bug: `ExtraInfoResponse` class `getResult` method bug

[joyyir]

Please answer these questions before submitting a pull request

• Why submit this pull request?

• [x] Bugfix

• [ ] New feature provided

• [ ] Improve performance

• Related issues

  243

---

Bugfix

• Description see #243

• How to fix?

  • Instead of casting to char, cast to byte
  • setBody with byte array instead of String
  • getBody with Charset

    ---

    New feature or improvement

• Describe the details and related test reports.

• Source branch

• Related commits and pull requests

• Target branch

[nic-chen]

This is a breaking change, even though the original bug existed.

We should add new methods to solve this issue, and then remove the problematic methods in a later version, what do you think?

[joyyir]

This is a breaking change, even though the original bug existed.

We should add new methods to solve this issue, and then remove the problematic methods in a later version, what do you think?

I agree. I'll try to write another version, so please review it later.

[joyyir]

Added a new method while maintaining the original method.

[nic-chen]

hi @joyyir please fix the failed CI , thanks.

[joyyir]

hi @joyyir please fix the failed CI , thanks.

Okay, I've added license header. Thanks.