Class: Grape::Endpoint

Inherits:
Object
  • Object
show all
Includes:
DSL::InsideRoute, DSL::Settings
Defined in:
lib/grape/endpoint.rb

Overview

An Endpoint is the proxy scope in which all routing blocks are executed. In other words, any methods on the instance level of this class may be called from inside a ‘get`, `post`, etc.

Instance Attribute Summary collapse

Attributes included from DSL::Settings

#inheritable_setting, #top_level_setting

Class Method Summary collapse

Instance Method Summary collapse

Methods included from DSL::InsideRoute

#body, #content_type, #cookies, #declared, #entity_class_for_obj, #entity_representation_for, #error!, #file, post_filter_methods, #present, #redirect, #route, #status, #stream, #version

Methods included from DSL::Headers

#header

Methods included from DSL::Settings

#api_class_setting, #get_or_set, #global_setting, #namespace_end, #namespace_inheritable, #namespace_inheritable_to_nil, #namespace_setting, #namespace_stackable, #namespace_stackable_with_hash, #namespace_start, #route_end, #route_setting, #unset, #unset_api_class_setting, #unset_global_setting, #unset_namespace_inheritable, #unset_namespace_setting, #unset_namespace_stackable, #unset_route_setting, #within_namespace

Constructor Details

#initialize(new_settings, options = {}, &block) ⇒ Endpoint

Returns a new instance of Endpoint.



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# File 'lib/grape/endpoint.rb', line 72

def initialize(new_settings, options = {}, &block)
  require_option(options, :path)
  require_option(options, :method)

  self.inheritable_setting = new_settings.point_in_time_copy

  route_setting(:saved_declared_params, namespace_stackable(:declared_params))
  route_setting(:saved_validations, namespace_stackable(:validations))

  namespace_stackable(:representations, []) unless namespace_stackable(:representations)
  namespace_inheritable(:default_error_status, 500) unless namespace_inheritable(:default_error_status)

  @options = options

  @options[:path] = Array(options[:path])
  @options[:path] << '/' if options[:path].empty?

  @options[:method] = Array(options[:method])
  @options[:route_options] ||= {}

  @lazy_initialize_lock = Mutex.new

  return unless block_given?

  @source = block
  @block = self.class.generate_api_method(method_name, &block)
end

Instance Attribute Details

#block ⇒ Object

Returns the value of attribute block.



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# File 'lib/grape/endpoint.rb', line 10

def block
  @block
end

#env ⇒ Object (readonly)

Returns the value of attribute env.



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# File 'lib/grape/endpoint.rb', line 11

def env
  @env
end

#headers ⇒ Object (readonly)

Returns the value of attribute headers.



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# File 'lib/grape/endpoint.rb', line 11

def headers
  @headers
end

#options ⇒ Object

Returns the value of attribute options.



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# File 'lib/grape/endpoint.rb', line 10

def options
  @options
end

#params ⇒ Object (readonly)

Returns the value of attribute params.



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# File 'lib/grape/endpoint.rb', line 11

def params
  @params
end

#request ⇒ Object (readonly)

Returns the value of attribute request.



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# File 'lib/grape/endpoint.rb', line 11

def request
  @request
end

#source ⇒ Object

Returns the value of attribute source.



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# File 'lib/grape/endpoint.rb', line 10

def source
  @source
end

Class Method Details

.before_each(new_setup = false, &block) ⇒ Object 



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# File 'lib/grape/endpoint.rb', line 22

def before_each(new_setup = false, &block)
  @before_each ||= []
  if new_setup == false
    if block_given?
      @before_each << block
    else
      return @before_each
    end
  else
    @before_each = [new_setup]
  end
end

.generate_api_method(method_name, &block) ⇒ Proc

This method is part of a private API. You should avoid using this method if possible, as it may be removed or be changed in the future.

Create an UnboundMethod that is appropriate for executing an endpoint route.

The unbound method allows explicit calls to return without raising a LocalJumpError. The method will be removed, but a Proc reference to it will be returned. The returned Proc expects a single argument: the instance of Endpoint to bind to the method during the call.

Parameters:

  • method_name (String, Symbol)

Returns:

  • (Proc)

Raises:

  • (NameError) —

    an instance method with the same name already exists



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# File 'lib/grape/endpoint.rb', line 55

def generate_api_method(method_name, &block)
  if instance_methods.include?(method_name.to_sym) || instance_methods.include?(method_name.to_s)
    fail NameError.new("method #{method_name.inspect} already exists and cannot be used as an unbound method name")
  end

  define_method(method_name, &block)
  method = instance_method(method_name)
  remove_method(method_name)

  proc do |endpoint_instance|
    ActiveSupport::Notifications.instrument('endpoint_render.grape', endpoint: endpoint_instance) do
      method.bind(endpoint_instance).call
    end
  end
end

.new(*args, &block) ⇒ Object 



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# File 'lib/grape/endpoint.rb', line 14

def new(*args, &block)
  if self == Endpoint
    Class.new(Endpoint).new(*args, &block)
  else
    super
  end
end

.run_before_each(endpoint) ⇒ Object 



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# File 'lib/grape/endpoint.rb', line 35

def run_before_each(endpoint)
  superclass.run_before_each(endpoint) unless self == Endpoint
  before_each.each do |blk|
    blk.call(endpoint) if blk.respond_to? :call
  end
end

Instance Method Details

#call(env) ⇒ Object 



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# File 'lib/grape/endpoint.rb', line 206

def call(env)
  lazy_initialize!
  dup.call!(env)
end

#call!(env) ⇒ Object 



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# File 'lib/grape/endpoint.rb', line 211

def call!(env)
  env[Grape::Env::API_ENDPOINT] = self
  @env = env
  @app.call(env)
end

#compile_path(prepared_path, anchor = true, requirements = {}) ⇒ Object 



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# File 'lib/grape/endpoint.rb', line 199

def compile_path(prepared_path, anchor = true, requirements = {})
  endpoint_options = {}
  endpoint_options[:version] = /#{namespace_inheritable(:version).join('|')}/ if namespace_inheritable(:version)
  endpoint_options.merge!(requirements)
  Rack::Mount::Strexp.compile(prepared_path, endpoint_options, %w( / . ? ), anchor)
end

#endpoints ⇒ Object

Return the collection of endpoints within this endpoint. This is the case when an Grape::API mounts another Grape::API.



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# File 'lib/grape/endpoint.rb', line 219

def endpoints
  options[:app].endpoints if options[:app] && options[:app].respond_to?(:endpoints)
end

#equals?(e) ⇒ Boolean

Returns:

  • (Boolean) 


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# File 'lib/grape/endpoint.rb', line 223

def equals?(e)
  (options == e.options) && (inheritable_setting.to_hash == e.inheritable_setting.to_hash)
end

#method_name ⇒ Object 



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# File 'lib/grape/endpoint.rb', line 104

def method_name
  [options[:method],
   Namespace.joined_space(namespace_stackable(:namespace)),
   (namespace_stackable(:mount_path) || []).join('/'),
   options[:path].join('/')
  ].join(' ')
end

#mount_in(route_set) ⇒ Object 



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# File 'lib/grape/endpoint.rb', line 122

def mount_in(route_set)
  if endpoints
    endpoints.each do |e|
      e.mount_in(route_set)
    end
  else
    reset_routes!

    routes.each do |route|
      methods = [route.route_method]
      if !namespace_inheritable(:do_not_route_head) && route.route_method == Grape::Http::Headers::GET
        methods << Grape::Http::Headers::HEAD
      end
      methods.each do |method|
        route_set.add_route(self, {
                              path_info: route.route_compiled,
                              request_method: method
                            }, route_info: route)
      end
    end
  end
end

#namespace ⇒ Object 



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# File 'lib/grape/endpoint.rb', line 195

def namespace
  @namespace ||= Namespace.joined_space_path(namespace_stackable(:namespace))
end

#prepare_path(path) ⇒ Object 



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# File 'lib/grape/endpoint.rb', line 190

def prepare_path(path)
  path_settings = inheritable_setting.to_hash[:namespace_stackable].merge(inheritable_setting.to_hash[:namespace_inheritable])
  Path.prepare(path, namespace, path_settings)
end

#prepare_routes ⇒ Object 



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# File 'lib/grape/endpoint.rb', line 168

def prepare_routes
  options[:method].map do |method|
    options[:path].map do |path|
      prepared_path = prepare_path(path)
      anchor = options[:route_options].fetch(:anchor, true)
      path = compile_path(prepared_path, anchor && !options[:app], prepare_routes_requirements)
      request_method = (method.to_s.upcase unless method == :any)

      Route.new(options[:route_options].clone.merge(
                  prefix: namespace_inheritable(:root_prefix),
                  version: namespace_inheritable(:version) ? namespace_inheritable(:version).join('|') : nil,
                  namespace: namespace,
                  method: request_method,
                  path: prepared_path,
                  params: prepare_routes_path_params(path),
                  compiled: path,
                  settings: inheritable_setting.route.except(:saved_declared_params, :saved_validations)
      ))
    end
  end.flatten
end

#prepare_routes_path_params(path) ⇒ Object 



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# File 'lib/grape/endpoint.rb', line 153

def prepare_routes_path_params(path)
  path_params = {}

  # named parameters in the api path
  regex = Rack::Mount::RegexpWithNamedGroups.new(path)
  named_params = regex.named_captures.map { |nc| nc[0] } - %w(version format)
  named_params.each { |named_param| path_params[named_param] = '' }

  # route parameters declared via desc or appended to the api declaration
  route_params = options[:route_options][:params]
  path_params.merge! route_params if route_params

  path_params
end

#prepare_routes_requirements ⇒ Object 



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# File 'lib/grape/endpoint.rb', line 145

def prepare_routes_requirements
  endpoint_requirements = options[:route_options][:requirements] || {}
  all_requirements = (namespace_stackable(:namespace).map(&:requirements) << endpoint_requirements)
  all_requirements.reduce({}) do |base_requirements, single_requirements|
    base_requirements.merge!(single_requirements)
  end
end

#require_option(options, key) ⇒ Object 



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# File 'lib/grape/endpoint.rb', line 100

def require_option(options, key)
  fail Grape::Exceptions::MissingOption.new(key) unless options.key?(key)
end

#reset_routes! ⇒ Object 



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# File 'lib/grape/endpoint.rb', line 116

def reset_routes!
  endpoints.each(&:reset_routes!) if endpoints
  @namespace = nil
  @routes = nil
end

#routes ⇒ Object 



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# File 'lib/grape/endpoint.rb', line 112

def routes
  @routes ||= endpoints ? endpoints.collect(&:routes).flatten : prepare_routes
end