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module ActionDispatch
class PublicExceptions
attr_accessor :public_path
def initialize(public_path)
@public_path = public_path
end
def call(env)
status = env["PATH_INFO"][1..-1]
request = ActionDispatch::Request.new(env)
content_type = request.formats.first
body = { :status => status, :error => Rack::Utils::HTTP_STATUS_CODES.fetch(status.to_i, Rack::Utils::HTTP_STATUS_CODES[500]) }
render(status, content_type, body)
end
private
def render(status, content_type, body)
format = "to_#{content_type.to_sym}" if content_type
if format && body.respond_to?(format)
render_format(status, content_type, body.public_send(format))
else
render_html(status)
end
end
def render_format(status, content_type, body)
[status, {'Content-Type' => "#{content_type}; charset=#{ActionDispatch::Response.default_charset}",
'Content-Length' => body.bytesize.to_s}, [body]]
end
def render_html(status)
found = false
path = "#{public_path}/#{status}.#{I18n.locale}.html" if I18n.locale
path = "#{public_path}/#{status}.html" unless path && (found = File.exist?(path))
if found || File.exist?(path)
render_format(status, 'text/html', File.read(path))
else
[404, { "X-Cascade" => "pass" }, []]
end
end
end
end
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