/*
* Licensed to the Apache Software Foundation (ASF) under one
* or more contributor license agreements. See the NOTICE file
* distributed with this work for additional information
* regarding copyright ownership. The ASF licenses this file
* to you 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.apache.jena.fuseki.server;
import static java.lang.String.format ;
import java.io.ByteArrayOutputStream ;
import java.io.IOException ;
import java.io.OutputStreamWriter ;
import java.io.PrintWriter ;
import java.io.StringWriter ;
import java.io.Writer ;
import javax.servlet.http.HttpServletRequest ;
import javax.servlet.http.HttpServletResponse ;
import org.apache.jena.fuseki.Fuseki ;
import org.apache.jena.fuseki.http.HttpSC ;
import org.eclipse.jetty.http.HttpHeaders ;
import org.eclipse.jetty.http.HttpMethods ;
import org.eclipse.jetty.http.MimeTypes ;
import org.eclipse.jetty.server.HttpConnection ;
import org.eclipse.jetty.server.Request ;
import org.eclipse.jetty.server.handler.ErrorHandler ;
public class FusekiErrorHandler extends ErrorHandler
{
/* ------------------------------------------------------------ */
@Override
public void handle(String target, Request baseRequest, HttpServletRequest request, HttpServletResponse response) throws IOException
{
HttpConnection connection = HttpConnection.getCurrentConnection();
connection.getRequest().setHandled(true);
String method = request.getMethod();
if(!method.equals(HttpMethods.GET) && !method.equals(HttpMethods.POST) && !method.equals(HttpMethods.HEAD))
return;
response.setContentType(MimeTypes.TEXT_PLAIN_UTF_8) ;
response.setHeader(HttpHeaders.CACHE_CONTROL, "must-revalidate,no-cache,no-store") ;
ByteArrayOutputStream bytes = new ByteArrayOutputStream(1024) ;
//String writer = IO.UTF8(null) ;
Writer writer = new OutputStreamWriter(bytes, "UTF-8") ;
handleErrorPage(request, writer, connection.getResponse().getStatus(), connection.getResponse().getReason());
if ( ! Fuseki.VERSION.equalsIgnoreCase("development") )
{
writer.write("\n") ;
writer.write("\n") ;
writer.write(format("Fuseki - version %s (Build date: %s)\n", Fuseki.VERSION, Fuseki.BUILD_DATE)) ;
}
writer.flush();
response.setContentLength(bytes.size()) ;
// Copy :-(
response.getOutputStream().write(bytes.toByteArray()) ;
writer.close() ;
}
/* ------------------------------------------------------------ */
@Override
protected void handleErrorPage(HttpServletRequest request, Writer writer, int code, String message)
throws IOException
{
if ( message == null )
message = HttpSC.getMessage(code) ;
writer.write(format("Error %d: %s\n", code, message)) ;
Throwable th = (Throwable)request.getAttribute("javax.servlet.error.exception");
while(th!=null)
{
writer.write("\n");
StringWriter sw = new StringWriter();
PrintWriter pw = new PrintWriter(sw);
th.printStackTrace(pw);
pw.flush();
writer.write(sw.getBuffer().toString());
writer.write("\n");
th = th.getCause();
}
}
}