NGINX 沒有一致地設置 Cache-Control 標頭

我無法讓 NGINX 根據 mime 類型正確發送記憶體控制標頭。它適用於某些類型，但不適用於其他類型。我錯過了什麼？

在我的site.conf文件中，我有：

map $sent_http_content_type $expires {
   default                    off;
   text/html                  epoch;
   text/css                    1h;
   text/javascript             1h;
   application/javascript      1h;
#    ~image/                    1h;
   image/webp                  1h;
   image/png                   2h;
   ~font/                      1h;
}
server {
   server_name  ...;
   ...
   root /var/www/site;
   index index.html;

   expires $expires;   
   location / {
       proxy_pass http://127.0.0.1:5001;
       proxy_http_version 1.1;
       proxy_set_header Upgrade $http_upgrade;
       proxy_set_header Connection 'upgrade';
       proxy_set_header Host $host;
       proxy_cache_bypass $http_upgrade;
       proxy_set_header X-Real-IP       $remote_addr;
       proxy_set_header X-Forwarded-For $proxy_add_x_forwarded_for;
   }
   ...
}

使用圖像效果很好。它也適用於~image/模式。

curl -I https://site.tld/images/image.webp
HTTP/2 200 
server: nginx/1.18.0 (Ubuntu)
date: Thu, 22 Sep 2022 14:37:16 GMT
content-type: image/webp
content-length: 9488
accept-ranges: bytes
expires: Thu, 22 Sep 2022 15:37:16 GMT
cache-control: max-age=3600
strict-transport-security: max-age=2628000; includeSubDomains

$ curl -I https://site.tld/images/image.png
HTTP/2 200 
server: nginx/1.18.0 (Ubuntu)
date: Thu, 22 Sep 2022 14:37:25 GMT
content-type: image/png
content-length: 53676
accept-ranges: bytes
expires: Thu, 22 Sep 2022 16:37:25 GMT
cache-control: max-age=7200
strict-transport-security: max-age=2628000; includeSubDomains

但它拒絕使用 CSS 或 javascript…

$ curl -I https://site.tld/css/bootstrap.min.css
HTTP/2 200 
server: nginx/1.18.0 (Ubuntu)
date: Thu, 22 Sep 2022 14:43:39 GMT
content-type: text/css; charset=utf-8
content-length: 162264
vary: Accept-Encoding
accept-ranges: bytes
strict-transport-security: max-age=2628000; includeSubDomains

$ curl -I https://site.tld/js/bootstrap.min.js
HTTP/2 200 
server: nginx/1.18.0 (Ubuntu)
date: Thu, 22 Sep 2022 14:43:53 GMT
content-type: text/javascript; charset=utf-8
content-length: 62563
vary: Accept-Encoding
accept-ranges: bytes
strict-transport-security: max-age=2628000; includeSubDomains

該應用程序是一個已編譯的 Go 應用程序，其中包含編譯並通過代理提供的圖像資產。但是所有的資源都被編譯進去了，圖片和 CSS 等等。那麼為什麼它對某些類型有效，而對其他類型無效呢？

您嘗試設置記憶體的內容類型具有字元集。這也應該是規則的一部分：

map $sent_http_content_type $expires {
   default                    off;
   text/html                  epoch;
   text/css                    1h;
   text/javascript             1h;
   application/javascript      1h;
#    ~image/                    1h;
   image/webp                  1h;
   image/png                   2h;
   ~font/                      1h;
   "text/ccs; charset=utf-8"   1h; 
   "text/javascript; charset=utf-8" 1h;
}

否則它將落入default設置之下。

引用自：https://serverfault.com/questions/1111336