feat: handle_extra_info add set req body

[hongdingyi]

Description

Fixes # (issue)

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)

[hongdingyi]

fix:handle_extra_info

[hongdingyi]

[hongdingyi]

You should add a type。in apisix/apisix-3.1.0/deps/share/lua/5.1/A6/ExtraInfo

[hongdingyi]

add extra info type

[spacewander]

Let's add test in https://github.com/apache/apisix/blob/master/t/plugin/ext-plugin/request-body.t

[spacewander]

Could you add the new field in https://github.com/api7/ext-plugin-proto?
You can read https://github.com/apache/apisix/blob/master/docs/en/latest/internal/plugin-runner.md for the implemented detail.

[rubikplanet]

feature required

[github-actions]

This pull request has been marked as stale due to 60 days of inactivity. It will be closed in 4 weeks if no further activity occurs. If you think that's incorrect or this pull request should instead be reviewed, please simply write any comment. Even if closed, you can still revive the PR at any time or discuss it on the dev@apisix.apache.org list. Thank you for your contributions.

[moonming]

Is this the same as #9990? @monkeyDluffy6017

[monkeyDluffy6017]

@moonming It's two different things

[moonming]

@moonming It's two different things

So what problems and scenarios does this PR solve? @monkeyDluffy6017

[shreemaan-abhishek]

@hongdingyi what problem does this PR solve?

[Revolyssup]

This PR requires to add a field in this file https://github.com/api7/ext-plugin-proto/blob/4af76c210e00ead699489cfeb055d8b9bb7596ed/ext-plugin.fbs#L121

@moonming @shreemaan-abhishek @monkeyDluffy6017
As far as I can see, this PR and #9990 are kind of similar. Both set the request's body but at different stage.
The one that is merged sets the request body by signalling it in the response of the RPC. After that the request is sent to the upstream.
This PR on the other hand allows to set the request body using handle_extra_info function which facilitates communication between plugin runner and APISIX while the plugin runner is still processing the request. Here after the request is set, the request won't be sent to upstream immediately as the Reply isn't yet sent by the plugin runner. The plugin runner can do some more things.

Conclusion:
According to me, this PR is not required because after the request is set to something, why should plugin runner do anything else on it. It doesn't seem like something that should happen with handle_extra_info. This can be achieved by the reply of the HTTPReq RPC call.

@hongdingyi In case I am missing some scenario where this actually will be required and just setting the request body using the Reply of the RPC wouldn't justify the use case, please let me know.

[shreemaan-abhishek]

let's wait for @hongdingyi's input. It seems the github actions were not triggered properly so I just made them re-run.

[github-actions]

This pull request has been marked as stale due to 60 days of inactivity. It will be closed in 4 weeks if no further activity occurs. If you think that's incorrect or this pull request should instead be reviewed, please simply write any comment. Even if closed, you can still revive the PR at any time or discuss it on the dev@apisix.apache.org list. Thank you for your contributions.

[monkeyDluffy6017]

@hongdingyi are you still working on the pr?

[github-actions]

This pull request has been marked as stale due to 60 days of inactivity. It will be closed in 4 weeks if no further activity occurs. If you think that's incorrect or this pull request should instead be reviewed, please simply write any comment. Even if closed, you can still revive the PR at any time or discuss it on the dev@apisix.apache.org list. Thank you for your contributions.

[Revolyssup]

@hongdingyi Can you fix the lint check?

[Revolyssup]

closed because reason not provided