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module Rack
# The Rack::TryStatic middleware delegates requests to Rack::Static middleware
# trying to match a static file
#
# Examples
#
# use Rack::TryStatic,
# :root => "public", # static files root dir
# :urls => %w[/], # match all requests
# :try => ['.html', 'index.html', '/index.html'] # try these postfixes sequentially
#
# uses same options as Rack::Static with extra :try option which is an array
# of postfixes to find desired file
class TryStatic
def initialize(app, options)
@app = app
@try = ['', *options[:try]]
@static = ::Rack::Static.new(
lambda { |_| [404, {}, []] },
options)
end
def call(env)
orig_path = env['PATH_INFO']
found = nil
@try.each do |path|
resp = @static.call(env.merge!({'PATH_INFO' => orig_path + path}))
break if !(403..405).include?(resp[0]) && found = resp
end
found or @app.call(env.merge!('PATH_INFO' => orig_path))
end
end
end
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