Module: Grape::DSL::InsideRoute

Extended by:
ActiveSupport::Concern
Includes:
Settings
Included in:
Endpoint
Defined in:
lib/grape/dsl/inside_route.rb

Defined Under Namespace

Modules: PostBeforeFilter Classes: MethodNotYetAvailable

Instance Attribute Summary

Attributes included from Settings

#inheritable_setting, #top_level_setting

Class Method Summary collapse

Instance Method Summary collapse

Methods included from 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

Class Method Details

.post_filter_methods(type) ⇒ Module

Returns A module containing method overrides suitable for the position in the filter evaluation sequence denoted by type. This defaults to an empty module if no overrides are defined for the given filter type.

Parameters:

  • type (Symbol) —

    The type of filter for which evaluation has been completed

Returns:

  • (Module) —

    A module containing method overrides suitable for the position in the filter evaluation sequence denoted by type. This defaults to an empty module if no overrides are defined for the given filter type.



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# File 'lib/grape/dsl/inside_route.rb', line 19

def self.post_filter_methods(type)
  @post_filter_modules ||= { before: PostBeforeFilter }
  @post_filter_modules[type]
end

Instance Method Details

#body(value = nil) ⇒ Object

Allows you to define the response body as something other than the return value.

Examples:

get '/body' do
  body "Body"
  "Not the Body"
end

GET /body # => "Body"


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# File 'lib/grape/dsl/inside_route.rb', line 182

def body(value = nil)
  if value
    @body = value
  elsif value == false
    @body = ''
    status 204
  else
    @body
  end
end

#content_type(val = nil) ⇒ Object

Set response content-type



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# File 'lib/grape/dsl/inside_route.rb', line 152

def content_type(val = nil)
  if val
    header(Grape::Http::Headers::CONTENT_TYPE, val)
  else
    header[Grape::Http::Headers::CONTENT_TYPE]
  end
end

#cookies ⇒ Object

Set or get a cookie

Examples:

cookies[:mycookie] = 'mycookie val'
cookies['mycookie-string'] = 'mycookie string val'
cookies[:more] = { value: '123', expires: Time.at(0) }
cookies.delete :more


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# File 'lib/grape/dsl/inside_route.rb', line 168

def cookies
  @cookies ||= Cookies.new
end

#declared ⇒ Object

A filtering method that will return a hash consisting only of keys that have been declared by a ‘params` statement against the current/target endpoint or parent namespaces.

options. ‘:include_parent_namespaces` defaults to true, hence must be set to false if you want only to return params declared against the current/target endpoint.

Parameters:

  • params (Hash) —

    The initial hash to filter. Usually this will just be ‘params`

  • options (Hash) —

    Can pass ‘:include_missing`, `:stringify` and `:include_parent_namespaces`

See Also:

  • Grape::DSL::InsideRoute.+PostBeforeFilter+PostBeforeFilter#declared+


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# File 'lib/grape/dsl/inside_route.rb', line 70

def declared(*)
  fail MethodNotYetAvailable, '#declared is not available prior to parameter validation.'
end

#entity_class_for_obj(object, options) ⇒ Class

Attempt to locate the Entity class for a given object, if not given explicitly. This is done by looking for the presence of Klass::Entity, where Klass is the class of the ‘object` parameter, or one of its ancestors.

Parameters:

  • object (Object) —

    the object to locate the Entity class for

  • options (Hash)

Options Hash (options):

  • :with (Class) —

    the explicit entity class to use

Returns:

  • (Class) —

    the located Entity class, or nil if none is found



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# File 'lib/grape/dsl/inside_route.rb', line 294

def entity_class_for_obj(object, options)
  entity_class = options.delete(:with)

  if entity_class.nil?
    # entity class not explicitely defined, auto-detect from relation#klass or first object in the collection
    object_class = if object.respond_to?(:klass)
                     object.klass
                   else
                     object.respond_to?(:first) ? object.first.class : object.class
                   end

    object_class.ancestors.each do |potential|
      entity_class ||= (Grape::DSL::Configuration.stacked_hash_to_hash(namespace_stackable(:representations)) || {})[potential]
    end

    entity_class ||= object_class.const_get(:Entity) if object_class.const_defined?(:Entity) && object_class.const_get(:Entity).respond_to?(:represent)
  end

  entity_class
end

#entity_representation_for(entity_class, object, options) ⇒ Object

Returns the representation of the given object as done through the given entity_class.

Returns:

  • the representation of the given object as done through the given entity_class.



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# File 'lib/grape/dsl/inside_route.rb', line 317

def entity_representation_for(entity_class, object, options)
  embeds = { env: env }
  embeds[:version] = env[Grape::Env::API_VERSION] if env[Grape::Env::API_VERSION]
  entity_class.represent(object, embeds.merge(options))
end

#error!(message, status = nil, headers = nil) ⇒ Object

End the request and display an error to the end user with the specified message.

Parameters:

  • message (String) —

    The message to display.

  • status (Integer) (defaults to: nil) —

    the HTTP Status Code. Defaults to default_error_status, 500 if not set.



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# File 'lib/grape/dsl/inside_route.rb', line 84

def error!(message, status = nil, headers = nil)
  self.status(status || namespace_inheritable(:default_error_status))
  throw :error, message: message, status: self.status, headers: headers
end

#file(value = nil) ⇒ Object

Allows you to define the response as a file-like object.

Examples:

get '/file' do
  file FileStreamer.new(...)
end

GET /file # => "contents of file"


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# File 'lib/grape/dsl/inside_route.rb', line 201

def file(value = nil)
  if value
    @file = Grape::Util::FileResponse.new(value)
  else
    @file
  end
end

#header(key = nil, val = nil) ⇒ Object

Set an individual header or retrieve all headers that have been set.



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# File 'lib/grape/dsl/inside_route.rb', line 143

def header(key = nil, val = nil)
  if key
    val ? @header[key.to_s] = val : @header.delete(key.to_s)
  else
    @header
  end
end

#present(*args) ⇒ Object

Allows you to make use of Grape Entities by setting the response body to the serializable hash of the entity provided in the ‘:with` option. This has the added benefit of automatically passing along environment and version information to the serialization, making it very easy to do conditional exposures. See Entity docs for more info.

Examples:


get '/users/:id' do
  present User.find(params[:id]),
    with: API::Entities::User,
    admin: current_user.admin?
end


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# File 'lib/grape/dsl/inside_route.rb', line 246

def present(*args)
  options = args.count > 1 ? args.extract_options! : {}
  key, object = if args.count == 2 && args.first.is_a?(Symbol)
                  args
                else
                  [nil, args.first]
                end
  entity_class = entity_class_for_obj(object, options)

  root = options.delete(:root)

  representation = if entity_class
                     entity_representation_for(entity_class, object, options)
                   else
                     object
                   end

  representation = { root => representation } if root
  if key
    representation = (@body || {}).merge(key => representation)
  elsif entity_class.present? && @body
    fail ArgumentError, "Representation of type #{representation.class} cannot be merged." unless representation.respond_to?(:merge)
    representation = @body.merge(representation)
  end

  body representation
end

#redirect(url, options = {}) ⇒ Object

Redirect to a new url.

Parameters:

  • url (String) —

    The url to be redirect.

  • options (Hash) (defaults to: {}) —

    The options used when redirect. :permanent, default false. :body, default a short message including the URL.



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# File 'lib/grape/dsl/inside_route.rb', line 95

def redirect(url, options = {})
  permanent = options.fetch(:permanent, false)
  body_message = options.fetch(:body, nil)
  if permanent
    status 301
    body_message ||= "This resource has been moved permanently to #{url}."
  else
    if env[Grape::Http::Headers::HTTP_VERSION] == 'HTTP/1.1' && request.request_method.to_s.upcase != Grape::Http::Headers::GET
      status 303
      body_message ||= "An alternate resource is located at #{url}."
    else
      status 302
      body_message ||= "This resource has been moved temporarily to #{url}."
    end
  end
  header 'Location', url
  content_type 'text/plain'
  body body_message
end

#route ⇒ Object

Returns route information for the current request.

Examples:


desc "Returns the route description."
get '/' do
  route.route_description
end


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# File 'lib/grape/dsl/inside_route.rb', line 282

def route
  env[Grape::Env::RACK_ROUTING_ARGS][:route_info]
end

#status(status = nil) ⇒ Object

Set or retrieve the HTTP status code.

Parameters:

  • status (Integer) (defaults to: nil) —

    The HTTP Status Code to return for this request.



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# File 'lib/grape/dsl/inside_route.rb', line 118

def status(status = nil)
  case status
  when Symbol
    if Rack::Utils::SYMBOL_TO_STATUS_CODE.keys.include?(status)
      @status = Rack::Utils.status_code(status)
    else
      fail ArgumentError, "Status code :#{status} is invalid."
    end
  when Fixnum
    @status = status
  when nil
    return @status if @status
    case request.request_method.to_s.upcase
    when Grape::Http::Headers::POST
      201
    else
      200
    end
  else
    fail ArgumentError, 'Status code must be Fixnum or Symbol.'
  end
end

#stream(value = nil) ⇒ Object

Allows you to define the response as a streamable object.

If Content-Length and Transfer-Encoding are blank (among other conditions), Rack assumes this response can be streamed in chunks.

See:

Examples:

get '/stream' do
  stream FileStreamer.new(...)
end

GET /stream # => "chunked contents of file"


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# File 'lib/grape/dsl/inside_route.rb', line 224

def stream(value = nil)
  header 'Content-Length', nil
  header 'Transfer-Encoding', nil
  header 'Cache-Control', 'no-cache' # Skips ETag generation (reading the response up front)
  file(value)
end

#version ⇒ Object

The API version as specified in the URL.



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# File 'lib/grape/dsl/inside_route.rb', line 75

def version
  env[Grape::Env::API_VERSION]
end