Nginx 没有缓存我的应用程序

Question

我正在尝试使用 Nginx 设置我的 ExpressApp 及其呈现的 Jade 文件的缓存。

当我在运行 google Pagespeed Insight 测试时查看我的应用程序的 pm2 日志时，我发现图像和 HTML 仍然由应用程序而不是 Nginx 代理提供。

两个问题：

1. 如何更改我的配置才能获得预期的效果？
2. 如何有效地验证设置/缓存是否正常工作？

谢谢！

我当前的 Nginx 配置：

proxy_cache_path /var/lib/nginx/cache levels=1:2 keys_zone=backcache:8m max_size=50m;
proxy_cache_key "$scheme$request_method$host$request_uri$is_args$args";
proxy_cache_valid 200 302 10m;
proxy_cache_valid 404 1m;

server {
        listen 80 default_server;
        listen [::]:80 default_server;

        location / {

                 expires 1w;
                 proxy_cache backcache;
                 #proxy_cache_bypass $http_cache_control;
                 add_header X-Proxy-Cache $upstream_cache_status;

                 proxy_pass http://localhost:3030;
         } 
}

标题：

* TLS 1.2 connection using TLS_ECDHE_RSA_WITH_AES_256_CBC_SHA384
* Server certificate: ###
* Server certificate: COMODO RSA Domain Validation Secure Server CA
* Server certificate: COMODO RSA Certification Authority
* Server certificate: AddTrust External CA Root
> GET / HTTP/1.1
> Host: ###
> User-Agent: curl/7.43.0
> Accept: */*
>
< HTTP/1.1 200 OK
< Server: nginx/1.10.0 (Ubuntu)
< Date: Thu, 24 Nov 2016 13:15:37 GMT
< Content-Type: text/html; charset=utf-8
< Content-Length: 66761
< Connection: keep-alive
< Vary: Accept-Encoding
< X-Powered-By: Express
< Access-Control-Allow-Origin: *
< Access-Control-Allow-Methods: GET,PUT,POST,DELETE
< Access-Control-Allow-Headers: Origin, x-access-token, X-Requested-With, Content-Type, Accept, un-populated
< ETag: W/"104c9-8+4lo531tUk9k3SJq4sPHg"
< Expires: Thu, 01 Dec 2016 13:15:37 GMT
< Cache-Control: max-age=604800
< X-Proxy-Cache: MISS

对一个图像的两个连续请求的标头

➜  ~ curl -I **url/img.jpg**
HTTP/1.1 200 OK
Server: nginx/1.10.0 (Ubuntu)
Date: Fri, 25 Nov 2016 03:17:02 GMT
Content-Type: application/octet-stream
Content-Length: 11007
Connection: keep-alive
X-Powered-By: Express
Access-Control-Allow-Origin: *
Access-Control-Allow-Methods: GET,PUT,POST,DELETE
Access-Control-Allow-Headers: Origin, x-access-token, X-Requested-With, Content-Type, Accept, un-populated
Accept-Ranges: bytes
Cache-Control: max-age=604800
Last-Modified: Thu, 17 Nov 2016 16:23:13 GMT
ETag: W/"2aff-158731964ca"
Expires: Fri, 02 Dec 2016 03:17:02 GMT
X-Proxy-Cache: MISS

➜  ~ curl -I **url/img.jpg**
HTTP/1.1 200 OK
Server: nginx/1.10.0 (Ubuntu)
Date: Fri, 25 Nov 2016 03:17:08 GMT
Content-Type: application/octet-stream
Content-Length: 11007
Connection: keep-alive
X-Powered-By: Express
Access-Control-Allow-Origin: *
Access-Control-Allow-Methods: GET,PUT,POST,DELETE
Access-Control-Allow-Headers: Origin, x-access-token, X-Requested-With, Content-Type, Accept, un-populated
Accept-Ranges: bytes
Cache-Control: max-age=604800
Last-Modified: Thu, 17 Nov 2016 16:23:13 GMT
ETag: W/"2aff-158731964ca"
Expires: Fri, 02 Dec 2016 03:17:08 GMT
X-Proxy-Cache: MISS

Answer 1

您显示为请求标头的标头很可能不是原始标头，因为它显示“显示临时标头”。

实际的请求标头可能包含“缓存控制”标头，并且您的 nginx 配置使用该标头绕过缓存，如“X-Proxy-Cache:BYPASS”响应标头所示。

如果没有理由保留它，您应该从配置中删除 proxy_cache_bypass-directive。