1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
337
338
339
340
341
342
343
344
345
346
347
348
349
350
351
352
353
354
355
356
357
358
359
360
361
362
363
364
365
366
367
368
369
370
371
372
373
374
375
376
377
378
379
380
381
382
383
384
385
386
387
388
389
390
391
392
393
394
395
396
397
398
399
400
401
402
403
404
405
406
407
408
409
410
411
412
413
414
415
416
417
418
419
420
421
422
423
424
425
426
427
428
429
430
431
432
433
434
435
436
437
438
439
440
441
442
443
444
445
446
447
448
449
450
451
452
453
454
455
456
457
458
459
460
461
462
463
464
465
466
467
468
469
470
471
472
473
474
475
476
477
478
479
480
481
482
483
484
485
486
487
488
489
490
491
492
493
494
495
496
497
498
499
500
501
502
503
504
505
506
507
508
509
510
511
512
513
514
515
516
517
518
|
# frozen_string_literal: true
require "abstract_unit"
require "timeout"
require "concurrent/atomic/count_down_latch"
Thread.abort_on_exception = true
module ActionController
class SSETest < ActionController::TestCase
class SSETestController < ActionController::Base
include ActionController::Live
def basic_sse
response.headers["Content-Type"] = "text/event-stream"
sse = SSE.new(response.stream)
sse.write("{\"name\":\"John\"}")
sse.write(name: "Ryan")
ensure
sse.close
end
def sse_with_event
sse = SSE.new(response.stream, event: "send-name")
sse.write("{\"name\":\"John\"}")
sse.write(name: "Ryan")
ensure
sse.close
end
def sse_with_retry
sse = SSE.new(response.stream, retry: 1000)
sse.write("{\"name\":\"John\"}")
sse.write({ name: "Ryan" }, { retry: 1500 })
ensure
sse.close
end
def sse_with_id
sse = SSE.new(response.stream)
sse.write("{\"name\":\"John\"}", id: 1)
sse.write({ name: "Ryan" }, { id: 2 })
ensure
sse.close
end
def sse_with_multiple_line_message
sse = SSE.new(response.stream)
sse.write("first line.\nsecond line.")
ensure
sse.close
end
end
tests SSETestController
def wait_for_response_stream_close
response.body
end
def test_basic_sse
get :basic_sse
wait_for_response_stream_close
assert_match(/data: {\"name\":\"John\"}/, response.body)
assert_match(/data: {\"name\":\"Ryan\"}/, response.body)
end
def test_sse_with_event_name
get :sse_with_event
wait_for_response_stream_close
assert_match(/data: {\"name\":\"John\"}/, response.body)
assert_match(/data: {\"name\":\"Ryan\"}/, response.body)
assert_match(/event: send-name/, response.body)
end
def test_sse_with_retry
get :sse_with_retry
wait_for_response_stream_close
first_response, second_response = response.body.split("\n\n")
assert_match(/data: {\"name\":\"John\"}/, first_response)
assert_match(/retry: 1000/, first_response)
assert_match(/data: {\"name\":\"Ryan\"}/, second_response)
assert_match(/retry: 1500/, second_response)
end
def test_sse_with_id
get :sse_with_id
wait_for_response_stream_close
first_response, second_response = response.body.split("\n\n")
assert_match(/data: {\"name\":\"John\"}/, first_response)
assert_match(/id: 1/, first_response)
assert_match(/data: {\"name\":\"Ryan\"}/, second_response)
assert_match(/id: 2/, second_response)
end
def test_sse_with_multiple_line_message
get :sse_with_multiple_line_message
wait_for_response_stream_close
first_response, second_response = response.body.split("\n")
assert_match(/data: first line/, first_response)
assert_match(/data: second line/, second_response)
end
end
class LiveStreamTest < ActionController::TestCase
class Exception < StandardError
end
class TestController < ActionController::Base
include ActionController::Live
attr_accessor :latch, :tc, :error_latch
def self.controller_path
"test"
end
def set_cookie
cookies[:hello] = "world"
response.stream.write "hello world"
response.close
end
def render_text
render plain: "zomg"
end
def default_header
response.stream.write "<html><body>hi</body></html>"
response.stream.close
end
def basic_stream
response.headers["Content-Type"] = "text/event-stream"
%w{ hello world }.each do |word|
response.stream.write word
end
response.stream.close
end
def blocking_stream
response.headers["Content-Type"] = "text/event-stream"
%w{ hello world }.each do |word|
response.stream.write word
latch.wait
end
response.stream.close
end
def write_sleep_autoload
path = File.expand_path("../fixtures", __dir__)
ActiveSupport::Dependencies.autoload_paths << path
response.headers["Content-Type"] = "text/event-stream"
response.stream.write "before load"
sleep 0.01
silence_warning do
::LoadMe
end
response.stream.close
latch.count_down
ActiveSupport::Dependencies.autoload_paths.reject! { |p| p == path }
end
def thread_locals
tc.assert_equal "aaron", Thread.current[:setting]
response.headers["Content-Type"] = "text/event-stream"
%w{ hello world }.each do |word|
response.stream.write word
end
response.stream.close
end
def with_stale
render plain: "stale" if stale?(etag: "123", template: false)
end
def exception_in_view
render "doesntexist"
end
def exception_in_view_after_commit
response.stream.write ""
render "doesntexist"
end
def exception_with_callback
response.headers["Content-Type"] = "text/event-stream"
response.stream.on_error do
response.stream.write %(data: "500 Internal Server Error"\n\n)
response.stream.close
end
response.stream.write "" # make sure the response is committed
raise "An exception occurred..."
end
def exception_in_controller
raise Exception, "Exception in controller"
end
def bad_request_error
raise ActionController::BadRequest
end
def exception_in_exception_callback
response.headers["Content-Type"] = "text/event-stream"
response.stream.on_error do
raise "We need to go deeper."
end
response.stream.write ""
response.stream.write params[:widget][:didnt_check_for_nil]
end
def overfill_buffer_and_die
logger = ActionController::Base.logger || Logger.new($stdout)
response.stream.on_error do
logger.warn "Error while streaming."
error_latch.count_down
end
# Write until the buffer is full. It doesn't expose that
# information directly, so we must hard-code its size:
10.times do
response.stream.write "."
end
# .. plus one more, because the #each frees up a slot:
response.stream.write "."
latch.count_down
# This write will block, and eventually raise
response.stream.write "x"
20.times do
response.stream.write "."
end
end
def ignore_client_disconnect
response.stream.ignore_disconnect = true
response.stream.write "" # commit
# These writes will be ignored
15.times do
response.stream.write "x"
end
logger.info "Work complete"
latch.count_down
end
end
tests TestController
def assert_stream_closed
assert response.stream.closed?, "stream should be closed"
assert response.committed?, "response should be committed"
assert response.sent?, "response should be sent"
end
def capture_log_output
output = StringIO.new
old_logger, ActionController::Base.logger = ActionController::Base.logger, ActiveSupport::Logger.new(output)
begin
yield output
ensure
ActionController::Base.logger = old_logger
end
end
def setup
super
def @controller.new_controller_thread
Thread.new { yield }
end
end
def test_set_cookie
get :set_cookie
assert_equal({ "hello" => "world" }, @response.cookies)
assert_equal "hello world", @response.body
end
def test_write_to_stream
get :basic_stream
assert_equal "helloworld", @response.body
assert_equal "text/event-stream", @response.headers["Content-Type"]
end
def test_delayed_autoload_after_write_within_interlock_hook
# Simulate InterlockHook
ActiveSupport::Dependencies.interlock.start_running
res = get :write_sleep_autoload
res.each {}
ActiveSupport::Dependencies.interlock.done_running
end
def test_async_stream
rubinius_skip "https://github.com/rubinius/rubinius/issues/2934"
@controller.latch = Concurrent::CountDownLatch.new
parts = ["hello", "world"]
get :blocking_stream
t = Thread.new(response) { |resp|
resp.await_commit
resp.stream.each do |part|
assert_equal parts.shift, part
ol = @controller.latch
@controller.latch = Concurrent::CountDownLatch.new
ol.count_down
end
}
assert t.join(3), "timeout expired before the thread terminated"
end
def test_abort_with_full_buffer
@controller.latch = Concurrent::CountDownLatch.new
@controller.error_latch = Concurrent::CountDownLatch.new
capture_log_output do |output|
get :overfill_buffer_and_die, format: "plain"
t = Thread.new(response) { |resp|
resp.await_commit
_, _, body = resp.to_a
body.each do
@controller.latch.wait
body.close
break
end
}
t.join
@controller.error_latch.wait
assert_match "Error while streaming", output.rewind && output.read
end
end
def test_ignore_client_disconnect
@controller.latch = Concurrent::CountDownLatch.new
capture_log_output do |output|
get :ignore_client_disconnect
t = Thread.new(response) { |resp|
resp.await_commit
_, _, body = resp.to_a
body.each do
body.close
break
end
}
t.join
Timeout.timeout(3) do
@controller.latch.wait
end
assert_match "Work complete", output.rewind && output.read
end
end
def test_thread_locals_get_copied
@controller.tc = self
Thread.current[:originating_thread] = Thread.current.object_id
Thread.current[:setting] = "aaron"
get :thread_locals
end
def test_live_stream_default_header
get :default_header
assert response.headers["Content-Type"]
end
def test_render_text
get :render_text
assert_equal "zomg", response.body
assert_stream_closed
end
def test_exception_handling_html
assert_raises(ActionView::MissingTemplate) do
get :exception_in_view
end
capture_log_output do |output|
get :exception_in_view_after_commit
assert_match %r((window\.location = "/500\.html"</script></html>)$), response.body
assert_match "Missing template test/doesntexist", output.rewind && output.read
assert_stream_closed
end
assert response.body
assert_stream_closed
end
def test_exception_handling_plain_text
assert_raises(ActionView::MissingTemplate) do
get :exception_in_view, format: :json
end
capture_log_output do |output|
get :exception_in_view_after_commit, format: :json
assert_equal "", response.body
assert_match "Missing template test/doesntexist", output.rewind && output.read
assert_stream_closed
end
end
def test_exception_callback_when_committed
current_threads = Thread.list
capture_log_output do |output|
get :exception_with_callback, format: "text/event-stream"
# Wait on the execution of all threads
(Thread.list - current_threads).each(&:join)
assert_equal %(data: "500 Internal Server Error"\n\n), response.body
assert_match "An exception occurred...", output.rewind && output.read
assert_stream_closed
end
end
def test_exception_in_controller_before_streaming
assert_raises(ActionController::LiveStreamTest::Exception) do
get :exception_in_controller, format: "text/event-stream"
end
end
def test_bad_request_in_controller_before_streaming
assert_raises(ActionController::BadRequest) do
get :bad_request_error, format: "text/event-stream"
end
end
def test_exceptions_raised_handling_exceptions_and_committed
capture_log_output do |output|
get :exception_in_exception_callback, format: "text/event-stream"
assert_equal "", response.body
assert_match "We need to go deeper", output.rewind && output.read
assert_stream_closed
end
end
def test_stale_without_etag
get :with_stale
assert_equal 200, response.status.to_i
end
def test_stale_with_etag
@request.if_none_match = %(W/"#{Digest::MD5.hexdigest('123')}")
get :with_stale
assert_equal 304, response.status.to_i
end
end
class BufferTest < ActionController::TestCase
def test_nil_callback
buf = ActionController::Live::Buffer.new nil
assert buf.call_on_error
end
end
end
class LiveStreamRouterTest < ActionDispatch::IntegrationTest
class TestController < ActionController::Base
include ActionController::Live
def index
response.headers["Content-Type"] = "text/event-stream"
sse = SSE.new(response.stream)
sse.write("{\"name\":\"John\"}")
sse.write(name: "Ryan")
ensure
sse.close
end
end
def self.call(env)
routes.call(env)
end
def self.routes
@routes ||= ActionDispatch::Routing::RouteSet.new
end
routes.draw do
get "/test" => "live_stream_router_test/test#index"
end
def app
self.class
end
test "streaming served through the router" do
get "/test"
assert_response :ok
assert_match(/data: {\"name\":\"John\"}/, response.body)
assert_match(/data: {\"name\":\"Ryan\"}/, response.body)
end
end
|
