Class: ActionDispatch::Response

Inherits:
Object
  • Object
show all
Includes:
Http::Cache::Response, Http::FilterRedirect, MonitorMixin, Rack::Response::Helpers
Defined in:
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).

Response is mostly a Ruby on Rails framework implementation detail, and should never be used directly in controllers. Controllers should use the methods defined in ActionController::Base instead. For example, if you want to set the HTTP response's content MIME type, then use ActionControllerBase#headers instead of Response#headers.

Nevertheless, integration tests may want to inspect controller responses in more detail, and that's when Response can be useful for application developers. Integration test methods such as Integration::RequestHelpers#get and Integration::RequestHelpers#post return objects of type TestResponse (which are of course also of type Response).

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

Defined Under Namespace

Classes: Buffer, ContentTypeHeader, FileBody, Header, RackBody

Constant Summary collapse

CONTENT_TYPE = 
"Content-Type"
"Set-Cookie"
LOCATION = 
"Location"
NO_CONTENT_CODES = 
[100, 101, 102, 103, 204, 205, 304]

Constants included from Http::FilterRedirect

Http::FilterRedirect::FILTERED

Instance Attribute Summary collapse

Attributes included from Http::Cache::Response

#cache_control

Class Method Summary collapse

Instance Method Summary collapse

Methods included from Http::Cache::Response

#date, #date=, #date?, #etag=, #etag?, #last_modified, #last_modified=, #last_modified?, #strong_etag=, #strong_etag?, #weak_etag=, #weak_etag?

Methods included from Http::FilterRedirect

#filtered_location

Constructor Details

#initialize(status = 200, header = {}, body = []) {|_self| ... } ⇒ Response

Returns a new instance of Response.

Yields:

  • (_self)

Yield Parameters:



161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
 
# File 'lib/action_dispatch/http/response.rb', line 161

def initialize(status = 200, header = {}, body = [])
  super()

  @header = Header.new(self, header)

  self.body, self.status = body, status

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

  prepare_cache_control!

  yield self if block_given?
end

Instance Attribute Details

#header ⇒ Object (readonly) Also known as: headers

Get headers for this response.



67
68
69
 
# File 'lib/action_dispatch/http/response.rb', line 67

def header
  @header
end

#request ⇒ Object

The request that the response is responding to.



61
62
63
 
# File 'lib/action_dispatch/http/response.rb', line 61

def request
  @request
end

#status ⇒ Object

The HTTP status code.



64
65
66
 
# File 'lib/action_dispatch/http/response.rb', line 64

def status
  @status
end

#stream ⇒ Object (readonly)

The underlying body, as a streamable object.



159
160
161
 
# File 'lib/action_dispatch/http/response.rb', line 159

def stream
  @stream
end

Class Method Details

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



149
150
151
152
 
# File 'lib/action_dispatch/http/response.rb', line 149

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

.merge_default_headers(original, default) ⇒ Object 



154
155
156
 
# File 'lib/action_dispatch/http/response.rb', line 154

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

Instance Method Details

#abort ⇒ Object 



370
371
372
373
374
375
376
377
378
379
 
# File 'lib/action_dispatch/http/response.rb', line 370

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

#await_commit ⇒ Object 



183
184
185
186
187
 
# File 'lib/action_dispatch/http/response.rb', line 183

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

#await_sent ⇒ Object 



189
190
191
 
# File 'lib/action_dispatch/http/response.rb', line 189

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

#body ⇒ Object

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



304
305
306
 
# File 'lib/action_dispatch/http/response.rb', line 304

def body
  @stream.body
end

#body=(body) ⇒ Object

Allows you to manually set or override the response body.



313
314
315
316
317
318
319
320
321
 
# File 'lib/action_dispatch/http/response.rb', line 313

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

#body_parts ⇒ Object 



357
358
359
360
361
 
# File 'lib/action_dispatch/http/response.rb', line 357

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

#charset ⇒ Object

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.



274
275
276
277
 
# File 'lib/action_dispatch/http/response.rb', line 274

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

#charset=(charset) ⇒ Object

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'



263
264
265
266
267
268
269
270
 
# File 'lib/action_dispatch/http/response.rb', line 263

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

#close ⇒ Object 



366
367
368
 
# File 'lib/action_dispatch/http/response.rb', line 366

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

#code ⇒ Object

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



285
286
287
 
# File 'lib/action_dispatch/http/response.rb', line 285

def code
  @status.to_s
end

#commit! ⇒ Object 



193
194
195
196
197
198
199
 
# File 'lib/action_dispatch/http/response.rb', line 193

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

#committed? ⇒ Boolean

Returns:

  • (Boolean) 


217
 
# File 'lib/action_dispatch/http/response.rb', line 217

def committed?; synchronize { @committed }; end

#content_type ⇒ Object

Content type of response.



243
244
245
 
# File 'lib/action_dispatch/http/response.rb', line 243

def content_type
  super.presence
end

#content_type=(content_type) ⇒ Object

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.



233
234
235
236
237
238
239
240
 
# File 'lib/action_dispatch/http/response.rb', line 233

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

#cookies ⇒ Object

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

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



394
395
396
397
398
399
400
401
402
403
404
405
406
 
# File 'lib/action_dispatch/http/response.rb', line 394

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) ⇒ Object 



181
 
# File 'lib/action_dispatch/http/response.rb', line 181

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

#each(&block) ⇒ Object 



73
74
75
76
77
78
 
# File 'lib/action_dispatch/http/response.rb', line 73

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

#get_header(key) ⇒ Object 



179
 
# File 'lib/action_dispatch/http/response.rb', line 179

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

#has_header?(key) ⇒ Boolean

Returns:

  • (Boolean) 


178
 
# File 'lib/action_dispatch/http/response.rb', line 178

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

#media_type ⇒ Object

Media type of response.



248
249
250
 
# File 'lib/action_dispatch/http/response.rb', line 248

def media_type
  parsed_content_type_header.mime_type
end

#message ⇒ Object 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"



297
298
299
 
# File 'lib/action_dispatch/http/response.rb', line 297

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

#reset_body! ⇒ Object 



353
354
355
 
# File 'lib/action_dispatch/http/response.rb', line 353

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

#response_code ⇒ Object

The response code of the request.



280
281
282
 
# File 'lib/action_dispatch/http/response.rb', line 280

def response_code
  @status
end

#send_file(path) ⇒ Object

Send the file stored at path as the response body.



348
349
350
351
 
# File 'lib/action_dispatch/http/response.rb', line 348

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

#sending! ⇒ Object 



201
202
203
204
205
206
207
 
# File 'lib/action_dispatch/http/response.rb', line 201

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

#sending? ⇒ Boolean

Returns:

  • (Boolean) 


216
 
# File 'lib/action_dispatch/http/response.rb', line 216

def sending?;   synchronize { @sending };   end

#sending_file=(v) ⇒ Object 



252
253
254
255
256
 
# File 'lib/action_dispatch/http/response.rb', line 252

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

#sent! ⇒ Object 



209
210
211
212
213
214
 
# File 'lib/action_dispatch/http/response.rb', line 209

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

#sent? ⇒ Boolean

Returns:

  • (Boolean) 


218
 
# File 'lib/action_dispatch/http/response.rb', line 218

def sent?;      synchronize { @sent };      end

#set_header(key, v) ⇒ Object 



180
 
# File 'lib/action_dispatch/http/response.rb', line 180

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

#to_a ⇒ Object 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



385
386
387
388
 
# File 'lib/action_dispatch/http/response.rb', line 385

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

#write(string) ⇒ Object 



308
309
310
 
# File 'lib/action_dispatch/http/response.rb', line 308

def write(string)
  @stream.write string
end