Databases
StackOverflow2013
Postsdbo
POUse a servlet for custom HTTP errors? (Tomcat)
 

Note that there are some explanatory texts on larger screens.

plurals
  1. POUse a servlet for custom HTTP errors? (Tomcat)
    primarykey
    data
    text
    <p>I'm using Struts 1.3.10 to run a site. Everything works well, but I'd like to add some custom error handling for the HTTP 404 and other such errors. Everywhere I look, I see that the custom error pages should be jsp's (e.g. 404.jsp) that are defined in the Web.xml file.</p> <p>In my app, I've created a global error handler which uses an error handling servlet to display a dynamic error page for other servlet errors (e.g. runtime, bus logic, etc.). Would there be anything wrong with redirecting to this servlet from a 404.jsp (as defined in the Web.xml)? the idea would be to hit the 404.jsp, get redirected to the servlet do the logging I want, then show the error page. I'd like to log what caused the error in the first place, such as the IP, the requested URI, generate list of IPs to block, etc. </p> <p>I did try this, and in principle it works... trouble is that I sometimes get illegal state errors ... I'm wondering if the approach is wrong or this is just a bad idea??? I get a lot of 404's from IP's trolling for misconfigured PHP sites it seems (see below).</p> <p>Here is a sample error:</p> <pre><code> :: HTTP 404 ERROR -- page not found. URL requested = /scripts/setup.php 2012-01-09 20:23:39,375 | ERROR | (ApplicationDispatcher.java:691) - Servlet.service() for servlet jsp threw exception java.lang.IllegalStateException at org.apache.catalina.connector.ResponseFacade.sendRedirect(ResponseFacade.java:433) at org.apache.struts.taglib.logic.RedirectTag.doRedirect(RedirectTag.java:314) at org.apache.struts.taglib.logic.RedirectTag.doEndTag(RedirectTag.java:268) at org.apache.jsp._404_jsp._jspx_meth_logic_005fredirect_005f0(_404_jsp.java:118) at org.apache.jsp._404_jsp._jspService(_404_jsp.java:74) at org.apache.jasper.runtime.HttpJspBase.service(HttpJspBase.java:98) at javax.servlet.http.HttpServlet.service(HttpServlet.java:729) at org.apache.jasper.servlet.JspServletWrapper.service(JspServletWrapper.java:369) at org.apache.jasper.servlet.JspServlet.serviceJspFile(JspServlet.java:308) at org.apache.jasper.servlet.JspServlet.service(JspServlet.java:259) at javax.servlet.http.HttpServlet.service(HttpServlet.java:729) at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:269) at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:188) at org.apache.catalina.core.ApplicationDispatcher.invoke(ApplicationDispatcher.java:659) at org.apache.catalina.core.ApplicationDispatcher.processRequest(ApplicationDispatcher.java:459) at org.apache.catalina.core.ApplicationDispatcher.doForward(ApplicationDispatcher.java:395) at org.apache.catalina.core.ApplicationDispatcher.forward(ApplicationDispatcher.java:311) at org.apache.catalina.core.StandardHostValve.custom(StandardHostValve.java:364) at org.apache.catalina.core.StandardHostValve.status(StandardHostValve.java:285) at org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:137) at org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:117) at org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:108) at org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:174) at org.apache.jk.server.JkCoyoteHandler.invoke(JkCoyoteHandler.java:200) at org.apache.jk.common.HandlerRequest.invoke(HandlerRequest.java:291) at org.apache.jk.common.ChannelSocket.invoke(ChannelSocket.java:775) at org.apache.jk.common.ChannelSocket.processConnection(ChannelSocket.java:704) at org.apache.jk.common.ChannelSocket$SocketConnection.runIt(ChannelSocket.java:897) at org.apache.tomcat.util.threads.ThreadPool$ControlRunnable.run(ThreadPool.java:689) at java.lang.Thread.run(Thread.java:619) Jan 9, 2012 8:23:39 PM org.apache.catalina.core.StandardHostValve custom SEVERE: Exception Processing ErrorPage[errorCode=404, location=/404.jsp] org.apache.jasper.JasperException at org.apache.jasper.servlet.JspServletWrapper.handleJspException(JspServletWrapper.java:498) at org.apache.jasper.servlet.JspServletWrapper.service(JspServletWrapper.java:405) at org.apache.jasper.servlet.JspServlet.serviceJspFile(JspServlet.java:308) at org.apache.jasper.servlet.JspServlet.service(JspServlet.java:259) at javax.servlet.http.HttpServlet.service(HttpServlet.java:729) at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:269) at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:188) at org.apache.catalina.core.ApplicationDispatcher.invoke(ApplicationDispatcher.java:659) at org.apache.catalina.core.ApplicationDispatcher.processRequest(ApplicationDispatcher.java:459) at org.apache.catalina.core.ApplicationDispatcher.doForward(ApplicationDispatcher.java:395) at org.apache.catalina.core.ApplicationDispatcher.forward(ApplicationDispatcher.java:311) at org.apache.catalina.core.StandardHostValve.custom(StandardHostValve.java:364) at org.apache.catalina.core.StandardHostValve.status(StandardHostValve.java:285) at org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:137) at org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:117) at org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:108) at org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:174) at org.apache.jk.server.JkCoyoteHandler.invoke(JkCoyoteHandler.java:200) at org.apache.jk.common.HandlerRequest.invoke(HandlerRequest.java:291) at org.apache.jk.common.ChannelSocket.invoke(ChannelSocket.java:775) at org.apache.jk.common.ChannelSocket.processConnection(ChannelSocket.java:704) at org.apache.jk.common.ChannelSocket$SocketConnection.runIt(ChannelSocket.java:897) at org.apache.tomcat.util.threads.ThreadPool$ControlRunnable.run(ThreadPool.java:689) at java.lang.Thread.run(Thread.java:619) </code></pre>
    singulars
    1. PO
      singulars
      1. PTAnswer
    1. This table or related slice is empty.
    1. PTQuestion
    1. This table or related slice is empty.
    1. USuser991945
    plurals
    1. PL
      singulars
      1. LTLinked
    1. This table or related slice is empty.
    1. This table or related slice is empty.
    1. PO
      singulars
      1. PTAnswer
    1. This table or related slice is empty.
    1. This table or related slice is empty.
 

Querying!

 
Guidance
A row detail

Detail views are divided into sections. All the information in the data section comes from columns in the selected row. The other sections display data from other, related rows.

Related data can be related in a to-one or a to-many fashion. Captions of data related in a to-many fashion link to a list view showing a filtered view of the table.

Try moving around until you find a non-empty to-many entry and click on the label to get to one. You can move back to the root by clicking on the database name in the header.

SQuiL has stopped working due to an internal error.

If you are curious you may find further information in the browser console, which is accessible through the devtools (F12).

Reload