How to extract some value from cookie in nginx

Question

I am new to Nginx and hope to get some help.

I want to extract certain data (certain fields set by my PHP scripts) from browser cookie in nginx so that I can log it. If

Answer 1

Here's an example to extract an HttpOnly cookie and pass it on to a RESTful api as an OAuth Bearer token:

http {

  map $http_cookie $auth_header {
    default "";
    "~*OAuth.AccessToken=(?.+)" "Bearer $token";
  }

  server {
    listen                443 ssl;

    ssl_certificate       /etc/nginx/certs/nginx.crt;
    ssl_certificate_key   /etc/nginx/certs/nginx.key;

    proxy_set_header      Authorization $auth_header;

    location / {
      proxy_pass          https://rest-api-host.domain.com/;
    }

  }

}