Multiple subscrib to same scrip

vcb

Hello,

Currently, when it is needed to reconnect to websocket, i am sending a "unsubscribe" to all the scrips subscribed previously and then sending the "subscribe" to the websocket.

Wondering if "first unsubscribe then subscribe" is the right thing to do ?

rakeshr

when it is needed to reconnect to websocket

Didn't get you? All websocket connections are flushed at the end of the day. You need to generate a new access token for the next day.

vcb

Didn't get you?

Ok, this situation happens sometimes within the course for the day. If internet conection from one provider goes down, connection is switched to another internet provider.

rakeshr

situation happens sometimes within the course for the day

Yes, for within the active websocket session, the above flow seems fine.

vcb

Ok, so, if the websocket is "close"d without "unsubscrib"ing and connected again after a few seconds (through another internet provider), and again a "subscribe" is sent, would the same scrips be subscribed twice ? Would the same quote for the same scrips be transmitted twice ?

rakeshr

if the websocket is "close"d without "unsubscrib"ing and connected again after a few seconds (through another internet provider),

Once the underlying network changes, mostly the current websocket connection will be closed. And would require a fresh subscription.

again a "subscribe" is sent, would the same scrips be subscribed twice ? Would the same quote for the same scrips be transmitted twice ?

No, transmission instrument_tokens will always be unique, even if you send duplicate subscription items.