问如何使用rails、nginx和客运配置“`Access Control-”？

EN

cp $(passenger-config about resourcesdir)/templates/standalone/config.erb config/nginx.conf.erb
cp config/nginx.conf.erb config/nginx.conf.erb.original

web: bundle exec passenger start -p $PORT --max-pool-size 3 --nginx-config-template config/nginx.conf.erb

    location @static_asset {
        gzip_static on;
        expires max;
        add_header Cache-Control public;
        add_header ETag "";
    }

    location @static_asset {
        gzip_static on;
        expires max;
        add_header Cache-Control public;
        add_header ETag "";
        add_header Access-Control-Allow-Origin *;
        add_header Access-Control-Request-Method *;
    }

diff $(passenger-config about resourcesdir)/templates/standalone/config.erb config/nginx.conf.erb.original

    ##########################################################################
#  Passenger Standalone is built on the same technology that powers
#  Passenger for Nginx, so any configuration option supported by Passenger
#  for Nginx can be applied to Passenger Standalone as well. You can do
#  this by direct editing the Nginx configuration template that is used by
#  Passenger Standalone.
#
#  This file is the original template. DO NOT EDIT THIS FILE DIRECTLY.
#  Instead, make a copy of this file and pass the `--nginx-config-template`
#  parameter to Passenger Standalone.
#
#  Learn more about using the Nginx configuration template at:
#  https://www.phusionpassenger.com/library/config/standalone/intro.html#nginx-configuration-template
#
#  *** NOTE ***
#  If you customize the template file, make sure you keep an eye on the
#  original template file and merge any changes. New Phusion Passenger
#  features may require changes to the template file.
##############################################################

<%= include_passenger_internal_template('global.erb') %>

worker_processes 1;
events {
    worker_connections 4096;
}

http {
    <%= include_passenger_internal_template('http.erb', 4) %>

    ### BEGIN your own configuration options ###
    # This is a good place to put your own config
    # options. Note that your options must not
    # conflict with the ones Passenger already sets.
    # Learn more at:
    # https://www.phusionpassenger.com/library/config/standalone/intro.html#nginx-configuration-template

    ### END your own configuration options ###

    default_type application/octet-stream;
    types_hash_max_size 2048;
    server_names_hash_bucket_size 64;
    client_max_body_size 1024m;
    access_log off;
    keepalive_timeout 60;
    underscores_in_headers on;
    gzip on;
    gzip_comp_level 3;
    gzip_min_length 150;
    gzip_proxied any;
    gzip_types text/plain text/css text/json text/javascript
        application/javascript application/x-javascript application/json
        application/rss+xml application/vnd.ms-fontobject application/x-font-ttf
        application/xml font/opentype image/svg+xml text/xml;

    <% if @app_finder.multi_mode? %>
        # Default server entry for mass deployment mode.
        server {
            <%= include_passenger_internal_template('mass_deployment_default_server.erb', 12) %>
        }
    <% end %>

    <% for app in @apps %>
    server {
        <%= include_passenger_internal_template('server.erb', 8, true, binding) %>
        <%# <%= include_passenger_internal_template('rails_asset_pipeline.erb', 8, false) %1> %>

        ### BEGIN your own configuration options ###
        # This is a good place to put your own config
        # options. Note that your options must not
        # conflict with the ones Passenger already sets.
        # Learn more at:
        # https://www.phusionpassenger.com/library/config/standalone/intro.html#nginx-configuration-template
        # Rails asset pipeline support.
        location ~ "^/assets/.+-([0-9a-f]{32}|[0-9a-f]{64})\..+" {
            error_page 490 = @static_asset;
            error_page 491 = @dynamic_request;
            recursive_error_pages on;

            if (-f $request_filename) {
                return 490;
            }
            if (!-f $request_filename) {
                return 491;
            }
        }
        location @static_asset {
            gzip_static on;
            expires max;
            add_header Cache-Control public;
            add_header ETag "";
            if ($http_origin ~* ((https?:\/\/[^\/]*\.herokuapp\.com(:[0-9]+)?))) {
                add_header 'Access-Control-Allow-Origin' "$http_origin";
                add_header 'Access-Control-Allow-Credentials' 'true';
                add_header 'Access-Control-Allow-Methods' 'GET, HEAD';
                add_header 'Access-Control-Allow-Headers' 'Accept,Authorization,Cache-Control,Content-Type,DNT,If-Modified-Since,Keep-Alive,Origin,User-Agent,X-Mx-ReqToken,X-Requested-With';
            }
        }
        location @dynamic_request {
            passenger_enabled on;
        }

        ### END your own configuration options ###
    }
    passenger_pre_start <%= listen_url(app) %>;
    <% end %>

    <%= include_passenger_internal_template('footer.erb', 4) %>
}

headers['Access-Control-Allow-Origin'] = '*'
headers['Access-Control-Allow-Methods'] = 'POST, PUT, DELETE, GET, OPTIONS'
headers['Access-Control-Request-Method'] = '*'
headers['Access-Control-Allow-Headers'] = 'Origin, X-Requested-With, Content-Type, Accept, Authorization'
...