mirror of
https://git.anonymousland.org/anonymousland/synapse.git
synced 2024-10-01 11:49:51 -04:00
613 lines
22 KiB
Python
613 lines
22 KiB
Python
# -*- coding: utf-8 -*-
|
|
# Copyright 2015, 2016 OpenMarket Ltd
|
|
#
|
|
# Licensed under the Apache License, Version 2.0 (the "License");
|
|
# you may not use this file except in compliance with the License.
|
|
# You may obtain a copy of the License at
|
|
#
|
|
# http://www.apache.org/licenses/LICENSE-2.0
|
|
#
|
|
# Unless required by applicable law or agreed to in writing, software
|
|
# distributed under the License is distributed on an "AS IS" BASIS,
|
|
# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
|
|
# See the License for the specific language governing permissions and
|
|
# limitations under the License.
|
|
|
|
from twisted.internet import defer
|
|
|
|
from .background_updates import BackgroundUpdateStore
|
|
from synapse.api.errors import SynapseError
|
|
from synapse.storage.engines import PostgresEngine, Sqlite3Engine
|
|
|
|
import logging
|
|
import re
|
|
import ujson as json
|
|
|
|
|
|
logger = logging.getLogger(__name__)
|
|
|
|
|
|
class SearchStore(BackgroundUpdateStore):
|
|
|
|
EVENT_SEARCH_UPDATE_NAME = "event_search"
|
|
EVENT_SEARCH_ORDER_UPDATE_NAME = "event_search_order"
|
|
EVENT_SEARCH_USE_GIST_POSTGRES_NAME = "event_search_postgres_gist"
|
|
|
|
def __init__(self, db_conn, hs):
|
|
super(SearchStore, self).__init__(db_conn, hs)
|
|
self.register_background_update_handler(
|
|
self.EVENT_SEARCH_UPDATE_NAME, self._background_reindex_search
|
|
)
|
|
self.register_background_update_handler(
|
|
self.EVENT_SEARCH_ORDER_UPDATE_NAME,
|
|
self._background_reindex_search_order
|
|
)
|
|
self.register_background_update_handler(
|
|
self.EVENT_SEARCH_USE_GIST_POSTGRES_NAME,
|
|
self._background_reindex_gist_search
|
|
)
|
|
|
|
@defer.inlineCallbacks
|
|
def _background_reindex_search(self, progress, batch_size):
|
|
target_min_stream_id = progress["target_min_stream_id_inclusive"]
|
|
max_stream_id = progress["max_stream_id_exclusive"]
|
|
rows_inserted = progress.get("rows_inserted", 0)
|
|
|
|
INSERT_CLUMP_SIZE = 1000
|
|
TYPES = ["m.room.name", "m.room.message", "m.room.topic"]
|
|
|
|
def reindex_search_txn(txn):
|
|
sql = (
|
|
"SELECT stream_ordering, event_id, room_id, type, content FROM events"
|
|
" WHERE ? <= stream_ordering AND stream_ordering < ?"
|
|
" AND (%s)"
|
|
" ORDER BY stream_ordering DESC"
|
|
" LIMIT ?"
|
|
) % (" OR ".join("type = '%s'" % (t,) for t in TYPES),)
|
|
|
|
txn.execute(sql, (target_min_stream_id, max_stream_id, batch_size))
|
|
|
|
rows = self.cursor_to_dict(txn)
|
|
if not rows:
|
|
return 0
|
|
|
|
min_stream_id = rows[-1]["stream_ordering"]
|
|
|
|
event_search_rows = []
|
|
for row in rows:
|
|
try:
|
|
event_id = row["event_id"]
|
|
room_id = row["room_id"]
|
|
etype = row["type"]
|
|
try:
|
|
content = json.loads(row["content"])
|
|
except Exception:
|
|
continue
|
|
|
|
if etype == "m.room.message":
|
|
key = "content.body"
|
|
value = content["body"]
|
|
elif etype == "m.room.topic":
|
|
key = "content.topic"
|
|
value = content["topic"]
|
|
elif etype == "m.room.name":
|
|
key = "content.name"
|
|
value = content["name"]
|
|
except (KeyError, AttributeError):
|
|
# If the event is missing a necessary field then
|
|
# skip over it.
|
|
continue
|
|
|
|
if not isinstance(value, basestring):
|
|
# If the event body, name or topic isn't a string
|
|
# then skip over it
|
|
continue
|
|
|
|
event_search_rows.append((event_id, room_id, key, value))
|
|
|
|
if isinstance(self.database_engine, PostgresEngine):
|
|
txn.execute("SET work_mem='256kB'")
|
|
sql = (
|
|
"INSERT INTO event_search (event_id, room_id, key, vector)"
|
|
" VALUES (?,?,?,to_tsvector('english', ?))"
|
|
)
|
|
elif isinstance(self.database_engine, Sqlite3Engine):
|
|
sql = (
|
|
"INSERT INTO event_search (event_id, room_id, key, value)"
|
|
" VALUES (?,?,?,?)"
|
|
)
|
|
else:
|
|
# This should be unreachable.
|
|
raise Exception("Unrecognized database engine")
|
|
|
|
for index in range(0, len(event_search_rows), INSERT_CLUMP_SIZE):
|
|
clump = event_search_rows[index:index + INSERT_CLUMP_SIZE]
|
|
txn.executemany(sql, clump)
|
|
|
|
if isinstance(self.database_engine, PostgresEngine):
|
|
txn.execute("RESET work_mem")
|
|
|
|
progress = {
|
|
"target_min_stream_id_inclusive": target_min_stream_id,
|
|
"max_stream_id_exclusive": min_stream_id,
|
|
"rows_inserted": rows_inserted + len(event_search_rows)
|
|
}
|
|
|
|
self._background_update_progress_txn(
|
|
txn, self.EVENT_SEARCH_UPDATE_NAME, progress
|
|
)
|
|
|
|
return len(event_search_rows)
|
|
|
|
result = yield self.runInteraction(
|
|
self.EVENT_SEARCH_UPDATE_NAME, reindex_search_txn
|
|
)
|
|
|
|
if not result:
|
|
yield self._end_background_update(self.EVENT_SEARCH_UPDATE_NAME)
|
|
|
|
defer.returnValue(result)
|
|
|
|
@defer.inlineCallbacks
|
|
def _background_reindex_gist_search(self, progress, batch_size):
|
|
def create_index(conn):
|
|
conn.rollback()
|
|
conn.set_session(autocommit=True)
|
|
c = conn.cursor()
|
|
|
|
c.execute(
|
|
"CREATE INDEX CONCURRENTLY event_search_fts_idx_gist"
|
|
" ON event_search USING GIST (vector)"
|
|
)
|
|
|
|
c.execute("DROP INDEX event_search_fts_idx")
|
|
|
|
conn.set_session(autocommit=False)
|
|
|
|
if isinstance(self.database_engine, PostgresEngine):
|
|
yield self.runWithConnection(create_index)
|
|
|
|
yield self._end_background_update(self.EVENT_SEARCH_USE_GIST_POSTGRES_NAME)
|
|
defer.returnValue(1)
|
|
|
|
@defer.inlineCallbacks
|
|
def _background_reindex_search_order(self, progress, batch_size):
|
|
target_min_stream_id = progress["target_min_stream_id_inclusive"]
|
|
max_stream_id = progress["max_stream_id_exclusive"]
|
|
rows_inserted = progress.get("rows_inserted", 0)
|
|
have_added_index = progress['have_added_indexes']
|
|
|
|
if not have_added_index:
|
|
def create_index(conn):
|
|
conn.rollback()
|
|
conn.set_session(autocommit=True)
|
|
c = conn.cursor()
|
|
|
|
# We create with NULLS FIRST so that when we search *backwards*
|
|
# we get the ones with non null origin_server_ts *first*
|
|
c.execute(
|
|
"CREATE INDEX CONCURRENTLY event_search_room_order ON event_search("
|
|
"room_id, origin_server_ts NULLS FIRST, stream_ordering NULLS FIRST)"
|
|
)
|
|
c.execute(
|
|
"CREATE INDEX CONCURRENTLY event_search_order ON event_search("
|
|
"origin_server_ts NULLS FIRST, stream_ordering NULLS FIRST)"
|
|
)
|
|
conn.set_session(autocommit=False)
|
|
|
|
yield self.runWithConnection(create_index)
|
|
|
|
pg = dict(progress)
|
|
pg["have_added_indexes"] = True
|
|
|
|
yield self.runInteraction(
|
|
self.EVENT_SEARCH_ORDER_UPDATE_NAME,
|
|
self._background_update_progress_txn,
|
|
self.EVENT_SEARCH_ORDER_UPDATE_NAME, pg,
|
|
)
|
|
|
|
def reindex_search_txn(txn):
|
|
sql = (
|
|
"UPDATE event_search AS es SET stream_ordering = e.stream_ordering,"
|
|
" origin_server_ts = e.origin_server_ts"
|
|
" FROM events AS e"
|
|
" WHERE e.event_id = es.event_id"
|
|
" AND ? <= e.stream_ordering AND e.stream_ordering < ?"
|
|
" RETURNING es.stream_ordering"
|
|
)
|
|
|
|
min_stream_id = max_stream_id - batch_size
|
|
txn.execute(sql, (min_stream_id, max_stream_id))
|
|
rows = txn.fetchall()
|
|
|
|
if min_stream_id < target_min_stream_id:
|
|
# We've recached the end.
|
|
return len(rows), False
|
|
|
|
progress = {
|
|
"target_min_stream_id_inclusive": target_min_stream_id,
|
|
"max_stream_id_exclusive": min_stream_id,
|
|
"rows_inserted": rows_inserted + len(rows),
|
|
"have_added_indexes": True,
|
|
}
|
|
|
|
self._background_update_progress_txn(
|
|
txn, self.EVENT_SEARCH_ORDER_UPDATE_NAME, progress
|
|
)
|
|
|
|
return len(rows), True
|
|
|
|
num_rows, finished = yield self.runInteraction(
|
|
self.EVENT_SEARCH_ORDER_UPDATE_NAME, reindex_search_txn
|
|
)
|
|
|
|
if not finished:
|
|
yield self._end_background_update(self.EVENT_SEARCH_ORDER_UPDATE_NAME)
|
|
|
|
defer.returnValue(num_rows)
|
|
|
|
@defer.inlineCallbacks
|
|
def search_msgs(self, room_ids, search_term, keys):
|
|
"""Performs a full text search over events with given keys.
|
|
|
|
Args:
|
|
room_ids (list): List of room ids to search in
|
|
search_term (str): Search term to search for
|
|
keys (list): List of keys to search in, currently supports
|
|
"content.body", "content.name", "content.topic"
|
|
|
|
Returns:
|
|
list of dicts
|
|
"""
|
|
clauses = []
|
|
|
|
search_query = search_query = _parse_query(self.database_engine, search_term)
|
|
|
|
args = []
|
|
|
|
# Make sure we don't explode because the person is in too many rooms.
|
|
# We filter the results below regardless.
|
|
if len(room_ids) < 500:
|
|
clauses.append(
|
|
"room_id IN (%s)" % (",".join(["?"] * len(room_ids)),)
|
|
)
|
|
args.extend(room_ids)
|
|
|
|
local_clauses = []
|
|
for key in keys:
|
|
local_clauses.append("key = ?")
|
|
args.append(key)
|
|
|
|
clauses.append(
|
|
"(%s)" % (" OR ".join(local_clauses),)
|
|
)
|
|
|
|
count_args = args
|
|
count_clauses = clauses
|
|
|
|
if isinstance(self.database_engine, PostgresEngine):
|
|
sql = (
|
|
"SELECT ts_rank_cd(vector, to_tsquery('english', ?)) AS rank,"
|
|
" room_id, event_id"
|
|
" FROM event_search"
|
|
" WHERE vector @@ to_tsquery('english', ?)"
|
|
)
|
|
args = [search_query, search_query] + args
|
|
|
|
count_sql = (
|
|
"SELECT room_id, count(*) as count FROM event_search"
|
|
" WHERE vector @@ to_tsquery('english', ?)"
|
|
)
|
|
count_args = [search_query] + count_args
|
|
elif isinstance(self.database_engine, Sqlite3Engine):
|
|
sql = (
|
|
"SELECT rank(matchinfo(event_search)) as rank, room_id, event_id"
|
|
" FROM event_search"
|
|
" WHERE value MATCH ?"
|
|
)
|
|
args = [search_query] + args
|
|
|
|
count_sql = (
|
|
"SELECT room_id, count(*) as count FROM event_search"
|
|
" WHERE value MATCH ?"
|
|
)
|
|
count_args = [search_term] + count_args
|
|
else:
|
|
# This should be unreachable.
|
|
raise Exception("Unrecognized database engine")
|
|
|
|
for clause in clauses:
|
|
sql += " AND " + clause
|
|
|
|
for clause in count_clauses:
|
|
count_sql += " AND " + clause
|
|
|
|
# We add an arbitrary limit here to ensure we don't try to pull the
|
|
# entire table from the database.
|
|
sql += " ORDER BY rank DESC LIMIT 500"
|
|
|
|
results = yield self._execute(
|
|
"search_msgs", self.cursor_to_dict, sql, *args
|
|
)
|
|
|
|
results = filter(lambda row: row["room_id"] in room_ids, results)
|
|
|
|
events = yield self._get_events([r["event_id"] for r in results])
|
|
|
|
event_map = {
|
|
ev.event_id: ev
|
|
for ev in events
|
|
}
|
|
|
|
highlights = None
|
|
if isinstance(self.database_engine, PostgresEngine):
|
|
highlights = yield self._find_highlights_in_postgres(search_query, events)
|
|
|
|
count_sql += " GROUP BY room_id"
|
|
|
|
count_results = yield self._execute(
|
|
"search_rooms_count", self.cursor_to_dict, count_sql, *count_args
|
|
)
|
|
|
|
count = sum(row["count"] for row in count_results if row["room_id"] in room_ids)
|
|
|
|
defer.returnValue({
|
|
"results": [
|
|
{
|
|
"event": event_map[r["event_id"]],
|
|
"rank": r["rank"],
|
|
}
|
|
for r in results
|
|
if r["event_id"] in event_map
|
|
],
|
|
"highlights": highlights,
|
|
"count": count,
|
|
})
|
|
|
|
@defer.inlineCallbacks
|
|
def search_rooms(self, room_ids, search_term, keys, limit, pagination_token=None):
|
|
"""Performs a full text search over events with given keys.
|
|
|
|
Args:
|
|
room_id (list): The room_ids to search in
|
|
search_term (str): Search term to search for
|
|
keys (list): List of keys to search in, currently supports
|
|
"content.body", "content.name", "content.topic"
|
|
pagination_token (str): A pagination token previously returned
|
|
|
|
Returns:
|
|
list of dicts
|
|
"""
|
|
clauses = []
|
|
|
|
search_query = search_query = _parse_query(self.database_engine, search_term)
|
|
|
|
args = []
|
|
|
|
# Make sure we don't explode because the person is in too many rooms.
|
|
# We filter the results below regardless.
|
|
if len(room_ids) < 500:
|
|
clauses.append(
|
|
"room_id IN (%s)" % (",".join(["?"] * len(room_ids)),)
|
|
)
|
|
args.extend(room_ids)
|
|
|
|
local_clauses = []
|
|
for key in keys:
|
|
local_clauses.append("key = ?")
|
|
args.append(key)
|
|
|
|
clauses.append(
|
|
"(%s)" % (" OR ".join(local_clauses),)
|
|
)
|
|
|
|
# take copies of the current args and clauses lists, before adding
|
|
# pagination clauses to main query.
|
|
count_args = list(args)
|
|
count_clauses = list(clauses)
|
|
|
|
if pagination_token:
|
|
try:
|
|
origin_server_ts, stream = pagination_token.split(",")
|
|
origin_server_ts = int(origin_server_ts)
|
|
stream = int(stream)
|
|
except Exception:
|
|
raise SynapseError(400, "Invalid pagination token")
|
|
|
|
clauses.append(
|
|
"(origin_server_ts < ?"
|
|
" OR (origin_server_ts = ? AND stream_ordering < ?))"
|
|
)
|
|
args.extend([origin_server_ts, origin_server_ts, stream])
|
|
|
|
if isinstance(self.database_engine, PostgresEngine):
|
|
sql = (
|
|
"SELECT ts_rank_cd(vector, to_tsquery('english', ?)) as rank,"
|
|
" origin_server_ts, stream_ordering, room_id, event_id"
|
|
" FROM event_search"
|
|
" WHERE vector @@ to_tsquery('english', ?) AND "
|
|
)
|
|
args = [search_query, search_query] + args
|
|
|
|
count_sql = (
|
|
"SELECT room_id, count(*) as count FROM event_search"
|
|
" WHERE vector @@ to_tsquery('english', ?) AND "
|
|
)
|
|
count_args = [search_query] + count_args
|
|
elif isinstance(self.database_engine, Sqlite3Engine):
|
|
# We use CROSS JOIN here to ensure we use the right indexes.
|
|
# https://sqlite.org/optoverview.html#crossjoin
|
|
#
|
|
# We want to use the full text search index on event_search to
|
|
# extract all possible matches first, then lookup those matches
|
|
# in the events table to get the topological ordering. We need
|
|
# to use the indexes in this order because sqlite refuses to
|
|
# MATCH unless it uses the full text search index
|
|
sql = (
|
|
"SELECT rank(matchinfo) as rank, room_id, event_id,"
|
|
" origin_server_ts, stream_ordering"
|
|
" FROM (SELECT key, event_id, matchinfo(event_search) as matchinfo"
|
|
" FROM event_search"
|
|
" WHERE value MATCH ?"
|
|
" )"
|
|
" CROSS JOIN events USING (event_id)"
|
|
" WHERE "
|
|
)
|
|
args = [search_query] + args
|
|
|
|
count_sql = (
|
|
"SELECT room_id, count(*) as count FROM event_search"
|
|
" WHERE value MATCH ? AND "
|
|
)
|
|
count_args = [search_term] + count_args
|
|
else:
|
|
# This should be unreachable.
|
|
raise Exception("Unrecognized database engine")
|
|
|
|
sql += " AND ".join(clauses)
|
|
count_sql += " AND ".join(count_clauses)
|
|
|
|
# We add an arbitrary limit here to ensure we don't try to pull the
|
|
# entire table from the database.
|
|
if isinstance(self.database_engine, PostgresEngine):
|
|
sql += (
|
|
" ORDER BY origin_server_ts DESC NULLS LAST,"
|
|
" stream_ordering DESC NULLS LAST LIMIT ?"
|
|
)
|
|
elif isinstance(self.database_engine, Sqlite3Engine):
|
|
sql += " ORDER BY origin_server_ts DESC, stream_ordering DESC LIMIT ?"
|
|
else:
|
|
raise Exception("Unrecognized database engine")
|
|
|
|
args.append(limit)
|
|
|
|
results = yield self._execute(
|
|
"search_rooms", self.cursor_to_dict, sql, *args
|
|
)
|
|
|
|
results = filter(lambda row: row["room_id"] in room_ids, results)
|
|
|
|
events = yield self._get_events([r["event_id"] for r in results])
|
|
|
|
event_map = {
|
|
ev.event_id: ev
|
|
for ev in events
|
|
}
|
|
|
|
highlights = None
|
|
if isinstance(self.database_engine, PostgresEngine):
|
|
highlights = yield self._find_highlights_in_postgres(search_query, events)
|
|
|
|
count_sql += " GROUP BY room_id"
|
|
|
|
count_results = yield self._execute(
|
|
"search_rooms_count", self.cursor_to_dict, count_sql, *count_args
|
|
)
|
|
|
|
count = sum(row["count"] for row in count_results if row["room_id"] in room_ids)
|
|
|
|
defer.returnValue({
|
|
"results": [
|
|
{
|
|
"event": event_map[r["event_id"]],
|
|
"rank": r["rank"],
|
|
"pagination_token": "%s,%s" % (
|
|
r["origin_server_ts"], r["stream_ordering"]
|
|
),
|
|
}
|
|
for r in results
|
|
if r["event_id"] in event_map
|
|
],
|
|
"highlights": highlights,
|
|
"count": count,
|
|
})
|
|
|
|
def _find_highlights_in_postgres(self, search_query, events):
|
|
"""Given a list of events and a search term, return a list of words
|
|
that match from the content of the event.
|
|
|
|
This is used to give a list of words that clients can match against to
|
|
highlight the matching parts.
|
|
|
|
Args:
|
|
search_query (str)
|
|
events (list): A list of events
|
|
|
|
Returns:
|
|
deferred : A set of strings.
|
|
"""
|
|
def f(txn):
|
|
highlight_words = set()
|
|
for event in events:
|
|
# As a hack we simply join values of all possible keys. This is
|
|
# fine since we're only using them to find possible highlights.
|
|
values = []
|
|
for key in ("body", "name", "topic"):
|
|
v = event.content.get(key, None)
|
|
if v:
|
|
values.append(v)
|
|
|
|
if not values:
|
|
continue
|
|
|
|
value = " ".join(values)
|
|
|
|
# We need to find some values for StartSel and StopSel that
|
|
# aren't in the value so that we can pick results out.
|
|
start_sel = "<"
|
|
stop_sel = ">"
|
|
|
|
while start_sel in value:
|
|
start_sel += "<"
|
|
while stop_sel in value:
|
|
stop_sel += ">"
|
|
|
|
query = "SELECT ts_headline(?, to_tsquery('english', ?), %s)" % (
|
|
_to_postgres_options({
|
|
"StartSel": start_sel,
|
|
"StopSel": stop_sel,
|
|
"MaxFragments": "50",
|
|
})
|
|
)
|
|
txn.execute(query, (value, search_query,))
|
|
headline, = txn.fetchall()[0]
|
|
|
|
# Now we need to pick the possible highlights out of the haedline
|
|
# result.
|
|
matcher_regex = "%s(.*?)%s" % (
|
|
re.escape(start_sel),
|
|
re.escape(stop_sel),
|
|
)
|
|
|
|
res = re.findall(matcher_regex, headline)
|
|
highlight_words.update([r.lower() for r in res])
|
|
|
|
return highlight_words
|
|
|
|
return self.runInteraction("_find_highlights", f)
|
|
|
|
|
|
def _to_postgres_options(options_dict):
|
|
return "'%s'" % (
|
|
",".join("%s=%s" % (k, v) for k, v in options_dict.items()),
|
|
)
|
|
|
|
|
|
def _parse_query(database_engine, search_term):
|
|
"""Takes a plain unicode string from the user and converts it into a form
|
|
that can be passed to database.
|
|
We use this so that we can add prefix matching, which isn't something
|
|
that is supported by default.
|
|
"""
|
|
|
|
# Pull out the individual words, discarding any non-word characters.
|
|
results = re.findall(r"([\w\-]+)", search_term, re.UNICODE)
|
|
|
|
if isinstance(database_engine, PostgresEngine):
|
|
return " & ".join(result + ":*" for result in results)
|
|
elif isinstance(database_engine, Sqlite3Engine):
|
|
return " & ".join(result + "*" for result in results)
|
|
else:
|
|
# This should be unreachable.
|
|
raise Exception("Unrecognized database engine")
|