Nginx图像头缓存不更新

Question

我在https://www.example.com/img/bart-had-a-groove.gif有一个图像文件

这是我的站点配置中唯一的缓存块，全局nginx.conf中没有缓存设置。

location ~* \.(?:jpg|jpeg|gif|png|ico|cur|gz|svg|svgz|mp4|ogg|ogv|webm|htc)$ {
  expires 1M;
  access_log off;
  add_header Cache-Control "public, no-transform, max-age=2628000";
}

现在，您可以看到我的标题被设置为Cache-Control "public, no-transform, max-age=2628000";，但是如果您将图像卷曲(例如，curl -X GET -I https://www.example.com/img/bart-had-a-groove.gif )，您将得到：

HTTP/1.1 200 OK
Content-Type: image/gif
Connection: keep-alive
Server: nginx/1.13.9
Content-Length: 771510
Last-Modified: Fri, 17 Feb 2017 17:26:23 GMT
ETag: "58a7323f-bc5b6"
Pragma: public
Cache-Control: public
Accept-Ranges: bytes
Date: Mon, 19 Mar 2018 21:49:33 GMT
Expires: Wed, 18 Apr 2018 21:49:33 GMT

您可以看到Cache-Control: public与配置不匹配。它缺少了no-transform, max-age=2628000部分。

每次变更后我都会运行systemctl stop nginx && systemctl start nginx && systemctl reload nginx。

更新服务器块的其余部分：

server {
  listen 80;
  listen 443;
  server_name example.com;
  return 301 https://www.$server_name$request_uri;
}

server {
  listen 80;
  listen 443 ssl http2;
  root /var/www/example.com/htdocs/;

  index index.html index.htm;

  server_name www.example.com;

  location / {
    autoindex on;
    try_files $uri $uri/ =404;    
  }

  location ~ \.php$ {
    fastcgi_split_path_info ^(.+?\.php)(|/.*)$;
    # Security note: If you're running a version of PHP older than the
    # latest 5.3, you should have "cgi.fix_pathinfo = 0;" in php.ini.
    # See http://serverfault.com/q/627903/94922 for details.
    include fastcgi_params;
    # Block httpoxy attacks. See https://httpoxy.org/.
    fastcgi_param HTTP_PROXY "";
    fastcgi_param SCRIPT_FILENAME $document_root$fastcgi_script_name;
    fastcgi_param PATH_INFO $fastcgi_path_info;
    fastcgi_param QUERY_STRING $query_string;
    fastcgi_intercept_errors on;
    # PHP 5 socket location.
    #fastcgi_pass unix:/var/run/php5-fpm.sock;
    # PHP 7 socket location.
    fastcgi_pass unix:/var/run/php/php7.0-fpm.sock;
  }

location ~* \.(?:jpg|jpeg|gif|png|ico|cur|gz|svg|svgz|mp4|ogg|ogv|webm|htc)$ {
  #expires 1M;
  access_log off;
  add_header Cache-Control "public, no-transform, max-age=2628000";
}

  pagespeed on;
  # Needs to exist and be writable by nginx.  Use tmpfs for best performance.
  pagespeed FileCachePath /var/ngx_pagespeed_cache;
  # Ensure requests for pagespeed optimized resources go to the pagespeed handler
  # and no extraneous headers get set.
  location ~ "\.pagespeed\.([a-z]\.)?[a-z]{2}\.[^.]{10}\.[^.]+" {
    add_header "" "";
  }
  location ~ "^/pagespeed_static/" { }
  location ~ "^/ngx_pagespeed_beacon$" { }
}

Answer 1

您正在使用两个相关的配置指令，涉及“缓存-控制”头(见下文)。我建议只使用add_ header ，因为您欣赏"Cache-Control“头部的"no-transform”指令。

expires 1M;

->将设置标题“缓存-控制”和“过期”。

见文件：

启用或禁用添加或修改“过期”和“缓存-控制”响应标头.

add_header缓存-控制“公共的，不转换的，最大年龄=2628000”；

->将手动设置“缓存-控制”标题。