class Grape::Middleware::Base
Constants
- TEXT_HTML
Attributes
app[R]
env[R]
options[R]
Public Class Methods
new(app, *options)
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@param [Rack Application] app The standard argument for a Rack
middleware. @param [Hash] options A hash of options, simply stored for use by subclasses.
# File lib/grape/middleware/base.rb, line 18 def initialize(app, *options) @app = app @options = options.any? ? default_options.merge(options.shift) : default_options @app_response = nil end
Public Instance Methods
after()
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@abstract Called after the application is called in the middleware lifecycle. @return [Response, nil] a Rack
SPEC response or nil to call the application afterwards.
# File lib/grape/middleware/base.rb, line 58 def after; end
before()
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@abstract Called before the application is called in the middleware lifecycle.
# File lib/grape/middleware/base.rb, line 53 def before; end
call(env)
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# File lib/grape/middleware/base.rb, line 28 def call(env) dup.call!(env).to_a end
call!(env)
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# File lib/grape/middleware/base.rb, line 32 def call!(env) @env = env before begin @app_response = @app.call(@env) ensure begin after_response = after rescue StandardError => e warn "caught error of type #{e.class} in after callback inside #{self.class.name} : #{e.message}" raise e end end response = after_response || @app_response merge_headers response response end
content_type()
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# File lib/grape/middleware/base.rb, line 74 def content_type content_type_for(env[Grape::Env::API_FORMAT] || options[:format]) || TEXT_HTML end
content_type_for(format)
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# File lib/grape/middleware/base.rb, line 66 def content_type_for(format) HashWithIndifferentAccess.new(content_types)[format] end
content_types()
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# File lib/grape/middleware/base.rb, line 70 def content_types ContentTypes.content_types_for(options[:content_types]) end
default_options()
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# File lib/grape/middleware/base.rb, line 24 def default_options {} end
mime_types()
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# File lib/grape/middleware/base.rb, line 78 def mime_types @mime_type ||= content_types.each_pair.with_object({}) do |(k, v), types_without_params| types_without_params[v.split(';').first] = k end end
response()
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# File lib/grape/middleware/base.rb, line 60 def response return @app_response if @app_response.is_a?(Rack::Response) Rack::Response.new(@app_response[2], @app_response[0], @app_response[1]) end
Private Instance Methods
merge_headers(response)
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# File lib/grape/middleware/base.rb, line 86 def merge_headers(response) return unless headers.is_a?(Hash) case response when Rack::Response then response.headers.merge!(headers) when Array then response[1].merge!(headers) end end