Php – Need helpful error message from mod_proxy_fcgi

apache-2.2apache-2.4PHP

When a non-existent php script is requested, mod_proxy_fcgi provides a rather useless error message, basically just saying

[proxy_fcgi:error] .... AH01071: Got error 'Primary script unknown\n'

This server is using Apache 2.4.6 (Centos 7), with php handling configured as:

<FilesMatch \.php$>
  SetHandler "proxy:fcgi://127.0.0.1:9000"
</FilesMatch>

I really would like to know the actual script name, because it may contain useful information (such as indicating a defective link, an error in a page name, or merely showing that it is just another fool hunting for a server with unprotected wp-login.php).

I tried changing LogLevel from info to debug, but then the error log was also filled with valid php script access details, which makes quite a mess of the error log, since those are not actually errors.

Is there some way to get a more useful proxy_fcgi error message which includes the actual script name for non-existent php scripts?

Best Answer

You can define ErrorLogFormat including the %L and then do the same in your CustomLog format %L

That will make Apache log a specific id which will bind an errorlog entry into the access log entry and then all you need to do is grep.

Example:

ErrorLogFormat "[%{u}t] [%-m:%l] [%L] [pid %P:tid %T] %7F: %E: [client\ %a] %M% ,\ referer\ %{Referer}i"

LogFormat "%h %l %u [%L] %t \"%r\" %>s \"%{Referer}i\" \"%{User-Agent}i\"" combined

So next time, when you see an error, you check the ID in it and grep the access.log for the same id

Related Solutions

Php – Ubuntu PHP5/Apache2 – Displaying 500 error instead of error message

If the script has a parse error that prevents it from running, this also prevents it from changing a PHP setting.

Php htaccess environment variables php-fpm mod_proxy_fcgi apache 2.4

In your VirtualHost directive:

<Directory /home/dir/public_html/www.site.com>
    AllowOverride All
    Options FollowSymLinks
    Require all granted
    RewriteEngine On
    RewriteCond %{REQUEST_FILENAME} ^/((.*\.php)(/.*)?)$
    RewriteCond %2 -f
    RewriteRule . fcgi://127.0.0.1:9001/%1 [L,P]
    RewriteOptions Inherit
</Directory>

Site is fast, drupal works, other files work, environment variables passed. DO NOT USE ProxyPass OR ProxyPassMatch!!!! It will not pass environment variables and break some php packages. Some have shown you can use LocationMatch and Interpolation but this seems to only work for ajp:// and not fcgi:// !!!

Unfortunately, this sets the user not to what is set in the php-fpm pool configuration but to the apache user and group. That is another question though so I will mark this resolved. I have to change writable folders to the apache user and group, which is sort of secure if you think about it, but it is also non sequitur and has some weird issues.

Best Answer

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Php – Ubuntu PHP5/Apache2 – Displaying 500 error instead of error message

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