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Re: So is "rewrite_by_lua" also evil?

October 15, 2011 06:46AM
On 15/10/2011 13:33, agentzh wrote:
> On Sat, Oct 15, 2011 at 6:16 PM, Eugaia<ngx.eugaia@gmail.com> wrote:
>> On 15/10/2011 12:40, agentzh wrote:
>>> Okay, I must say that ngx_rewrite's "last" won't affect rewrite_by_lua
>>> because rewrite_by_lua is not part of that module (and there's no
>>> known way to achieve that).
>> You could achieve that now by creating a dummy variable, and instead of
>> using a new handler for the rewrite by code, you wrap the code around the
>> setby lua code. It would waste a few cycles, since it would be setting a
>> variable unnecessarily, but would have the benefit of not slowing down the
>> execution of code that didn't use rewrite_by, since it wouldn't be adding an
>> extra handler to process for all the other requests.
>>
> I do not fully grok your approach but I'd ask first: will this
> approach allow subrequests, internal redirection, non-blocking sleep,
> and all the other fancy stuffs?
If you were just wrapping around set_var, then no. It would only be
able to handle non-reentrant code, just like setby.

In order to have reentrant code, it would need to have a generic layer
that would be able to jump in/out of the script engine (and handle
re-calling the script engine post subrequest etc). The rewrite handler
would also need to be re-written to handle re-entering the script engine.

The advantage of having a generic rewrite re-entrant layer, though,
would be that set_var would also be able to accept subrequests etc
(assuming you used that to base setby on).

Marcus.

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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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