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from abc import ABC, abstractmethod
from haystack.nodes import BM25Retriever, FARMReader
from haystack.document_stores import ElasticsearchDocumentStore
from haystack.pipelines import ExtractiveQAPipeline
import certifi
import datetime
import requests
from base64 import b64encode
ca_certs=certifi.where()
class DocumentQueries(ABC):
@abstractmethod
def search_by_query(self, query : str, retriever_top_k: int, reader_top_k: int, es_index: str):
pass
class ExtractiveProposalQueries(DocumentQueries):
def __init__(self, es_host: str, es_index: str, es_user, es_password, reader_name_or_path: str, use_gpu = True) -> None:
reader = FARMReader(model_name_or_path = reader_name_or_path, use_gpu = use_gpu, num_processes=1, context_window_size=200)
self._initialize_pipeline(es_host, es_index, es_user, es_password, reader = reader)
self.log = Log(es_host= es_host, es_index="log", es_user = es_user, es_password= es_password)
def _initialize_pipeline(self, es_host, es_index, es_user, es_password, reader = None):
if reader is not None:
self.reader = reader
self.es_host = es_host
self.es_user = es_user
self.es_password = es_password
self.document_store = ElasticsearchDocumentStore(host = es_host, username=es_user, password=es_password, index = es_index, port = 443, scheme='https', verify_certs=True, ca_certs=ca_certs, create_index=False)
self.retriever = BM25Retriever(document_store = self.document_store)
self.pipe = ExtractiveQAPipeline(self.reader, self.retriever)
def search_by_query(self, query : str, retriever_top_k: int, reader_top_k: int, es_index: str = None) :
self.log.write_log(query, "hfspace-informecomision")
#if es_index is not None:
#self._initialize_pipeline(self.es_host, es_index, self.es_user, self.es_password)
params = {"Retriever": {"top_k": retriever_top_k}, "Reader": {"top_k": reader_top_k}}
prediction = self.pipe.run( query = query, params = params)
return prediction["answers"]
class Log():
def __init__(self, es_host: str, es_index: str, es_user, es_password) -> None:
self.elastic_endpoint = f"https://{es_host}:443/{es_index}/_doc"
self.credentials = b64encode(b"3pvrzh9tl:4yl4vk9ijr").decode("ascii")
self.auth_header = { 'Authorization' : 'Basic %s' % self.credentials }
def write_log(self, message: str, source: str) -> None:
created_date = datetime.datetime.now().strftime('%Y-%m-%dT%H:%M:%SZ')
post_data = {
"message" : message,
"createdDate": {
"date" : created_date
},
"source": source
}
r = requests.post(self.elastic_endpoint, json = post_data, headers = self.auth_header)
print(r.text) |