python - Websockets — Invalid UTF-8 bytes -

i'm trying build simple echoing server websockets, can connection stay alive few seconds before error. reason i'm getting websocket closing "invalid utf-8 bytes", i'm not sure invalid bytes coming from. here websocket client:

// websocket-client.es6 this.ws = new websocket(`ws://localhost:8080/websocket-test/ws`); this.ws.onopen = (event) => {   this.ws.send('opening');   setinterval(() => {     this.ws.send('heartbeat');   }, 5000); }; this.ws.onmessage = (event) => {   console.log(event); }; this.ws.onclose = (event) => {   console.log('websocket closing: %o', event); }; this.ws.onerror = (event) => {   console.error('error: %o', event); } 

my server cherrypy ws4py:

# websocket-server.py class mywebsocket(websocket):     def received_message(self, message):         cherrypy.log('received %s' % message)         self.send(message.data, message.is_binary)      def closed(self, code, reason=none):         cherrypy.log('closed. code %s, reason: %s' % (code, reason)) 

when run app, on server side:

[10/feb/2016:16:39:42]  received opening [10/feb/2016:16:39:47]  received --heartbeat-- [10/feb/2016:16:39:52]  received --heartbeat-- [10/feb/2016:16:39:57]  received --heartbeat-- [10/feb/2016:16:40:02]  received --heartbeat-- [10/feb/2016:16:40:07]  received --heartbeat-- [10/feb/2016:16:40:12]  received --heartbeat-- [10/feb/2016:16:40:17]  received -helrtbhat-5 [10/feb/2016:16:40:22]  received -helrtbhat- 

the last 2 messages have open rectangle after second dash.

and chrome dev tools console says:

messageevent { data: "opening", type: "message" } websocket closed: closeevent { code: 1007, reason: "invalid utf-8 bytes", type: "close" } 

where these invalid bytes coming from? looks i'm doing sending normal text. thanks.

in websocket-server.py

you have line:

self.send(message.data, message.is_binary) 

so looks server thinks sending binary message chrome expecting text.

try:

self.send(message.data, message.is_text)