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, #configuration, #content_type, #cookies, #declared, #entity_class_for_obj, #entity_representation_for, #error!, #file, post_filter_methods, #present, #redirect, #return_no_content, #route, #sendfile, #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_reverse_stackable, #namespace_reverse_stackable_with_hash, #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 = {}) { ... } ⇒ Endpoint

Note:

This happens at the time of API definition, so in this context the

Create a new endpoint. endpoint does not know if it will be mounted under a different endpoint.

Parameters:

  • new_settings (InheritableSetting)

    settings to determine the params, validations, and other properties from.

  • options (Hash) (defaults to: {})

    attributes of this endpoint

Options Hash (options):

  • path (String or Array)

    the path to this endpoint, within the current scope.

  • method (String or Array)

    which HTTP method(s) can be used to reach this endpoint.

  • route_options (Hash)

Yields:

  • a block defining what your API should do when this endpoint is hit


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# File 'lib/grape/endpoint.rb', line 77

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

  self.inheritable_setting = new_settings.point_in_time_copy

  # now +namespace_stackable(:declared_params)+ contains all params defined for
  # this endpoint and its parents, but later it will be cleaned up,
  # see +reset_validations!+ in lib/grape/dsl/validations.rb
  route_setting(:declared_params, namespace_stackable(:declared_params).flatten)
  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
  @lazy_initialized = nil
  @block = nil

  @status = nil
  @stream = nil
  @body = nil
  @proc = nil

  return unless block_given?

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

Instance Attribute Details

#blockObject

Returns the value of attribute block


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# File 'lib/grape/endpoint.rb', line 12

def block
  @block
end

#envObject (readonly)

Returns the value of attribute env


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# File 'lib/grape/endpoint.rb', line 13

def env
  @env
end

#headersObject (readonly)

Returns the value of attribute headers


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# File 'lib/grape/endpoint.rb', line 13

def headers
  @headers
end

#optionsObject

Returns the value of attribute options


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# File 'lib/grape/endpoint.rb', line 12

def options
  @options
end

#paramsObject (readonly)

Returns the value of attribute params


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# File 'lib/grape/endpoint.rb', line 13

def params
  @params
end

#requestObject (readonly)

Returns the value of attribute request


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# File 'lib/grape/endpoint.rb', line 13

def request
  @request
end

#sourceObject

Returns the value of attribute source


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# File 'lib/grape/endpoint.rb', line 12

def source
  @source
end

Class Method Details

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


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# File 'lib/grape/endpoint.rb', line 20

def before_each(new_setup = false, &block)
  @before_each ||= []
  if new_setup == false
    return @before_each unless block_given?
    @before_each << block
  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 48

def generate_api_method(method_name, &block)
  if method_defined?(method_name)
    raise 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 16

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

.run_before_each(endpoint) ⇒ Object


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# File 'lib/grape/endpoint.rb', line 30

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

Instance Method Details

#call(env) ⇒ Object


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

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

#call!(env) ⇒ Object


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# File 'lib/grape/endpoint.rb', line 228

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

#endpointsObject

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 236

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 240

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

#inherit_settings(namespace_stackable) ⇒ Object

Update our settings from a given set of stackable parameters. Used when the endpoint's API is mounted under another one.


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# File 'lib/grape/endpoint.rb', line 117

def inherit_settings(namespace_stackable)
  inheritable_setting.route[:saved_validations] += namespace_stackable[:validations]
  parent_declared_params = namespace_stackable[:declared_params]

  if parent_declared_params
    inheritable_setting.route[:declared_params].concat(parent_declared_params.flatten)
  end

  endpoints && endpoints.each { |e| e.inherit_settings(namespace_stackable) }
end

#map_routesObject


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# File 'lib/grape/endpoint.rb', line 210

def map_routes
  options[:method].map { |method| options[:path].map { |path| yield method, path } }
end

#merge_route_options(**default) ⇒ Object


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

def merge_route_options(**default)
  options[:route_options].clone.merge!(**default)
end

#method_nameObject


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# File 'lib/grape/endpoint.rb', line 132

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

#mount_in(router) ⇒ Object


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# File 'lib/grape/endpoint.rb', line 150

def mount_in(router)
  if endpoints
    endpoints.each { |e| e.mount_in(router) }
  else
    reset_routes!
    routes.each do |route|
      methods = [route.request_method]
      if !namespace_inheritable(:do_not_route_head) && route.request_method == Grape::Http::Headers::GET
        methods << Grape::Http::Headers::HEAD
      end
      methods.each do |method|
        unless route.request_method == method
          route = Grape::Router::Route.new(method, route.origin, **route.attributes.to_h)
        end
        router.append(route.apply(self))
      end
    end
  end
end

#namespaceObject


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

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

#prepare_default_route_attributesObject


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# File 'lib/grape/endpoint.rb', line 188

def prepare_default_route_attributes
  {
    namespace: namespace,
    version: prepare_version,
    requirements: prepare_routes_requirements,
    prefix: namespace_inheritable(:root_prefix),
    anchor: options[:route_options].fetch(:anchor, true),
    settings: inheritable_setting.route.except(:declared_params, :saved_validations),
    forward_match: options[:forward_match]
  }
end

#prepare_path(path) ⇒ Object


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# File 'lib/grape/endpoint.rb', line 214

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_requirementsObject


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# File 'lib/grape/endpoint.rb', line 180

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

#prepare_versionObject


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# File 'lib/grape/endpoint.rb', line 200

def prepare_version
  version = namespace_inheritable(:version) || []
  return if version.empty?
  version.length == 1 ? version.first.to_s : version
end

#require_option(options, key) ⇒ Object


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# File 'lib/grape/endpoint.rb', line 128

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

#reset_routes!Object


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# File 'lib/grape/endpoint.rb', line 144

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

#routesObject


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# File 'lib/grape/endpoint.rb', line 140

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

#to_routesObject


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# File 'lib/grape/endpoint.rb', line 170

def to_routes
  route_options = prepare_default_route_attributes
  map_routes do |method, path|
    path = prepare_path(path)
    params = merge_route_options(**route_options.merge(suffix: path.suffix))
    route = Router::Route.new(method, path.path, **params)
    route.apply(self)
  end.flatten
end