WebSockets on iOS with Starscream

astralbodies · November 14, 2016, 2:00pm

Learn how to use Starscream to add always-on networking with WebSockets in this iOS tutorial.

This is a companion discussion topic for the original entry at https://www.raywenderlich.com/861-websockets-on-ios-with-starscream

zarzonis · November 15, 2016, 11:53am

This is an interesting tutorial. I have one problem though. I was able to run the app on simulator and send messages between the simulator and Safari without any problem. When i install the app on my iPhone 7 Plus, i can’t get past the username screen. Each time i press the next button, the websocketDidDisconnect gets called and i go back to the username selection screen. I get this message at the Xcode console: __nw_connection_get_connected_socket_block_invoke 1 Connection has no connected handler
Do you know how i can fix this?
Thanks.

EDIT: I even tried the demo project of StarScream from their Github page and i have the same problem.

astralbodies · November 15, 2016, 5:47pm

You’ll have to find out what the IP address of your computer is and update the app to connect to that instead of localhost.

zarzonis · November 15, 2016, 6:30pm

Now it works perfectly! Thanks Aaron!

rjayasinghe · January 19, 2017, 10:12pm

I’m getting an error “Optional(Error Domain=WebSocket Code=200 “Invalid HTTP upgrade” UserInfo={NSLocalizedDescription=Invalid HTTP upgrade})” - what is causing this?

vupv4 · January 22, 2017, 3:57pm

Hello,
I trying to create Chat Server Socket with Java language. I created simple server using Mina apache (https://mina.apache.org/mina-project/userguide/ch2-basics/sample-tcp-server.html) but Client can not connect to this chat server. Can you give me a simple server code in Java ?

Thanks for your help.
Vu

gbacklin · January 22, 2017, 6:59pm

Hello,

I am attempting to access stream data using Starscream web sockets, which is working on traditional calls, but not on the below as I need to have the --user USERNAME:TOKEN

curl --user USERNAME:TOKEN https://streamingxxxxxxx.com/stream/KEY/?values=value1,valu2,value3,value4

This works just fine in a Terminal window (Mac OS X), but my question is how would I handle the authorization --user USERNAME:TOKEN in a WebSocket call. I have tried in the socket header but that did not work. I have also tried wss:// which did not work.

I am using Swift 3.0.

Thank you

irillll · April 26, 2017, 10:50am

got same problems. how to fix it?

astralbodies · April 26, 2017, 12:07pm

@vupv4 & @gbacklin There’s some weird thing with Apple’s networking implementation that came up in a Starscream issue on GitHub. Try using 127.0.0.1 or the IP address of your machine instead of localhost.

If that works, please let me know and I’ll update the tutorial.

harariyakamal · May 31, 2017, 7:07pm

This worked in browser first time but after 3 messages it thrown some error and when I tried restarted the server I see this error.

events.js:182
throw er; // Unhandled ‘error’ event
^

Error: listen EADDRINUSE :::1337
at Object.exports._errnoException (util.js:1026:11)
at exports._exceptionWithHostPort (util.js:1049:20)
at Server.setupListenHandle [as _listen2] (net.js:1305:14)
at listenInCluster (net.js:1353:12)
at Server.listen (net.js:1453:7)
at Object. (/Users/Harariya/Documents/Chat_Sample/EmojiTransmitter/nodeapp/chat-server.js:41:8)
at Module._compile (module.js:569:30)
at Object.Module._extensions…js (module.js:580:10)
at Module.load (module.js:503:32)
at tryModuleLoad (module.js:466:12)

I am not sure what went wrong or what did I miss.

joshswift · November 3, 2017, 6:23pm

Thanks for your great tutorial.

As a new developer of iOS, can I ask you one question? How could I use the example to build an app with location sharing? Or is there any other example for reference?

Thanks again.

shogunkaramazov · November 16, 2017, 11:11pm

This tutorial is more than six months old so questions are no longer supported at the moment for it. We will update it as soon as possible. Thank you! :]