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

If anyone is using the previous answer with several different cookies in the response the correct regex is:

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

or more general usage:

map $http_cookie $auth_header {
    default "";
    "~*yourCookieName=(?[^;]+)" "the value you wanna set $variable";
  }