class TurboDevAssets
Cheat and bypass Rails in development mode if the client attempts to download a static asset that's already been downloaded.
Also ensures that assets are not cached in development mode. Around Chrome 29, the behavior of `must-revalidate` changed and would often not request assets that had changed.
To use, include in your project and add the following to development.rb: require 'middleware/turbo_dev' config.middleware.insert 0, Middleware::TurboDev
Constants
- VERSION
Public Class Methods
new(app, settings={})
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# File lib/turbo_dev_assets.rb, line 15 def initialize(app, settings={}) @app = app end
Public Instance Methods
call(env)
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# File lib/turbo_dev_assets.rb, line 19 def call(env) is_asset = (env['REQUEST_PATH'] =~ /^#{Rails.application.config.assets.prefix}\//) # hack to bypass all middleware if serving assets, a lot faster 4.5 seconds -> 1.5 seconds if (etag = env['HTTP_IF_NONE_MATCH']) && is_asset name = $' etag = etag.gsub "\"", "" asset = Rails.application.assets.find_asset(name) if asset && asset.digest == etag return [304,{},[]] end end status, headers, response = @app.call(env) headers['Cache-Control'] = 'no-cache' if is_asset [status, headers, response] end