Re: [media-types] Feedback on a potential media type for upload chunks

[Marius Kleidl <[e-mail]>]

Hello Martin,

thanks for your response. Yes, the type parameter would not be necessary for this use case as the initial request for creating the upload resource can convey the file's media type using the Content-Type header field. Therefore, we don't have to repeat it afterwards when resuming the upload.

Best regards,
Marius Kleidl

28 feb 2024 1:19:33 Martin J. Dürst <[e-mail]>:

> Hello Marius,
> 
> Your proposal seems to make sense. Looking at the application/vnd.adobe.partial-upload, I'd suggest that you use only one parameter for the final type, rather than what they have (e.g. final_type=video, final_subtype=mp4). But I'm not even sure such a parameter is needed, because the partiality is purely in terms of a bit range if I understand correctly.
> 
> Regards,   Martin.
> 
> 
> On 2024-02-27 04:01, Marius Kleidl wrote:
>> Dear working group,
>> in the HTTP working group, we are discussing a draft for resumable uploads
>> over HTTP (
>> https://datatracker.ietf.org/doc/draft-ietf-httpbis-resumable-upload/).
>> Essentially, for each file that should be uploaded, a new upload resource
>> is created on the server. The client can then append data to this upload
>> resource by sending a PATCH request. If the transfer gets interrupted, the
>> client can query the upload resource's current offset and then resume the
>> upload by appending the remaining data using another PATCH request.
>> As required by RFC 5789, PATCH requests must include a media type to
>> describe the message content. In the case of resumable uploads, the content
>> is just a partial chunk from the file to be uploaded without any additional
>> data included in the message content (no offset or length value). This
>> chunk might be textual or binary depending on the file that should be
>> uploaded (e.g. text file or video).
>> I didn't find a registered media type in the standards tree which matches
>> those semantics. However, the vendor tree includes
>> application/vnd.adobe.partial-upload (
>> https://www.iana.org/assignments/media-types/application/vnd.adobe.partial-upload),
>> which was registered by Adobe in 2009 for uploads in their web
>> applications. Its intention seems to align with the content included in
>> PATCH requests for resumable uploads.
>> Therefore, I am thinking about a standardized media type to describe
>> partial chunks from an upload, such as application/partial-upload or
>> application/upload-chunk and would love any feedback on that idea.
>> Best regards
>> Marius Kleidl
>> 
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