errorpagemanager.java
来自「RESIN 3.2 最新源码」· Java 代码 · 共 811 行 · 第 1/2 页
JAVA
811 行
out.println("<code><pre>"); /* if (app != null && app.getServer().isClosed()) { pw.println("Server is temporarily unavailable"); doStackTrace = false; } else */ if (log.isLoggable(Level.FINE) || ! Alarm.isTest()) doStackTrace = true; if (doStackTrace) { out.println("<script language='javascript' type='text/javascript'>"); out.println("function show() { document.getElementById('trace').style.display = ''; }"); out.println("</script>"); out.print("<a style=\"text-decoration\" href=\"javascript:show();\">[show]</a> "); } if (compileException instanceof DisplayableException) { DisplayableException dispExn = (DisplayableException) compileException; dispExn.print(out); } else if (compileException != null) out.println(escapeHtml(compileException.getMessage())); else out.println(escapeHtml(rootExn.toString())); if (doStackTrace) { out.println("<span id=\"trace\" style=\"display:none\">"); printStackTrace(out, lineMessage, e, rootExn, lineMap); out.println("</span>"); } /* *if (doStackTrace || log.isLoggable(Level.FINE)) { printStackTrace(out, lineMessage, e, rootExn, lineMap); } */ out.println("</pre></code>"); String version = null; if (_app == null) { } else if (_app.getServer() != null && _app.getServer().getServerHeader() != null) { version = _app.getServer().getServerHeader(); } else if (CauchoSystem.isTesting()) { } else version = com.caucho.Version.FULL_VERSION; if (version != null) { out.println("<p /><hr />"); out.println("<small>"); out.println(version); out.println("</small>"); } out.println("</body></html>"); } else { // non-development mode out.println("<html>"); out.println("<title>Server Error</title>"); out.println("<body>"); out.println("<h1>Server Error</h1>"); out.println("<p>The server is temporarily unavailable due to an"); out.println("internal error. Please notify the system administrator"); out.println("of this problem.</p>"); out.println("<pre><code>"); out.println("Date: " + new QDate().formatISO8601(Alarm.getCurrentTime())); if (Resin.getCurrent() != null) out.println("Server: '" + Resin.getCurrent().getServerId() + "'"); out.println("</code></pre>"); out.println("</html>"); out.println("</body></html>"); } String userAgent = request.getHeader("User-Agent"); if (userAgent != null && userAgent.indexOf("MSIE") >= 0) { out.print(MSIE_PADDING); } out.close(); } /** * Sends an HTTP error to the browser. * * @param code the HTTP error code * @param value a string message */ public void sendError(CauchoRequest request, CauchoResponse response, int code, String message) throws IOException { response.resetBuffer(); /* XXX: if we've already got an error, won't this just mask it? if (responseStream.isCommitted()) throw new IllegalStateException("response can't sendError() after commit"); */ response.setStatus(code, message); try { if (handleErrorStatus(request, response, code, message) || code == HttpServletResponse.SC_NOT_MODIFIED) return; response.setContentType("text/html"); PrintWriter out = response.getWriter(); out.println("<html>"); if (! response.isCommitted()) { out.print("<head><title>"); out.print(code); out.print(" "); out.print(message); out.println("</title></head>"); } out.println("<body>"); out.print("<h1>"); out.print(code); out.print(" "); out.print(message); out.println("</h1>"); if (code == HttpServletResponse.SC_NOT_FOUND) { out.println(L.l("{0} was not found on this server.", escapeHtml(request.getPageURI()))); } String version = null; if (_app == null) { } else if (_app.getServer() != null && _app.getServer().getServerHeader() != null) { version = _app.getServer().getServerHeader(); } else if (CauchoSystem.isTesting()) { } else version = com.caucho.Version.FULL_VERSION; if (version != null) { out.println("<p /><hr />"); out.println("<small>"); out.println(version); out.println("</small>"); } out.println("</body></html>"); String userAgent = request.getHeader("User-Agent"); if (userAgent != null && userAgent.indexOf("MSIE") >= 0) { out.write(MSIE_PADDING, 0, MSIE_PADDING.length); } } catch (Exception e) { log.log(Level.WARNING, e.toString(), e); } } /** * Handles an error status code. * * @return true if we've forwarded to an error page. */ private boolean handleErrorStatus(CauchoRequest request, CauchoResponse response, int code, String message) throws ServletException, IOException { if (code == HttpServletResponse.SC_OK || code == HttpServletResponse.SC_MOVED_TEMPORARILY || code == HttpServletResponse.SC_NOT_MODIFIED) return false; if (request.getRequestDepth(0) > 16) return false; else if (request.getAttribute(AbstractHttpRequest.ERROR_URI) != null) return false; response.killCache(); String location = getErrorPage(code); if (location == null) location = _defaultLocation; if (location == null && _parent != null) return _parent.handleErrorStatus(request, response, code, message); if (_app == null && _appContainer == null) return false; if (location != null && ! location.equals(request.getRequestURI())) { request.setAttribute(AbstractHttpRequest.STATUS_CODE, new Integer(code)); request.setAttribute(AbstractHttpRequest.MESSAGE, message); request.setAttribute(AbstractHttpRequest.ERROR_URI, request.getRequestURI()); if (request instanceof AbstractHttpRequest) request.setAttribute(AbstractHttpRequest.SERVLET_NAME, ((AbstractHttpRequest) request).getServletName()); try { RequestDispatcher disp = null; // can't use filters because of error pages due to filters // or security. if (_app != null) disp = _app.getRequestDispatcher(location); else if (_appContainer != null) disp = _appContainer.getRequestDispatcher(location); //disp.forward(request, this, "GET", false); if (disp != null) ((RequestDispatcherImpl) disp).error(request, response); else return false; } catch (Throwable e) { sendServletError(e, request, response); } return true; } return false; } /** * Returns the URL of an error page for the given exception. */ String getErrorPage(Throwable e) { return getErrorPage(e, Throwable.class); } /** * Returns the URL of an error page for the given exception. */ String getErrorPage(Throwable e, Class limit) { Class cl = e.getClass(); for (; cl != null; cl = cl.getSuperclass()) { String location = (String) _errorPageMap.get(cl.getName()); if (location != null) return location; if (cl == limit) break; } for (cl = e.getClass(); cl != null; cl = cl.getSuperclass()) { String name = cl.getName(); int p = name.lastIndexOf('.'); if (p > 0) { name = name.substring(p + 1); String location = (String) _errorPageMap.get(name); if (location != null) return location; } if (cl == limit) break; } return null; } /** * Returns the URL of an error page for the given exception. */ String getErrorPage(int code) { Integer key = new Integer(code); String location = (String) _errorPageMap.get(key); if (location != null) return location; return (String) _errorPageMap.get(new Integer(0)); } /** * Escapes HTML symbols in a stack trace. */ private void printStackTrace(PrintWriter out, String lineMessage, Throwable e, Throwable rootExn, LineMap lineMap) { CharArrayWriter writer = new CharArrayWriter(); PrintWriter pw = new PrintWriter(writer); if (lineMessage != null) pw.println(lineMessage); if (lineMap != null) lineMap.printStackTrace(e, pw); else ScriptStackTrace.printStackTrace(e, pw); pw.close(); char []array = writer.toCharArray(); out.print(escapeHtml(new String(array))); } /** * Escapes special symbols in a string. For example '<' becomes '<' */ private String escapeHtml(String s) { if (s == null) return null; CharBuffer cb = new CharBuffer(); int lineCharacter = 0; boolean startsWithSpace = false; for (int i = 0; i < s.length(); i++) { char ch = s.charAt(i); lineCharacter++; if (ch == '<') cb.append("<"); else if (ch == '&') cb.append("&"); /* else if (ch == '%') cb.append("%25"); */ else if (ch == '\n' || ch == '\r') { lineCharacter = 0; cb.append(ch); startsWithSpace = false; } else if (lineCharacter > 70 && ch == ' ' && ! startsWithSpace) { lineCharacter = 0; cb.append('\n'); for (; i + 1 < s.length() && s.charAt(i + 1) == ' '; i++) { } } else if (lineCharacter == 1 && (ch == ' ' || ch == '\t')) { cb.append((char) ch); startsWithSpace = true; } else cb.append(ch); } return cb.toString(); } public String toString() { return getClass().getSimpleName() + "[" + _app + "]"; } static { MSIE_PADDING = ("\n\n\n\n" + "<!--\n" + " - Unfortunately, Microsoft has added a clever new\n" + " - \"feature\" to Internet Explorer. If the text in\n" + " - an error's message is \"too small\", specifically\n" + " - less than 512 bytes, Internet Explorer returns\n" + " - its own error message. Yes, you can turn that\n" + " - off, but *surprise* it's pretty tricky to find\n" + " - buried as a switch called \"smart error\n" + " - messages\" That means, of course, that many of\n" + " - Resin's error messages are censored by default.\n" + " - And, of course, you'll be shocked to learn that\n" + " - IIS always returns error messages that are long\n" + " - enough to make Internet Explorer happy. The\n" + " - workaround is pretty simple: pad the error\n" + " - message with a big comment to push it over the\n" + " - five hundred and twelve byte minimum. Of course,\n" + " - that's exactly what you're reading right now.\n" + " -->\n").toCharArray(); }}⌨️ 快捷键说明
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