change: refactor logic for enabling L4/L7 proxy

[Revolyssup]

Description

Fixes #9600
This PR refactors the logic as explained in the issue above.

Checklist

• I have explained the need for this PR and the problem it solves
• I have explained the changes or the new features added to this PR
• I have added tests corresponding to this change
• I have updated the documentation to reflect this change
• I have verified that this change is backward compatible (If not, please discuss on the APISIX mailing list first)

[Revolyssup]

@leslie-tsang @monkeyDluffy6017 Please review and make suggestions.

[kingluo]

Literally compare with "http", "stream" and "http&stream" here.

[Revolyssup]

done

[kingluo]

fix the indent.

[Revolyssup]

done

[monkeyDluffy6017]

Hi @Revolyssup, test cases are needed

[monkeyDluffy6017]

You need to remove the configuration stream_proxy.only in all files, like

1. https://github.com/apache/apisix/blob/master/t/cli/test_tls_over_tcp.sh#L26
2. https://github.com/apache/apisix/blob/master/apisix/cli/ops.lua#L274

[Revolyssup]

You need to remove the configuration stream_proxy.only in all files, like

1. https://github.com/apache/apisix/blob/master/t/cli/test_tls_over_tcp.sh#L26
2. https://github.com/apache/apisix/blob/master/apisix/cli/ops.lua#L274

I have changed all test files to respect proxy_mode and removed stream_proxy.only

[Revolyssup]

@monkeyDluffy6017 Please approve CI again.

[monkeyDluffy6017]

@Revolyssup I find that many places in our code rely on the stream_proxy variable to control the stream switch, so if you want to use proxy_mode to control it, you'll need to change these places, like

1. https://github.com/apache/apisix/blob/master/apisix/cli/ngx_tpl.lua#L127
2. https://github.com/apache/apisix/blob/master/apisix/admin/init.lua#L177

[Revolyssup]

@monkeyDluffy6017 I could find only those two places left to make that change. Can you approve CI now? Or point out if there is some other place I missed. I searched for stream_proxy in repo and have made the change in control statements

[monkeyDluffy6017]

Please search only: and delete the related code

[monkeyDluffy6017]

Please make the ci pass

[Revolyssup]

Please search only: and delete related code

done

[monkeyDluffy6017]

@Revolyssup Please make the ci pass

[Revolyssup]

@Revolyssup Please make the ci pass

@monkeyDluffy6017 Yeah, I am trying to figure out this is failing Details
Do you have a clue?

[monkeyDluffy6017]

It says failed to enable stream proxy and http proxy. This should be caused by your changes, perhaps you should check the corresponding test cases

[Revolyssup]

@monkeyDluffy6017 approve CI please

[Revolyssup]

Most tests failed because of unrelated single reason. I think we need to re run the tests.

[Sn0rt]

@leslie-tsang pls take a review .