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Hard tabs *may* be searchable, so preserve them since they do
not take up any more space than a normal space. However, CR
(carriage return) is worthless and likely a sign of a buggy mail
(or spam) client anyways.
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Message-IDs should not be MIME encoded, but in case they are,
use the raw form for compatibility with ssoma and possibly
other tools. This prevents a potential problem where a
malicious client could confuse our storage layer into indexing
incorrect contents.
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Not sure how, but this should've always been AGPL-3.0+ like
the rest of the code, not GPL-3.0+
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Hopefully this gives new hackers a better overview of
how the components relate to each other.
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The document data of a search message already contains a good chunk
of the information needed to respond to OVER/XOVER commands quickly.
Expand on that and use the document data to implement OVER/XOVER
quickly.
This adds a dependency on Xapian being available for nntpd usage,
but is probably alright since nntpd is esoteric enough that anybody
willing to run nntpd will also want search functionality offered
by Xapian.
This also speeds up XHDR/HDR with the To: and Cc: headers and
:bytes/:lines article metadata used by some clients for header
displays and marking messages as read/unread.
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Using Xapian allows us to implement XROVER without forking
new processes.
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In the future, it should be possible to use this:
git ls-files | UPDATE_COPYRIGHT_HOLDER='all contributors' \
UPDATE_COPYRIGHT_USE_INTERVALS=2 \
xargs /path/to/gnulib/build-aux/update-copyright
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Spaces may be added when using header_str with Email::MIME->create,
so use the normal "header" parameter when setting Message-IDs
and References.
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We'll continue to compress long Message-IDs in URLs (which we know
about), but we will store entire Message-IDs in the Xapian database
to facilitate ease-of-lookups in external databases.
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Redundant document data increases our database size, pull the
smsg->mid off the unique term, the smsg->ts off the value, and
only generate the formatted display date off smsg->ts.
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A document may have many terms, so this hurts performance
if we blindly iterate. Unfortunately, we can't rely on the
order of the termlist just yet, either, so we must repeatedly
restart the search for now until we're ready to bump schema
versions.
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We ought to summarize subjects to avoid exploding
line lengths in the web interface.
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Consistently name mid_* functions as verbs.
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We need proper ordering of References to thread messages
correctly. We would lose this order if we load the terms
from the database, so set it directly document data.
Do not bother with a separate In-Reply-To, since Mail::Thread
just merges the IRT into References. This bumps our schema
version once again.
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Ghosts have no document data in them.
Perhaps we should just rely on terms for Message-ID
and avoid storing that in the document data...
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This can be used to quickly scan for replies in a message without
displaying an entire thread.
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This will relieve callers of the need to decode the data
we store internally in Xapian
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This shall allow us to search for replies/threads more easily.
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