viewfileservlet.java
来自「RESIN 3.2 最新源码」· Java 代码 · 共 232 行
JAVA
232 行
/* * Copyright (c) 1998-2003 Caucho Technology -- all rights reserved * * This file is part of Resin(R) Open Source * * Each copy or derived work must preserve the copyright notice and this * notice unmodified. * * Resin Open Source is free software; you can redistribute it and/or modify * it under the terms of the GNU General Public License as published by * the Free Software Foundation; either version 2 of the License, or * (at your option) any later version. * * Resin Open Source is distributed in the hope that it will be useful, * but WITHOUT ANY WARRANTY; without even the implied warranty of * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE, or any warranty * of NON-INFRINGEMENT. See the GNU General Public License for more * details. * * You should have received a copy of the GNU General Public License * along with Resin Open Source; if not, write to the * Free SoftwareFoundation, Inc. * 59 Temple Place, Suite 330 * Boston, MA 02111-1307 USA * * @author Sam */package com.caucho.doc;import com.caucho.util.*;import com.caucho.vfs.Path;import com.caucho.vfs.ReadStream;import com.caucho.vfs.Vfs;import javax.servlet.GenericServlet;import javax.servlet.ServletConfig;import javax.servlet.ServletContext;import javax.servlet.ServletException;import javax.servlet.ServletRequest;import javax.servlet.ServletResponse;import javax.servlet.http.HttpServletRequest;import java.io.IOException;import java.io.PrintWriter;import java.util.logging.Logger;import java.util.regex.Pattern;/** * Servlet to view a source file, with optional emphasis based on regular * expressions. */public class ViewFileServlet extends GenericServlet { static private final Logger log = Logger.getLogger(ViewFileServlet.class.getName()); static final L10N L = new L10N(ViewFileServlet.class); static private final String PARAM_CONTEXTPATH = "contextpath"; static private final String PARAM_SERVLETPATH = "servletpath"; static private final String PARAM_FILE = "file"; static private final String PARAM_RE_MARKER = "re-marker"; static private final String PARAM_RE_START = "re-start"; static private final String PARAM_RE_END = "re-end"; ServletContext _context; public void init(ServletConfig config) throws ServletException { super.init(config); _context = config.getServletContext(); } public void service(ServletRequest request, ServletResponse response) throws ServletException, IOException { try { viewFile(response.getWriter(), request); } catch (Exception ex) { throw new ServletException(ex); } } private void viewFile(PrintWriter out, ServletRequest request) throws Exception { String file = getFileName(request); Path path = getFilePath(request); if (path != null) { String re_mrk_str = request.getParameter(PARAM_RE_MARKER); String re_beg_str = request.getParameter(PARAM_RE_START); String re_end_str = request.getParameter(PARAM_RE_END); Pattern re_mrk = re_mrk_str == null || re_mrk_str.length() == 0 ? null : Pattern.compile(re_mrk_str); Pattern re_beg = re_beg_str == null || re_beg_str.length() == 0 ? null : Pattern.compile(re_beg_str); Pattern re_end = re_end_str == null || re_end_str.length() == 0 ? null : Pattern.compile(re_end_str); /* * write the verbatim source to the browser. * if re.start (and optionally re.end) are specified, * highlight the corresponding code sections */ out.println("<html>"); out.println("<head>"); out.print("<title>"); out.print(Html.escapeHtml(file)); out.println("</title>"); out.println("<style type='text/css'>"); out.println(" .code-highlight { color: #1764FF; }"); out.println(" .face-xmlelement { color: #003DB8; font-weight: bold }"); out.println("</style>"); out.println("</head>"); out.println("<body bgcolor=white>"); out.print("<code>"); out.print("<b>"); out.print(Html.escapeHtml(file)); out.print("</b>"); out.print("</code>"); out.println("<p>"); ReadStream is; try { is = path.openRead(); } catch (java.io.FileNotFoundException ex) { out.println("<font color='red'><b>File not found: " + Html.escapeHtml(path.getPath()) + "</b></font>"); out.println("</body>"); out.println("</html>"); return; } String line; out.print("<pre>"); boolean h = false; // true if currently highlighting boolean m = false; // true if marked while ((line = is.readln()) != null) { // check for marker if (!m && re_mrk != null && re_mrk.matcher(line).matches()) { out.print("<a name='code-highlight'></a>"); m = true; } // check for highlighting begin if (!h && re_beg != null && re_beg.matcher(line).matches()) { h = true; out.print("<b class='code-highlight'>"); if (!m && re_mrk == null) { out.print("<a name='code-highlight'></a>"); m = true; } } // send string out // handle '<' character and '>' character int l = line.length(); for (int i = 0; i < l; i++) { int ch = line.charAt(i); if (ch == '<') { if (h) out.print("<span class='face-xmlelement'>"); out.print("<"); } else if (ch == '>') { out.print(">"); if (h) out.print("</span>"); } else out.print((char) ch); } out.println(); // check for highlighting end if (h && (re_end == null || (re_end != null && re_end.matcher(line).matches()))) { h = false; out.print("</b>"); } } is.close(); if (h) out.print("</b>"); out.println("</pre>"); out.println("</body>"); out.println("</html>"); return; } } private String getFileName(ServletRequest request) { String f = request.getParameter(PARAM_FILE); if (f != null && f.length() > 0 && f.indexOf("..") < 0) { return f; } return null; } private Path getFilePath(ServletRequest request) { String cp = request.getParameter(PARAM_CONTEXTPATH); String sp = request.getParameter(PARAM_SERVLETPATH); String f = getFileName(request); Path pwd = Vfs.lookup().createRoot(); if (f != null) { ServletContext ctx = _context; String requestContext = ((HttpServletRequest) request).getContextPath(); if (cp != null && cp.startsWith(requestContext)) cp = cp.substring(requestContext.length()); CharBuffer cb = new CharBuffer(); if (cp != null) cb.append(cp); cb.append('/'); cb.append(f); // return pwd.lookup(ctx.getRealPath(cb.toString())); return pwd.lookup(cb.toString()); } return null; }}⌨️ 快捷键说明
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