Contract of @RequestPart(required=false) not obeyed [SPR-12860]

[spring-projects-issues]

Rossen Stoyanchev opened SPR-12860 and commented

Currently @RequestPart(required=false) works as expected only if the part is missing altogether. It should also work if the part is present but the content is empty. Instead currently, depending on the specific HttpMessageConverter used, it may result in an HttpMessageNotReadableException instead of null.

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Affects: 4.1.6

Issue Links:

• Contract of @RequestBody(required=true) not obeyed [SPR-11828] #16447 Contract of @RequestBody(required=true) not obeyed
• Re-allow handling empty request body [SPR-12778] #17376 Re-allow handling empty request body