c# - Websocket server on Azure -

i'm trying host websockets server on azure. i'm bit confused , hoping me.

i've followed many articles code close 1 article : https://azure.microsoft.com/en-us/blog/introduction-to-websockets-on-windows-azure-web-sites/

public void processrequest(httpcontext context) {     if (context.iswebsocketrequest)     {         context.acceptwebsocketrequest(processws);     } }  public bool isreusable { { return false; } }  private async task processws(aspnetwebsocketcontext context) {     try     {         websocket socket = context.websocket;         while (true)         {             var url = context.requesturi;             arraysegment<byte> buffer = new arraysegment<byte>(new byte[1024]);             websocketreceiveresult result = await socket.receiveasync(buffer, cancellationtoken.none);             if (socket.state == websocketstate.open)             {                 string usermessage = encoding.utf8.getstring(buffer.array, 0, result.count)                                             .trim(new char[] { ' ' }); // remove spaces before , after                 //             }             else             {                 break;             }         }     }     catch (exception e)     {         log.info("exception" + e.message + " >>>" + e.stacktrace);     } } 

this works fine, i'm able messages devices , answer them.

but in cases need send message device, example :

device sends "tell device b blink"

since it's websockets server , device b has talked server should have somewhere connection opened device b. , when device asks me can send message device b.

but how can achieve code ? how can find connection device b ? if not possible how should ?

i hope problem described enough understood.

thank you,

but how can achieve code ? how can find connection device b ? if not possible how should ?

according scenario, followed tutorial webapi-and-websockets , implement my web api project establish connection between clients. here screenshoot test, refer it:

additionally, leverage signalr , map client (user) signalr connections. more details, refer mapping signalr users connections. also, refer git sample microsoft.aspnet.signalr.samples.

update:

how use signalr in case ?

for simple way, retain connection , user info stored in memory, more details, refer in-memory storage. based on scenario, wrote sample project aspdotnet-signalr-chat, refer it, , here screenshot test: