53 lines
1.8 KiB
Java
53 lines
1.8 KiB
Java
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Servlet error handler
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package com.ack.web.servlet;
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import java.io.IOException;
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import java.io.PrintWriter;
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import javax.servlet.ServletException;
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import javax.servlet.http.HttpServlet;
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import javax.servlet.http.HttpServletRequest;
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import javax.servlet.http.HttpServletResponse;
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/**
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* Map the location of the servlet to handle at error
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* with the supplied status code
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*
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<web-app>
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...
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<error-page>
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<error-code>404</error-code>
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<location>/servlet/com.ack.web.servlet.ServletErrorHandler</location>
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</error-page>
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</web-app>
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*/
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public class ServletErrorHandler extends HttpServlet {
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public void doGet( HttpServletRequest req, HttpServletResponse res )
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throws ServletException, IOException {
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res.setContentType( "text/html" );
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PrintWriter pw = res.getWriter();
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String statusCode = getRequestAttribute( req,
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"javax.servlet.error.status_code",
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"status code not supplied" );
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String errorMsg = getRequestAttribute( req,
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"javax.servlet.error.message",
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"error msg not supplied" );
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pw.println( "<h1>Error Code: " + statusCode + "</h1>" );
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pw.println( "<h2>Error Message: " + errorMsg + "</h1>" );
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pw.println( "<p>Problem accessing: " + req.getRequestURI() + "</p>" );
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pw.println( "<p><hr><p>" );
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pw.println( new java.util.Date( System.currentTimeMillis() ) );
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}
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private String getRequestAttribute( HttpServletRequest req,
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String name,
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String defaultValue ) {
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Object value = req.getAttribute( name );
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return ( value != null ) ? value.toString() : defaultValue;
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}
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}
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