HTTP_IF_MODIFIED_SINCE标头未传递给Rails应用程序（Nginx，Passenger） [英] HTTP_IF_MODIFIED_SINCE header not passed to Rails app (Nginx, Passenger)

问题描述

我正在尝试在我的应用中使用HTTP_IF_MODIFIED_SINCE标头来确定资源是否陈旧/新鲜，并在这些情况下渲染200/304。
在我的开发环境中，一切正常，但我不能为我的生活让它在生产中工作。

I am trying to use the HTTP_IF_MODIFIED_SINCE header in my app to determine if resources are stale/fresh and render 200/304 in those cases. In my dev environment everything works fine but I can't for the life of me get it to work in production.

我正在使用Passenger 3.0.11和Nginx 1.0.13。

I am using Passenger 3.0.11 and Nginx 1.0.13.

如下所示，我尝试了proxy_pass_header，proxy_set_header，passenger_pass_header和passenger_set_cgi_param。最后一个实际上设置了一个HTTP_IF_MODIFIED_SINCE标题，但它是空的...
任何帮助/想法将不胜感激！

As you see below, I tried proxy_pass_header, proxy_set_header, passenger_pass_header and passenger_set_cgi_param. The last one actually sets a HTTP_IF_MODIFIED_SINCE header but it is empty... Any help/ideas would be greatly appreciated!

我的配置：

server {
  listen             80 default_server;
  root               /home/rails/myapp/current/public;
  passenger_enabled  on;
  charset            utf-8;

  proxy_pass_header If-Modified-Since;
  proxy_set_header If-Modified-Since $http_if_modified_since;
  passenger_pass_header If-Modified-Since;
  passenger_set_cgi_param HTTP_IF_MODIFIED_SINCE $http_if_modified_since;

  if (-f $document_root/system/maintenance.html) {
    rewrite ^(.*)$ /system/maintenance.html break;
  }

  location ~ \.(aspx|jsp|cgi)$ {
    return 410;
  }

  location ~ ^/(assets)/ {
    # http://guides.rubyonrails.org/asset_pipeline.html#server-configuration
    # gzip_static on;
    expires     1y;
    add_header  Cache-Control public;

    add_header Last-Modified "";
    add_header ETag "";
    break;
  }
}

推荐答案

这毕竟是用户错误。我以错误的格式将标题发送到应用程序（ IF_MODIFIED_SINCE 而不是 If-Modified-Since ）。在确定之后，它没有任何额外的指令。

This was a user error after all. I sent the header to the app in the wrong format (IF_MODIFIED_SINCE instead of If-Modified-Since). After fixing that, it worked without any of the extra directives.

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