FormHttpMessageConverter doesn't support utf-8 filename [SPR-16061]

[spring-projects-issues]

Xinyi.Liu opened SPR-16061 and commented

I want to use FeignClient to pass MultipartFile .https://github.com/pcan/feign-client-test this project doesn't work with chinese filename,maybe all non-ascII filename.
At first i find this jira #19115
then i upgrade spring-boot-starter to 1.5.7.RELEASE
but it still doesn't work!
Then i debuged again to find why,FormHttpMessageConverter line 408 getFilename seems to support filename*= , but FormHttpMessageConverter line 368 doesn't pass a charset to HttpHeaders line 682 , and at line 708 charset seems to be Deprecated.
I tried UrlEncoder to encode filename and set FormHttpMessageConverter.setMultipartCharset
in github project file FeignSpringFormEncoder,none of my tries works.

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Affects: 4.3.11

Reference URL: https://github.com/pcan/feign-client-test

Issue Links:

• HttpHeaders.setContentDispositionFormData() doesn't encode non-acsii characters correctly [SPR-14547] #19115 HttpHeaders.setContentDispositionFormData() doesn't encode non-acsii characters correctly

[spring-projects-issues]

Brian Clozel commented

Hi Xinyi.Liu,

Sorry for the late feedback.

Before you raised this issue, we've improved the behavior there in #18979 - filenames should support utf-8 by default now.

Do you have a small code snippet I can take a look at that reproduces this issue? Looking at the Feign support project is a bit too much scope for this.

Thanks!