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5aa1a378ef
I'm a bit dumb and forgot to add code that frees journal.Reader instances from memory. Co-authored-by: nhnn <nhnn@disroot.org> Co-authored-by: Inex Code <inex.code@selfprivacy.org> Reviewed-on: https://git.selfprivacy.org/SelfPrivacy/selfprivacy-rest-api/pulls/158 Reviewed-by: Inex Code <inex.code@selfprivacy.org> Co-authored-by: nhnn <nhnn@noreply.git.selfprivacy.org> Co-committed-by: nhnn <nhnn@noreply.git.selfprivacy.org>
73 lines
1.9 KiB
Python
73 lines
1.9 KiB
Python
import typing
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from systemd import journal
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def get_events_from_journal(
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j: journal.Reader, limit: int, next: typing.Callable[[journal.Reader], typing.Dict]
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):
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events = []
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i = 0
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while i < limit:
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entry = next(j)
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if entry is None or entry == dict():
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break
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if entry["MESSAGE"] != "":
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events.append(entry)
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i += 1
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return events
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def get_paginated_logs(
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limit: int = 20,
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# All entries returned will be lesser than this cursor. Sets upper bound on results.
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up_cursor: str | None = None,
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# All entries returned will be greater than this cursor. Sets lower bound on results.
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down_cursor: str | None = None,
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# All entries will be from a specific systemd slice
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filterBySlice: str | None = None,
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# All entries will be from a specific systemd unit
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filterByUnit: str | None = None,
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):
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j = journal.Reader()
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if filterBySlice:
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j.add_match("_SYSTEMD_SLICE=" + filterBySlice)
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if filterByUnit:
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j.add_match("_SYSTEMD_UNIT=" + filterByUnit)
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if up_cursor is None and down_cursor is None:
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j.seek_tail()
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events = get_events_from_journal(j, limit, lambda j: j.get_previous())
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events.reverse()
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j.close()
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return events
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elif up_cursor is None and down_cursor is not None:
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j.seek_cursor(down_cursor)
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j.get_previous() # pagination is exclusive
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events = get_events_from_journal(j, limit, lambda j: j.get_previous())
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events.reverse()
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j.close()
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return events
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elif up_cursor is not None and down_cursor is None:
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j.seek_cursor(up_cursor)
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j.get_next() # pagination is exclusive
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events = get_events_from_journal(j, limit, lambda j: j.get_next())
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j.close()
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return events
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else:
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j.close()
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raise NotImplementedError(
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"Pagination by both up_cursor and down_cursor is not implemented"
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)
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