Class: Rack::Relativize

Inherits:
Object
  • Object
show all
Defined in:
lib/rack/relativize/version.rb,
lib/rack/relativize.rb

Constant Summary collapse

VERSION = 
"0.0.1"

Instance Method Summary collapse

Constructor Details

#initialize(app) ⇒ Relativize

Returns a new instance of Relativize.



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# File 'lib/rack/relativize.rb', line 6

def initialize(app)
  @app        = app
end

Instance Method Details

#call(env) ⇒ Object 



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# File 'lib/rack/relativize.rb', line 10

def call(env)
  status, headers, enumerable_body = original_response = @app.call(env.dup)

  if headers["Content-Type"].to_s.match(/(ht|x)ml/) # FIXME: Use another pattern
    type = :html
  elsif headers["Content-Type"].to_s.match(/css/)
    type = :css
  else
    return original_response
  end

  path    = env['PATH_INFO']
  raise  "PATH_INFO is Empty" if path == ""

  content = join_body(enumerable_body)

  case type
  when :html
    processed_body = content.gsub(/(<[^>]+\s+(src|href))=(['"]?)(\/.*?)\3([ >])/) do
      $1 + '=' + $3 + relative_path_to(path, $4) + $3 + $5
    end
  when :css
    processed_body = content.gsub(/url\((['"]?)(\/.*?)\1\)/) do
      'url(' + $1 + relative_path_to(path, $2) + $1 + ')'
    end
  else
    raise RuntimeError.new(
      "The relativize_paths needs to know the type of content to " +
        "process. Pass :type => :html for HTML or :type => :css for CSS."
    )
  end
  processed_headers = headers.merge({
      "Content-Length" => processed_body.size.to_s
    })
  [status, processed_headers, [processed_body]]
end