@std/net: Add isPortAvailable, etc. #7196

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1. Xavrir commented on Jun 30, 2026

   

   Xavrir

   on Jun 30, 2026

   Last edited by Xavrir

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   Happy to take this one. To start small, I'd add a single function alongside getAvailablePort:

   function isPortAvailable(port: number, options?: { hostname?: string }): boolean

   It returns true if the TCP port can be listened on, false on Deno.errors.AddrInUse, and rethrows anything else. hostname defaults to 0.0.0.0. I put it in unstable_is_port_available.ts (the @std/net/unstable-is-port-available export), and the JSDoc is upfront that the result is racy, so it points people at port: 0 / getAvailablePort for cases where they own the listener.

   It's already written, with tests for the available, in-use, hostname, and non-AddrInUse error cases, and it passes deno task lint, deno fmt --check, and deno test. Can open the PR whenever.

   Does that shape look right to you? I can fold in getAvailablePorts(count, options?) too if that's useful, or keep this one small.

   👍React with 👍1Reacted by Sʜɪᴍᴜʀᴀ Yū
2. Xavrir

   added a commit that references this issue on Aug 7, 2026

   feat(net): add `isPortAvailable`

   ...

   This issue will close once commit e328681 is merged into the 'main' branch.

   e328681