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.net_developer #1
Member since Sep 2015 · 41 posts
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Subject: Groupchat file transfer
hello,which is best suitable for groupchat file transfer "XEP-0066-Out of Band Data" or "XEP-0096-SI File Transfer"?why?
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Alex #2
Member since Feb 2003 · 4322 posts · Location: Germany
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I would go with Out of Band data. This is also the pattern which most group chat software like HipChat, Slack, WhatsApp and others are using.

1) Client upload the file to a storage location (Webserver, Azure Blob storage, Amazon S3, Dropbox etc....)
2) Client shared the link to the file over OOB with a group (1=>n)

Alex

PS: SI is not a file transfer method, it defines Stream Initiation and negotiation which should be used with any file transfer protocol.
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.net_developer #3
Member since Sep 2015 · 41 posts
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ok ,so  should i use out of band data with SI,as specifeid in 6th section of http://www.xmpp.org/extensions/xep-0066.html?
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Alex #4
Member since Feb 2003 · 4322 posts · Location: Germany
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this would be my suggestion, but feel free to explore other options as well.

Alex
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.net_developer #5
Member since Sep 2015 · 41 posts
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ok,,thank you,,for guiding me so well.. :-)
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.net_developer #6
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can "XEP-0066-Out of Band Data" be used for single chat file transfer also?which version of it would be better with SI or without SI?
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Alex #7
Member since Feb 2003 · 4322 posts · Location: Germany
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of course you can.
You should always use SI. With SI 2 clients negotiate and agree on the file transfer method. This is important if you talk to other XMPP clients for example, or later want to add another option for the file transfer to your software.
If you run in a closed environment with your software only it will also work without SI, but I would suggest always to use SI.

Alex
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.net_developer #8
Member since Sep 2015 · 41 posts
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you mean alone SI or SI with "out of band"?
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Alex #9
Member since Feb 2003 · 4322 posts · Location: Germany
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SI alone is useless. I said I would recommend SI+OOB, while OOB without SI will work as well.

Alex
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.net_developer #10
Member since Sep 2015 · 41 posts
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ok..thank you
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