我有一个小 Sinatra 应用程序,包括这个模块:
module Sprockets
module Helpers
def asset_path(source)
"/assets/#{Environment.instance.find_asset(source).digest_path}"
end
def sprockets
Environment.instance.call(env)
end
end
class << self
def precompile
dir = 'public/assets'
FileUtils.rm_rf(dir, secure: true)
::Sprockets::StaticCompiler.new(Environment.instance, 'public/assets', [/\.(png|jpg)$/, /^(application|ie)\.(css|js)$/]).compile
end
end
class Environment < ::Sprockets::Environment
include Singleton
def initialize
super
%w[app lib vendor].each do |dir|
%w[images javascripts stylesheets].each do |type|
path = File.join(root, dir, 'assets', type)
append_path(path) if File.exist?(path)
end
end
js_compressor = Uglifier.new
css_compressor = YUI::CssCompressor.new
context_class.instance_eval do
include Helpers
end
end
end
end
并定义了以下路线:
get('/assets/*') do
sprockets # Defined in the module above
end
一切都很好,资产在我的本地机器上使用pow
. 但是在 Heroku 上没有加载单个资产,服务器只为每个资产文件返回 404。