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NGINX 不一致地设置 Cache-Control 标头

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NGINX 不一致地设置 Cache-Control 标头

我无法让 NGINX 根据 MIME 类型正确发送缓存控制标头。它适用于某些类型，但对其他类型无效。我遗漏了什么？

在我的site.conf档案中我有：

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;
    }
    ...
}

使用图像效果很好。它也可以与~image/图案配合使用。

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

但它拒绝与 CSS 或 javascript 一起工作......

$ 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

该应用程序是一个已编译的 Go 应用，其中的图像资源已编译并通过代理提供。但所有资源都已编译，包括图像和 CSS 等。那么为什么它对某些类型有效，而对其他类型无效呢？

答案1

您尝试设置缓存的内容类型具有字符集。这也应该是规则的一部分：

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;
}

否则将属于default设置范围。

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