Hi,
I wanted to ask if the same regex used in multiple conditions is the
same
cached-compiled version?
Eg I need to validate the all the (sub)request params before sending it
upstream:
location /foo {
if ($time !~ /(\d\d):(\d\d):(\d\d)/) { return 400; }
if ($arg_time !~ /(\d\d):(\d\d):(\d\d)/) { return 400; }
}
#note that in the real app, I’ll have lots of repeated regex for email,
phone, used in every if directive
location /bar {
if ($arg_time !~ /(\d\d):(\d\d):(\d\d)/) { return 400; }
set_form_input $form_time time_finished;
if ($form_time !~ /(\d\d):(\d\d):(\d\d)/) { return 400; }
}
What I’m trying to do is send the params to redis with its lua scripting
engine handling the pre-validated request.
Redis is single-process while nginx can have multiple workers … so its
only fitting to let nginx do validation for redis 
Cheers
On Thu, Jul 21, 2011 at 10:18:06PM +0800, David Yu wrote:
if ($arg_time !~ /(\d\d):(\d\d):(\d\d)/) { return 400; }
if ($form_time !~ /(\d\d):(\d\d):(\d\d)/) { return 400; }
}
What I’m trying to do is send the params to redis with its lua scripting
engine handling the pre-validated request.
Redis is single-process while nginx can have multiple workers … so its
only fitting to let nginx do validation for redis 
No, each regex is compiled separately.
–
Igor S.
On Thu, Jul 21, 2011 at 10:43 PM, Igor S. [email protected] wrote:
if ($time !~ /(\d\d):(\d\d):(\d\d)/) { return 400; }
set_form_input $form_time time_finished;
Thanks for the quick reply.
I’m thinking maybe the nginx map can act as the regex cache for the same
ones.
set $map_regex_time $arg_time
if ( !$map_regex_time) return { 400; }
set_form_input $map_regex_time time_finished;
if (! $map_regex_time) return { 400; }
Since I’ll literally have hundreds of fields using the same regex, this
might help?
On Thu, Jul 21, 2011 at 10:53:51PM +0800, David Yu wrote:
location /foo {
if (! $map_regex_time) return { 400; }
Since I’ll literally have hundreds of fields using the same regex, this
might help?
I do not understand the issue.
–
Igor S.
On Thu, Jul 21, 2011 at 10:53 PM, David Yu [email protected]
wrote:
Eg I need to validate the all the (sub)request params before sending it
phone, used in every if directive
engine handling the pre-validated request.
if (!$map_regex_time) { return 400; }
set_form_input $map_regex_time time_finished;
if (!$map_regex_time) { return 400; }
Oops. Copy-paste err
On Fri, Jul 22, 2011 at 2:10 AM, Igor S. [email protected] wrote:
it
email,
What I’m trying to do is send the params to redis with its lua
ones.
I do not understand the issue.
map $map_arg_time $map_regex_time {
~/(\d\d):(\d\d):(\d\d)/ 1;
}
location /foo {
set $map_arg_time $arg_time
if ( !$map_regex_time ) return { 400; }
set_form_input $map_arg_time time_finished;
if ( !$map_regex_time ) return { 400; }
}
Since I’ll literally have hundreds of fields using the same regex for
validation, this might help?
If there are better ways to do validation, please do tell.
Cheers