# Eval
The module allows saving subrequest response bodies in variables.
## Installation
To [install](https://en.angie.software//angie/docs/installation/index.md#install-packages) the module, use one of the
following packages:
- Angie: `angie-module-eval`
- Angie PRO: `angie-pro-module-eval`
## Loading the Module
Load the module in the `main{}` context:
```nginx
load_module modules/ngx_http_eval_module.so;
```
## Example Configuration
```nginx
server {
listen 80;
server_name localhost;
location / {
eval_subrequest_in_memory off;
eval_override_content_type text/plain;
eval_buffer_size 4k;
eval $res {
rewrite ^(/eval_.*/)(.*)$ /$2 break;
proxy_pass http://127.0.0.1:8081;
}
if ($res ~ "access denied") {
return 403 $res\n;
}
proxy_pass http://127.0.0.1:8082;
}
}
server {
listen 8081;
if ($arg_user != 'Legal') {
return 403 "access denied";
}
return 200 OK;
}
server {
listen 8082;
location / {
root /usr/share/angie/html;
}
}
```
## Additional Information
Detailed documentation and source code are available at:
[https://github.com/openresty/nginx-eval-module](https://github.com/openresty/nginx-eval-module)