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Diffstat (limited to 'actionpack/lib/action_view/helpers/asset_url_helper.rb')
| -rw-r--r-- | actionpack/lib/action_view/helpers/asset_url_helper.rb | 354 |
1 files changed, 0 insertions, 354 deletions
diff --git a/actionpack/lib/action_view/helpers/asset_url_helper.rb b/actionpack/lib/action_view/helpers/asset_url_helper.rb deleted file mode 100644 index 71b78cf0b5..0000000000 --- a/actionpack/lib/action_view/helpers/asset_url_helper.rb +++ /dev/null @@ -1,354 +0,0 @@ -require 'zlib' - -module ActionView - # = Action View Asset URL Helpers - module Helpers - # This module provides methods for generating asset paths and - # urls. - # - # image_path("rails.png") - # # => "/assets/rails.png" - # - # image_url("rails.png") - # # => "http://www.example.com/assets/rails.png" - # - # === Using asset hosts - # - # By default, Rails links to these assets on the current host in the public - # folder, but you can direct Rails to link to assets from a dedicated asset - # server by setting <tt>ActionController::Base.asset_host</tt> in the application - # configuration, typically in <tt>config/environments/production.rb</tt>. - # For example, you'd define <tt>assets.example.com</tt> to be your asset - # host this way, inside the <tt>configure</tt> block of your environment-specific - # configuration files or <tt>config/application.rb</tt>: - # - # config.action_controller.asset_host = "assets.example.com" - # - # Helpers take that into account: - # - # image_tag("rails.png") - # # => <img alt="Rails" src="http://assets.example.com/assets/rails.png" /> - # stylesheet_link_tag("application") - # # => <link href="http://assets.example.com/assets/application.css" media="screen" rel="stylesheet" /> - # - # Browsers typically open at most two simultaneous connections to a single - # host, which means your assets often have to wait for other assets to finish - # downloading. You can alleviate this by using a <tt>%d</tt> wildcard in the - # +asset_host+. For example, "assets%d.example.com". If that wildcard is - # present Rails distributes asset requests among the corresponding four hosts - # "assets0.example.com", ..., "assets3.example.com". With this trick browsers - # will open eight simultaneous connections rather than two. - # - # image_tag("rails.png") - # # => <img alt="Rails" src="http://assets0.example.com/assets/rails.png" /> - # stylesheet_link_tag("application") - # # => <link href="http://assets2.example.com/assets/application.css" media="screen" rel="stylesheet" /> - # - # To do this, you can either setup four actual hosts, or you can use wildcard - # DNS to CNAME the wildcard to a single asset host. You can read more about - # setting up your DNS CNAME records from your ISP. - # - # Note: This is purely a browser performance optimization and is not meant - # for server load balancing. See http://www.die.net/musings/page_load_time/ - # for background. - # - # Alternatively, you can exert more control over the asset host by setting - # +asset_host+ to a proc like this: - # - # ActionController::Base.asset_host = Proc.new { |source| - # "http://assets#{Digest::MD5.hexdigest(source).to_i(16) % 2 + 1}.example.com" - # } - # image_tag("rails.png") - # # => <img alt="Rails" src="http://assets1.example.com/assets/rails.png" /> - # stylesheet_link_tag("application") - # # => <link href="http://assets2.example.com/assets/application.css" media="screen" rel="stylesheet" /> - # - # The example above generates "http://assets1.example.com" and - # "http://assets2.example.com". This option is useful for example if - # you need fewer/more than four hosts, custom host names, etc. - # - # As you see the proc takes a +source+ parameter. That's a string with the - # absolute path of the asset, for example "/assets/rails.png". - # - # ActionController::Base.asset_host = Proc.new { |source| - # if source.ends_with?('.css') - # "http://stylesheets.example.com" - # else - # "http://assets.example.com" - # end - # } - # image_tag("rails.png") - # # => <img alt="Rails" src="http://assets.example.com/assets/rails.png" /> - # stylesheet_link_tag("application") - # # => <link href="http://stylesheets.example.com/assets/application.css" media="screen" rel="stylesheet" /> - # - # Alternatively you may ask for a second parameter +request+. That one is - # particularly useful for serving assets from an SSL-protected page. The - # example proc below disables asset hosting for HTTPS connections, while - # still sending assets for plain HTTP requests from asset hosts. If you don't - # have SSL certificates for each of the asset hosts this technique allows you - # to avoid warnings in the client about mixed media. - # - # config.action_controller.asset_host = Proc.new { |source, request| - # if request.ssl? - # "#{request.protocol}#{request.host_with_port}" - # else - # "#{request.protocol}assets.example.com" - # end - # } - # - # You can also implement a custom asset host object that responds to +call+ - # and takes either one or two parameters just like the proc. - # - # config.action_controller.asset_host = AssetHostingWithMinimumSsl.new( - # "http://asset%d.example.com", "https://asset1.example.com" - # ) - # - module AssetUrlHelper - URI_REGEXP = %r{^[-a-z]+://|^(?:cid|data):|^//} - - # Computes the path to asset in public directory. If :type - # options is set, a file extension will be appended and scoped - # to the corresponding public directory. - # - # All other asset *_path helpers delegate through this method. - # - # asset_path "application.js" # => /application.js - # asset_path "application", type: :javascript # => /javascripts/application.js - # asset_path "application", type: :stylesheet # => /stylesheets/application.css - # asset_path "http://www.example.com/js/xmlhr.js" # => http://www.example.com/js/xmlhr.js - def asset_path(source, options = {}) - source = source.to_s - return "" unless source.present? - return source if source =~ URI_REGEXP - - tail, source = source[/([\?#].+)$/], source.sub(/([\?#].+)$/, '') - - if extname = compute_asset_extname(source, options) - source = "#{source}#{extname}" - end - - if source[0] != ?/ - source = compute_asset_path(source, options) - end - - relative_url_root = defined?(config.relative_url_root) && config.relative_url_root - if relative_url_root - source = "#{relative_url_root}#{source}" unless source.starts_with?("#{relative_url_root}/") - end - - if host = compute_asset_host(source, options) - source = "#{host}#{source}" - end - - "#{source}#{tail}" - end - alias_method :path_to_asset, :asset_path # aliased to avoid conflicts with a asset_path named route - - # Computes the full URL to a asset in the public directory. This - # will use +asset_path+ internally, so most of their behaviors - # will be the same. - def asset_url(source, options = {}) - path_to_asset(source, options.merge(:protocol => :request)) - end - alias_method :url_to_asset, :asset_url # aliased to avoid conflicts with an asset_url named route - - ASSET_EXTENSIONS = { - javascript: '.js', - stylesheet: '.css' - } - - # Compute extname to append to asset path. Returns nil if - # nothing should be added. - def compute_asset_extname(source, options = {}) - return if options[:extname] == false - extname = options[:extname] || ASSET_EXTENSIONS[options[:type]] - extname if extname && File.extname(source) != extname - end - - # Maps asset types to public directory. - ASSET_PUBLIC_DIRECTORIES = { - audio: '/audios', - font: '/fonts', - image: '/images', - javascript: '/javascripts', - stylesheet: '/stylesheets', - video: '/videos' - } - - # Computes asset path to public directory. Plugins and - # extensions can override this method to point to custom assets - # or generate digested paths or query strings. - def compute_asset_path(source, options = {}) - dir = ASSET_PUBLIC_DIRECTORIES[options[:type]] || "" - File.join(dir, source) - end - - # Pick an asset host for this source. Returns +nil+ if no host is set, - # the host if no wildcard is set, the host interpolated with the - # numbers 0-3 if it contains <tt>%d</tt> (the number is the source hash mod 4), - # or the value returned from invoking call on an object responding to call - # (proc or otherwise). - def compute_asset_host(source = "", options = {}) - request = self.request if respond_to?(:request) - host = config.asset_host if defined? config.asset_host - host ||= request.base_url if request && options[:protocol] == :request - return unless host - - if host.respond_to?(:call) - arity = host.respond_to?(:arity) ? host.arity : host.method(:call).arity - args = [source] - args << request if request && (arity > 1 || arity < 0) - host = host.call(*args) - elsif host =~ /%d/ - host = host % (Zlib.crc32(source) % 4) - end - - if host =~ URI_REGEXP - host - else - protocol = options[:protocol] || config.default_asset_host_protocol || (request ? :request : :relative) - case protocol - when :relative - "//#{host}" - when :request - "#{request.protocol}#{host}" - else - "#{protocol}://#{host}" - end - end - end - - # Computes the path to a javascript asset in the public javascripts directory. - # If the +source+ filename has no extension, .js will be appended (except for explicit URIs) - # Full paths from the document root will be passed through. - # Used internally by javascript_include_tag to build the script path. - # - # javascript_path "xmlhr" # => /javascripts/xmlhr.js - # javascript_path "dir/xmlhr.js" # => /javascripts/dir/xmlhr.js - # javascript_path "/dir/xmlhr" # => /dir/xmlhr.js - # javascript_path "http://www.example.com/js/xmlhr" # => http://www.example.com/js/xmlhr - # javascript_path "http://www.example.com/js/xmlhr.js" # => http://www.example.com/js/xmlhr.js - def javascript_path(source, options = {}) - path_to_asset(source, {type: :javascript}.merge!(options)) - end - alias_method :path_to_javascript, :javascript_path # aliased to avoid conflicts with a javascript_path named route - - # Computes the full URL to a javascript asset in the public javascripts directory. - # This will use +javascript_path+ internally, so most of their behaviors will be the same. - def javascript_url(source, options = {}) - url_to_asset(source, {type: :javascript}.merge!(options)) - end - alias_method :url_to_javascript, :javascript_url # aliased to avoid conflicts with a javascript_url named route - - # Computes the path to a stylesheet asset in the public stylesheets directory. - # If the +source+ filename has no extension, <tt>.css</tt> will be appended (except for explicit URIs). - # Full paths from the document root will be passed through. - # Used internally by +stylesheet_link_tag+ to build the stylesheet path. - # - # stylesheet_path "style" # => /stylesheets/style.css - # stylesheet_path "dir/style.css" # => /stylesheets/dir/style.css - # stylesheet_path "/dir/style.css" # => /dir/style.css - # stylesheet_path "http://www.example.com/css/style" # => http://www.example.com/css/style - # stylesheet_path "http://www.example.com/css/style.css" # => http://www.example.com/css/style.css - def stylesheet_path(source, options = {}) - path_to_asset(source, {type: :stylesheet}.merge!(options)) - end - alias_method :path_to_stylesheet, :stylesheet_path # aliased to avoid conflicts with a stylesheet_path named route - - # Computes the full URL to a stylesheet asset in the public stylesheets directory. - # This will use +stylesheet_path+ internally, so most of their behaviors will be the same. - def stylesheet_url(source, options = {}) - url_to_asset(source, {type: :stylesheet}.merge!(options)) - end - alias_method :url_to_stylesheet, :stylesheet_url # aliased to avoid conflicts with a stylesheet_url named route - - # Computes the path to an image asset. - # Full paths from the document root will be passed through. - # Used internally by +image_tag+ to build the image path: - # - # image_path("edit") # => "/assets/edit" - # image_path("edit.png") # => "/assets/edit.png" - # image_path("icons/edit.png") # => "/assets/icons/edit.png" - # image_path("/icons/edit.png") # => "/icons/edit.png" - # image_path("http://www.example.com/img/edit.png") # => "http://www.example.com/img/edit.png" - # - # If you have images as application resources this method may conflict with their named routes. - # The alias +path_to_image+ is provided to avoid that. Rails uses the alias internally, and - # plugin authors are encouraged to do so. - def image_path(source, options = {}) - path_to_asset(source, {type: :image}.merge!(options)) - end - alias_method :path_to_image, :image_path # aliased to avoid conflicts with an image_path named route - - # Computes the full URL to an image asset. - # This will use +image_path+ internally, so most of their behaviors will be the same. - def image_url(source, options = {}) - url_to_asset(source, {type: :image}.merge!(options)) - end - alias_method :url_to_image, :image_url # aliased to avoid conflicts with an image_url named route - - # Computes the path to a video asset in the public videos directory. - # Full paths from the document root will be passed through. - # Used internally by +video_tag+ to build the video path. - # - # video_path("hd") # => /videos/hd - # video_path("hd.avi") # => /videos/hd.avi - # video_path("trailers/hd.avi") # => /videos/trailers/hd.avi - # video_path("/trailers/hd.avi") # => /trailers/hd.avi - # video_path("http://www.example.com/vid/hd.avi") # => http://www.example.com/vid/hd.avi - def video_path(source, options = {}) - path_to_asset(source, {type: :video}.merge!(options)) - end - alias_method :path_to_video, :video_path # aliased to avoid conflicts with a video_path named route - - # Computes the full URL to a video asset in the public videos directory. - # This will use +video_path+ internally, so most of their behaviors will be the same. - def video_url(source, options = {}) - url_to_asset(source, {type: :video}.merge!(options)) - end - alias_method :url_to_video, :video_url # aliased to avoid conflicts with an video_url named route - - # Computes the path to an audio asset in the public audios directory. - # Full paths from the document root will be passed through. - # Used internally by +audio_tag+ to build the audio path. - # - # audio_path("horse") # => /audios/horse - # audio_path("horse.wav") # => /audios/horse.wav - # audio_path("sounds/horse.wav") # => /audios/sounds/horse.wav - # audio_path("/sounds/horse.wav") # => /sounds/horse.wav - # audio_path("http://www.example.com/sounds/horse.wav") # => http://www.example.com/sounds/horse.wav - def audio_path(source, options = {}) - path_to_asset(source, {type: :audio}.merge!(options)) - end - alias_method :path_to_audio, :audio_path # aliased to avoid conflicts with an audio_path named route - - # Computes the full URL to an audio asset in the public audios directory. - # This will use +audio_path+ internally, so most of their behaviors will be the same. - def audio_url(source, options = {}) - url_to_asset(source, {type: :audio}.merge!(options)) - end - alias_method :url_to_audio, :audio_url # aliased to avoid conflicts with an audio_url named route - - # Computes the path to a font asset. - # Full paths from the document root will be passed through. - # - # font_path("font") # => /assets/font - # font_path("font.ttf") # => /assets/font.ttf - # font_path("dir/font.ttf") # => /assets/dir/font.ttf - # font_path("/dir/font.ttf") # => /dir/font.ttf - # font_path("http://www.example.com/dir/font.ttf") # => http://www.example.com/dir/font.ttf - def font_path(source, options = {}) - path_to_asset(source, {type: :font}.merge!(options)) - end - alias_method :path_to_font, :font_path # aliased to avoid conflicts with an font_path named route - - # Computes the full URL to a font asset. - # This will use +font_path+ internally, so most of their behaviors will be the same. - def font_url(source, options = {}) - url_to_asset(source, {type: :font}.merge!(options)) - end - alias_method :url_to_font, :font_url # aliased to avoid conflicts with an font_url named route - end - end -end |