annotate doc/libervia-cli/pipe.rst @ 4231:e11b13418ba6

plugin XEP-0353, XEP-0234, jingle: WebRTC data channel signaling implementation: Implement XEP-0343: Signaling WebRTC Data Channels in Jingle. The current version of the XEP (0.3.1) has no implementation and contains some flaws. After discussing this on xsf@, Daniel (from Conversations) mentioned that they had a sprint with Larma (from Dino) to work on another version and provided me with this link: https://gist.github.com/iNPUTmice/6c56f3e948cca517c5fb129016d99e74 . I have used it for my implementation. This implementation reuses work done on Jingle A/V call (notably XEP-0176 and XEP-0167 plugins), with adaptations. When used, XEP-0234 will not handle the file itself as it normally does. This is because WebRTC has several implementations (browser for web interface, GStreamer for others), and file/data must be handled directly by the frontend. This is particularly important for web frontends, as the file is not sent from the backend but from the end-user's browser device. Among the changes, there are: - XEP-0343 implementation. - `file_send` bridge method now use serialised dict as output. - New `BaseTransportHandler.is_usable` method which get content data and returns a boolean (default to `True`) to tell if this transport can actually be used in this context (when we are initiator). Used in webRTC case to see if call data are available. - Support of `application` media type, and everything necessary to handle data channels. - Better confirmation message, with file name, size and description when available. - When file is accepted in preflight, it is specified in following `action_new` signal for actual file transfer. This way, frontend can avoid the display or 2 confirmation messages. - XEP-0166: when not specified, default `content` name is now its index number instead of a UUID. This follows the behaviour of browsers. - XEP-0353: better handling of events such as call taken by another device. - various other updates. rel 441
author Goffi <goffi@goffi.org>
date Sat, 06 Apr 2024 12:57:23 +0200
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1 ==================================================
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2 pipe: send/receive data stream through shell pipes
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3 ==================================================
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5 ``pipe`` commands allow you to send or receive data stream through a Unix shell pipe.
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6 Libervia will create a network connection (using XMPP and Jingle) between you an your
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7 contact.
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9 in
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10 ==
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12 Receive data stream. Data will be send to stdout, so it can be piped out or simply print
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13 to the screen. You can specify bare jids of entities to accept stream for, by default all
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14 streams are accepted.
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16 example
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17 -------
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19 Receive a video stream, and redirect it to mpv_ so show the video::
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21 $ li pipe in | mpv -
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23 .. _mpv: https://mpv.io/
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25 out
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26 ===
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28 Send data stream. Data comes from stdin, so you may use pipe in something or just write
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29 some text.
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31 The only expected argument is the full jid of the device where the stream must be piped
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32 out.
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34 example
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35 -------
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37 Send a video to louise::
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39 $ li pipe out louise@example.org/libervia.123 < some_video.webm
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41 Send output from ``cal`` command to louise::
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43 $ cal | li pipe out louise@example.org/libervia.123