Get URL of page requested that caused a 404

Question

How would I get the URL of the page that was requested that caused the 404 error?

For example, I type I go to http://example.com/path/does/not/exist/index.jsp I already have a custom 404 page but how would I go about retrieving the URL mentioned above so that I can display it with a message similar to "The url http://example.com/path/does/not/exist/index.jsp does not exist"?

possible duplicate of [JSP / Servlet HTTP 404 error handling](http://stackoverflow.com/questions/3336501/jsp-servlet-http-404-error-handling) — BalusC, Feb 09 '11 at 18:53

score 10 · Accepted Answer · edited Feb 09 '11 at 18:47

10

If forward was used to go to the error page, you can obtain the original request URL by

request.getAttribute("javax.servlet.forward.request_uri")

or by EL

${requestScope['javax.servlet.forward.request_uri']}

edited Feb 09 '11 at 18:47

BalusC

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answered Feb 09 '11 at 17:33

Bozho

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Thanks but I'm looking more for like the example I gave, without forwarding – alexcoco Feb 09 '11 at 18:20
2

Indeed, an `` is per definition shown by a forward. – BalusC Feb 09 '11 at 18:49
@BalusC Thanks, I hadn't realized that it's forwarded to the 404 page. @Bozho Worked perfectly, thanks! – alexcoco Feb 10 '11 at 01:14

score 0 · Answer 2 · answered Mar 31 '14 at 00:54

I'm using JDK 8 and GlassFish 4, and

request.getAttribute("javax.servlet.forward.request_uri")

always returned null for me. What eventually did work was

request.getAttribute("javax.servlet.error.request_uri")

I'm not sure why the attribute name is different, but in case the name I listed doesn't work on your setup, here's the code I used to find it...

    Enumeration<String> names = request.getAttributeNames();

    while(names.hasMoreElements()){
        String name = names.nextElement();
        Object attr = request.getAttribute(name);

        System.out.println("Req:  "+name + " : "+attr);
    }

This was for a project I worked on many years ago but thank you for the update! — alexcoco, Mar 31 '14 at 04:32

Get URL of page requested that caused a 404

2 Answers2

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