fix(server): clean up vestigial code from proxy

[jginsburgn]

When using the proxy feature of Karma, the target value can include the scheme. It was used to determine the https variable to be sent to the http-proxy .createProxyServer method. However, it is now disregarded by that package. Therefore, this PR cleans it up.

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[devoto13]

The fix looks correct to me. An example would be a path-only proxy when Karma is configured to run over https. E.g.

{
  protocol: 'https',
  proxies: {
    '/img/': '/base/test/images/'
  }
  ...
}

> url.parse('/base/test/images/')
Url {
  protocol: null,
  slashes: null,
  auth: null,
  host: null,
  port: null,
  hostname: null,
  hash: null,
  search: null,
  query: null,
  pathname: '/base/test/images/',
  path: '/base/test/images/',
  href: '/base/test/images/'
}

See Loading assets section (near the end): http://karma-runner.github.io/6.0/config/files.html

Can you add a test case based on the above example, please?

[johnjbarton]

Yes the test would clarify the use case

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[jginsburgn]

Upon trying to add a test for the use case that @devoto13 mentioned, I figured that it makes no sense to have a comms protocol (e.g. https or http) when proxying requests between paths. That is because the target path is in the local filesystem and no connection should be done.

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[jginsburgn]

Investigating more, the NPM module http-proxy that we are using, does not make use of the https variable that we were sending it. Also, it disregards the agent configuration. Therefore, I cleaned this logic up and its corresponding tests.

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[devoto13]

The naming is confusing.

I haven't really debugged it, but from a quick code scan the agent option is copied into requestOptions here and passed through here and here to here and eventually into agent option of the request() method from either http or https module, which you referenced in you comment.

[jginsburgn]

@devoto13 you're right! I missed that path :/. Let me fix this PR.

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[devoto13]

LGTM

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🎉 This PR is included in version 6.3.3 🎉

The release is available on:

• npm package (@latest dist-tag)
• GitHub release

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