yahns Ruby server user/dev discussion
 help / color / Atom feed
75e1857d699cdce0026ef848acfd17b93c2f3eba blob 26691 bytes (raw)

  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
519
520
521
522
523
524
525
526
527
528
529
530
531
532
533
534
535
536
537
538
539
540
541
542
543
544
545
546
547
548
549
550
551
552
553
554
555
556
557
558
559
560
561
562
563
564
565
566
567
568
569
570
571
572
573
574
575
576
577
578
579
580
581
582
583
584
585
586
587
588
589
590
591
592
593
594
595
596
597
598
599
600
601
602
603
604
605
606
607
608
609
610
611
612
613
614
615
616
617
618
619
620
621
622
623
624
625
626
627
628
629
630
631
632
633
634
635
636
637
638
639
640
641
642
643
644
645
646
647
648
649
650
651
652
653
654
655
656
657
658
659
660
661
662
663
664
665
666
667
668
669
670
671
672
673
674
675
676
677
678
679
680
681
682
683
684
685
686
687
688
689
690
691
692
693
694
695
696
697
698
699
700
701
702
703
704
705
706
707
708
709
710
711
712
713
714
715
716
717
718
719
720
721
722
723
724
725
726
727
728
729
730
731
732
733
734
735
736
737
738
739
740
741
742
743
744
745
746
747
748
749
750
751
752
753
754
755
756
757
758
759
760
761
762
763
764
765
766
767
768
769
770
771
772
773
774
775
776
777
778
779
780
781
782
783
784
785
786
787
788
789
790
791
792
793
794
795
796
797
798
799
800
801
802
803
804
805
806
807
808
809
810
811
812
813
814
815
816
817
818
819
820
821
822
823
824
825
826
827
828
829
830
831
832
833
834
835
836
837
838
839
840
841
842
843
844
845
846
847
848
849
850
851
852
853
854
855
856
857
858
859
860
861
862
863
864
865
866
867
868
869
870
871
872
873
874
875
876
877
878
879
880
881
882
883
884
885
886
887
888
889
890
891
892
893
894
895
896
897
898
899
900
901
902
903
904
905
906
 
# Copyright (C) 2013-2016 all contributors <yahns-public@yhbt.net>
# License: GPL-3.0+ (https://www.gnu.org/licenses/gpl-3.0.txt)
# frozen_string_literal: true
require_relative 'server_helper'

class TestServer < Testcase
  ENV["N"].to_i > 1 and parallelize_me!
  include ServerHelper

  alias setup server_helper_setup
  alias teardown server_helper_teardown

  def test_single_process
    err = @err
    cfg = Yahns::Config.new
    host, port = @srv.addr[3], @srv.addr[1]
    cfg.instance_eval do
      ru = lambda { |_| [ 200, {'Content-Length'=>'2'}, ['HI'] ] }
      GTL.synchronize { app(:rack, ru) { listen "#{host}:#{port}" } }
      logger(Logger.new(err.path))
    end
    pid = mkserver(cfg)
    run_client(host, port) { |res| assert_equal "HI", res.body }
    c = get_tcp_client(host, port)

    # test pipelining
    r = "GET / HTTP/1.1\r\nHost: example.com\r\n\r\n"
    c.write(r + r)
    buf = ''.dup
    Timeout.timeout(10) do
      until buf =~ /HI.+HI/m
        buf << c.readpartial(4096)
      end
    end

    # trickle pipelining
    c.write(r + "GET ")
    buf = ''.dup
    Timeout.timeout(10) do
      until buf =~ /HI\z/
        buf << c.readpartial(4096)
      end
    end
    c.write("/ HTTP/1.1\r\nHost: example.com\r\n\r\n")
    Timeout.timeout(10) do
      until buf =~ /HI.+HI/m
        buf << c.readpartial(4096)
      end
    end
    Process.kill(:QUIT, pid)
    "GET / HTTP/1.1\r\nHost: example.com\r\n\r\n".each_byte do |x|
      sleep(0.01)
      c.write(x.chr)
    end
    buf = Timeout.timeout(30) { c.read }
    assert_match(/Connection: close/, buf)
    _, status = Timeout.timeout(10) { Process.waitpid2(pid) }
    assert status.success?, status.inspect
    c.close
  end

  def test_input_body_true; input_body(true); end
  def test_input_body_false; input_body(false); end
  def test_input_body_lazy; input_body(:lazy); end

  def input_body(btype)
    err = @err
    cfg = Yahns::Config.new
    host, port = @srv.addr[3], @srv.addr[1]
    cfg.instance_eval do
      ru = lambda {|e|[ 200, {'Content-Length'=>'2'},[e["rack.input"].read]]}
      GTL.synchronize do
        app(:rack, ru) do
          listen "#{host}:#{port}"
          input_buffering btype
        end
      end
      logger(Logger.new(err.path))
    end
    pid = mkserver(cfg)
    c = get_tcp_client(host, port)
    buf = "PUT / HTTP/1.0\r\nContent-Length: 2\r\n\r\nHI"
    c.write(buf)
    IO.select([c], nil, nil, 5)
    rv = c.read(666)
    head, body = rv.split(/\r\n\r\n/)
    assert_match(%r{^Content-Length: 2\r\n}, head)
    assert_equal "HI", body, "#{rv.inspect} - #{btype.inspect}"
    c.close

    # pipelined oneshot
    buf = "PUT / HTTP/1.1\r\nContent-Length: 2\r\n\r\nHI"
    c = get_tcp_client(host, port)
    c.write(buf + buf)
    buf = ''.dup
    Timeout.timeout(10) do
      until buf =~ /HI.+HI/m
        buf << c.readpartial(4096)
      end
    end
    assert buf.gsub!(/Date:[^\r\n]+\r\n/, ""), "kill differing Date"
    rv = buf.sub!(/\A(HTTP.+?\r\n\r\nHI)/m, "")
    first = $1
    assert rv
    assert_equal first, buf

    # pipelined trickle
    buf = "PUT / HTTP/1.1\r\nContent-Length: 5\r\n\r\nHIBYE"
    (buf + buf).each_byte do |b|
      c.write(b.chr)
      sleep(0.01) if b.chr == ":"
      Thread.pass
    end
    buf = ''.dup
    Timeout.timeout(10) do
      until buf =~ /HIBYE.+HIBYE/m
        buf << c.readpartial(4096)
      end
    end
    assert buf.gsub!(/Date:[^\r\n]+\r\n/, ""), "kill differing Date"
    rv = buf.sub!(/\A(HTTP.+?\r\n\r\nHIBYE)/m, "")
    first = $1
    assert rv
    assert_equal first, buf
  ensure
    c.close if c
    quit_wait(pid)
  end

  def test_trailer_true; trailer(true); end
  def test_trailer_false; trailer(false); end
  def test_trailer_lazy; trailer(:lazy); end
  def test_slow_trailer_true; trailer(true, 0.02); end
  def test_slow_trailer_false; trailer(false, 0.02); end
  def test_slow_trailer_lazy; trailer(:lazy, 0.02); end

  def trailer(btype, delay = false)
    err = @err
    cfg = Yahns::Config.new
    host, port = @srv.addr[3], @srv.addr[1]
    cfg.instance_eval do
      ru = lambda do |e|
        body = e["rack.input"].read
        s = e["HTTP_XBT"] + "\n" + body
        [ 200, {'Content-Length'=>s.size.to_s}, [ s ] ]
      end
      GTL.synchronize do
        app(:rack, ru) do
          listen "#{host}:#{port}"
          input_buffering btype
        end
      end
      logger(Logger.new(err.path))
    end
    pid = mkserver(cfg)
    c = get_tcp_client(host, port)
    buf = "PUT / HTTP/1.0\r\nTrailer:xbt\r\nTransfer-Encoding: chunked\r\n\r\n"
    c.write(buf)
    xbt = btype.to_s
    sleep(delay) if delay
    c.write(sprintf("%x\r\n", xbt.size))
    sleep(delay) if delay
    c.write(xbt)
    sleep(delay) if delay
    c.write("\r\n")
    sleep(delay) if delay
    c.write("0\r\nXBT: ")
    sleep(delay) if delay
    c.write("#{xbt}\r\n\r\n")
    IO.select([c], nil, nil, 5000) or raise "timed out"
    rv = c.read(666)
    _, body = rv.split(/\r\n\r\n/)
    a, b = body.split(/\n/)
    assert_equal xbt, a
    assert_equal xbt, b
  ensure
    c.close if c
    quit_wait(pid)
  end

  def test_check_client_connection
    tmpdir = yahns_mktmpdir
    sock = "#{tmpdir}/sock"
    unix_srv = UNIXServer.new(sock)
    msgs = %w(ZZ zz)
    err = @err
    cfg = Yahns::Config.new
    bpipe = cloexec_pipe
    cfg.instance_eval do
      ru = lambda { |e|
        case e['PATH_INFO']
        when '/sleep'
          a = Object.new
          a.instance_variable_set(:@bpipe, bpipe)
          a.instance_variable_set(:@msgs, msgs)
          def a.each
            @msgs.each do |msg|
              yield @bpipe[0].read(msg.size)
            end
          end
        when '/cccfail'
          # we should not get here if check_client_connection worked
          abort "CCCFAIL"
        else
          a = %w(HI)
        end
        [ 200, {'Content-Length'=>'2'}, a ]
      }
      GTL.synchronize {
        app(:rack, ru) {
          listen sock
          check_client_connection true
          # needed to avoid concurrency with check_client_connection
          queue { worker_threads 1 }
          output_buffering false
        }
      }
      logger(Logger.new(err.path))
    end
    srv = Yahns::Server.new(cfg)

    # ensure we set worker_threads correctly
    eggs = srv.instance_variable_get(:@config).qeggs
    assert_equal 1, eggs.size
    assert_equal 1, eggs.first[1].instance_variable_get(:@worker_threads)

    pid = xfork do
      bpipe[1].close
      ENV["YAHNS_FD"] = unix_srv.fileno.to_s
      unix_srv.autoclose = false
      srv.start.join
    end
    bpipe[0].close
    a = UNIXSocket.new(sock)
    b = UNIXSocket.new(sock)
    a.write("GET /sleep HTTP/1.0\r\n\r\n")
    r = IO.select([a], nil, nil, 4)
    assert r, "nothing ready"
    assert_equal a, r[0][0]
    buf = a.read(8)
    assert_equal "HTTP/1.1", buf

    # hope the kernel sees this before it sees the bpipe ping-ponging below
    b.write("GET /cccfail HTTP/1.0\r\n\r\n")
    b.shutdown
    b.close

    # ping-pong a bit to stall the server
    msgs.each do |msg|
      bpipe[1].write(msg)
      Timeout.timeout(10) { buf << a.readpartial(10) until buf =~ /#{msg}/ }
    end
    bpipe[1].close
    assert_equal msgs.join, buf.split(/\r\n\r\n/)[1]

    # do things still work?
    c = UNIXSocket.new(sock)
    c.write "GET /\r\n\r\n"
    assert_equal "HI", c.read
    c.close
    a.close
  rescue => e
    warn e.class
    warn e.message
    warn e.backtrace.join("\n")
  ensure
    unix_srv.close
    quit_wait(pid)
    FileUtils.rm_rf(tmpdir)
  end

  def test_mp
    pid, host, port = new_mp_server
    wpid = nil
    run_client(host, port) do |res|
      wpid ||= res.body.to_i
    end
  ensure
    quit_wait(pid)
    if wpid
      assert_raises(Errno::ESRCH) { Process.kill(:KILL, wpid) }
      assert_raises(Errno::ECHILD) { Process.waitpid2(wpid) }
    end
  end

  def test_mp_worker_die
    pid, host, port = new_mp_server
    wpid1 = wpid2 = nil
    run_client(host, port) do |res|
      wpid1 ||= res.body.to_i
    end
    Process.kill(:QUIT, wpid1)
    poke_until_dead(wpid1)
    run_client(host, port) do |res|
      wpid2 ||= res.body.to_i
    end
    refute_equal wpid2, wpid1
  ensure
    quit_wait(pid)
    assert_raises(Errno::ESRCH) { Process.kill(:KILL, wpid2) } if wpid2
  end

  def test_mp_dead_parent
    pid, host, port = new_mp_server(1)
    wpid = nil
    run_client(host, port) do |res|
      wpid ||= res.body.to_i
    end
    Process.kill(:KILL, pid)
    _, status = Process.waitpid2(pid)
    assert status.signaled?, status.inspect
    poke_until_dead(wpid)
  end

  def run_client(host, port)
    c = get_tcp_client(host, port)
    Net::HTTP.start(host, port) do |http|
      res = http.request(Net::HTTP::Get.new("/"))
      assert_equal 200, res.code.to_i
      assert_equal "keep-alive", res["Connection"]
      yield res
      res = http.request(Net::HTTP::Get.new("/"))
      assert_equal 200, res.code.to_i
      assert_equal "keep-alive", res["Connection"]
      yield res
    end
    c.write "GET / HTTP/1.0\r\n\r\n"
    res = Timeout.timeout(10) { c.read }
    head, _ = res.split(/\r\n\r\n/)
    head = head.split(/\r\n/)
    assert_equal "HTTP/1.1 200 OK", head[0]
    assert_equal "Connection: close", head[-1]
    c.close
  end

  def new_mp_server(nr = 2)
    ru = @ru = tmpfile(%w(config .ru))
    @ru.puts('a = $$.to_s')
    @ru.puts('run lambda { |_| [ 200, {"Content-Length"=>a.size.to_s},[a]]}')
    err = @err
    cfg = Yahns::Config.new
    host, port = @srv.addr[3], @srv.addr[1]
    cfg.instance_eval do
      worker_processes nr
      GTL.synchronize { app(:rack, ru.path) { listen "#{host}:#{port}" } }
      logger(Logger.new(File.open(err.path, "a")))
    end
    pid = mkserver(cfg)
    [ pid, host, port ]
  end

  def test_nonpersistent
    err = @err
    cfg = Yahns::Config.new
    host, port = @srv.addr[3], @srv.addr[1]
    cfg.instance_eval do
      ru = lambda { |_| [ 200, {'Content-Length'=>'2'}, ['HI'] ] }
      GTL.synchronize {
        app(:rack, ru) {
          listen "#{host}:#{port}"
          persistent_connections false
        }
      }
      logger(Logger.new(err.path))
    end
    pid = mkserver(cfg)
    c = get_tcp_client(host, port)
    c.write("GET / HTTP/1.1\r\nHost: example.com\r\n\r\n")
    buf = Timeout.timeout(10) { c.read }
    assert_match(/Connection: close/, buf)
    c.close
  ensure
    quit_wait(pid)
  end

  def test_ttin_ttou
    err, cfg, host, port = @err, Yahns::Config.new, @srv.addr[3], @srv.addr[1]
    ru = lambda { |_|
      b = "#$$"
      [ 200, {'Content-Length'=>b.size.to_s}, [b] ]
    }
    cfg.instance_eval do
      GTL.synchronize { app(:rack, ru) { listen "#{host}:#{port}" } }
      worker_processes 1
      stderr_path err.path
    end
    pid = mkserver(cfg)

    read_pid = lambda do
      c = get_tcp_client(host, port)
      c.write("GET /\r\n\r\n")
      body = Timeout.timeout(10) { c.read }
      c.close
      assert_match(/\A\d+\z/, body)
      body
    end

    orig_worker_pid = read_pid.call.to_i
    assert_equal 1, Process.kill(0, orig_worker_pid)

    Process.kill(:TTOU, pid)
    poke_until_dead(orig_worker_pid)

    Process.kill(:TTIN, pid)
    second_worker_pid = read_pid.call.to_i

    # PID recycling is rare, hope it doesn't fail here
    refute_equal orig_worker_pid, second_worker_pid
  ensure
    quit_wait(pid)
  end

  def test_mp_hooks
    err = @err
    out = tmpfile(%w(mp_hooks .out))
    cfg = Yahns::Config.new
    host, port = @srv.addr[3], @srv.addr[1]
    cfg.instance_eval do
      ru = lambda {|_|x="#$$";[200,{'Content-Length'=>x.size.to_s },[x]]}
      GTL.synchronize {
        app(:rack, ru) {
          listen "#{host}:#{port}"
          persistent_connections false
          atfork_child { warn "INFO hihi from app.atfork_child" }
        }
        worker_processes(1) do
          atfork_child { puts "af #$$ worker is running" }
          atfork_prepare { puts "af #$$ parent about to spawn" }
          atfork_parent { puts "af #$$ parent done spawning" }
        end
      }
      stderr_path err.path
      stdout_path out.path
    end
    master_pid = pid = mkserver(cfg)
    c = get_tcp_client(host, port)
    c.write("GET / HTTP/1.0\r\nHost: example.com\r\n\r\n")
    buf = Timeout.timeout(10) { c.read }
    c.close
    head, body = buf.split(/\r\n\r\n/)
    assert_match(/200 OK/, head)
    assert_match(/\A\d+\z/, body)
    worker_pid = body.to_i

    # ensure atfork_parent has run
    quit_wait(master_pid)
    master_pid = nil

    lines = out.readlines.map!(&:chomp!)
    out.close!

    assert_match %r{INFO hihi from app\.atfork_child}, File.read(err.path)

    assert_equal 3, lines.size, lines.join("\n")
    assert_equal("af #{pid} parent about to spawn", lines.shift)

    # child/parent ordering is not guaranteed
    assert_equal 1, lines.grep(/\Aaf #{pid} parent done spawning\z/).size
    assert_equal 1, lines.grep(/\Aaf #{worker_pid} worker is running\z/).size
  ensure
    quit_wait(master_pid)
  end

  def test_mp_hooks_worker_nr
    err = @err
    out = tmpfile(%w(mp_hooks .out))
    cfg = Yahns::Config.new
    host, port = @srv.addr[3], @srv.addr[1]
    cfg.instance_eval do
      ru = lambda {|_|x="#$$";[200,{'Content-Length'=>x.size.to_s },[x]]}
      GTL.synchronize {
        app(:rack, ru) {
          listen "#{host}:#{port}"
          persistent_connections false
          atfork_child { |nr| warn "INFO hihi.#{nr} from app.atfork_child" }
        }
        worker_processes(1) do
          atfork_child { |nr| puts "af.#{nr} #$$ worker is running" }
          atfork_prepare { |nr| puts "af.#{nr} #$$ parent about to spawn" }
          atfork_parent { |nr| puts "af.#{nr} #$$ parent done spawning" }
        end
      }
      stderr_path err.path
      stdout_path out.path
    end
    pid = mkserver(cfg)
    c = get_tcp_client(host, port)
    c.write("GET / HTTP/1.0\r\nHost: example.com\r\n\r\n")
    buf = Timeout.timeout(10) { c.read }
    c.close
    head, body = buf.split(/\r\n\r\n/)
    assert_match(/200 OK/, head)
    assert_match(/\A\d+\z/, body)
    worker_pid = body.to_i
    lines = out.readlines.map!(&:chomp!)
    out.close!

    assert_match %r{INFO hihi\.0 from app\.atfork_child}, File.read(err.path)
    assert_equal 3, lines.size
    assert_equal("af.0 #{pid} parent about to spawn", lines.shift)

    # child/parent ordering is not guaranteed
    assert_equal 1,
        lines.grep(/\Aaf\.0 #{pid} parent done spawning\z/).size
    assert_equal 1,
        lines.grep(/\Aaf\.0 #{worker_pid} worker is running\z/).size
  ensure
    quit_wait(pid)
  end

  def test_pidfile_usr2
    tmpdir = yahns_mktmpdir
    pidf = "#{tmpdir}/pid"
    old = "#{pidf}.oldbin"
    err = @err
    cfg = Yahns::Config.new
    host, port = @srv.addr[3], @srv.addr[1]
    cfg.instance_eval do
      GTL.synchronize {
        app(:rack, lambda { |_| [ 200, {}, [] ] }) { listen "#{host}:#{port}" }
        pid pidf
      }
      stderr_path err.path
    end
    pid = mkserver(cfg) do
      Yahns::START[0] = "sh"
      Yahns::START[:argv] = [ '-c', "echo $$ > #{pidf}; sleep 10" ]
    end

    # ensure server is running
    c = get_tcp_client(host, port)
    c.write("GET / HTTP/1.0\r\n\r\n")
    buf = Timeout.timeout(10) { c.read }
    assert_match(/Connection: close/, buf)
    c.close

    assert_equal pid, File.read(pidf).to_i
    before = File.stat(pidf)

    # start the upgrade
    Process.kill(:USR2, pid)
    Timeout.timeout(10) { sleep(0.01) until File.exist?(old) }
    after = File.stat(old)
    assert_equal after.ino, before.ino
    Timeout.timeout(10) { sleep(0.01) until File.exist?(pidf) }
    new = File.read(pidf).to_i
    refute_equal pid, new

    # abort the upgrade (just wait for it to finish)
    Process.kill(:TERM, new)
    poke_until_dead(new)

    # ensure reversion is OK
    Timeout.timeout(10) { sleep(0.01) while File.exist?(old) }
    after = File.stat(pidf)
    assert_equal before.ino, after.ino
    assert_equal before.mtime, after.mtime
    assert_equal pid, File.read(pidf).to_i

    lines = File.readlines(err.path).grep(/ERROR/)
    assert_equal 1, lines.size
    assert_match(/reaped/, lines[0], lines)
    File.truncate(err.path, 0)
  ensure
    quit_wait(pid)
    FileUtils.rm_rf(tmpdir)
  end

  module MockSwitchUser
    def self.included(cls)
      cls.__send__(:remove_method, :switch_user)
      cls.__send__(:alias_method, :switch_user, :mock_switch_user)
    end

    def mock_switch_user(user, group = nil)
      $yahns_user = [ $$, user, group ]
    end
  end

  def test_user_no_workers
    refute defined?($yahns_user), "$yahns_user global should be undefined"
    err = @err
    cfg = Yahns::Config.new
    host, port = @srv.addr[3], @srv.addr[1]
    cfg.instance_eval do
      ru = lambda do |_|
        b = $yahns_user.inspect
        [ 200, {'Content-Length'=>b.size.to_s }, [b] ]
      end
      GTL.synchronize { app(:rack, ru) { listen "#{host}:#{port}" } }
      user "nobody"
      stderr_path err.path
    end
    pid = mkserver(cfg) { Yahns::Server.__send__(:include, MockSwitchUser) }
    expect = [ pid, "nobody", nil ].inspect
    run_client(host, port) { |res| assert_equal expect, res.body }
    refute defined?($yahns_user), "$yahns_user global should be undefined"
  ensure
    quit_wait(pid)
  end

  def test_user_workers
    refute defined?($yahns_user), "$yahns_user global should be undefined"
    err = @err
    cfg = Yahns::Config.new
    host, port = @srv.addr[3], @srv.addr[1]
    cfg.instance_eval do
      ru = lambda do |_|
        b = $yahns_user.inspect
        [ 200, {'Content-Length'=>b.size.to_s, 'X-Pid' => "#$$" }, [b] ]
      end
      GTL.synchronize { app(:rack, ru) { listen "#{host}:#{port}" } }
      user "nobody"
      stderr_path err.path
      worker_processes 1
    end
    pid = mkserver(cfg) { Yahns::Server.__send__(:include, MockSwitchUser) }
    run_client(host, port) do |res|
      worker_pid = res["X-Pid"].to_i
      assert_operator worker_pid, :>, 0
      refute_equal pid, worker_pid
      refute_equal $$, worker_pid
      expect = [ worker_pid, "nobody", nil ].inspect
      assert_equal expect, res.body
    end
    refute defined?($yahns_user), "$yahns_user global should be undefined"
  ensure
    quit_wait(pid)
  end

  def test_working_directory
    err, cfg, host, port = @err, Yahns::Config.new, @srv.addr[3], @srv.addr[1]
    ru = lambda { |_|
      [ 200, {'Content-Length'=>Dir.pwd.size.to_s }, [Dir.pwd] ]
    }
    yahns_mktmpdir do |tmpdir|
      begin
        pid = mkserver(cfg) do
          $LOAD_PATH << File.expand_path("lib")
          cfg.instance_eval do
            working_directory tmpdir
            app(:rack, ru) { listen "#{host}:#{port}" }
            stderr_path err.path
          end
        end
        refute_equal Dir.pwd, tmpdir
        Net::HTTP.start(host, port) do |http|
          assert_equal tmpdir, http.request(Net::HTTP::Get.new("/")).body
        end
      ensure
        quit_wait(pid)
      end
    end
  end

  def test_errors
    tmpdir = yahns_mktmpdir
    sock = "#{tmpdir}/sock"
    err, cfg, host, port = @err, Yahns::Config.new, @srv.addr[3], @srv.addr[1]
    re = tmpfile(%w(rack .errors))
    ru = lambda { |e|
      e["rack.errors"].write "INFO HIHI\n"
      [ 200, {'Content-Length'=>'2' }, %w(OK) ]
    }
    cfg.instance_eval do
      GTL.synchronize {
        app(:rack, ru) {
          listen "#{host}:#{port}"
          errors re.path
        }
        app(:rack, ru) { listen sock }
      }
      stderr_path err.path
    end
    pid = mkserver(cfg)
    Net::HTTP.start(host, port) do |http|
      assert_equal "OK", http.request(Net::HTTP::Get.new("/")).body
    end
    assert_equal "INFO HIHI\n", re.read

    c = UNIXSocket.new(sock)
    c.write "GET /\r\n\r\n"
    assert_equal c, c.wait(30)
    assert_equal "OK", c.read
    c.close
    assert_match %r{INFO HIHI}, File.read(err.path)
  ensure
    re.close!
    quit_wait(pid)
    FileUtils.rm_rf(tmpdir)
  end

  def test_persistent_shutdown_timeout; _persistent_shutdown(nil); end
  def test_persistent_shutdown_timeout_mp; _persistent_shutdown(1); end

  def _persistent_shutdown(nr_workers)
    err, cfg, host, port = @err, Yahns::Config.new, @srv.addr[3], @srv.addr[1]
    pid = mkserver(cfg) do
      ru = lambda { |e| [ 200, {'Content-Length'=>'2'}, %w(OK) ] }
      cfg.instance_eval do
        app(:rack, ru) { listen "#{host}:#{port}" }
        stderr_path err.path
        shutdown_timeout 1
        worker_processes(nr_workers) if nr_workers
      end
    end
    c = get_tcp_client(host, port)
    c.write "GET / HTTP/1.1\r\nHost: example.com\r\n\r\n"
    assert_equal c, c.wait(30)
    buf = ''.dup
    re = /\r\n\r\nOK\z/
    Timeout.timeout(30) do
      begin
        buf << c.readpartial(666)
      end until re =~ buf
    end
    refute_match %r{Connection: close}, buf
    assert_nil c.wait(0.001), "connection should still be alive"
    Process.kill(:QUIT, pid)
    _, status = Timeout.timeout(5) { Process.waitpid2(pid) }
    assert status.success?, status.inspect
    assert_nil c.read(666)
  end

  def test_slow_shutdown_timeout; _slow_shutdown(nil); end
  def test_slow_shutdown_timeout_mp; _slow_shutdown(1); end

  def _slow_shutdown(nr_workers)
    err, cfg, host, port = @err, Yahns::Config.new, @srv.addr[3], @srv.addr[1]
    pid = mkserver(cfg) do
      ru = lambda { |e| [ 200, {'Content-Length'=>'2'}, %w(OK) ] }
      cfg.instance_eval do
        app(:rack, ru) { listen "#{host}:#{port}" }
        stderr_path err.path
        worker_processes(nr_workers) if nr_workers
      end
    end
    c = get_tcp_client(host, port)
    c.write 'G'
    100000.times { Thread.pass }
    Process.kill(:QUIT, pid)
    "ET / HTTP/1.1\r\nHost: example.com\r\n\r\n".each_byte do |x|
      Thread.pass
      c.write(x.chr)
      Thread.pass
    end
    assert_equal c, c.wait(30)
    buf = ''.dup
    re = /\r\n\r\nOK\z/
    Timeout.timeout(30) do
      begin
        buf << c.readpartial(666)
      end until re =~ buf
    end
    c.close
    _, status = Timeout.timeout(5) { Process.waitpid2(pid) }
    assert status.success?, status.inspect
  end

  def test_before_exec
    err, cfg, host, port = @err, Yahns::Config.new, @srv.addr[3], @srv.addr[1]
    ru = lambda { |e| [ 200, {'Content-Length'=>'2' }, %w(OK) ] }
    tmp = tmpfile(%w(exec .pid))
    x = "echo $$ >> #{tmp.path}"
    pid = mkserver(cfg) do
      cfg.instance_eval do
        app(:rack, ru) { listen "#{host}:#{port}" }
        before_exec do |exec_cmd|
          exec_cmd.replace(%W(/bin/sh -c #{x}))
        end
        stderr_path err.path
      end
    end

    # did we start properly?
    Net::HTTP.start(host, port) do |http|
      assert_equal "OK", http.request(Net::HTTP::Get.new("/")).body
    end

    Process.kill(:USR2, pid)
    Timeout.timeout(30) { sleep(0.01) until tmp.size > 0 }
    buf = tmp.read
    assert_match %r{\A\d+}, buf
    exec_pid = buf.to_i
    poke_until_dead exec_pid

    # ensure it recovered
    Net::HTTP.start(host, port) do |http|
      assert_equal "OK", http.request(Net::HTTP::Get.new("/")).body
    end
    assert_match %r{reaped}, err.read
    err.truncate(0)
  ensure
    tmp.close!
    quit_wait(pid)
  end

  def test_app_controls_close
    err, cfg, host, port = @err, Yahns::Config.new, @srv.addr[3], @srv.addr[1]
    pid = mkserver(cfg) do
      cfg.instance_eval do
        ru = lambda { |env|
          h = { 'Content-Length' => '2' }
          if env["PATH_INFO"] =~ %r{\A/(.+)}
            h["Connection"] = $1
          end
          [ 200, h, ['HI'] ]
        }
        app(:rack, ru) { listen "#{host}:#{port}" }
        stderr_path err.path
      end
    end
    c = get_tcp_client(host, port)

    # normal response
    c.write "GET /keep-alive HTTP/1.1\r\nHost: example.com\r\n\r\n"
    buf = ''.dup
    Timeout.timeout(30) do
      buf << c.readpartial(4096) until buf =~ /HI\z/
    end
    assert_match %r{^Connection: keep-alive}, buf
    assert_raises(Errno::EAGAIN,IO::WaitReadable) { c.read_nonblock(666) }

    # we allow whatever in the response, but don't send it
    c.write "GET /whatever HTTP/1.1\r\nHost: example.com\r\n\r\n"
    buf = ''.dup
    Timeout.timeout(30) do
      buf << c.readpartial(4096) until buf =~ /HI\z/
    end
    assert_match %r{^Connection: keep-alive}, buf
    assert_raises(Errno::EAGAIN,IO::WaitReadable) { c.read_nonblock(666) }

    c.write "GET /close HTTP/1.1\r\nHost: example.com\r\n\r\n"
    buf = ''.dup
    Timeout.timeout(30) do
      buf << c.readpartial(4096) until buf =~ /HI\z/
    end
    assert_match %r{^Connection: close}, buf
    assert_equal c, IO.select([c], nil, nil, 30)[0][0]
    assert_raises(EOFError) { c.readpartial(666) }
    c.close
  ensure
    quit_wait(pid)
  end

  def test_inherit_too_many
    err = @err
    s2 = TCPServer.new(ENV["TEST_HOST"] || "127.0.0.1", 0)
    cfg = Yahns::Config.new
    host, port = @srv.addr[3], @srv.addr[1]
    cfg.instance_eval do
      ru = lambda { |_| [ 200, {'Content-Length'=>'2'}, ['HI'] ] }
      GTL.synchronize { app(:rack, ru) { listen "#{host}:#{port}" } }
      logger(Logger.new(err.path))
    end
    pid = mkserver(cfg, @srv) do
      s2.autoclose = false
      ENV["YAHNS_FD"] = "#{@srv.fileno},#{s2.fileno}"
    end
    run_client(host, port) { |res| assert_equal "HI", res.body }
    th = Thread.new do
      c = s2.accept
      c.readpartial(1234)
      c.write "HTTP/1.0 666 OK\r\n\r\nGO AWAY"
      c.close
      :OK
    end
    Thread.pass
    s2host, s2port = s2.addr[3], s2.addr[1]
    Net::HTTP.start(s2host, s2port) do |http|
      res = http.request(Net::HTTP::Get.new("/"))
      assert_equal 666, res.code.to_i
      assert_equal "GO AWAY", res.body
    end
    assert_equal :OK, th.value
    tmpc = TCPSocket.new(s2host, s2port)
    a2 = s2.accept
    assert_nil IO.select([a2], nil, nil, 0.05)
    tmpc.close
    assert_nil a2.read(1)
    a2.close
    s2.close
  ensure
    quit_wait(pid)
  end

  def test_inherit_tcp_nodelay_set
    err = @err
    cfg = Yahns::Config.new
    host, port = @srv.addr[3], @srv.addr[1]
    @srv.setsockopt(:IPPROTO_TCP, :TCP_NODELAY, 0)
    assert_equal 0, @srv.getsockopt(:IPPROTO_TCP, :TCP_NODELAY).int
    cfg.instance_eval do
      ru = lambda { |_| [ 200, { 'Content-Length' => '2' } , [ 'HI' ] ] }
      GTL.synchronize { app(:rack, ru) { listen "#{host}:#{port}" } }
      logger(Logger.new(err.path))
    end
    pid = mkserver(cfg, @srv) { ENV["YAHNS_FD"] = "#{@srv.fileno}" }
    run_client(host, port) { |res| assert_equal "HI", res.body }

    # TCP socket option is shared at file level, not FD level:
    assert_equal 1, @srv.getsockopt(:IPPROTO_TCP, :TCP_NODELAY).int
  ensure
    quit_wait(pid)
  end
end
debug log:

solving 75e1857 ...
found 75e1857 in https://yhbt.net/yahns.git

yahns Ruby server user/dev discussion

Archives are clonable:
	git clone --mirror https://yhbt.net/yahns-public
	git clone --mirror http://ou63pmih66umazou.onion/yahns-public

Example config snippet for mirrors

Newsgroups are available over NNTP:
	nntp://news.public-inbox.org/inbox.comp.lang.ruby.yahns
	nntp://ou63pmih66umazou.onion/inbox.comp.lang.ruby.yahns

 note: .onion URLs require Tor: https://www.torproject.org/

AGPL code for this site: git clone https://public-inbox.org/public-inbox.git