Is there an existing issue for this?

• I have searched the existing issues

Can the issue be reproduced with the default theme (daylight/midnight)?

• I was able to reproduce the issue with the default theme

Could the issue be due to extensions?

• I've ruled out the possibility that the extension is causing the problem.

Describe the problem

fetchSyncPost 在实现中，对于一切 data 参数不加区分地设定为 json 类型，但是后端 API 中，有些请求（如 upload, putFile 等）的body的类型是 HTMLForm。所以在使用这个 API 发这些请求的时候会出现错误。

见：

和：

Expected result

请修复 fetchSyncPost 的实现，让其对不同类型更加鲁棒。

Screenshot or screen recording presentation

No response

Version environment

- Version: 3.0.4
- Operating System: win10
- Browser (if used): No

Log file

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More information

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