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require 'rack/utils'
module ActionDispatch
class FileHandler
def initialize(at, root)
@at, @root = at.chomp('/'), root.chomp('/')
@compiled_at = @at.blank? ? nil : /^#{Regexp.escape(at)}/
@compiled_root = /^#{Regexp.escape(root)}/
@file_server = ::Rack::File.new(@root)
end
def match?(path)
path = path.dup
if !@compiled_at || path.sub!(@compiled_at, '')
full_path = path.empty? ? @root : File.join(@root, ::Rack::Utils.unescape(path))
paths = "#{full_path}#{ext}"
matches = Dir[paths]
match = matches.detect { |m| File.file?(m) }
if match
match.sub!(@compiled_root, '')
match
end
end
end
def call(env)
@file_server.call(env)
end
def ext
@ext ||= begin
ext = ::ActionController::Base.page_cache_extension
"{,#{ext},/index#{ext}}"
end
end
end
class Static
FILE_METHODS = %w(GET HEAD).freeze
def initialize(app, roots)
@app = app
@file_handlers = create_file_handlers(roots)
end
def call(env)
path = env['PATH_INFO'].chomp('/')
method = env['REQUEST_METHOD']
if FILE_METHODS.include?(method)
@file_handlers.each do |file_handler|
if match = file_handler.match?(path)
env["PATH_INFO"] = match
return file_handler.call(env)
end
end
end
@app.call(env)
end
private
def create_file_handlers(roots)
roots = { '' => roots } unless roots.is_a?(Hash)
roots.map do |at, root|
FileHandler.new(at, root) if File.exist?(root)
end.compact
end
end
end
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