Unable to emulate upload filename browser behaviour with RestTemplate [SPR-15538]

[spring-projects-issues]

Paul opened SPR-15538 and commented

Some browsers (i.e. Chrome and Safari) can send multipart uploads with non-ascii symbols in filename like

Content-Type:multipart/form-data; boundary=----WebKitFormBoundaryNyoLBPoS0jG219lU
…omitted…
------WebKitFormBoundaryNyoLBPoS0jG219lU
Content-Disposition: form-data; name="file"; filename="фывафыва.pdf"
Content-Type: application/pdf


------WebKitFormBoundaryNyoLBPoS0jG219lU--

as you can see filename is UTF-8 string. And MultipartFile handles this correctly!
I need to emulate such behaviour with RestTemplate. Best solution I've found is to use custom FormHttpMessageConverter, but it encodes filename into base64. If I override getFilename() method, removing file encoding to base64 then question marks go to server instead of non-ascii symbols.

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Issue Links:

• StandardMultipartHttpServletRequest cannot decode multipart Content-Disposition header encoded by FormHttpMessageConverter [SPR-15205] #19769 StandardMultipartHttpServletRequest cannot decode multipart Content-Disposition header encoded by FormHttpMessageConverter

[spring-projects-issues]

Rossen Stoyanchev commented

We actually just made this change. It's included in 5.0 RC1 (see commit 75117f). Feel free to give it a try.

[spring-projects-issues]

Paul commented

Will it work with Apache http client backend?

[spring-projects-issues]

Rossen Stoyanchev commented

Apache Commons FileUpload you mean? If so yes, it will work since we put the charset in the content-type and FileUpload does use it.