87 lines
2.8 KiB
Ruby
87 lines
2.8 KiB
Ruby
require 'active_support/core_ext/file'
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require 'action_view/helpers/asset_paths'
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module ActionView
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module Helpers
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class AssetPaths #:nodoc:
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attr_reader :config, :controller
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def initialize(config, controller)
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@config = config
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@controller = controller
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end
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# Add the extension +ext+ if not present. Return full or scheme-relative URLs otherwise untouched.
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# Prefix with <tt>/dir/</tt> if lacking a leading +/+. Account for relative URL
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# roots. Rewrite the asset path for cache-busting asset ids. Include
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# asset host, if configured, with the correct request protocol.
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def compute_public_path(source, dir, ext = nil, include_host = true)
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source = source.to_s
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return source if is_uri?(source) || is_scheme_relative_uri?(source)
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source = rewrite_extension(source, dir, ext) if ext
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source = "/#{dir}/#{source}" unless source[0] == ?/
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source = rewrite_asset_path(source, dir)
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if controller && include_host
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has_request = controller.respond_to?(:request)
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source = rewrite_host_and_protocol(source, has_request)
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end
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source
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end
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def is_uri?(path)
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path =~ %r{^[-a-z]+://|^cid:}
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end
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# A URI relative to a base URI's scheme?
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# See http://labs.apache.org/webarch/uri/rfc/rfc3986.html#relative-normal
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# "//g" => "http://g"
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def is_scheme_relative_uri?(path)
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path =~ %r{^//}
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end
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private
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def rewrite_extension(source, dir, ext)
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raise NotImplementedError
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end
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def rewrite_asset_path(source, path = nil)
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raise NotImplementedError
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end
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def rewrite_host_and_protocol(source, has_request)
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host = compute_asset_host(source)
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if has_request && host && !is_uri?(host)
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host = "#{controller.request.protocol}#{host}"
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end
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"#{host}#{source}"
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end
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# Pick an asset host for this source. Returns +nil+ if no host is set,
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# the host if no wildcard is set, the host interpolated with the
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# numbers 0-3 if it contains <tt>%d</tt> (the number is the source hash mod 4),
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# or the value returned from invoking the proc if it's a proc or the value from
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# invoking call if it's an object responding to call.
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def compute_asset_host(source)
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if host = config.asset_host
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if host.is_a?(Proc) || host.respond_to?(:call)
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case host.is_a?(Proc) ? host.arity : host.method(:call).arity
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when 2
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request = controller.respond_to?(:request) && controller.request
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host.call(source, request)
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else
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host.call(source)
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end
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else
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(host =~ /%d/) ? host % (source.hash % 4) : host
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end
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end
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end
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end
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end
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end |