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require 'rack/utils'
module ActionDispatch
class Static
class FileHandler
def initialize(at, root)
@at = at.chomp("/")
@file_server = ::Rack::File.new(root)
end
def file_exist?(path)
(path = full_readable_path(path)) && File.file?(path)
end
def directory_exist?(path)
(path = full_readable_path(path)) && File.directory?(path)
end
def call(env)
env["PATH_INFO"].gsub!(/^#{@at}/, "")
@file_server.call(env)
end
private
def includes_path?(path)
@at == "" || path =~ /^#{@at}/
end
def full_readable_path(path)
return unless includes_path?(path)
path = path.gsub(/^#{@at}/, "")
File.join(@file_server.root, ::Rack::Utils.unescape(path))
end
end
FILE_METHODS = %w(GET HEAD).freeze
def initialize(app, roots)
@app = app
roots = normalize_roots(roots)
@file_handlers = file_handlers(roots)
end
def call(env)
path = env['PATH_INFO'].chomp('/')
method = env['REQUEST_METHOD']
if FILE_METHODS.include?(method)
if file_handler = file_exist?(path)
return file_handler.call(env)
else
cached_path = directory_exist?(path) ? "#{path}/index" : path
cached_path += ::ActionController::Base.page_cache_extension
if file_handler = file_exist?(cached_path)
env['PATH_INFO'] = cached_path
return file_handler.call(env)
end
end
end
@app.call(env)
end
private
def file_exist?(path)
@file_handlers.detect { |f| f.file_exist?(path) }
end
def directory_exist?(path)
@file_handlers.detect { |f| f.directory_exist?(path) }
end
def normalize_roots(roots)
roots.is_a?(Hash) ? roots : { "/" => roots.chomp("/") }
end
def file_handlers(roots)
roots.map do |at, root|
FileHandler.new(at, root)
end
end
end
end
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