GTmetrix利用浏览器缓存

Question

我尝试将其添加到htaccess中，但是当我去GTMetrix并检查我的网站性能时，我仍然获得“利用浏览器缓存”的F。

我的htaccess文件中有此文件，但似乎没有缓存。知道我错过了什么吗？

谢谢

<IfModule mod_expires.c>
      ExpiresActive on
    
    # Perhaps better to whitelist expires rules? Perhaps.
      ExpiresDefault                          "access plus 1 month"
    
    # cache.appcache needs re-requests in FF 3.6 (thanks Remy ~Introducing HTML5)
      ExpiresByType text/cache-manifest       "access plus 0 seconds"
    
    # Your document html 
      ExpiresByType text/html                 "access plus 0 seconds"
      
    # Data
      ExpiresByType text/xml                  "access plus 0 seconds"
      ExpiresByType application/xml           "access plus 0 seconds"
      ExpiresByType application/json          "access plus 0 seconds"
    
    # Feed
      ExpiresByType application/rss+xml       "access plus 1 hour"
      ExpiresByType application/atom+xml      "access plus 1 hour"
    
    # Favicon (cannot be renamed)
      ExpiresByType image/x-icon              "access plus 1 week" 
    
    # Media: images, video, audio
      ExpiresByType image/gif                 "access plus 1 month"
      ExpiresByType image/png                 "access plus 1 month"
      ExpiresByType image/jpg                 "access plus 1 month"
      ExpiresByType image/jpeg                "access plus 1 month"
      ExpiresByType video/ogg                 "access plus 1 month"
      ExpiresByType audio/ogg                 "access plus 1 month"
      ExpiresByType video/mp4                 "access plus 1 month"
      ExpiresByType video/webm                "access plus 1 month"
      
    # HTC files  (css3pie)
      ExpiresByType text/x-component          "access plus 1 month"
      
    # Webfonts
      ExpiresByType font/truetype             "access plus 1 month"
      ExpiresByType font/opentype             "access plus 1 month"
      ExpiresByType application/x-font-woff   "access plus 1 month"
      ExpiresByType image/svg+xml             "access plus 1 month"
      ExpiresByType application/vnd.ms-fontobject "access plus 1 month"
        
    # CSS and JavaScript
      ExpiresByType text/css                  "access plus 1 year"
      ExpiresByType application/javascript    "access plus 1 year"
      
      <IfModule mod_headers.c>
        Header append Cache-Control "public"
      </IfModule>
      
    </IfModule>