# Capture in if - escaping depends on location bug **URL:** \ **Category:** NGINX\ **Created:** [March 22, 2012, 3:34am UTC](https://www.ruby-forum.com/t/capture-in-if-escaping-depends-on-location-bug/218128 "2012-03-22T03:34:27Z")\ **Posts on this page:** 1\ **Page:** 1
**Author:** ![luislavena](https://www.ruby-forum.com/letter_avatar_proxy/v4/letter/l/0ea827/32.png) [@luislavena](https://www.ruby-forum.com/u/luislavena)\ **Post date:** [March 22, 2012, 3:34am UTC](https://www.ruby-forum.com/t/capture-in-if-escaping-depends-on-location-bug/218128/1 "2012-03-22T03:34:27Z")
I am capturing some data in if, and then redirecting on what was captured. The problem is, that captured data is escaped if url contains “%” char, and may be others, and do not escaped if it does not. I have simple config: Having simple config ``` location / { set $out "http://example.com/?a=b&c=d%"; if ( $out ~ "(.*)" ){ set $z $1; rewrite ^ $z redirect; } ``` Making 2 requests: telnet 127.0.0.1 80 Trying 127.0.0.1… Connected to 127.0.0.1. Escape character is ‘^]’. GET / HTTP/1.0 Host: [my.ru](http://my.ru) HTTP/1.1 302 Moved Temporarily Server: nginx/1.0.14 Date: Thu, 22 Mar 2012 02:20:14 GMT Content-Type: text/html Content-Length: 161 Connection: close Location: [Example Domain](http://example.com/?a=b&c=d%25) 302 Found # 302 Found * * * nginx/1.0.14 Connection closed by foreign host. telnet 127.0.0.1 80 Trying 127.0.0.1… Connected to 127.0.0.1. Escape character is ‘^]’. GET /% HTTP/1.0 Host: [my.ru](http://my.ru) HTTP/1.1 302 Moved Temporarily Server: nginx/1.0.14 Date: Thu, 22 Mar 2012 02:21:00 GMT Content-Type: text/html Content-Length: 161 Connection: close Location: [Example Domain](http://example.com/?a=b%26c=d%25) 302 Found # 302 Found * * * nginx/1.0.14 Connection closed by foreign host. Expected the same location as in first request, but got another. Tested on nginx-1.0.14 , nginx-1.0.6 . Posted at Nginx Forum: > **[capture in if - escaping depends on location bug](https://forum.nginx.org/read.php?2,224209,224209#msg-224209)** > > I am capturing some data in if, and then redirecting on what was captured. The problem is, that captured data is escaped if url contains "%" char, and may be others, and do not escaped if it does not. I have simple config: Having simple...