在开发模式下使用 Railsasset_path助手包含图像时，我看到 Rails 将资产解析为包含文件系统上图像绝对路径的 URL（真的，我是认真的）。
让我们从 css.erb 文件开始：
body {
background-image: url(<%= asset_path "cork.bg.gif" %>);
}
从帮助程序返回的路径在编译的 CSS 中看起来很好......
body {
background: url(/assets/cork.bg.gif);
}
...但是当浏览器请求 /assets/cork.bg.gif 时，一切都将崩溃。举个例子（实物截图）：
更重要的是，日志显示中间件实际上正在处理两个请求：
Started GET "/assets/cork.bg.gif" for 127.0.0.1 at 2013-05-31 18:52:39 -0400
Served asset /cork.bg.gif - 200 OK (0ms)
Started GET "/var/www/corkboard.me/app/assets/images/cork.bg.gif" for 127.0.0.1 at 2013-05-31 18:52:39 -0400
ActionController::RoutingError (No route matches [GET] "/var/www/corkboard.me/app/assets/images/cork.bg.gif"):
actionpack (3.2.13) lib/action_dispatch/middleware/debug_exceptions.rb:21:in `call'
actionpack (3.2.13) lib/action_dispatch/middleware/show_exceptions.rb:56:in `call'
railties (3.2.13) lib/rails/rack/logger.rb:32:in `call_app'
railties (3.2.13) lib/rails/rack/logger.rb:16:in `block in call'
activesupport (3.2.13) lib/active_support/tagged_logging.rb:22:in `tagged'
railties (3.2.13) lib/rails/rack/logger.rb:16:in `call'
actionpack (3.2.13) lib/action_dispatch/middleware/request_id.rb:22:in `call'
rack (1.4.5) lib/rack/methodoverride.rb:21:in `call'
rack (1.4.5) lib/rack/runtime.rb:17:in `call'
activesupport (3.2.13) lib/active_support/cache/strategy/local_cache.rb:72:in `call'
rack (1.4.5) lib/rack/lock.rb:15:in `call'
actionpack (3.2.13) lib/action_dispatch/middleware/static.rb:63:in `call'
railties (3.2.13) lib/rails/engine.rb:479:in `call'
railties (3.2.13) lib/rails/application.rb:223:in `call'
railties (3.2.13) lib/rails/railtie/configurable.rb:30:in `method_missing'
unicorn (4.6.2) lib/unicorn/http_server.rb:552:in `process_client'
unicorn (4.6.2) lib/unicorn/http_server.rb:632:in `worker_loop'
unicorn (4.6.2) lib/unicorn/http_server.rb:500:in `spawn_missing_workers'
unicorn (4.6.2) lib/unicorn/http_server.rb:142:in `start'
unicorn (4.6.2) bin/unicorn_rails:209:in `<top (required)>'
/usr/bin/unicorn_rails:23:in `load'
/usr/bin/unicorn_rails:23:in `<main>'
Rendered /usr/lib/ruby/gems/1.9.1/gems/actionpack-3.2.13/lib/action_dispatch/middleware/templates/rescues/routing_error.erb within rescues/layout (0.7ms)
我不明白发生了什么，解决这个问题非常令人沮丧。这是来自浏览器的一个请求。什么可以添加该绝对文件路径？
这是我的 application.rb 和 development.rb 配置文件。请帮忙。谁给我解决这个问题的答案，可以免费订阅一年的 NoteApp ( https://noteapp.com )
应用程序.rb
require File.expand_path('../boot', __FILE__)
require 'rails/all'
# If you have a Gemfile, require the gems listed there, including any gems
# you've limited to :test, :development, or :production.
Bundler.require(:default, Rails.env) if defined?(Bundler)
SITE_CONFIG = YAML.load_file("config/config.yml")[Rails.env]
module Corkboard
class Application < Rails::Application
# Settings in config/environments/* take precedence over those specified here.
# Application configuration should go into files in config/initializers
# -- all .rb files in that directory are automatically loaded.
# Custom directories with classes and modules you want to be autoloadable.
# config.autoload_paths += %W(#{config.root}/extras)
# Only load the plugins named here, in the order given (default is alphabetical).
# :all can be used as a placeholder for all plugins not explicitly named.
# config.plugins = [ :exception_notification, :ssl_requirement, :all ]
# Activate observers that should always be running.
# config.active_record.observers = :cacher, :garbage_collector, :forum_observer
# Set Time.zone default to the specified zone and make Active Record auto-convert to this zone.
# Run "rake -D time" for a list of tasks for finding time zone names. Default is UTC.
# config.time_zone = 'Central Time (US & Canada)'
# The default locale is :en and all translations from config/locales/*.rb,yml are auto loaded.
# config.i18n.load_path += Dir[Rails.root.join('my', 'locales', '*.{rb,yml}').to_s]
# config.i18n.default_locale = :de
# JavaScript files you want as :defaults (application.js is always included).
# config.action_view.javascript_expansions[:defaults] = %w(jquery rails)
# Configure the default encoding used in templates for Ruby 1.9.
config.encoding = "utf-8"
# Configure sensitive parameters which will be filtered from the log file.
config.filter_parameters += [:password, :xdr_data]
config.assets.enabled = true
config.assets.version = '1.1'
end
end
发展.rb
Corkboard::Application.configure do
# Settings specified here will take precedence over those in config/application.rb
# In the development environment your application's code is reloaded on
# every request. This slows down response time but is perfect for development
# since you don't have to restart the webserver when you make code changes.
config.cache_classes = false
# Log error messages when you accidentally call methods on nil.
config.whiny_nils = true
# Show full error reports and disable caching
config.consider_all_requests_local = true
config.action_controller.perform_caching = false
# Don't care if the mailer can't send
config.action_mailer.raise_delivery_errors = false
# Print deprecation notices to the Rails logger
config.active_support.deprecation = :log
# Only use best-standards-support built into browsers
config.action_dispatch.best_standards_support = :builtin
# Set header for nginx to handle large uploads.
# e.g. http://thedataasylum.com/articles/how-rails-nginx-x-accel-redirect-work-together.html
config.action_dispatch.x_sendfile_header = 'X-Accel-Redirect'
config.assets.compress = false
config.assets.debug = true
config.assets.digest = false
config.serve_static_assets = true
end
编辑：添加了 nginx 配置。
worker_processes 1;
user nobody nogroup;
pid /tmp/nginx.pid;
error_log /var/www/corkboard.me/log/nginx.error.log;
events {
worker_connections 1024; # increase if you have lots of clients
# Set this to on if you have more than 1 working processes
# This will allow only one child to watch the pollset and accept
# a connection to a socket
accept_mutex off; # "on" if nginx worker_processes > 1
}
http {
include mime.types;
default_type application/octet-stream;
access_log /var/www/corkboard.me/log/nginx.access.log combined;
# This tells Nginx to ignore the contents of a file it is sending
# and uses the kernel sendfile instead
sendfile on;
# Set this to on if you have sendfile on
# It will prepend the HTTP response headers before
# calling sendfile()
tcp_nopush on;
# This disables the "Nagle buffering algorithm" (Nginx Docs)
# Good for websites that send a lot of small requests that
# don't need a response
tcp_nodelay off;
gzip on;
gzip_http_version 1.0;
gzip_proxied any;
gzip_min_length 500;
gzip_disable "MSIE [1-6]\.";
gzip_types text/plain text/html text/xml text/css
text/comma-separated-values
text/javascript application/x-javascript
application/atom+xml;
upstream unicorn_server {
# This is the socket we configured in unicorn.rb
server unix:/var/www/corkboard.me/tmp/sockets/unicorn.sock
fail_timeout=0;
}
server {
listen 80;
listen 443 ssl;
ssl_certificate /path/to/file.crt;
ssl_certificate_key /path/to/file.key;
server_name hello.corkboard.me;
location / {
proxy_pass http://127.0.0.1:8000;
proxy_set_header Host $host;
}
}
server {
listen 80;
listen 443 ssl;
ssl_certificate /path/to/file.crt;
ssl_certificate_key /path/to/file.key;
client_max_body_size 4G;
server_name .corkboard.me;
keepalive_timeout 5;
rewrite ^ https://noteapp.com$request_uri? permanent;
}
server {
listen 80;
listen 443 ssl;
server_name www.noteapp.com;
ssl_certificate /path/to/file.crt;
ssl_certificate_key /path/to/file.key;
keepalive_timeout 5;
rewrite ^ https://noteapp.com$request_uri? permanent;
}
server {
listen 80;
listen 443 default_server ssl;
ssl_certificate /path/to/file.crt;
ssl_certificate_key /path/to/file.key;
client_max_body_size 4G;
server_name noteapp.com;
keepalive_timeout 5;
# Location of our static files
root /var/www/corkboard.me/public;
location / {
set $https_val "";
if ($server_port = 443) {
set $https_val "https";
}
proxy_set_header X-Forwarded-For $proxy_add_x_forwarded_for;
proxy_set_header X-FORWARDED_PROTO $https_val;
proxy_set_header Host $http_host;
proxy_redirect off;
# If you don't find the filename in the static files
# Then request it from the unicorn server
if (!-f $request_filename) {
proxy_pass http://unicorn_server;
break;
}
}
error_page 502 503 /maintenance.html;
error_page 500 504 /500.html;
}
}