This was a little bit too crummy. Instead, we put in a placeholder of ~,
which should be forwards-compatible with atomic session identifiers,
where ~ identifies the default session.
Additionally touches up the herm wires/paths to stick to the above more
closely.
Adds a %view task, which opens a subscription on the output sent to the
specified session. %flee closes the same.
Whenever dill sends a blit to the session, any subscribers get the
output also.
The structures here will become more reasonable once we replace ducts
with proper dill session identifiers.
In order to curb event queue growth when a client for whatever reason
isn't acking the events we send out, we implement a mechanism for
detecting such "clogging", and proactively kick subscriptions which are
adding too many events to the queue.
If the client hasn't sent an ack for ~s30, any subscription that accrues
more than 50 unacked %facts gets closed to prevent further buildup.
Upon reconnecting, the client will see %kick for the relevant
subscriptions and can open a new subscription as appropriate.
Includes a simple test for this behavior, and updates /app/dbug to be
able to display the newly tracked statistics.
Store the gall events from channel subscriptions as (vaseless) signs,
instead of serialized events. This should be smaller in memory, and
makes it more likely for noun deduplication to happen.
The cost is needing to reserialize upon channel reconnect, but this is
the less common case, and we don't expect it to be particularly slow.
Adds a cors-registry to Eyre's state that tracks allowed and rejected
origins for the purposes of CORS request handling.
For preflight requests, generates a response in-line.
For simple requests, adds CORS headers onto whatever response is given.
See also:
https://groups.google.com/a/urbit.org/g/dev/c/bb82dwEJGzM/m/q2JjNSx5BwAJ
@t further indicates to the caller (although loosely, because auras
are loosely enforced types) that the input should not contain embedded
NUL bytes, which are not valid @t.
Separately, a minor improvement has been made to the performance of
the raw hoon by pinning the gates used in the inner loop.
Prior to this commit, there was a jet mismatch in to-wain (formerly
called lore, and still jetted under that name). 0 bytes in the middle of
a cord caused the jet to crash, whereas the hoon simply treated them as
the end of cord and truncated the output. The history of this behavior
is fraught with controversy. This commit rectifies the current mess with
the following rationale: Null bytes are valid ASCII/UTF-8, and \n\n in
the input will cause null list items in the output, so nulls are (for
the purposes of to-wain) allowed in cords. Trailing nulls cannot be
represented because of the nature of atoms, but that is outside the
scope of to-wain's concern. Therefore to-wain should simply measure the
cord and split on newlines, and do nothing fancy at all with nulls.
In addition, the hoon for to-wain was written in an inefficient style
that produced a lot of intermediate garbage atoms via rsh and cat. This
commit's implementation measures once and cuts once, so to speak, and so
avoids the intermediate garbage. Quick benchmarks suggest it is about
20x faster than the old hoon, but still orders of magnitude slower than
the jetted code. to-wain is the workhorse for the txt mark, so we should
still prefer to have a jet.
The old jet is left wired up under %lore, and should be removed when
support for the old, unupgraded zuse is no longer necessary. A new jet
with matching null handling has been wired up under the name %leer.
Depending on the additions to term.c made in 467d8d239 allows dill to
forget about ansi escape codes, and pass styled text nouns straight on
to vere.
Also removes a bit of logic from drum, which assumed things about the
rendering of escape codes to adjust cursor positioning. Now it simply
states the semantic cursor position, letting the runtime deal with the
potential influence of styling.
Jael now stores a `step` that is combined with the original salt to
produce a new code. A `%step` card is used to increment that value,
and effectively resetting the keys. Because the first `step` is zero,
the first code is the same as before.
Eyre was changed to be notified with `%code-changed` so it can forget
old cookies, sessions and discard all the existing channels.
A new generator was added |code, that does both querying and
resetting the code
|code :: shows current code, step and help
|code %reset :: changes the code
The old +code generator still works correctly.
RFC2396 defines[1] unreserved characters as alphanumerics and nine "mark"
characters. We were only parsing for four of those, leading to parsing failure
for valid URLs.
[1]: https://tools.ietf.org/html/rfc2396#appendix-A
