node_modules/wsc/node_modules/ws/lib/WebSocket.js:721:12

[qdhaiqiang]

我的环境里发生了这种错误，请问下是什么原因呢？

[qdhaiqiang]

events.js:167
throw er; // Unhandled 'error' event
^

Error: unexpected server response (200)
at ClientRequest.response (/usr/local/lib/node_modules/wsc/node_modules/ws/lib/WebSocket.js:719:15)
at Object.onceWrapper (events.js:275:13)
at ClientRequest.emit (events.js:182:13)
at HTTPParser.parserOnIncomingClient [as onIncoming] (_http_client.js:534:21)
at HTTPParser.parserOnHeadersComplete (_http_common.js:109:17)
at Socket.socketOnData (_http_client.js:421:20)
at Socket.emit (events.js:182:13)
at addChunk (_stream_readable.js:280:12)
at readableAddChunk (_stream_readable.js:265:11)
at Socket.Readable.push (_stream_readable.js:220:10)
Emitted 'error' event at:
at ClientRequest.response (/usr/local/lib/node_modules/wsc/node_modules/ws/lib/WebSocket.js:721:12)
at Object.onceWrapper (events.js:275:13)
[... lines matching original stack trace ...]
at Socket.Readable.push (_stream_readable.js:220:10)

[easytarget]

Bit late to the party, but in case anybody else washes up here.. The clue is in the error line:

Error: unexpected server response (200)

This means you have connected to a web server, not a websocket server..

eg: I have a device with a web server on port 80, and a websocket server on port 81:

$ wsc ws://10.0.0.112:80
wsc ws://10.0.0.112:80
events.js:291
      throw er; // Unhandled 'error' event
      ^

Error: unexpected server response (200)
    at ClientRequest.response (/usr/local/lib/node_modules/wsc/node_modules/ws/lib/WebSocket.js:719:15)
    at Object.onceWrapper (events.js:421:26)
etc....

$ wsc ws://10.0.0.112:81
Connected to ws://10.0.0.112:81
< CURRENT_ID:0
< ACTIVE_ID:0
< PING:0
>