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Nice library. Thanks for this. I am wondering if someone can help me with the following this issue.
I am trying to know when a client connection was dropped. But I can't find any way to do it with this java-express. It is based on what's done in Expressjs. So to help you better understand what I'm trying to achieve, please check the following code that can be used as a GET event handler in Expressjs ... I borrowed it from https://alligator.io/nodejs/server-sent-events-build-realtime-app/#sse-express-backend
functioneventsHandler(req,res,next){// Mandatory headers and http status to keep connection openconstheaders={'Content-Type': 'text/event-stream','Connection': 'keep-alive','Cache-Control': 'no-cache'};res.writeHead(200,headers);// After client opens connection send all nests as stringconstdata=`data: ${JSON.stringify(nests)}\n\n`;res.write(data);// Generate an id based on timestamp and save res// object of client connection on clients list// Later we'll iterate it and send updates to each clientconstclientId=Date.now();constnewClient={id: clientId,
res
};clients.push(newClient);// When client closes connection we update the clients list// avoiding the disconnected onereq.on('close',()=>{console.log(`${clientId} Connection closed`);clients=clients.filter(c=>c.id!==clientId);});}
In this code, please notice the part where we have req.on('close', () => {...}) near the end of the snippet.
This allows listening to events on the request object. It could be a close event, an error event, etc.
I know that the .on() fonction is a Javascript specific function and is probably inherited by the reqobject. But I am hoping that someone could help me achieve the same thing with java-express .
Essentially, I am trying to keep track of each request until they are disconnected. And in the meantime, when I receive a POST request (in my Java code) that will have a channel property in the submitted data, I will send that to all the GET requests that were made with that same channel. I know that clients will stay connected because they are supposed to be using an EventSource() connection to connect to the server, which will in turn a response with a text/event-stream content type.
Thank you
The text was updated successfully, but these errors were encountered:
Hi guys
Nice library. Thanks for this. I am wondering if someone can help me with the following this issue.
I am trying to know when a client connection was dropped. But I can't find any way to do it with this
java-express
. It is based on what's done in Expressjs. So to help you better understand what I'm trying to achieve, please check the following code that can be used as a GET event handler in Expressjs ... I borrowed it from https://alligator.io/nodejs/server-sent-events-build-realtime-app/#sse-express-backendIn this code, please notice the part where we have
req.on('close', () => {...})
near the end of the snippet.This allows listening to events on the request object. It could be a
close
event, anerror
event, etc.I know that the
.on()
fonction is a Javascript specific function and is probably inherited by thereq
object. But I am hoping that someone could help me achieve the same thing withjava-express
.Essentially, I am trying to keep track of each request until they are disconnected. And in the meantime, when I receive a POST request (in my Java code) that will have a channel property in the submitted data, I will send that to all the GET requests that were made with that same channel. I know that clients will stay connected because they are supposed to be using an EventSource() connection to connect to the server, which will in turn a response with a text/event-stream content type.
Thank you
The text was updated successfully, but these errors were encountered: