>"); while (e.hasMoreElements()) { String name = (String) e.nextElement(); pw.print("<tr><td>"); pw.print(name); pw.print("<td>"); pw.println(getInitParameter(name)); } pw.println("</table>"); } /** * Write application init parameters */ private void printApplicationInit(PrintWriter pw) throws IOException { ServletContext app = getServletContext(); Enumeration e = app.getInitParameterNames(); if (! e.hasMoreElements()) return; pw.println("<h1>Application Init Parameters:</h1>"); pw.println("<table>"); while (e.hasMoreElements()) { String name = (String) e.nextElement(); pw.print("<tr><td>"); pw.print(name); pw.print("<td>"); pw.println(app.getInitParameter(name)); } pw.println("</table>"); }}⌨️ 快捷键说明
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