326 lines
14 KiB
Python
326 lines
14 KiB
Python
import asyncio
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import struct
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from binascii import hexlify, unhexlify
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from decimal import Decimal
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from operator import itemgetter
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from typing import Optional, List, Iterable
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from elasticsearch import AsyncElasticsearch, NotFoundError
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from elasticsearch.helpers import async_bulk
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from lbry.crypto.base58 import Base58
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from lbry.schema.result import Outputs
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from lbry.schema.tags import clean_tags
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from lbry.schema.url import URL
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from lbry.wallet.server.db.common import CLAIM_TYPES, STREAM_TYPES
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class SearchIndex:
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def __init__(self, index_prefix: str):
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self.client: Optional[AsyncElasticsearch] = None
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self.index = index_prefix + 'claims'
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async def start(self):
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self.client = AsyncElasticsearch()
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try:
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if await self.client.indices.exists(self.index):
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return
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await self.client.indices.create(
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self.index,
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{"settings":
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{"analysis":
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{"analyzer": {"porter": {"tokenizer": "whitespace", "filter": ["lowercase", "porter_stem" ]}}}
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}
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}
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)
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except Exception as e:
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raise
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def stop(self):
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asyncio.ensure_future(self.client.close())
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self.client = None
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def delete_index(self):
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return self.client.indices.delete(self.index)
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async def sync_queue(self, claim_queue):
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if claim_queue.empty():
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return
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to_delete, to_update = [], []
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while not claim_queue.empty():
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operation, doc = claim_queue.get_nowait()
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if operation == 'delete':
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to_delete.append(doc)
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else:
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to_update.append(doc)
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await self.delete(to_delete)
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await self.update(to_update)
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await self.client.indices.refresh(self.index)
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async def update(self, claims):
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if not claims:
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return
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actions = [extract_doc(claim, self.index) for claim in claims]
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await async_bulk(self.client, actions)
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async def delete(self, claim_ids):
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if not claim_ids:
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return
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actions = [{'_index': self.index, '_op_type': 'delete', '_id': claim_id} for claim_id in claim_ids]
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await async_bulk(self.client, actions)
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update = expand_query(channel_id__in=claim_ids)
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update['script'] = {
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"source": "ctx._source.signature_valid=false",
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"lang": "painless"
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}
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await self.client.update_by_query(self.index, body=update)
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async def session_query(self, query_name, function, kwargs):
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offset, total = kwargs.get('offset', 0) if isinstance(kwargs, dict) else 0, 0
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if query_name == 'resolve':
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response = await self.resolve(*kwargs)
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else:
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response, offset, total = await self.search(**kwargs)
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return Outputs.to_base64(response, await self._get_referenced_rows(response), offset, total)
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async def resolve(self, *urls):
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results = await asyncio.gather(*(self.resolve_url(url) for url in urls))
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return results
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async def search(self, **kwargs):
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if 'channel' in kwargs:
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result = await self.resolve_url(kwargs.pop('channel'))
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if not result or not isinstance(result, Iterable):
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return [], 0, 0
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kwargs['channel_id'] = result['_id']
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try:
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result = await self.client.search(expand_query(**kwargs), self.index)
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except NotFoundError:
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# index has no docs, fixme: log something
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return [], 0, 0
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return expand_result(result['hits']['hits']), 0, result['hits']['total']['value']
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async def resolve_url(self, raw_url):
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try:
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url = URL.parse(raw_url)
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except ValueError as e:
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return e
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channel = None
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if url.has_channel:
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query = url.channel.to_dict()
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if set(query) == {'name'}:
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query['is_controlling'] = True
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else:
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query['order_by'] = ['^creation_height']
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matches, _, _ = await self.search(**query, limit=1)
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if matches:
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channel = matches[0]
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else:
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return LookupError(f'Could not find channel in "{raw_url}".')
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if url.has_stream:
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query = url.stream.to_dict()
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if channel is not None:
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if set(query) == {'name'}:
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# temporarily emulate is_controlling for claims in channel
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query['order_by'] = ['effective_amount', '^height']
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else:
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query['order_by'] = ['^channel_join']
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query['channel_hash'] = channel['claim_hash']
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query['signature_valid'] = True
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elif set(query) == {'name'}:
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query['is_controlling'] = True
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matches, _, _ = await self.search(**query, limit=1)
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if matches:
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return matches[0]
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else:
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return LookupError(f'Could not find claim at "{raw_url}".')
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return channel
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async def _get_referenced_rows(self, txo_rows: List[dict]):
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txo_rows = [row for row in txo_rows if isinstance(row, dict)]
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repost_hashes = set(filter(None, map(itemgetter('reposted_claim_hash'), txo_rows)))
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channel_hashes = set(filter(None, (row['channel_hash'] for row in txo_rows)))
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reposted_txos = []
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if repost_hashes:
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reposted_txos, _, _ = await self.search(**{'claim.claim_hash__in': repost_hashes})
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channel_hashes |= set(filter(None, (row['channel_hash'] for row in reposted_txos)))
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channel_txos = []
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if channel_hashes:
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channel_txos, _, _ = await self.search(**{'claim.claim_hash__in': channel_hashes})
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# channels must come first for client side inflation to work properly
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return channel_txos + reposted_txos
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def extract_doc(doc, index):
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doc['claim_id'] = hexlify(doc.pop('claim_hash')[::-1]).decode()
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if doc['reposted_claim_hash'] is not None:
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doc['reposted_claim_id'] = hexlify(doc.pop('reposted_claim_hash')[::-1]).decode()
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else:
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doc['reposted_claim_id'] = None
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channel_hash = doc.pop('channel_hash')
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doc['channel_id'] = hexlify(channel_hash[::-1]).decode() if channel_hash else channel_hash
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txo_hash = doc.pop('txo_hash')
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doc['tx_id'] = hexlify(txo_hash[:32][::-1]).decode()
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doc['tx_nout'] = struct.unpack('<I', txo_hash[32:])[0]
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doc['is_controlling'] = bool(doc['is_controlling'])
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doc['signature'] = hexlify(doc.pop('signature') or b'').decode() or None
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doc['signature_digest'] = hexlify(doc.pop('signature_digest') or b'').decode() or None
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doc['public_key_bytes'] = hexlify(doc.pop('public_key_bytes') or b'').decode() or None
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doc['public_key_hash'] = hexlify(doc.pop('public_key_hash') or b'').decode() or None
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doc['signature_valid'] = bool(doc['signature_valid'])
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doc['claim_type'] = doc.get('claim_type', 0) or 0
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doc['stream_type'] = int(doc.get('stream_type', 0) or 0)
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return {'doc': doc, '_id': doc['claim_id'], '_index': index, '_op_type': 'update',
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'doc_as_upsert': True}
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FIELDS = ['is_controlling', 'last_take_over_height', 'claim_id', 'claim_name', 'normalized', 'tx_position', 'amount',
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'timestamp', 'creation_timestamp', 'height', 'creation_height', 'activation_height', 'expiration_height',
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'release_time', 'short_url', 'canonical_url', 'title', 'author', 'description', 'claim_type', 'reposted',
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'stream_type', 'media_type', 'fee_amount', 'fee_currency', 'duration', 'reposted_claim_hash',
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'claims_in_channel', 'channel_join', 'signature_valid', 'effective_amount', 'support_amount',
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'trending_group', 'trending_mixed', 'trending_local', 'trending_global', 'channel_id', 'tx_id', 'tx_nout',
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'signature', 'signature_digest', 'public_key_bytes', 'public_key_hash', 'public_key_id', '_id', 'tags']
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TEXT_FIELDS = ['author', 'canonical_url', 'channel_id', 'claim_id', 'claim_name', 'description',
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'media_type', 'normalized', 'public_key_bytes', 'public_key_hash', 'short_url', 'signature',
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'signature_digest', 'stream_type', 'title', 'tx_id', 'fee_currency']
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RANGE_FIELDS = ['height', 'fee_amount', 'duration']
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REPLACEMENTS = {
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'name': 'claim_name',
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'txid': 'tx_id',
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'claim_hash': '_id',
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}
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def expand_query(**kwargs):
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query = {'must': [], 'must_not': []}
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collapse = None
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for key, value in kwargs.items():
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key = key.replace('claim.', '')
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many = key.endswith('__in')
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if many:
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key = key.replace('__in', '')
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key = REPLACEMENTS.get(key, key)
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if key in FIELDS:
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if key == 'claim_type':
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if isinstance(value, str):
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value = CLAIM_TYPES[value]
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else:
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value = [CLAIM_TYPES[claim_type] for claim_type in value]
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if key == '_id':
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if isinstance(value, Iterable):
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value = [hexlify(item[::-1]).decode() for item in value]
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else:
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value = hexlify(value[::-1]).decode()
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if key == 'public_key_id':
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key = 'public_key_hash'
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value = hexlify(Base58.decode(value)[1:21]).decode()
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if key == 'signature_valid':
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continue # handled later
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if key in TEXT_FIELDS:
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key += '.keyword'
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ops = {'<=': 'lte', '>=': 'gte', '<': 'lt', '>': 'gt'}
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if key in RANGE_FIELDS and isinstance(value, str) and value[0] in ops:
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operator_length = 2 if value[:2] in ops else 1
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operator, value = value[:operator_length], value[operator_length:]
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if key == 'fee_amount':
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value = Decimal(value)*1000
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query['must'].append({"range": {key: {ops[operator]: value}}})
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elif many:
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query['must'].append({"terms": {key: value}})
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else:
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if key == 'fee_amount':
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value = Decimal(value)*1000
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query['must'].append({"term": {key: {"value": value}}})
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elif key == 'not_channel_ids':
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for channel_id in value:
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query['must_not'].append({"term": {'channel_id.keyword': channel_id}})
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query['must_not'].append({"term": {'_id': channel_id}})
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elif key == 'channel_ids':
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query['must'].append({"terms": {'channel_id.keyword': value}})
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elif key == 'media_types':
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query['must'].append({"terms": {'media_type.keyword': value}})
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elif key == 'stream_types':
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query['must'].append({"terms": {'stream_type': [STREAM_TYPES[stype] for stype in value]}})
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elif key == 'any_languages':
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query['must'].append({"terms": {'languages': clean_tags(value)}})
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elif key == 'any_languages':
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query['must'].append({"terms": {'languages': value}})
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elif key == 'all_languages':
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query['must'].extend([{"term": {'languages': tag}} for tag in value])
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elif key == 'any_tags':
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query['must'].append({"terms": {'tags': clean_tags(value)}})
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elif key == 'all_tags':
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query['must'].extend([{"term": {'tags': tag}} for tag in clean_tags(value)])
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elif key == 'not_tags':
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query['must_not'].extend([{"term": {'tags': tag}} for tag in clean_tags(value)])
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elif key == 'limit_claims_per_channel':
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collapse = ('channel_id.keyword', value)
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if kwargs.get('has_channel_signature'):
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query['must'].append({"exists": {"field": "signature_digest"}})
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if 'signature_valid' in kwargs:
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query['must'].append({"term": {"signature_valid": bool(kwargs["signature_valid"])}})
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elif 'signature_valid' in kwargs:
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query.setdefault('should', [])
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query["minimum_should_match"] = 1
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query['should'].append({"bool": {"must_not": {"exists": {"field": "signature_digest"}}}})
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query['should'].append({"term": {"signature_valid": bool(kwargs["signature_valid"])}})
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if 'text' in kwargs:
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return {"query":
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{"query_string":
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{"query": kwargs["text"], "fields": [
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"claim_name", "channel_name", "title", "description", "author", "tags"
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], "analyzer": "porter"}}}
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query = {
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'query': {'bool': query},
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"sort": [],
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}
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if "limit" in kwargs:
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query["size"] = kwargs["limit"]
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if 'offset' in kwargs:
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query["from"] = kwargs["offset"]
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if 'order_by' in kwargs:
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for value in kwargs['order_by']:
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is_asc = value.startswith('^')
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value = value[1:] if is_asc else value
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value = REPLACEMENTS.get(value, value)
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if value in TEXT_FIELDS:
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value += '.keyword'
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query['sort'].append({value: "asc" if is_asc else "desc"})
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if collapse:
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query["collapse"] = {
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"field": collapse[0],
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"inner_hits": {
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"name": collapse[0],
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"size": collapse[1],
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"sort": query["sort"]
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}
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}
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return query
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def expand_result(results):
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inner_hits = []
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for result in results:
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if result.get("inner_hits"):
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for _, inner_hit in result["inner_hits"].items():
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inner_hits.extend(inner_hit["hits"]["hits"])
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continue
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result.update(result.pop('_source'))
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result['claim_hash'] = unhexlify(result['claim_id'])[::-1]
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if result['reposted_claim_id']:
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result['reposted_claim_hash'] = unhexlify(result['reposted_claim_id'])[::-1]
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else:
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result['reposted_claim_hash'] = None
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result['channel_hash'] = unhexlify(result['channel_id'])[::-1] if result['channel_id'] else None
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result['txo_hash'] = unhexlify(result['tx_id'])[::-1] + struct.pack('<I', result['tx_nout'])
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if inner_hits:
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return expand_result(inner_hits)
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return results
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