title: nginx cache. How to define list of urls to cache only?
body: <p>I have big list of urls to cache, for example:</p>
  
  <pre><code>http://example.com?a=1&amp;b=1
  http://example.com?a=2&amp;b=1
  etc...
  </code></pre>
  
  <p>There are no rule to describe these, only by direct listing.
  I want my nginx to cache only urls I defined in this list and ignore caching for other GET parameters. Is there a way?</p>