Module: Grape::Middleware::PrecomputedContentTypes

Included in:
Error, Formatter, Versioner::Base
Defined in:
lib/grape/middleware/precomputed_content_types.rb

Overview

Include in a middleware subclass that needs content-type negotiation. Provides content_types / mime_types / content_type_for / content_type resolved from config.content_types and config.format — so the consuming middleware’s Options Data class must declare both fields. Warms those caches on the parent instance at initialization so per-request dups inherit them (avoiding ~1 µs/request of with_indifferent_access recomputation).

Opt-in: plain Grape::Middleware::Base subclasses that don’t need content-type-aware helpers don’t pay for them.

Instance Method Summary collapse

Instance Method Details

#content_type ⇒ Object 



35
36
37
 
# File 'lib/grape/middleware/precomputed_content_types.rb', line 35

def content_type
  content_type_for(env[Grape::Env::API_FORMAT] || config.format) || 'text/html'
end

#content_type_for(format) ⇒ Object 



31
32
33
 
# File 'lib/grape/middleware/precomputed_content_types.rb', line 31

def content_type_for(format)
  content_types_indifferent_access[format]
end

#content_types ⇒ Object 



23
24
25
 
# File 'lib/grape/middleware/precomputed_content_types.rb', line 23

def content_types
  @content_types ||= Grape::ContentTypes.content_types_for(config.content_types)
end

#initialize(app, **options) ⇒ Object 



16
17
18
19
20
21
 
# File 'lib/grape/middleware/precomputed_content_types.rb', line 16

def initialize(app, **options)
  super
  content_types
  mime_types
  content_types_indifferent_access
end

#mime_types ⇒ Object 



27
28
29
 
# File 'lib/grape/middleware/precomputed_content_types.rb', line 27

def mime_types
  @mime_types ||= Grape::ContentTypes.mime_types_for(content_types)
end