我正在开发一个Ruby on Rails应用程序，该应用程序使用WinRM库来访问远程Windows服务器。提供的传输是：协商，它将与远程服务器协商认证。
问题是WinRM库需要一个401 HTTP状态代码，以便它可以发送更多数据进行身份验证。但是，返回200 HTTP状态代码并且协商失败。
回溯是：
NoMethodError: undefined method `split' for nil:NilClass
from /home/cobalt/.rvm/gems/ruby-2.2.2/gems/winrm-1.7.3/lib/winrm/http/transport.rb:226:in `init_auth'
from /home/cobalt/.rvm/gems/ruby-2.2.2/gems/winrm-1.7.3/lib/winrm/http/transport.rb:166:in `send_request'
from /home/cobalt/.rvm/gems/ruby-2.2.2/gems/winrm-1.7.3/lib/winrm/winrm_service.rb:489:in `send_message'
from /home/cobalt/.rvm/gems/ruby-2.2.2/gems/winrm-1.7.3/lib/winrm/winrm_service.rb:390:in `run_wql'
from /home/cobalt/.rvm/gems/ruby-2.2.2/gems/winrm-1.7.3/lib/winrm/command_executor.rb:186:in `os_version'
from /home/cobalt/.rvm/gems/ruby-2.2.2/gems/winrm-1.7.3/lib/winrm/command_executor.rb:145:in `code_page'
from /home/cobalt/.rvm/gems/ruby-2.2.2/gems/winrm-1.7.3/lib/winrm/command_executor.rb:72:in `block in open'
from /home/cobalt/.rvm/gems/ruby-2.2.2/gems/winrm-1.7.3/lib/winrm/command_executor.rb:218:in `retryable'
from /home/cobalt/.rvm/gems/ruby-2.2.2/gems/winrm-1.7.3/lib/winrm/command_executor.rb:71:in `open'
from (irb):20
from /home/cobalt/.rvm/gems/ruby-2.2.2/gems/railties-4.2.1/lib/rails/commands/console.rb:110:in `start'
from /home/cobalt/.rvm/gems/ruby-2.2.2/gems/railties-4.2.1/lib/rails/commands/console.rb:9:in `start'
from /home/cobalt/.rvm/gems/ruby-2.2.2/gems/railties-4.2.1/lib/rails/commands/commands_tasks.rb:68:in `console'
from /home/cobalt/.rvm/gems/ruby-2.2.2/gems/railties-4.2.1/lib/rails/commands/commands_tasks.rb:39:in `run_command!'
from /home/cobalt/.rvm/gems/ruby-2.2.2/gems/railties-4.2.1/lib/rails/commands.rb:17:in `<top (required)>'
from bin/rails:4:in `require'
from bin/rails:4:in `<main>'2.2.2 :021 >
TCP转储显示以下包交换
tcpdump: verbose output suppressed, use -v or -vv for full protocol decode listening on eth0, link-type EN10MB (Ethernet), capture size 65535 bytes
12:04:08.372376 IP d8b5d56cba65.53166 > pokcpeusap02.corp.absc.local.wsman: Flags [S], seq 2899844066, win 29200, options [mss 1460,sackOK,TS val 1316187676 ecr 0,nop,wscale 7], length 0
0x0000: 4500 003c 75fe 4000 4006 d486 0400 0005 E..<u.@.@.......
0x0010: 0acd e165 cfae 1761 acd8 1be2 0000 0000 ...e...a........
0x0020: a002 7210 f065 0000 0204 05b4 0402 080a ..r..e..........
0x0030: 4e73 6e1c 0000 0000 0103 0307 Nsn.........
12:04:08.421019 IP pokcpeusap02.corp.absc.local.wsman > d8b5d56cba65.53166: Flags [S.], seq 3702856093, ack 2899844067, win 8192, options [mss 1351,nop,wscale 8,sackOK,TS val 79780711 ecr 1316187676],
length 0
0x0000: 4500 003c 7f04 4000 7d06 8e80 0acd e165 E..<..@.}......e
0x0010: 0400 0005 1761 cfae dcb5 199d acd8 1be3 .....a..........
0x0020: a012 2000 754e 0000 0204 0547 0103 0308 ....uN.....G....
0x0030: 0402 080a 04c1 5b67 4e73 6e1c ......[gNsn.
12:04:08.421047 IP d8b5d56cba65.53166 > pokcpeusap02.corp.absc.local.wsman: Flags [.], ack 1, win 229, options [nop,nop,TS val 1316187725 ecr 79780711], length 0
0x0000: 4500 0034 75ff 4000 4006 d48d 0400 0005 E..4u.@.@.......
0x0010: 0acd e165 cfae 1761 acd8 1be3 dcb5 199e ...e...a........
0x0020: 8010 00e5 f05d 0000 0101 080a 4e73 6e4d .....]......NsnM
0x0030: 04c1 5b67 ..[g
12:04:08.421368 IP d8b5d56cba65.53166 > pokcpeusap02.corp.absc.local.wsman: Flags [P.], seq 1:340, ack 1, win 229, options [nop,nop,TS val 1316187725 ecr 79780711], length 339
0x0000: 4500 0187 7600 4000 4006 d339 0400 0005 E...v.@.@..9....
0x0010: 0acd e165 cfae 1761 acd8 1be3 dcb5 199e ...e...a........
0x0020: 8018 00e5 f1b0 0000 0101 080a 4e73 6e4d ............NsnM
0x0030: 04c1 5b67 504f 5354 202f 7773 6d61 6e20 ..[gPOST./wsman.
0x0040: 4854 5450 2f31 2e31 0d0a 4175 7468 6f72 HTTP/1.1..Author
0x0050: 697a 6174 696f 6e3a 204e 6567 6f74 6961 ization:.Negotia
0x0060: 7465 2054 6c52 4d54 564e 5455 4141 4241 te.TlRMTVNTUAABA
0x0070: 4141 414e 3449 4934 4151 4142 4141 6741 AAAN4II4AQABAAgA
0x0080: 4141 4141 4141 4141 4351 4141 4142 4462 AAAAAAAACQAAABDb
0x0090: 334a 775a 4468 694e 5751 314e 6d4e 6959 3JwZDhiNWQ1NmNiY
0x00a0: 5459 310d 0a43 6f6e 7465 6e74 2d54 7970 TY1..Content-Typ
0x00b0: 653a 2061 7070 6c69 6361 7469 6f6e 2f73 e:.application/s
0x00c0: 6f61 702b 786d 6c3b 6368 6172 7365 743d oap+xml;charset=
0x00d0: 5554 462d 380d 0a55 7365 722d 4167 656e UTF-8..User-Agen
0x00e0: 743a 2052 7562 7920 5769 6e52 4d20 436c t:.Ruby.WinRM.Cl
0x00f0: 6965 6e74 2028 322e 372e 312c 2072 7562 ient.(2.7.1,.rub
0x0100: 7920 322e 322e 3220 2832 3031 352d 3034 y.2.2.2.(2015-04
0x0110: 2d31 3329 290d 0a41 6363 6570 743a 202a -13))..Accept:.*
0x0120: 2f2a 0d0a 4461 7465 3a20 5475 652c 2030 /*..Date:.Tue,.0
0x0130: 3720 4d61 7220 3230 3137 2031 323a 3034 7.Mar.2017.12:04
0x0140: 3a30 3820 474d 540d 0a43 6f6e 7465 6e74 :08.GMT..Content
0x0150: 2d4c 656e 6774 683a 2030 0d0a 486f 7374 -Length:.0..Host
0x0160: 3a20 706f 6b63 7065 7573 6170 3032 2e63 :.pokcpeusap02.c
0x0170: 6f72 702e 6162 7363 2e6c 6f63 616c 3a35 orp.absc.local:5
0x0180: 3938 350d 0a0d 0a 985....
12:04:08.516497 IP pokcpeusap02.corp.absc.local.wsman > d8b5d56cba65.53166: Flags [P.], seq 1:39, ack 340, win 256, options [nop,nop,TS val 79780721 ecr 1316187725], length 38
0x0000: 4500 005a 7f05 4000 7d06 8e61 0acd e165 E..Z..@.}..a...e
0x0010: 0400 0005 1761 cfae dcb5 199e acd8 1d36 .....a.........6
0x0020: 8018 0100 11f4 0000 0101 080a 04c1 5b71 ..............[q
0x0030: 4e73 6e4d 4854 5450 2f31 2e31 2032 3030 NsnMHTTP/1.1.200
0x0040: 204f 4b0d 0a43 6f6e 7465 6e74 2d4c 656e .OK..Content-Len
0x0050: 6774 683a 2030 0d0a 0d0a gth:.0....
12:04:08.516541 IP d8b5d56cba65.53166 > pokcpeusap02.corp.absc.local.wsman: Flags [.], ack 39, win 229, options [nop,nop,TS val 1316187821 ecr 79780721], length 0
0x0000: 4500 0034 7601 4000 4006 d48b 0400 0005 E..4v.@.@.......
0x0010: 0acd e165 cfae 1761 acd8 1d36 dcb5 19c4 ...e...a...6....
0x0020: 8010 00e5 f05d 0000 0101 080a 4e73 6ead .....]......Nsn.
0x0030: 04c1 5b71 ..[q
会出现什么问题？为什么我没有获得401 HTTP状态代码？
答案 0 :(得分：0)
我找到了问题的根本原因。事实证明，有另一个服务，而不是WinRM srevice正在侦听端口5985.因此，当请求发送到该端口时，该服务响应需要基本身份验证和状态代码200的响应。启动WinRM服务后问题得到解决并让它在5985港口听。
详细分析可在Ruby WinRM undefined method `split' for nil:NilClass找到。这真的是一个很好的教训。有时问题非常简单和愚蠢，但要找出问题需要付出很多努力。