Stripping out query parameter?


#1

Hello,

I’m trying to rewrite some urls that are incorrect. An example would
be:

www.mysite.com/test.php?x=123&extra=yes

I want to rewrite this to

www.mysite.com/test.php?x=123

I’m trying something like the following, without luck:

     if ($args ~* ^(.*)(&?)extra=yes$) {
         set $stripped_params = $1;
         rewrite ^(.*)$ $1$stripped_params permanent;
     }

Any thoughts? I’m running 0.6.31. Thanks!


#2

On Tue, Mar 03, 2009 at 12:08:11AM -0800, Neil S. wrote:

I’m trying something like the following, without luck:

     if ($args ~* ^(.*)(&?)extra=yes$) {
         set $stripped_params = $1;
         rewrite ^(.*)$ $1$stripped_params permanent;
  •          rewrite ^(.*)$ $1$stripped_params permanent;
    
  •          rewrite ^(.*)$ $1$stripped_params? permanent;
    

to omit original arguments.


#3

Hello!

On Tue, Mar 03, 2009 at 12:08:11AM -0800, Neil S. wrote:

I’m trying something like the following, without luck:

     if ($args ~* ^(.*)(&?)extra=yes$) {
         set $stripped_params = $1;
         rewrite ^(.*)$ $1$stripped_params permanent;
  •          rewrite ^(.*)$ $1$stripped_params permanent;
    
  •          rewrite ^(.*)$ $1?$stripped_params? permanent;
    
     }

Any thoughts? I’m running 0.6.31. Thanks!

  1. Missing ‘?’ to separate uri path and arguments. Note that $args
    doesn’t contain leading ‘?’.

  2. Without trailing ‘?’ nginx will append original arguments to
    resulting rewrite uri.

Maxim D.


#4

Hmmm, I’m getting:

nginx -t -c /etc/nginx/nginx.conf

2009/03/03 05:05:07 [emerg] 10550#0: invalid number of arguments in
“set” directive in /etc/nginx/nginx.conf:170
2009/03/03 05:05:07 [emerg] 10550#0: the configuration file
/etc/nginx/nginx.conf test failed

Not sure what the error is here. Also, not sure if this rule belongs
at the server level, or within my "location / " section . . .


#5

Hello!

On Tue, Mar 03, 2009 at 03:08:06AM -0800, Neil S. wrote:

Hmmm, I’m getting:

nginx -t -c /etc/nginx/nginx.conf

2009/03/03 05:05:07 [emerg] 10550#0: invalid number of arguments in
“set” directive in /etc/nginx/nginx.conf:170
2009/03/03 05:05:07 [emerg] 10550#0: the configuration file
/etc/nginx/nginx.conf test failed

Not sure what the error is here. Also, not sure if this rule belongs
at the server level, or within my "location / " section . . .

[…]

š š š š šif ($args ~* ^(.*)(&?)extra=yes$) {
š š š š š š šset $stripped_params = $1;

  •             set $stripped_params = $1;
    
  •             set $stripped_params $1;
    

Maxim D.


#6

Ok, that seemed to mostly do what I wanted, thanks!

A couple things -

I want to avoid writing the trailing ‘?’ if there is no leftover
parameters to pass through:
www.mysite.com/test.php?extra=yes goes to www.mysite.com/test.php?
instead of www.mysite.com/test.php

Similarly, with multiple parameters, it seems to leave the final ‘&’ on
the end.

Do I need to create special rules for each of these? Or, can I add
logic to test the content of $stripped_params and set the rewrite
accordingly?

Also, I’m not clear, where is it most appropriate to place this rule -
under server, or under location / ?

2009/3/3 Maxim D. removed_email_address@domain.invalid: