Replace Contents in NGINX

Replace Contents in NGINX

The content of a webpage contains URL or other information need to be replaced, especially when domain name changed in URL.


Use sub_filter module in NGINX to replace content.

For example,

server {
    location / {
        sub_filter '' '';
        sub_filter_once on;

        proxy_next_upstream error timeout invalid_header http_500 http_502 http_503 http_504;
        proxy_redirect off;
        proxy_buffering off;
        proxy_set_header        Host            $host;
        proxy_set_header        X-Real-IP       $remote_addr;
        proxy_set_header        X-Forwarded-For $proxy_add_x_forwarded_for;

Note: Place sub_filter at beginning of the location session

If required, also need to change host to allow server decide which page requested if it is also a NGINX server and displays page depending on the host as well.

proxy_set_header        Host  ;


Module ngx_http_sub_module
http_sub_module / sub_filter of nginx and reverse proxy not working

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