X-Git-Url: https://code.wpia.club/?p=gigi.git;a=blobdiff_plain;f=lib%2Fjetty%2Forg%2Feclipse%2Fjetty%2Fserver%2Fhandler%2FErrorHandler.java;fp=lib%2Fjetty%2Forg%2Feclipse%2Fjetty%2Fserver%2Fhandler%2FErrorHandler.java;h=b1af5208a39aad479a13589315de81e6dc3c54f7;hp=0000000000000000000000000000000000000000;hb=73ef54a38e3930a1a789cdc6b5fa23cdd4c9d086;hpb=515007c7c1351045420669d65b59c08fa46850f2 diff --git a/lib/jetty/org/eclipse/jetty/server/handler/ErrorHandler.java b/lib/jetty/org/eclipse/jetty/server/handler/ErrorHandler.java new file mode 100644 index 00000000..b1af5208 --- /dev/null +++ b/lib/jetty/org/eclipse/jetty/server/handler/ErrorHandler.java @@ -0,0 +1,319 @@ +// +// ======================================================================== +// Copyright (c) 1995-2014 Mort Bay Consulting Pty. Ltd. +// ------------------------------------------------------------------------ +// All rights reserved. This program and the accompanying materials +// are made available under the terms of the Eclipse Public License v1.0 +// and Apache License v2.0 which accompanies this distribution. +// +// The Eclipse Public License is available at +// http://www.eclipse.org/legal/epl-v10.html +// +// The Apache License v2.0 is available at +// http://www.opensource.org/licenses/apache2.0.php +// +// You may elect to redistribute this code under either of these licenses. +// ======================================================================== +// + +package org.eclipse.jetty.server.handler; + +import java.io.IOException; +import java.io.PrintWriter; +import java.io.StringWriter; +import java.io.Writer; +import java.nio.ByteBuffer; + +import javax.servlet.ServletException; +import javax.servlet.http.HttpServletRequest; +import javax.servlet.http.HttpServletResponse; + +import org.eclipse.jetty.http.HttpFields; +import org.eclipse.jetty.http.HttpHeader; +import org.eclipse.jetty.http.HttpMethod; +import org.eclipse.jetty.http.HttpStatus; +import org.eclipse.jetty.http.MimeTypes; +import org.eclipse.jetty.server.Dispatcher; +import org.eclipse.jetty.server.Request; +import org.eclipse.jetty.server.Response; +import org.eclipse.jetty.server.Server; +import org.eclipse.jetty.util.BufferUtil; +import org.eclipse.jetty.util.ByteArrayISO8859Writer; +import org.eclipse.jetty.util.log.Log; +import org.eclipse.jetty.util.log.Logger; + +/* ------------------------------------------------------------ */ +/** Handler for Error pages + * An ErrorHandler is registered with {@link ContextHandler#setErrorHandler(ErrorHandler)} or + * {@link org.eclipse.jetty.server.Server#addBean(Object)}. + * It is called by the HttpResponse.sendError method to write a error page via {@link #handle(String, Request, HttpServletRequest, HttpServletResponse)} + * or via {@link #badMessageError(int, String, HttpFields)} for bad requests for which a dispatch cannot be done. + * + */ +public class ErrorHandler extends AbstractHandler +{ + private static final Logger LOG = Log.getLogger(ErrorHandler.class); + public final static String ERROR_PAGE="org.eclipse.jetty.server.error_page"; + + boolean _showStacks=true; + boolean _showMessageInTitle=true; + String _cacheControl="must-revalidate,no-cache,no-store"; + + /* ------------------------------------------------------------ */ + /* + * @see org.eclipse.jetty.server.server.Handler#handle(javax.servlet.http.HttpServletRequest, javax.servlet.http.HttpServletResponse, int) + */ + @Override + public void handle(String target, Request baseRequest, HttpServletRequest request, HttpServletResponse response) throws IOException + { + String method = request.getMethod(); + if (!HttpMethod.GET.is(method) && !HttpMethod.POST.is(method) && !HttpMethod.HEAD.is(method)) + { + baseRequest.setHandled(true); + return; + } + + if (this instanceof ErrorPageMapper) + { + String error_page=((ErrorPageMapper)this).getErrorPage(request); + if (error_page!=null && request.getServletContext()!=null) + { + String old_error_page=(String)request.getAttribute(ERROR_PAGE); + if (old_error_page==null || !old_error_page.equals(error_page)) + { + request.setAttribute(ERROR_PAGE, error_page); + + Dispatcher dispatcher = (Dispatcher) request.getServletContext().getRequestDispatcher(error_page); + try + { + if(dispatcher!=null) + { + dispatcher.error(request, response); + return; + } + LOG.warn("No error page "+error_page); + } + catch (ServletException e) + { + LOG.warn(Log.EXCEPTION, e); + return; + } + } + } + } + + baseRequest.setHandled(true); + response.setContentType(MimeTypes.Type.TEXT_HTML_8859_1.asString()); + if (_cacheControl!=null) + response.setHeader(HttpHeader.CACHE_CONTROL.asString(), _cacheControl); + ByteArrayISO8859Writer writer= new ByteArrayISO8859Writer(4096); + String reason=(response instanceof Response)?((Response)response).getReason():null; + handleErrorPage(request, writer, response.getStatus(), reason); + writer.flush(); + response.setContentLength(writer.size()); + writer.writeTo(response.getOutputStream()); + writer.destroy(); + } + + /* ------------------------------------------------------------ */ + protected void handleErrorPage(HttpServletRequest request, Writer writer, int code, String message) + throws IOException + { + writeErrorPage(request, writer, code, message, _showStacks); + } + + /* ------------------------------------------------------------ */ + protected void writeErrorPage(HttpServletRequest request, Writer writer, int code, String message, boolean showStacks) + throws IOException + { + if (message == null) + message=HttpStatus.getMessage(code); + + writer.write("\n\n"); + writeErrorPageHead(request,writer,code,message); + writer.write("\n"); + writeErrorPageBody(request,writer,code,message,showStacks); + writer.write("\n\n\n"); + } + + /* ------------------------------------------------------------ */ + protected void writeErrorPageHead(HttpServletRequest request, Writer writer, int code, String message) + throws IOException + { + writer.write("\n"); + writer.write("Error "); + writer.write(Integer.toString(code)); + + if (_showMessageInTitle) + { + writer.write(' '); + write(writer,message); + } + writer.write("\n"); + } + + /* ------------------------------------------------------------ */ + protected void writeErrorPageBody(HttpServletRequest request, Writer writer, int code, String message, boolean showStacks) + throws IOException + { + String uri= request.getRequestURI(); + + writeErrorPageMessage(request,writer,code,message,uri); + if (showStacks) + writeErrorPageStacks(request,writer); + writer.write("
Powered by Jetty://
\n"); + } + + /* ------------------------------------------------------------ */ + protected void writeErrorPageMessage(HttpServletRequest request, Writer writer, int code, String message,String uri) + throws IOException + { + writer.write("

HTTP ERROR "); + writer.write(Integer.toString(code)); + writer.write("

\n

Problem accessing "); + write(writer,uri); + writer.write(". Reason:\n

    ");
+        write(writer,message);
+        writer.write("

"); + } + + /* ------------------------------------------------------------ */ + protected void writeErrorPageStacks(HttpServletRequest request, Writer writer) + throws IOException + { + Throwable th = (Throwable)request.getAttribute("javax.servlet.error.exception"); + while(th!=null) + { + writer.write("

Caused by:

");
+            StringWriter sw = new StringWriter();
+            PrintWriter pw = new PrintWriter(sw);
+            th.printStackTrace(pw);
+            pw.flush();
+            write(writer,sw.getBuffer().toString());
+            writer.write("
\n"); + + th =th.getCause(); + } + } + + /* ------------------------------------------------------------ */ + /** Bad Message Error body + *

Generate a error response body to be sent for a bad message. + * In this case there is something wrong with the request, so either + * a request cannot be built, or it is not safe to build a request. + * This method allows for a simple error page body to be returned + * and some response headers to be set. + * @param status The error code that will be sent + * @param reason The reason for the error code (may be null) + * @param fields The header fields that will be sent with the response. + * @return The content as a ByteBuffer, or null for no body. + */ + public ByteBuffer badMessageError(int status, String reason, HttpFields fields) + { + if (reason==null) + reason=HttpStatus.getMessage(status); + fields.put(HttpHeader.CONTENT_TYPE,MimeTypes.Type.TEXT_HTML_8859_1.asString()); + return BufferUtil.toBuffer("

Bad Message " + status + "

reason: " + reason + "
"); + } + + /* ------------------------------------------------------------ */ + /** Get the cacheControl. + * @return the cacheControl header to set on error responses. + */ + public String getCacheControl() + { + return _cacheControl; + } + + /* ------------------------------------------------------------ */ + /** Set the cacheControl. + * @param cacheControl the cacheControl header to set on error responses. + */ + public void setCacheControl(String cacheControl) + { + _cacheControl = cacheControl; + } + + /* ------------------------------------------------------------ */ + /** + * @return True if stack traces are shown in the error pages + */ + public boolean isShowStacks() + { + return _showStacks; + } + + /* ------------------------------------------------------------ */ + /** + * @param showStacks True if stack traces are shown in the error pages + */ + public void setShowStacks(boolean showStacks) + { + _showStacks = showStacks; + } + + /* ------------------------------------------------------------ */ + /** + * @param showMessageInTitle if true, the error message appears in page title + */ + public void setShowMessageInTitle(boolean showMessageInTitle) + { + _showMessageInTitle = showMessageInTitle; + } + + + /* ------------------------------------------------------------ */ + public boolean getShowMessageInTitle() + { + return _showMessageInTitle; + } + + /* ------------------------------------------------------------ */ + protected void write(Writer writer,String string) + throws IOException + { + if (string==null) + return; + + for (int i=0;i' : + writer.write(">"); + break; + + default: + if (Character.isISOControl(c) && !Character.isWhitespace(c)) + writer.write('?'); + else + writer.write(c); + } + } + } + + /* ------------------------------------------------------------ */ + public interface ErrorPageMapper + { + String getErrorPage(HttpServletRequest request); + } + + /* ------------------------------------------------------------ */ + public static ErrorHandler getErrorHandler(Server server, ContextHandler context) + { + ErrorHandler error_handler=null; + if (context!=null) + error_handler=context.getErrorHandler(); + if (error_handler==null && server!=null) + error_handler = server.getBean(ErrorHandler.class); + return error_handler; + } +}