Class: Grape::Endpoint

Inherits:
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, #error!, #header, #present, #redirect, #route, #status, #version

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_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 51

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] ||= {}

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

Instance Attribute Details

#block ⇒ Object

Returns the value of attribute block.



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# File 'lib/grape/endpoint.rb', line 9

def block
  @block
end

#env ⇒ Object (readonly)

Returns the value of attribute env.



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

def env
  @env
end

#headers ⇒ Object (readonly)

Returns the value of attribute headers.



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

def headers
  @headers
end

#options ⇒ Object

Returns the value of attribute options.



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# File 'lib/grape/endpoint.rb', line 9

def options
  @options
end

#params ⇒ Object (readonly)

Returns the value of attribute params.



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

def params
  @params
end

#request ⇒ Object (readonly)

Returns the value of attribute request.



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

def request
  @request
end

#source ⇒ Object

Returns the value of attribute source.



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# File 'lib/grape/endpoint.rb', line 9

def source
  @source
end

Class Method Details

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



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# File 'lib/grape/endpoint.rb', line 15

def before_each(new_setup = false, &block)
  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 40

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 { |endpoint_instance| method.bind(endpoint_instance).call }
end

Instance Method Details

#call(env) ⇒ Object 



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# File 'lib/grape/endpoint.rb', line 183

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

#call!(env) ⇒ Object 



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# File 'lib/grape/endpoint.rb', line 187

def call!(env)
  extend helpers

  env['api.endpoint'] = self
  if options[:app]
    options[:app].call(env)
  else
    builder = build_middleware
    builder.run lambda { |arg| run(arg) }
    builder.call(env)
  end
end

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



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# File 'lib/grape/endpoint.rb', line 176

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 202

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

#method_name ⇒ Object 



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# File 'lib/grape/endpoint.rb', line 81

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 99

def mount_in(route_set)
  if endpoints
    endpoints.each do |e|
      e.mount_in(route_set)
    end
  else
    @routes = nil

    routes.each do |route|
      methods = [route.route_method]
      if !namespace_inheritable(:do_not_route_head) && route.route_method == 'GET'
        methods << '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 172

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 167

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 145

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 130

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 122

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 77

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 93

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

#routes ⇒ Object 



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# File 'lib/grape/endpoint.rb', line 89

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