CODEWITHSUNDEEP
node.js
Some User
Some User

Reputation: 5837

Node - Check for Network Connectivity

I have a Node.js app. I am trying to detect connectivity. I know how to check to see if I can reach the internet by pinging Google. However, I'm curious if there's a way to check to see if I'm connected to a network (i.e. a router) before checking to see if I can access the outside world.

Is there a way I can check to see if I'm connected to a network, but not necessarily get to the outside world? If so, how?

I know in JavaScript, I could check the navigator.onLine property. However, the navigator property doesn't exist in Node.

Upvotes: 1

Views: 3375

Answers (1)

David784
David784

Reputation: 7464

I would guess your best bet will involve os.networkInterfaces(), as described in the node.js documentation:

The os.networkInterfaces() method returns an object containing only network interfaces that have been assigned a network address.

Each key on the returned object identifies a network interface. The associated value is an array of objects that each describe an assigned network address.

The properties available on the assigned network address object include: ...

  • internal <boolean> - true if the network interface is a loopback or similar interface that is not remotely accessible; otherwise false

So you'll want to look for interfaces where internal is false.

Upvotes: 3

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