Swashbuckle.aspnetcore: Multiple IFormFile upload

[twsl]

#902 already adresses this issue, but since master/5.0.0-beta now already should support OpenAPI 3.0 standard, it is time for a bug report.

There is no support for multiple file upload via e.g. List<IFormFile>, swagger simply posts

Content-Disposition: form-data; name="files"

[object File],[object File]
-----------------------------217261477111538

instead of properly resolving the file objects to multiple files. The ui is fine tho.
See:

• https://swagger.io/docs/specification/describing-request-body/file-upload/
• https://github.com/OAI/OpenAPI-Specification/blob/master/versions/3.0.0.md#considerations-for-file-uploads
• https://github.com/OAI/OpenAPI-Specification/blob/master/versions/3.0.0.md#special-considerations-for-multipart-content

[twsl]

Correct request would look like this

Content-Disposition: form-data; name="files"; filename="file.txt"

<context>
-----------------------------217261477111538
Content-Disposition: form-data; name="files"; filename="file.txt"

<context>
-----------------------------217261477111538

I am investigating this now

[domaindrivendev]

This an open issue with the swagger-ui:
https://github.com/swagger-api/swagger-ui/issues/4600

[domaindrivendev]

It may “look” fine but it’s the UI that submits the request and it’s doing so incorrectly. It’s not sending as multiple parts.

[crclz]

I've run into the same issue

[aladd04]

I can confirm this is still an issue on the latest RC version (5) with .NET Core 3.1.

[domaindrivendev]

As mentioned above, this is an open issue with the swagger-ui and is not specific to Swashbuckle. It won't be resolved in Swashbuckle until it's resolved in the upstream swagger-ui library.

[ToMakeSense]

The swagger-ui issue should be fixed in its latest release releases/tag/v3.26.0

Bug Fixes

• OAS3 upload file when array items are type=string format=binary (#6040)

[domaindrivendev]

Will include latest version of swagger-ui with next SB release.

[domaindrivendev]

See commit 3e87212fab8c10441b592ae81fc263b1ab631acf