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Re: So is "rewrite_by_lua" also evil?

agentzh
October 11, 2011 08:18PM
On Wed, Oct 12, 2011 at 12:03 AM, Nginx User <nginx@nginxuser.net> wrote:
> Anyway, when I have the following (simplified) in firewall.default ....
>
> if ($http_user_agent ~* libwww ) {
>        return 403;
> }
>
> ... everything is fine. When a php request is made, libwww user agents
> are denied and others get the php output.
>

You're using the "~*" operator here and that means "case insensitive
match", see http://wiki.nginx.org/HttpCoreModule#location

> When I use the following (simplified) rewrite_by_lua equivalent instead .....
>
> rewrite_by_lua '
>        if ngx.var.http_user_agent == "libwww" then
>                ngx.exit(ngx.HTTP_FORBIDDEN)
>        end
> ';
>

Note that you're using "==" here in Lua which is exact string comparison :)

> The php file is downloaded. Obviously I don't have the "libwww" when
> testing so I suppose the lua "if" block is skipped at which point the
> physical php file is found and sent to the user as is and the
> proxy_pass directive is not run.
>

Which version of ngx_lua are you using? Please show me your "nginx -V"
output? And which OS are you using? I've tested your example with
ngx_lua git master HEAD on Slackware Linux x86_64 and do not have any
issues :)

Also, enabling --with-debug in your nginx build and show me the
relevant sections of your error.log on the debug error log level will
be helpful too :)

Regards,
-agentzh

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Subject Author Posted

So is "rewrite_by_lua" also evil?

Nginx User October 11, 2011 12:04PM

Re: So is "rewrite_by_lua" also evil?

agentzh October 11, 2011 08:18PM

Re: So is "rewrite_by_lua" also evil?

Nginx User October 12, 2011 12:14AM

Re: So is "rewrite_by_lua" also evil?

agentzh October 12, 2011 12:22AM

Re: So is "rewrite_by_lua" also evil?

Nginx User October 12, 2011 12:50AM

Re: So is "rewrite_by_lua" also evil?

Nginx User October 12, 2011 02:38PM

Re: So is "rewrite_by_lua" also evil?

Nginx User October 12, 2011 05:36PM

Re: So is "rewrite_by_lua" also evil?

agentzh October 12, 2011 10:08PM

Re: So is "rewrite_by_lua" also evil?

agentzh October 12, 2011 11:58PM

Re: So is "rewrite_by_lua" also evil?

Nginx User October 13, 2011 12:36AM

Re: So is "rewrite_by_lua" also evil?

Nginx User October 13, 2011 12:34AM

Re: So is "rewrite_by_lua" also evil?

agentzh October 13, 2011 12:56AM

Re: So is "rewrite_by_lua" also evil?

Eugaia October 14, 2011 07:02AM

Re: So is "rewrite_by_lua" also evil?

Nginx User October 14, 2011 07:42AM

Re: So is "rewrite_by_lua" also evil?

agentzh October 12, 2011 09:36PM

Re: So is "rewrite_by_lua" also evil?

Nginx User October 13, 2011 12:32AM

Re: So is "rewrite_by_lua" also evil?

Nginx User October 13, 2011 12:54AM

Re: So is "rewrite_by_lua" also evil?

agentzh October 13, 2011 02:02AM

Re: So is "rewrite_by_lua" also evil?

Nginx User October 13, 2011 12:12PM

Re: So is "rewrite_by_lua" also evil?

Nginx User October 13, 2011 08:18PM

Re: So is "rewrite_by_lua" also evil?

Nginx User October 14, 2011 09:28AM

Re: So is "rewrite_by_lua" also evil?

Nginx User October 14, 2011 03:26PM

Re: So is "rewrite_by_lua" also evil?

Nginx User October 14, 2011 03:26PM

Re: So is "rewrite_by_lua" also evil?

Nginx User October 14, 2011 04:42PM

Re: So is "rewrite_by_lua" also evil?

agentzh October 15, 2011 02:38AM

Re: So is "rewrite_by_lua" also evil?

Nginx User October 15, 2011 04:48AM

Re: So is "rewrite_by_lua" also evil?

agentzh October 15, 2011 05:42AM

Re: So is "rewrite_by_lua" also evil?

Nginx User October 15, 2011 05:58AM

Re: So is "rewrite_by_lua" also evil?

agentzh October 15, 2011 06:08AM

Re: So is "rewrite_by_lua" also evil?

Nginx User October 15, 2011 07:38AM

Re: So is "rewrite_by_lua" also evil?

agentzh October 15, 2011 09:24AM

Re: So is "rewrite_by_lua" also evil?

Nginx User October 15, 2011 10:22AM

Re: So is "rewrite_by_lua" also evil?

agentzh October 16, 2011 12:30AM

Re: So is "rewrite_by_lua" also evil?

agentzh October 16, 2011 07:12AM

Re: So is "rewrite_by_lua" also evil?

Nginx User October 16, 2011 11:44AM

Re: So is "rewrite_by_lua" also evil?

Eugaia October 15, 2011 06:26AM

Re: So is "rewrite_by_lua" also evil?

Nginx User October 15, 2011 07:08AM

Re: So is "rewrite_by_lua" also evil?

Eugaia October 15, 2011 06:18AM

Re: So is "rewrite_by_lua" also evil?

agentzh October 15, 2011 06:34AM

Re: So is "rewrite_by_lua" also evil?

Eugaia October 15, 2011 06:46AM

Re: So is "rewrite_by_lua" also evil?

agentzh October 15, 2011 07:10AM

Re: So is "rewrite_by_lua" also evil?

Eugaia October 15, 2011 07:40AM

Re: So is "rewrite_by_lua" also evil?

agentzh October 16, 2011 12:18AM

Re: So is "rewrite_by_lua" also evil?

agentzh October 14, 2011 09:28PM

Re: So is "rewrite_by_lua" also evil?

Nginx User October 15, 2011 04:34AM

Re: So is "rewrite_by_lua" also evil?

agentzh October 13, 2011 08:38PM

Re: So is "rewrite_by_lua" also evil?

Nginx User October 14, 2011 04:32AM

Re: So is "rewrite_by_lua" also evil?

MyName October 12, 2011 06:23AM

Re: So is "rewrite_by_lua" also evil?

Nginx User October 12, 2011 06:32AM



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