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Class: ActionDispatch::Response

Relationships & Source Files
Namespace Children
Classes:
Buffer, ContentTypeHeader, FileBody, RackBody
Extension / Inclusion / Inheritance Descendants
Subclasses:
ActionController::LiveTestResponse, TestResponse, ActionController::Live::Response
Super Chains via Extension / Inclusion / Inheritance
Instance Chain:
self, MonitorMixin, Http::Cache::Response, Http::FilterRedirect, Rack::Response::Helpers
Inherits: Object
Defined in: actionpack/lib/action_dispatch/http/response.rb

Overview

Represents an HTTP response generated by a controller action. Use it to retrieve the current state of the response, or customize the response. It can either represent a real HTTP response (i.e. one that is meant to be sent back to the web browser) or a TestResponse (i.e. one that is generated from integration tests).

The Response object for the current request is exposed on controllers as ActionController::Metal#response. ::ActionController::Metal also provides a few additional methods that delegate to attributes of the Response such as ActionController::Metal#headers.

Integration tests will likely also want to inspect responses in more detail. Methods such as Integration::RequestHelpers#get and Integration::RequestHelpers#post return instances of TestResponse (which inherits from Response) for this purpose.

For example, the following demo integration test prints the body of the controller response to the console:

class DemoControllerTest < ActionDispatch::IntegrationTest
  def test_print_root_path_to_console
    get('/')
    puts response.body
  end
end

Constant Summary

Http::FilterRedirect - Included

FILTERED

Http::Cache::Response - Included

DATE, DEFAULT_CACHE_CONTROL, LAST_MODIFIED, MUST_REVALIDATE, NO_CACHE, NO_STORE, PRIVATE, PUBLIC, SPECIAL_KEYS

Class Attribute Summary

Class Method Summary

Instance Attribute Summary

Http::Cache::Response - Included

#cache_control, #date, #date=, #date?,
#etag=

This method sets a weak ETag validator on the response so browsers and proxies may cache the response, keyed on the ETag.
#etag?, #last_modified, #last_modified=, #last_modified?, #strong_etag=,
#strong_etag?

True if an ETag is set, and it isn’t a weak validator (not preceded with W/).
#weak_etag=,
#weak_etag?

True if an ETag is set, and it’s a weak validator (preceded with W/).

Http::FilterRedirect - Included

#location_filter_match?

Instance Method Summary

Http::Cache::Response - Included

#cache_control_headers, #cache_control_segments, #generate_strong_etag, #generate_weak_etag, #handle_conditional_get!, #merge_and_normalize_cache_control!, #prepare_cache_control!

Http::FilterRedirect - Included

#location_filters, #filtered_location

Constructor Details

.new(status = 200, headers = nil, body = []) {|_self| ... } ⇒ Response

Yields:

  • (_self)

Yield Parameters:

  • _self (Response) —

    the object that the method was called on

[ GitHub ] 

  


# File 'actionpack/lib/action_dispatch/http/response.rb', line 169



def initialize(status = 200, headers = nil, body = [])
  super()

  @headers = Headers.new

  headers&.each do |key, value|
    @headers[key] = value
  end

  self.body, self.status = body, status

  @cv           = new_cond
  @committed    = false
  @sending      = false
  @sent         = false

  prepare_cache_control!

  yield self if block_given?
end


  







Class Attribute Details



  

    .default_charset   (rw)
    Also known as: #default_charset
  

  [ GitHub ]


  

  


# File 'actionpack/lib/action_dispatch/http/response.rb', line 86



cattr_accessor :default_charset, default: "utf-8"


  








  

    .default_headers   (rw)
    Also known as: #default_headers
  

  [ GitHub ]


  

  


# File 'actionpack/lib/action_dispatch/http/response.rb', line 87



cattr_accessor :default_headers


  







Class Method Details



  

    .create(status = 200, headers = {}, body = [], default_headers: self.default_headers)  
  

  [ GitHub ]


  

  


# File 'actionpack/lib/action_dispatch/http/response.rb', line 157



def self.create(status = 200, headers = {}, body = [], default_headers: self.default_headers)
  headers = merge_default_headers(headers, default_headers)
  new status, headers, body
end


  








  

    .merge_default_headers(original, default)  
  

  [ GitHub ]


  

  


# File 'actionpack/lib/action_dispatch/http/response.rb', line 162



def self.merge_default_headers(original, default)
  default.respond_to?(:merge) ? default.merge(original) : original
end


  







Instance Attribute Details



  

    #body   (rw)
  



  

    

Returns the content of the response as a string. This contains the contents of any calls to render.


  



  [ GitHub ]


  

  


# File 'actionpack/lib/action_dispatch/http/response.rb', line 316



def body
  @stream.body
end


  








  

    #body=(body)   (rw)
  



  

    

Allows you to manually set or override the response body.


  



  [ GitHub ]


  

  


# File 'actionpack/lib/action_dispatch/http/response.rb', line 325



def body=(body)
  if body.respond_to?(:to_path)
    @stream = body
  else
    synchronize do
      @stream = build_buffer self, munge_body_object(body)
    end
  end
end


  








  

    #charset   (rw)
  



  

    

The charset of the response. HTML wants to know the encoding of the content you’re giving them, so we need to send that along.


  



  [ GitHub ]


  

  


# File 'actionpack/lib/action_dispatch/http/response.rb', line 286



def charset
  header_info = parsed_content_type_header
  header_info.charset || self.class.default_charset
end


  








  

    #charset=(charset)   (rw)
  



  

    

Sets the HTTP character set. In case of nil parameter it sets the charset to .default_charset.



response.charset = 'utf-16' # => 'utf-16'
response.charset = nil      # => 'utf-8'


  



  [ GitHub ]


  

  


# File 'actionpack/lib/action_dispatch/http/response.rb', line 275



def charset=(charset)
  content_type = parsed_content_type_header.mime_type
  if false == charset
    set_content_type content_type, nil
  else
    set_content_type content_type, charset || self.class.default_charset
  end
end


  








  

    #committed?  ⇒ Boolean  (readonly)
  

  [ GitHub ]


  

  


# File 'actionpack/lib/action_dispatch/http/response.rb', line 229



def committed?; synchronize { @committed }; end


  








  

    #content_type   (rw)
  



  

    

Content type of response.


  



  [ GitHub ]


  

  


# File 'actionpack/lib/action_dispatch/http/response.rb', line 255



def content_type
  super.presence
end


  








  

    #content_type=(content_type)   (rw)
  



  

    

Sets the HTTP response’s content MIME type. For example, in the controller you could write this:



response.content_type = "text/plain"



If a character set has been defined for this response (see charset=) then the character set information will also be included in the content type information.


  



  [ GitHub ]


  

  


# File 'actionpack/lib/action_dispatch/http/response.rb', line 245



def content_type=(content_type)
  return unless content_type
  new_header_info = parse_content_type(content_type.to_s)
  prev_header_info = parsed_content_type_header
  charset = new_header_info.charset || prev_header_info.charset
  charset ||= self.class.default_charset unless prev_header_info.mime_type
  set_content_type new_header_info.mime_type, charset
end


  








  

    #default_charset   (rw)
  

  [ GitHub ]


  

  


# File 'actionpack/lib/action_dispatch/http/response.rb', line 86



cattr_accessor :default_charset, default: "utf-8"


  








  

    #default_headers   (rw)
  

  [ GitHub ]


  

  


# File 'actionpack/lib/action_dispatch/http/response.rb', line 87



cattr_accessor :default_headers


  








  

    #header   (readonly)
  



  

    

Alias for #headers.


  



  [ GitHub ]


  

  


# File 'actionpack/lib/action_dispatch/http/response.rb', line 71



alias_method :header, :headers


  








  

    #headers   (readonly)
    Also known as: #header
  



  

    

The headers for the response.



header["Content-Type"] # => "text/plain"
header["Content-Type"] = "application/json"
header["Content-Type"] # => "application/json"



Also aliased as headers.



headers["Content-Type"] # => "text/plain"
headers["Content-Type"] = "application/json"
headers["Content-Type"] # => "application/json"



Also aliased as #header for compatibility.


  



  [ GitHub ]


  

  


# File 'actionpack/lib/action_dispatch/http/response.rb', line 69



attr_reader :headers


  








  

    #request   (rw)
  



  

    

The request that the response is responding to.


  



  [ GitHub ]


  

  


# File 'actionpack/lib/action_dispatch/http/response.rb', line 51



attr_accessor :request


  








  

    #sending?  ⇒ Boolean  (readonly)
  

  [ GitHub ]


  

  


# File 'actionpack/lib/action_dispatch/http/response.rb', line 228



def sending?;   synchronize { @sending };   end


  








  

    #sending_file=(v)   (writeonly)
  

  [ GitHub ]


  

  


# File 'actionpack/lib/action_dispatch/http/response.rb', line 264



def sending_file=(v)
  if true == v
    self.charset = false
  end
end


  








  

    #sent?  ⇒ Boolean  (readonly)
  

  [ GitHub ]


  

  


# File 'actionpack/lib/action_dispatch/http/response.rb', line 230



def sent?;      synchronize { @sent };      end


  








  

    #status   (rw)
  



  

    

The HTTP status code.


  



  [ GitHub ]


  

  


# File 'actionpack/lib/action_dispatch/http/response.rb', line 54



attr_reader :status


  








  

    #status=(status)   (rw)
  



  

    

Sets the HTTP status code.


  



  [ GitHub ]


  

  


# File 'actionpack/lib/action_dispatch/http/response.rb', line 233



def status=(status)
  @status = Rack::Utils.status_code(status)
end


  








  

    #stream   (readonly)
  



  

    

The underlying body, as a streamable object.


  



  [ GitHub ]


  

  


# File 'actionpack/lib/action_dispatch/http/response.rb', line 167



attr_reader :stream


  







Instance Method Details



  

    #[]  
  

  [ GitHub ]


  

  


# File 'actionpack/lib/action_dispatch/http/response.rb', line 73



delegate :[], :[]=, to: :@headers


  








  

    #[]=  
  

  [ GitHub ]


  

  


# File 'actionpack/lib/action_dispatch/http/response.rb', line 73



delegate :[], :[]=, to: :@headers


  








  

    #_cache_control  
  



  

    

Aliasing these off because AD::Http::Cache::Response defines them.


  



  [ GitHub ]


  

  


# File 'actionpack/lib/action_dispatch/http/response.rb', line 91



alias :_cache_control :cache_control


  








  

    #_cache_control=  
  

  [ GitHub ]


  

  


# File 'actionpack/lib/action_dispatch/http/response.rb', line 92



alias :_cache_control= :cache_control=


  








  

    #abort  
  

  [ GitHub ]


  

  


# File 'actionpack/lib/action_dispatch/http/response.rb', line 382



def abort
  if stream.respond_to?(:abort)
    stream.abort
  elsif stream.respond_to?(:close)
    # `stream.close` should really be reserved for a close from the
    # other direction, but we must fall back to it for
    # compatibility.
    stream.close
  end
end


  








  

    #assign_default_content_type_and_charset!   (private)
  

  [ GitHub ]


  

  


# File 'actionpack/lib/action_dispatch/http/response.rb', line 477



def assign_default_content_type_and_charset!
  return if media_type

  ct = parsed_content_type_header
  set_content_type(ct.mime_type || Mime[:html].to_s,
                   ct.charset || self.class.default_charset)
end


  








  

    #await_commit  
  

  [ GitHub ]


  

  


# File 'actionpack/lib/action_dispatch/http/response.rb', line 195



def await_commit
  synchronize do
    @cv.wait_until { @committed }
  end
end


  








  

    #await_sent  
  

  [ GitHub ]


  

  


# File 'actionpack/lib/action_dispatch/http/response.rb', line 201



def await_sent
  synchronize { @cv.wait_until { @sent } }
end


  








  

    #before_committed   (private)
  

  [ GitHub ]


  

  


# File 'actionpack/lib/action_dispatch/http/response.rb', line 450



def before_committed
  return if committed?
  assign_default_content_type_and_charset!
  merge_and_normalize_cache_control!(@cache_control)
  handle_conditional_get!
  handle_no_content!
end


  








  

    #before_sending   (private)
  

  [ GitHub ]


  

  


# File 'actionpack/lib/action_dispatch/http/response.rb', line 458



def before_sending
  # Normally we've already committed by now, but it's possible
  # (e.g., if the controller action tries to read back its own
  # response) to get here before that. In that case, we must force
  # an "early" commit: we're about to freeze the headers, so this is
  # our last chance.
  commit! unless committed?

  @request.commit_cookie_jar! unless committed?
end


  








  

    #body_parts  
  

  [ GitHub ]


  

  


# File 'actionpack/lib/action_dispatch/http/response.rb', line 369



def body_parts
  parts = []
  @stream.each { |x| parts << x }
  parts
end


  








  

    #build_buffer(response, body)   (private)
  

  [ GitHub ]


  

  


# File 'actionpack/lib/action_dispatch/http/response.rb', line 469



def build_buffer(response, body)
  Buffer.new response, body
end


  








  

    #close  
  

  [ GitHub ]


  

  


# File 'actionpack/lib/action_dispatch/http/response.rb', line 378



def close
  stream.close if stream.respond_to?(:close)
end


  








  

    #code  
  



  

    

Returns a string to ensure compatibility with Net::HTTPResponse.


  



  [ GitHub ]


  

  


# File 'actionpack/lib/action_dispatch/http/response.rb', line 297



def code
  @status.to_s
end


  








  

    #commit!  
  

  [ GitHub ]


  

  


# File 'actionpack/lib/action_dispatch/http/response.rb', line 205



def commit!
  synchronize do
    before_committed
    @committed = true
    @cv.broadcast
  end
end


  








  

    #cookies  
  



  

    

Returns the response cookies, converted to a ::Hash of (name => value) pairs



assert_equal 'AuthorOfNewPage', r.cookies['author']


  



  [ GitHub ]


  

  


# File 'actionpack/lib/action_dispatch/http/response.rb', line 406



def cookies
  cookies = {}
  if header = get_header(SET_COOKIE)
    header = header.split("\n") if header.respond_to?(:to_str)
    header.each do |cookie|
      if pair = cookie.split(";").first
        key, value = pair.split("=").map { |v| Rack::Utils.unescape(v) }
        cookies[key] = value
      end
    end
  end
  cookies
end


  








  

    #delete_header(key)  
  

  [ GitHub ]


  

  


# File 'actionpack/lib/action_dispatch/http/response.rb', line 193



def delete_header(key); @headers.delete key; end


  








  

    #each(&block)  
  

  [ GitHub ]


  

  


# File 'actionpack/lib/action_dispatch/http/response.rb', line 75



def each(&block)
  sending!
  x = @stream.each(&block)
  sent!
  x
end


  








  

    #get_header(key)  
  

  [ GitHub ]


  

  


# File 'actionpack/lib/action_dispatch/http/response.rb', line 191



def get_header(key);    @headers[key];       end


  








  

    #handle_no_content!  
  

  [ GitHub ]


  

  


# File 'actionpack/lib/action_dispatch/http/response.rb', line 527



def handle_no_content!
  if NO_CONTENT_CODES.include?(@status)
    @headers.delete CONTENT_TYPE
    @headers.delete "Content-Length"
  end
end


  








  

    #has_header?(key)  ⇒ Boolean 
  



  

    
  





  


  [ GitHub ]


  

  


# File 'actionpack/lib/action_dispatch/http/response.rb', line 190



def has_header?(key);   @headers.key? key;   end


  








  

    #media_type  
  



  

    

Media type of response.


  



  [ GitHub ]


  

  


# File 'actionpack/lib/action_dispatch/http/response.rb', line 260



def media_type
  parsed_content_type_header.mime_type
end


  








  

    #message  
    Also known as: #status_message
  



  

    

Returns the corresponding message for the current HTTP status code:



response.status = 200
response.message # => "OK"

response.status = 404
response.message # => "Not Found"


  



  [ GitHub ]


  

  


# File 'actionpack/lib/action_dispatch/http/response.rb', line 309



def message
  Rack::Utils::HTTP_STATUS_CODES[@status]
end


  








  

    #munge_body_object(body)   (private)
  

  [ GitHub ]


  

  


# File 'actionpack/lib/action_dispatch/http/response.rb', line 473



def munge_body_object(body)
  body.respond_to?(:each) ? body : [body]
end


  








  

    #parse_content_type(content_type)   (private)
  

  

    This method is for internal use only.
  

  [ GitHub ]


  

  


# File 'actionpack/lib/action_dispatch/http/response.rb', line 430



def parse_content_type(content_type)
  if content_type && match = CONTENT_TYPE_PARSER.match(content_type)
    ContentTypeHeader.new(match[:mime_type], match[:charset])
  else
    NullContentTypeHeader
  end
end


  








  

    #parsed_content_type_header   (private)
  



  

    

Small internal convenience method to get the parsed version of the current content type header.


  



  [ GitHub ]


  

  


# File 'actionpack/lib/action_dispatch/http/response.rb', line 440



def parsed_content_type_header
  parse_content_type(get_header(CONTENT_TYPE))
end


  








  

    #prepare!  
  



  

    

Alias for #to_a.


  



  [ GitHub ]


  

  


# File 'actionpack/lib/action_dispatch/http/response.rb', line 401



alias prepare! to_a


  








  

    #rack_response(status, headers)  
  

  [ GitHub ]


  

  


# File 'actionpack/lib/action_dispatch/http/response.rb', line 534



def rack_response(status, headers)
  if NO_CONTENT_CODES.include?(status)
    [status, headers, []]
  else
    [status, headers, RackBody.new(self)]
  end
end


  








  

    #redirect_url  
  



  

    

The location header we’ll be responding with.


  



  [ GitHub ]


  

  


# File 'actionpack/lib/action_dispatch/http/response.rb', line 376



alias_method :redirect_url, :location


  








  

    #reset_body!  
  

  [ GitHub ]


  

  


# File 'actionpack/lib/action_dispatch/http/response.rb', line 365



def reset_body!
  @stream = build_buffer(self, [])
end


  








  

    #response_code  
  



  

    

The response code of the request.


  



  [ GitHub ]


  

  


# File 'actionpack/lib/action_dispatch/http/response.rb', line 292



def response_code
  @status
end


  








  

    #send_file(path)  
  



  

    

Send the file stored at path as the response body.


  



  [ GitHub ]


  

  


# File 'actionpack/lib/action_dispatch/http/response.rb', line 360



def send_file(path)
  commit!
  @stream = FileBody.new(path)
end


  








  

    #sending!  
  

  [ GitHub ]


  

  


# File 'actionpack/lib/action_dispatch/http/response.rb', line 213



def sending!
  synchronize do
    before_sending
    @sending = true
    @cv.broadcast
  end
end


  








  

    #sent!  
  

  [ GitHub ]


  

  


# File 'actionpack/lib/action_dispatch/http/response.rb', line 221



def sent!
  synchronize do
    @sent = true
    @cv.broadcast
  end
end


  








  

    #set_content_type(content_type, charset)   (private)
  

  [ GitHub ]


  

  


# File 'actionpack/lib/action_dispatch/http/response.rb', line 444



def set_content_type(content_type, charset)
  type = content_type || ""
  type = "#{type}; charset=#{charset.to_s.downcase}" if charset
  set_header CONTENT_TYPE, type
end


  








  

    #set_header(key, v)  
  

  [ GitHub ]


  

  


# File 'actionpack/lib/action_dispatch/http/response.rb', line 192



def set_header(key, v); @headers[key] = v;   end


  








  

    #status_message  
  



  

    

Alias for #message.


  



  [ GitHub ]


  

  


# File 'actionpack/lib/action_dispatch/http/response.rb', line 312



alias_method :status_message, :message


  








  

    #to_a  
    Also known as: #prepare!
  



  

    

Turns the Response into a Rack-compatible array of the status, headers, and body. Allows explicit splatting:



status, headers, body = *response


  



  [ GitHub ]


  

  


# File 'actionpack/lib/action_dispatch/http/response.rb', line 397



def to_a
  commit!
  rack_response @status, @headers.to_hash
end


  








  

    #write(string)  
  

  [ GitHub ]


  

  


# File 'actionpack/lib/action_dispatch/http/response.rb', line 320



def write(string)
  @stream.write string
end