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0b81b3094a
The status returned in the rack [status, headers, body] array was a string, which can cause problems with middleware that assumes the status will be a Fixnum. This likely never surfaced because other middleware to_i the status returned from downstream apps before passing it on.
55 lines
2 KiB
Ruby
55 lines
2 KiB
Ruby
module ActionDispatch
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# When called, this middleware renders an error page. By default if an HTML
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# response is expected it will render static error pages from the `/public`
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# directory. For example when this middleware receives a 500 response it will
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# render the template found in `/public/500.html`.
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# If an internationalized locale is set, this middleware will attempt to render
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# the template in `/public/500.<locale>.html`. If an internationalized template
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# is not found it will fall back on `/public/500.html`.
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#
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# When a request with a content type other than HTML is made, this middleware
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# will attempt to convert error information into the appropriate response type.
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class PublicExceptions
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attr_accessor :public_path
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def initialize(public_path)
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@public_path = public_path
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end
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def call(env)
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status = env["PATH_INFO"][1..-1].to_i
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request = ActionDispatch::Request.new(env)
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content_type = request.formats.first
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body = { :status => status, :error => Rack::Utils::HTTP_STATUS_CODES.fetch(status, Rack::Utils::HTTP_STATUS_CODES[500]) }
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render(status, content_type, body)
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end
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private
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def render(status, content_type, body)
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format = "to_#{content_type.to_sym}" if content_type
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if format && body.respond_to?(format)
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render_format(status, content_type, body.public_send(format))
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else
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render_html(status)
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end
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end
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def render_format(status, content_type, body)
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[status, {'Content-Type' => "#{content_type}; charset=#{ActionDispatch::Response.default_charset}",
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'Content-Length' => body.bytesize.to_s}, [body]]
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end
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def render_html(status)
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path = "#{public_path}/#{status}.#{I18n.locale}.html"
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path = "#{public_path}/#{status}.html" unless (found = File.exist?(path))
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if found || File.exist?(path)
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render_format(status, 'text/html', File.read(path))
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else
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[404, { "X-Cascade" => "pass" }, []]
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end
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end
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end
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end
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