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<h4>3.3.1 Ordinary File Cards</h4>
For sync protocols, artifacts are transferred using "file"
cards. File cards come in two different formats depending
on whether the artifact is sent directly or as a
[../delta_format.wiki|delta] from some
other artifact.
<blockquote>
<b>file</b> <i>artifact-id size</i> <b>\n</b> <i>content</i><br>
<b>file</b> <i>artifact-id delta-artifact-id size</i> <b>\n</b> <i>content</i>
</blockquote>
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<h4>3.3.1 Ordinary File Cards</h4>
For sync protocols, artifacts are transferred using "file"
cards. File cards come in two different formats depending
on whether the artifact is sent directly or as a
[./delta_format.wiki|delta] from some
other artifact.
<blockquote>
<b>file</b> <i>artifact-id size</i> <b>\n</b> <i>content</i><br>
<b>file</b> <i>artifact-id delta-artifact-id size</i> <b>\n</b> <i>content</i>
</blockquote>
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is being transferred. The artifact ID is the lower-case hexadecimal
representation of the name hash for the artifact.
The last argument of the file card is the number of bytes of
payload that immediately follow the file card. If the file
card has only two arguments, that means the payload is the
complete content of the artifact. If the file card has three
arguments, then the payload is a
[../delta_format.wiki|delta] and second argument is
the ID of another artifact that is the source of the delta.
File cards are sent in both directions: client to server and
server to client. A delta might be sent before the source of
the delta, so both client and server should remember deltas
and be able to apply them when their source arrives.
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is being transferred. The artifact ID is the lower-case hexadecimal
representation of the name hash for the artifact.
The last argument of the file card is the number of bytes of
payload that immediately follow the file card. If the file
card has only two arguments, that means the payload is the
complete content of the artifact. If the file card has three
arguments, then the payload is a
[./delta_format.wiki|delta] and the second argument is
the ID of another artifact that is the source of the delta.
File cards are sent in both directions: client to server and
server to client. A delta might be sent before the source of
the delta, so both client and server should remember deltas
and be able to apply them when their source arrives.
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