Error_page and log_not_found in nginx 0.7.8

I think I’m either misunderstanding the purpose of the log_not_found
directive or maybe there is a bug in nginx 0.7.8. In May 2008 Igor
recommended [1] the following configuration snippet to hand off all
requests for non-existing files to PHP:

location / {
error_page 404 = /index.php;
}

But this creates an entry in my error_log for each request that is
handed off to PHP. Michael S. then pointed me to the log_not_found
directive, but adding “log_not_found off;” to the configuration file
does not seem to have any effect, no matter where I put it (http, server
or location block).

The error I get originates from src/http/modules/ngx_http_index_module.c
and reads

2008/08/11 10:04:17 [error] 5887#0: *1 “/doc/root/artikel/index.php” is
not found (2: No such file or directory), client: 127.0.0.1, server:
www.example.org, request: “GET /artikel/ HTTP/1.1”, host:
www.example.org”, referrer: “http://www.example.org/

What am I doing wrong?

I could, of course, change the error_log directive to only log critical
events, but I fear that I would miss some (more) important errors then.

Kind regards
Steffen W.

[1] http://article.gmane.org/gmane.comp.web.nginx.english/4739
[2]
http://michaelshadle.com/2008/05/01/wordpress-nginx-rewrite-rules-stop-the-insanity/

On Mon, Aug 11, 2008 at 10:20:36AM +0200, Steffen W. wrote:

handed off to PHP. Michael S. then pointed me to the log_not_found
www.example.org”, referrer: “http://www.example.org/

What am I doing wrong?

I could, of course, change the error_log directive to only log critical
events, but I fear that I would miss some (more) important errors then.

The attached patch should fix the bug.

Igor S. wrote:

not found (2: No such file or directory), client: 127.0.0.1, server:
www.example.org, request: “GET /artikel/ HTTP/1.1”, host:
www.example.org”, referrer: “http://www.example.org/

What am I doing wrong?

I could, of course, change the error_log directive to only log critical
events, but I fear that I would miss some (more) important errors then.

The attached patch should fix the bug.

It does, thank you very much! :slight_smile:

Steffen

Igor S. wrote:

not found (2: No such file or directory), client: 127.0.0.1, server:
www.example.org, request: “GET /artikel/ HTTP/1.1”, host:
www.example.org”, referrer: “http://www.example.org/

What am I doing wrong?

I could, of course, change the error_log directive to only log critical
events, but I fear that I would miss some (more) important errors then.

The attached patch should fix the bug.

I still have one problem when using this method: First I noticed that
the redirected requests were missing the GET data, but I was able to
solve this problem by using

error_page 404 = /index.php?$args;

instead of

error_page 404 = /index.php;

But POST data is missing, too. At least the $_POST array in PHP is empty
when the request is redirected by the error_page directive. However, the
cookies somehow make it through. How can I solve this problem?

I have reverted to the following configuration for now:

if (-f $request_filename) {
break;
}
rewrite ^ /index.php last;

Kind regards
Steffen W.

On 8/12/08, Steffen W. [email protected] wrote:

But POST data is missing, too. At least the $_POST array in PHP is empty
when the request is redirected by the error_page directive. However, the
cookies somehow make it through. How can I solve this problem?

I can see the differerence I think - cookies are sent on each request,
GET is sent via the query string… However, I would expect that
error_page works like an internal rewrite so it should maintain the
same POST/etc. and be transparent to the end user.

Igor could this be allowed? error_page should be treated like an
internal rewrite in my opinion.

On Tue, Aug 12, 2008 at 12:58:03PM +0200, Steffen W. wrote:

}
2008/08/11 10:04:17 [error] 5887#0: *1 “/doc/root/artikel/index.php” is

But POST data is missing, too. At least the $_POST array in PHP is empty
when the request is redirected by the error_page directive. However, the
cookies somehow make it through. How can I solve this problem?

I have reverted to the following configuration for now:

if (-f $request_filename) {
break;
}
rewrite ^ /index.php last;

Try the attached patch. The POST method will be changed to GET while
internal redirection, but the POST body will remain. Probably $_POST
array will contain the body data.

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