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require 'abstract_unit'
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 thread_locals
tc.assert_equal 'aaron', Thread.current[:setting]
tc.assert_not_equal Thread.current.object_id, Thread.current[:originating_thread]
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.sent?, 'stream 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 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_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 = 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
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