diff options
Diffstat (limited to 'lib/rack/builder.rb')
| -rw-r--r-- | lib/rack/builder.rb | 11 |
1 files changed, 9 insertions, 2 deletions
diff --git a/lib/rack/builder.rb b/lib/rack/builder.rb index 5250aff3..f11c66bc 100644 --- a/lib/rack/builder.rb +++ b/lib/rack/builder.rb @@ -51,7 +51,7 @@ module Rack end def initialize(default_app = nil, &block) - @use, @map, @run, @warmup = [], nil, default_app, nil + @use, @map, @run, @warmup, @freeze_app = [], nil, default_app, nil, false instance_eval(&block) if block_given? end @@ -141,10 +141,17 @@ module Rack @map[path] = block end + # Freeze the app (set using run) and all middleware instances when building the application + # in to_app. + def freeze_app + @freeze_app = true + end + def to_app app = @map ? generate_map(@run, @map) : @run fail "missing run or map statement" unless app - app = @use.reverse.inject(app) { |a,e| e[a] } + app.freeze if @freeze_app + app = @use.reverse.inject(app) { |a,e| e[a].tap { |x| x.freeze if @freeze_app } } @warmup.call(app) if @warmup app end |