# Replace string on proxy request **URL:** \ **Category:** NGINX\ **Created:** [April 19, 2010, 6:56pm UTC](https://www.ruby-forum.com/t/replace-string-on-proxy-request/187203 "2010-04-19T18:56:00Z")\ **Posts on this page:** 5\ **Page:** 1
**Author:** ![alberto](https://www.ruby-forum.com/letter_avatar_proxy/v4/letter/a/ea5d25/32.png) [@alberto](https://www.ruby-forum.com/u/alberto)\ **Post date:** [April 19, 2010, 6:56pm UTC](https://www.ruby-forum.com/t/replace-string-on-proxy-request/187203/1 "2010-04-19T18:56:00Z")
We are using nginx as a reverse proxy, and we want to modify some strings on the body response. The problem is this one: [http://www.doman.com](http://www.doman.com) → proxied to → [http://192.168.0.0/](http://192.168.0.0/) We get into the body response links like: [http://192.168.0.0/0.gif](http://192.168.0.0/0.gif). How can we replace 192.168.0.0 by [domain.com](http://domain.com)? Thnx in advance for your help! Posted at Nginx Forum: > **[replace string on proxy request](https://forum.nginx.org/read.php?2,76692,76692#msg-76692)** > > We are using nginx as a reverse proxy, and we want to modify some strings on the body response. The problem is this one: http://www.doman.com -\> proxied to -\> http://192.168.0.0/ We get into the body response links like:... ---
**Author:** ![alberto](https://www.ruby-forum.com/letter_avatar_proxy/v4/letter/a/ea5d25/32.png) [@alberto](https://www.ruby-forum.com/u/alberto)\ **Post date:** [April 19, 2010, 7:20pm UTC](https://www.ruby-forum.com/t/replace-string-on-proxy-request/187203/2 "2010-04-19T19:20:35Z")
On Mon, Apr 19, 2010 at 12:55:10PM -0400, Alberto wrote: > We are using nginx as a reverse proxy, and we want to modify some strings on the body response. > > The problem is this one: > > [http://www.doman.com](http://www.doman.com) → proxied to → [http://192.168.0.0/](http://192.168.0.0/) > > We get into the body response links like: [http://192.168.0.0/0.gif](http://192.168.0.0/0.gif). > > How can we replace 192.168.0.0 by [domain.com](http://domain.com)? You may replace single string using ``` sub_filter http://192.168.0.0 http://www.domain.com; ``` However, it’s better to configure backend to use “[www.domain.com](http://www.domain.com)”. – Igor S. > **[Igor Sysoev](http://sysoev.ru/en/)** ---
**Author:** ![alberto](https://www.ruby-forum.com/letter_avatar_proxy/v4/letter/a/ea5d25/32.png) [@alberto](https://www.ruby-forum.com/u/alberto)\ **Post date:** [April 19, 2010, 7:22pm UTC](https://www.ruby-forum.com/t/replace-string-on-proxy-request/187203/3 "2010-04-19T19:22:21Z")
On Mon, Apr 19, 2010 at 09:19:45PM +0400, Igor S. wrote: > > How can we replace 192.168.0.0 by [domain.com](http://domain.com)? > > You may replace single string using > > ``` > sub_filter http://192.168.0.0 http://www.domain.com; > > ``` ``` sub_filter_once off; ``` – Igor S. > **[Igor Sysoev](http://sysoev.ru/en/)** ---
**Author:** ![alberto](https://www.ruby-forum.com/letter_avatar_proxy/v4/letter/a/ea5d25/32.png) [@alberto](https://www.ruby-forum.com/u/alberto)\ **Post date:** [April 20, 2010, 1:00pm UTC](https://www.ruby-forum.com/t/replace-string-on-proxy-request/187203/4 "2010-04-20T13:00:40Z")
Thnx!!! But from what I’m seeing we will have to compile nginx, as we are using the version from jdub’s ppa and it has none of them. Posted at Nginx Forum: > **[Re: replace string on proxy request](https://forum.nginx.org/read.php?2,76692,77005#msg-77005)** > > We are using nginx as a reverse proxy, and we want to modify some strings on the body response. The problem is this one: http://www.doman.com -\> proxied to -\> http://192.168.0.0/ We get into the body response links like:... ---
**Author:** ![alberto](https://www.ruby-forum.com/letter_avatar_proxy/v4/letter/a/ea5d25/32.png) [@alberto](https://www.ruby-forum.com/u/alberto)\ **Post date:** [April 20, 2010, 4:21am UTC](https://www.ruby-forum.com/t/replace-string-on-proxy-request/187203/5 "2010-04-20T04:21:28Z")
Igor S. at 2010-4-20 1:21 wrote: > > > [http://www.doman.com](http://www.doman.com) → proxied to → [http://192.168.0.0/](http://192.168.0.0/) > > > sub\_filter\_once off; If you want regular expression substitution, you can try my module: > **[Google Code Archive - Long-term storage for Google Code Project Hosting.](https://code.google.com/archive/p/substitutions4nginx)** – Weibin Y.