[IPP] MIME attachments in IPP

[IPP] MIME attachments in IPP

[IPP] MIME attachments in IPP

Michael Sweet msweet at apple.com
Fri Jun 13 14:38:05 UTC 2014


On Jun 13, 2014, at 7:50 AM, Zehler, Peter <Peter.Zehler at xerox.com> wrote:

> All,
> I just wanted to check that IPP uses HTTP chunking and that the document data is inline in the request and not in a separate MIME attachment.

Correct, application/ipp allows for trailing document data, per RFC 2910/2911.  This better allows for alternate transports (although the focus is obviously on HTTP).

>  I was asked and I don’t see anything in the encoding specification that puts the data in a MIME attachment.  I think WS-Print/scan did it that way.  The confusion is over the Get-Next-Document-Images operation that  includes
> -----------------------------------------------
> Group 3: Document content
> The document content is sent as a MIME attachment. Note that the IPP Scan Client
> MUST be ready to accept a chunked response.
> -----------------------------------------------
> I think I should strike the clause “The document content is sent as a MIME attachment.”

Right, we should just say that the document content follows the end-of-attributes-tag.  You can probably steal the Print-Job example from RFC 2910 (http://tools.ietf.org/html/rfc2910#page-33).

> Pete
> Peter Zehler
> <image001.png>
> Email: Peter.Zehler at Xerox.com
> Office: +1 (585) 265-8755
> Mobile: +1 (585) 329-9508
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> US Mail: Peter Zehler
> Palo Alto Research Center Incorporated
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Michael Sweet, Senior Printing System Engineer, PWG Chair

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