fix(actix-http): wake before return pending when read half disconnect and need to shutdown

[bitcapybara]

PR Type

Bug Fix

PR Checklist

• [ ] Tests for the changes have been added / updated.
• [ ] Documentation comments have been added / updated.
• [ ] A changelog entry has been made for the appropriate packages.
• [x] Format code with the latest stable rustfmt.
• [ ] (Team) Label with affected crates and semver status.

Overview

Closes #1313

In our application, we use actix-web to forward websocket data to another service. During runtime, we discovered that when the browser closes the connection, actix-web cannot detect this event, causing tokio's io::copy call to block indefinitely. Through testing, we found that in the Dispatcher's poll method, there are the following two issues:

Because inner_p.state is not None, READ_DISCONNECT cannot be detected After returning Poll::Pending, the Dispatcher will not be polled again

This PR resolves the above two issues, allowing the client disconnect event to be properly detected and the process to exit normally.