Module: Assiette::Helpers

Defined in:
lib/assiette/helpers.rb

Instance Method Summary collapse

Instance Method Details

#assiette_asset_integrity(path) ⇒ Object

Returns the SRI integrity hash for an asset, computed over the served (rewritten) content. Returns nil if the file is not found.



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# File 'lib/assiette/helpers.rb', line 15

def assiette_asset_integrity(path)
  entry = request.env["assiette.stack"]&.last
  raise "No Assiette::Server in middleware stack" unless entry
  entry[:server].asset_integrity(path)
end

#assiette_asset_path(path) ⇒ Object

Returns the URL path to an asset served by Assiette, with a cache-busting version tag appended.



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# File 'lib/assiette/helpers.rb', line 7

def assiette_asset_path(path)
  entry = request.env["assiette.stack"]&.last
  raise "No Assiette::Server in middleware stack" unless entry
  entry[:server].absolute_asset_url_path(path, entry[:script_name])
end

#assiette_modulepreload_tags ⇒ Object

Generates <link rel=“modulepreload”> tags for all detected ES modules under the configured asset roots. Each tag includes an SRI integrity hash computed over the served (rewritten) content.



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# File 'lib/assiette/helpers.rb', line 30

def assiette_modulepreload_tags
  entry = request.env["assiette.stack"]&.last
  raise "No Assiette::Server in middleware stack" unless entry
  modules = entry[:server].js_modules
  safe_join(modules.map { |mod|
    tag.link(rel: "modulepreload", href: assiette_asset_path(mod[:path]),
      integrity: mod[:integrity], crossorigin: "anonymous")
  }, "\n")
end

#assiette_stylesheet_tag(path) ⇒ Object

Generates a <link rel=“stylesheet”> tag with SRI integrity.



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# File 'lib/assiette/helpers.rb', line 22

def assiette_stylesheet_tag(path)
  tag.link(rel: "stylesheet", href: assiette_asset_path(path),
    integrity: assiette_asset_integrity(path), crossorigin: "anonymous")
end