fix: Check port usage correctly (fix #6519)

[dohooo]

Description

fixed: #6519

I hope there is an accurate notification when a port is occupied, as this can take a lot of time for most novices to debug. He may not be able to tell if it's a problem with his business code or a problem with the project configuration.

Additional context

Should I continue to check localhost after checking for 127.0.0.1? Because we probably don't know if the user's 127.0.0.1 domain name is localhost either, although most of them are.

---

What is the purpose of this pull request?

• Other
• Bug fix
• New Feature
• Documentation update

Before submitting the PR, please make sure you do the following

• Read the Contributing Guidelines.
• Read the Pull Request Guidelines and follow the Commit Convention.
• Check that there isn't already a PR that solves the problem the same way to avoid creating a duplicate.
• Provide a description in this PR that addresses what the PR is solving, or reference the issue that it solves (e.g. fixes #123).
• Ideally, include relevant tests that fail without this PR but pass with it.

[dohooo]

I added the corresponding tests.

[dohooo]

@Niputi thx

[Niputi]

please move the test to the playground folder which contains the tests

[dohooo]

please move the test to the playground folder which contains the tests

ok

[dohooo]

I've already moved. Thanks for the tip. @Niputi

[Niputi]

the test is failing

[dohooo]

the test is failing

I see it looks like the dependency install failed how do I restart it?

[dohooo]

the test is failing

Test was passed.

[bluwy]

@dohooo I'm a bit confused. Port checking and using incremented ports are already available for dev and preview commands. It looks like the core issue is that Vite fails to detect port 5000 being occupied on macos, but I don't see how this change fixes it, can you elaborate on your changes here?

[dohooo]

@dohooo I'm a bit confused. Port checking and using incremented ports are already available for dev and preview commands. It looks like the core issue is that Vite fails to detect port 5000 being occupied on macos, but I don't see how this change fixes it, can you elaborate on your changes here?

The default host of vite dev server is 127.0.0.1. When I start the same port server on localhost, It can't detect occupancy. So I'll check the port on localhost again when host is 127.0.0.1.