forked from open-webui/open-webui
797 lines
23 KiB
Python
797 lines
23 KiB
Python
from fastapi import (
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FastAPI,
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Depends,
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HTTPException,
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status,
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UploadFile,
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File,
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Form,
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)
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from fastapi.middleware.cors import CORSMiddleware
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import os, shutil, logging, re
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from pathlib import Path
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from typing import List
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from chromadb.utils.batch_utils import create_batches
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from langchain_community.document_loaders import (
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WebBaseLoader,
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TextLoader,
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PyPDFLoader,
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CSVLoader,
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BSHTMLLoader,
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Docx2txtLoader,
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UnstructuredEPubLoader,
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UnstructuredWordDocumentLoader,
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UnstructuredMarkdownLoader,
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UnstructuredXMLLoader,
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UnstructuredRSTLoader,
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UnstructuredExcelLoader,
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)
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from langchain.text_splitter import RecursiveCharacterTextSplitter
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from pydantic import BaseModel
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from typing import Optional
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import mimetypes
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import uuid
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import json
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import sentence_transformers
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from apps.web.models.documents import (
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Documents,
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DocumentForm,
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DocumentResponse,
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)
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from apps.rag.utils import (
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get_model_path,
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query_embeddings_doc,
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get_embeddings_function,
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query_embeddings_collection,
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)
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from utils.misc import (
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calculate_sha256,
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calculate_sha256_string,
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sanitize_filename,
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extract_folders_after_data_docs,
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)
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from utils.utils import get_current_user, get_admin_user
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from config import (
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SRC_LOG_LEVELS,
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UPLOAD_DIR,
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DOCS_DIR,
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RAG_TOP_K,
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RAG_RELEVANCE_THRESHOLD,
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RAG_EMBEDDING_ENGINE,
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RAG_EMBEDDING_MODEL,
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RAG_EMBEDDING_MODEL_AUTO_UPDATE,
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RAG_EMBEDDING_MODEL_TRUST_REMOTE_CODE,
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ENABLE_RAG_HYBRID_SEARCH,
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RAG_RERANKING_MODEL,
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RAG_RERANKING_MODEL_AUTO_UPDATE,
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RAG_RERANKING_MODEL_TRUST_REMOTE_CODE,
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RAG_OPENAI_API_BASE_URL,
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RAG_OPENAI_API_KEY,
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DEVICE_TYPE,
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CHROMA_CLIENT,
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CHUNK_SIZE,
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CHUNK_OVERLAP,
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RAG_TEMPLATE,
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)
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from constants import ERROR_MESSAGES
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log = logging.getLogger(__name__)
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log.setLevel(SRC_LOG_LEVELS["RAG"])
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app = FastAPI()
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app.state.TOP_K = RAG_TOP_K
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app.state.RELEVANCE_THRESHOLD = RAG_RELEVANCE_THRESHOLD
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app.state.ENABLE_RAG_HYBRID_SEARCH = ENABLE_RAG_HYBRID_SEARCH
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app.state.CHUNK_SIZE = CHUNK_SIZE
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app.state.CHUNK_OVERLAP = CHUNK_OVERLAP
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app.state.RAG_EMBEDDING_ENGINE = RAG_EMBEDDING_ENGINE
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app.state.RAG_EMBEDDING_MODEL = RAG_EMBEDDING_MODEL
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app.state.RAG_RERANKING_MODEL = RAG_RERANKING_MODEL
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app.state.RAG_TEMPLATE = RAG_TEMPLATE
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app.state.OPENAI_API_BASE_URL = RAG_OPENAI_API_BASE_URL
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app.state.OPENAI_API_KEY = RAG_OPENAI_API_KEY
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app.state.PDF_EXTRACT_IMAGES = False
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def update_embedding_model(
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embedding_model: str,
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update_model: bool = False,
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):
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if embedding_model and app.state.RAG_EMBEDDING_ENGINE == "":
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app.state.sentence_transformer_ef = sentence_transformers.SentenceTransformer(
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get_model_path(embedding_model, update_model),
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device=DEVICE_TYPE,
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trust_remote_code=RAG_EMBEDDING_MODEL_TRUST_REMOTE_CODE,
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)
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else:
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app.state.sentence_transformer_ef = None
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def update_reranking_model(
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reranking_model: str,
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update_model: bool = False,
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):
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if reranking_model:
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app.state.sentence_transformer_rf = sentence_transformers.CrossEncoder(
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get_model_path(reranking_model, update_model),
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device=DEVICE_TYPE,
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trust_remote_code=RAG_RERANKING_MODEL_TRUST_REMOTE_CODE,
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)
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else:
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app.state.sentence_transformer_rf = None
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update_embedding_model(
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app.state.RAG_EMBEDDING_MODEL,
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RAG_EMBEDDING_MODEL_AUTO_UPDATE,
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)
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update_reranking_model(
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app.state.RAG_RERANKING_MODEL,
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RAG_RERANKING_MODEL_AUTO_UPDATE,
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)
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origins = ["*"]
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app.add_middleware(
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CORSMiddleware,
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allow_origins=origins,
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allow_credentials=True,
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allow_methods=["*"],
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allow_headers=["*"],
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)
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class CollectionNameForm(BaseModel):
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collection_name: Optional[str] = "test"
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class StoreWebForm(CollectionNameForm):
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url: str
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@app.get("/")
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async def get_status():
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return {
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"status": True,
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"chunk_size": app.state.CHUNK_SIZE,
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"chunk_overlap": app.state.CHUNK_OVERLAP,
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"template": app.state.RAG_TEMPLATE,
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"embedding_engine": app.state.RAG_EMBEDDING_ENGINE,
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"embedding_model": app.state.RAG_EMBEDDING_MODEL,
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"reranking_model": app.state.RAG_RERANKING_MODEL,
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}
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@app.get("/embedding")
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async def get_embedding_config(user=Depends(get_admin_user)):
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return {
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"status": True,
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"embedding_engine": app.state.RAG_EMBEDDING_ENGINE,
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"embedding_model": app.state.RAG_EMBEDDING_MODEL,
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"openai_config": {
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"url": app.state.OPENAI_API_BASE_URL,
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"key": app.state.OPENAI_API_KEY,
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},
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}
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@app.get("/reranking")
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async def get_reraanking_config(user=Depends(get_admin_user)):
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return {"status": True, "reranking_model": app.state.RAG_RERANKING_MODEL}
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class OpenAIConfigForm(BaseModel):
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url: str
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key: str
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class EmbeddingModelUpdateForm(BaseModel):
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openai_config: Optional[OpenAIConfigForm] = None
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embedding_engine: str
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embedding_model: str
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@app.post("/embedding/update")
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async def update_embedding_config(
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form_data: EmbeddingModelUpdateForm, user=Depends(get_admin_user)
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):
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log.info(
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f"Updating embedding model: {app.state.RAG_EMBEDDING_MODEL} to {form_data.embedding_model}"
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)
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try:
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app.state.RAG_EMBEDDING_ENGINE = form_data.embedding_engine
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app.state.RAG_EMBEDDING_MODEL = form_data.embedding_model
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if app.state.RAG_EMBEDDING_ENGINE in ["ollama", "openai"]:
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if form_data.openai_config != None:
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app.state.OPENAI_API_BASE_URL = form_data.openai_config.url
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app.state.OPENAI_API_KEY = form_data.openai_config.key
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update_embedding_model(app.state.RAG_EMBEDDING_MODEL, True)
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return {
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"status": True,
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"embedding_engine": app.state.RAG_EMBEDDING_ENGINE,
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"embedding_model": app.state.RAG_EMBEDDING_MODEL,
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"openai_config": {
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"url": app.state.OPENAI_API_BASE_URL,
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"key": app.state.OPENAI_API_KEY,
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},
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}
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except Exception as e:
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log.exception(f"Problem updating embedding model: {e}")
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raise HTTPException(
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status_code=status.HTTP_500_INTERNAL_SERVER_ERROR,
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detail=ERROR_MESSAGES.DEFAULT(e),
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)
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class RerankingModelUpdateForm(BaseModel):
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reranking_model: str
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@app.post("/reranking/update")
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async def update_reranking_config(
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form_data: RerankingModelUpdateForm, user=Depends(get_admin_user)
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):
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log.info(
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f"Updating reranking model: {app.state.RAG_RERANKING_MODEL} to {form_data.reranking_model}"
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)
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try:
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app.state.RAG_RERANKING_MODEL = form_data.reranking_model
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update_reranking_model(app.state.RAG_RERANKING_MODEL, True)
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return {
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"status": True,
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"reranking_model": app.state.RAG_RERANKING_MODEL,
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}
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except Exception as e:
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log.exception(f"Problem updating reranking model: {e}")
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raise HTTPException(
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status_code=status.HTTP_500_INTERNAL_SERVER_ERROR,
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detail=ERROR_MESSAGES.DEFAULT(e),
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)
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@app.get("/config")
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async def get_rag_config(user=Depends(get_admin_user)):
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return {
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"status": True,
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"pdf_extract_images": app.state.PDF_EXTRACT_IMAGES,
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"chunk": {
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"chunk_size": app.state.CHUNK_SIZE,
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"chunk_overlap": app.state.CHUNK_OVERLAP,
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},
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}
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class ChunkParamUpdateForm(BaseModel):
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chunk_size: int
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chunk_overlap: int
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class ConfigUpdateForm(BaseModel):
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pdf_extract_images: bool
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chunk: ChunkParamUpdateForm
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@app.post("/config/update")
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async def update_rag_config(form_data: ConfigUpdateForm, user=Depends(get_admin_user)):
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app.state.PDF_EXTRACT_IMAGES = form_data.pdf_extract_images
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app.state.CHUNK_SIZE = form_data.chunk.chunk_size
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app.state.CHUNK_OVERLAP = form_data.chunk.chunk_overlap
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return {
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"status": True,
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"pdf_extract_images": app.state.PDF_EXTRACT_IMAGES,
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"chunk": {
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"chunk_size": app.state.CHUNK_SIZE,
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"chunk_overlap": app.state.CHUNK_OVERLAP,
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},
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}
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@app.get("/template")
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async def get_rag_template(user=Depends(get_current_user)):
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return {
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"status": True,
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"template": app.state.RAG_TEMPLATE,
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}
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@app.get("/query/settings")
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async def get_query_settings(user=Depends(get_admin_user)):
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return {
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"status": True,
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"template": app.state.RAG_TEMPLATE,
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"k": app.state.TOP_K,
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"r": app.state.RELEVANCE_THRESHOLD,
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"hybrid": app.state.ENABLE_RAG_HYBRID_SEARCH,
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}
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class QuerySettingsForm(BaseModel):
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k: Optional[int] = None
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r: Optional[float] = None
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template: Optional[str] = None
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hybrid: Optional[bool] = None
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@app.post("/query/settings/update")
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async def update_query_settings(
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form_data: QuerySettingsForm, user=Depends(get_admin_user)
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):
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app.state.RAG_TEMPLATE = form_data.template if form_data.template else RAG_TEMPLATE
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app.state.TOP_K = form_data.k if form_data.k else 4
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app.state.RELEVANCE_THRESHOLD = form_data.r if form_data.r else 0.0
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app.state.ENABLE_RAG_HYBRID_SEARCH = form_data.hybrid if form_data.hybrid else False
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return {
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"status": True,
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"template": app.state.RAG_TEMPLATE,
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"k": app.state.TOP_K,
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"r": app.state.RELEVANCE_THRESHOLD,
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"hybrid": app.state.ENABLE_RAG_HYBRID_SEARCH,
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}
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class QueryDocForm(BaseModel):
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collection_name: str
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query: str
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k: Optional[int] = None
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r: Optional[float] = None
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hybrid: Optional[bool] = None
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@app.post("/query/doc")
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def query_doc_handler(
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form_data: QueryDocForm,
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user=Depends(get_current_user),
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):
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try:
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embeddings_function = get_embeddings_function(
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app.state.RAG_EMBEDDING_ENGINE,
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app.state.RAG_EMBEDDING_MODEL,
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app.state.sentence_transformer_ef,
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app.state.OPENAI_API_KEY,
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app.state.OPENAI_API_BASE_URL,
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)
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return query_embeddings_doc(
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collection_name=form_data.collection_name,
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query=form_data.query,
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k=form_data.k if form_data.k else app.state.TOP_K,
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r=form_data.r if form_data.r else app.state.RELEVANCE_THRESHOLD,
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embeddings_function=embeddings_function,
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reranking_function=app.state.sentence_transformer_rf,
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hybrid_search=(
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form_data.hybrid
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if form_data.hybrid
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else app.state.ENABLE_RAG_HYBRID_SEARCH
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),
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)
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except Exception as e:
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log.exception(e)
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raise HTTPException(
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status_code=status.HTTP_400_BAD_REQUEST,
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detail=ERROR_MESSAGES.DEFAULT(e),
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)
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class QueryCollectionsForm(BaseModel):
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collection_names: List[str]
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query: str
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k: Optional[int] = None
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r: Optional[float] = None
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hybrid: Optional[bool] = None
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@app.post("/query/collection")
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def query_collection_handler(
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form_data: QueryCollectionsForm,
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user=Depends(get_current_user),
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):
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try:
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embeddings_function = get_embeddings_function(
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app.state.RAG_EMBEDDING_ENGINE,
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app.state.RAG_EMBEDDING_MODEL,
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app.state.sentence_transformer_ef,
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app.state.OPENAI_API_KEY,
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app.state.OPENAI_API_BASE_URL,
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)
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return query_embeddings_collection(
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collection_names=form_data.collection_names,
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query=form_data.query,
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k=form_data.k if form_data.k else app.state.TOP_K,
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r=form_data.r if form_data.r else app.state.RELEVANCE_THRESHOLD,
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embeddings_function=embeddings_function,
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reranking_function=app.state.sentence_transformer_rf,
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hybrid_search=(
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form_data.hybrid
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if form_data.hybrid
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else app.state.ENABLE_RAG_HYBRID_SEARCH
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),
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)
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except Exception as e:
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log.exception(e)
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raise HTTPException(
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status_code=status.HTTP_400_BAD_REQUEST,
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detail=ERROR_MESSAGES.DEFAULT(e),
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)
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@app.post("/web")
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def store_web(form_data: StoreWebForm, user=Depends(get_current_user)):
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# "https://www.gutenberg.org/files/1727/1727-h/1727-h.htm"
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try:
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loader = WebBaseLoader(form_data.url)
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data = loader.load()
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collection_name = form_data.collection_name
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if collection_name == "":
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collection_name = calculate_sha256_string(form_data.url)[:63]
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store_data_in_vector_db(data, collection_name, overwrite=True)
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return {
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"status": True,
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"collection_name": collection_name,
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"filename": form_data.url,
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}
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except Exception as e:
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log.exception(e)
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raise HTTPException(
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status_code=status.HTTP_400_BAD_REQUEST,
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detail=ERROR_MESSAGES.DEFAULT(e),
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)
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def store_data_in_vector_db(data, collection_name, overwrite: bool = False) -> bool:
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text_splitter = RecursiveCharacterTextSplitter(
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chunk_size=app.state.CHUNK_SIZE,
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chunk_overlap=app.state.CHUNK_OVERLAP,
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add_start_index=True,
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)
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docs = text_splitter.split_documents(data)
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if len(docs) > 0:
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log.info(f"store_data_in_vector_db {docs}")
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return store_docs_in_vector_db(docs, collection_name, overwrite), None
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else:
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raise ValueError(ERROR_MESSAGES.EMPTY_CONTENT)
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def store_text_in_vector_db(
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text, metadata, collection_name, overwrite: bool = False
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) -> bool:
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text_splitter = RecursiveCharacterTextSplitter(
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chunk_size=app.state.CHUNK_SIZE,
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chunk_overlap=app.state.CHUNK_OVERLAP,
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add_start_index=True,
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)
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docs = text_splitter.create_documents([text], metadatas=[metadata])
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return store_docs_in_vector_db(docs, collection_name, overwrite)
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def store_docs_in_vector_db(docs, collection_name, overwrite: bool = False) -> bool:
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log.info(f"store_docs_in_vector_db {docs} {collection_name}")
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texts = [doc.page_content for doc in docs]
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metadatas = [doc.metadata for doc in docs]
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try:
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if overwrite:
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for collection in CHROMA_CLIENT.list_collections():
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if collection_name == collection.name:
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log.info(f"deleting existing collection {collection_name}")
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CHROMA_CLIENT.delete_collection(name=collection_name)
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collection = CHROMA_CLIENT.create_collection(name=collection_name)
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embedding_func = get_embeddings_function(
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app.state.RAG_EMBEDDING_ENGINE,
|
|
app.state.RAG_EMBEDDING_MODEL,
|
|
app.state.sentence_transformer_ef,
|
|
app.state.OPENAI_API_KEY,
|
|
app.state.OPENAI_API_BASE_URL,
|
|
)
|
|
|
|
embedding_texts = list(map(lambda x: x.replace("\n", " "), texts))
|
|
embeddings = embedding_func(embedding_texts)
|
|
|
|
for batch in create_batches(
|
|
api=CHROMA_CLIENT,
|
|
ids=[str(uuid.uuid1()) for _ in texts],
|
|
metadatas=metadatas,
|
|
embeddings=embeddings,
|
|
documents=texts,
|
|
):
|
|
collection.add(*batch)
|
|
|
|
return True
|
|
except Exception as e:
|
|
log.exception(e)
|
|
if e.__class__.__name__ == "UniqueConstraintError":
|
|
return True
|
|
|
|
return False
|
|
|
|
|
|
def get_loader(filename: str, file_content_type: str, file_path: str):
|
|
file_ext = filename.split(".")[-1].lower()
|
|
known_type = True
|
|
|
|
known_source_ext = [
|
|
"go",
|
|
"py",
|
|
"java",
|
|
"sh",
|
|
"bat",
|
|
"ps1",
|
|
"cmd",
|
|
"js",
|
|
"ts",
|
|
"css",
|
|
"cpp",
|
|
"hpp",
|
|
"h",
|
|
"c",
|
|
"cs",
|
|
"sql",
|
|
"log",
|
|
"ini",
|
|
"pl",
|
|
"pm",
|
|
"r",
|
|
"dart",
|
|
"dockerfile",
|
|
"env",
|
|
"php",
|
|
"hs",
|
|
"hsc",
|
|
"lua",
|
|
"nginxconf",
|
|
"conf",
|
|
"m",
|
|
"mm",
|
|
"plsql",
|
|
"perl",
|
|
"rb",
|
|
"rs",
|
|
"db2",
|
|
"scala",
|
|
"bash",
|
|
"swift",
|
|
"vue",
|
|
"svelte",
|
|
]
|
|
|
|
if file_ext == "pdf":
|
|
loader = PyPDFLoader(file_path, extract_images=app.state.PDF_EXTRACT_IMAGES)
|
|
elif file_ext == "csv":
|
|
loader = CSVLoader(file_path)
|
|
elif file_ext == "rst":
|
|
loader = UnstructuredRSTLoader(file_path, mode="elements")
|
|
elif file_ext == "xml":
|
|
loader = UnstructuredXMLLoader(file_path)
|
|
elif file_ext in ["htm", "html"]:
|
|
loader = BSHTMLLoader(file_path, open_encoding="unicode_escape")
|
|
elif file_ext == "md":
|
|
loader = UnstructuredMarkdownLoader(file_path)
|
|
elif file_content_type == "application/epub+zip":
|
|
loader = UnstructuredEPubLoader(file_path)
|
|
elif (
|
|
file_content_type
|
|
== "application/vnd.openxmlformats-officedocument.wordprocessingml.document"
|
|
or file_ext in ["doc", "docx"]
|
|
):
|
|
loader = Docx2txtLoader(file_path)
|
|
elif file_content_type in [
|
|
"application/vnd.ms-excel",
|
|
"application/vnd.openxmlformats-officedocument.spreadsheetml.sheet",
|
|
] or file_ext in ["xls", "xlsx"]:
|
|
loader = UnstructuredExcelLoader(file_path)
|
|
elif file_ext in known_source_ext or (
|
|
file_content_type and file_content_type.find("text/") >= 0
|
|
):
|
|
loader = TextLoader(file_path, autodetect_encoding=True)
|
|
else:
|
|
loader = TextLoader(file_path, autodetect_encoding=True)
|
|
known_type = False
|
|
|
|
return loader, known_type
|
|
|
|
|
|
@app.post("/doc")
|
|
def store_doc(
|
|
collection_name: Optional[str] = Form(None),
|
|
file: UploadFile = File(...),
|
|
user=Depends(get_current_user),
|
|
):
|
|
# "https://www.gutenberg.org/files/1727/1727-h/1727-h.htm"
|
|
|
|
log.info(f"file.content_type: {file.content_type}")
|
|
try:
|
|
unsanitized_filename = file.filename
|
|
filename = os.path.basename(unsanitized_filename)
|
|
|
|
file_path = f"{UPLOAD_DIR}/{filename}"
|
|
|
|
contents = file.file.read()
|
|
with open(file_path, "wb") as f:
|
|
f.write(contents)
|
|
f.close()
|
|
|
|
f = open(file_path, "rb")
|
|
if collection_name == None:
|
|
collection_name = calculate_sha256(f)[:63]
|
|
f.close()
|
|
|
|
loader, known_type = get_loader(filename, file.content_type, file_path)
|
|
data = loader.load()
|
|
|
|
try:
|
|
result = store_data_in_vector_db(data, collection_name)
|
|
|
|
if result:
|
|
return {
|
|
"status": True,
|
|
"collection_name": collection_name,
|
|
"filename": filename,
|
|
"known_type": known_type,
|
|
}
|
|
except Exception as e:
|
|
raise HTTPException(
|
|
status_code=status.HTTP_500_INTERNAL_SERVER_ERROR,
|
|
detail=e,
|
|
)
|
|
except Exception as e:
|
|
log.exception(e)
|
|
if "No pandoc was found" in str(e):
|
|
raise HTTPException(
|
|
status_code=status.HTTP_400_BAD_REQUEST,
|
|
detail=ERROR_MESSAGES.PANDOC_NOT_INSTALLED,
|
|
)
|
|
else:
|
|
raise HTTPException(
|
|
status_code=status.HTTP_400_BAD_REQUEST,
|
|
detail=ERROR_MESSAGES.DEFAULT(e),
|
|
)
|
|
|
|
|
|
class TextRAGForm(BaseModel):
|
|
name: str
|
|
content: str
|
|
collection_name: Optional[str] = None
|
|
|
|
|
|
@app.post("/text")
|
|
def store_text(
|
|
form_data: TextRAGForm,
|
|
user=Depends(get_current_user),
|
|
):
|
|
|
|
collection_name = form_data.collection_name
|
|
if collection_name == None:
|
|
collection_name = calculate_sha256_string(form_data.content)
|
|
|
|
result = store_text_in_vector_db(
|
|
form_data.content,
|
|
metadata={"name": form_data.name, "created_by": user.id},
|
|
collection_name=collection_name,
|
|
)
|
|
|
|
if result:
|
|
return {"status": True, "collection_name": collection_name}
|
|
else:
|
|
raise HTTPException(
|
|
status_code=status.HTTP_500_INTERNAL_SERVER_ERROR,
|
|
detail=ERROR_MESSAGES.DEFAULT(),
|
|
)
|
|
|
|
|
|
@app.get("/scan")
|
|
def scan_docs_dir(user=Depends(get_admin_user)):
|
|
for path in Path(DOCS_DIR).rglob("./**/*"):
|
|
try:
|
|
if path.is_file() and not path.name.startswith("."):
|
|
tags = extract_folders_after_data_docs(path)
|
|
filename = path.name
|
|
file_content_type = mimetypes.guess_type(path)
|
|
|
|
f = open(path, "rb")
|
|
collection_name = calculate_sha256(f)[:63]
|
|
f.close()
|
|
|
|
loader, known_type = get_loader(
|
|
filename, file_content_type[0], str(path)
|
|
)
|
|
data = loader.load()
|
|
|
|
try:
|
|
result = store_data_in_vector_db(data, collection_name)
|
|
|
|
if result:
|
|
sanitized_filename = sanitize_filename(filename)
|
|
doc = Documents.get_doc_by_name(sanitized_filename)
|
|
|
|
if doc == None:
|
|
doc = Documents.insert_new_doc(
|
|
user.id,
|
|
DocumentForm(
|
|
**{
|
|
"name": sanitized_filename,
|
|
"title": filename,
|
|
"collection_name": collection_name,
|
|
"filename": filename,
|
|
"content": (
|
|
json.dumps(
|
|
{
|
|
"tags": list(
|
|
map(
|
|
lambda name: {"name": name},
|
|
tags,
|
|
)
|
|
)
|
|
}
|
|
)
|
|
if len(tags)
|
|
else "{}"
|
|
),
|
|
}
|
|
),
|
|
)
|
|
except Exception as e:
|
|
log.exception(e)
|
|
pass
|
|
|
|
except Exception as e:
|
|
log.exception(e)
|
|
|
|
return True
|
|
|
|
|
|
@app.get("/reset/db")
|
|
def reset_vector_db(user=Depends(get_admin_user)):
|
|
CHROMA_CLIENT.reset()
|
|
|
|
|
|
@app.get("/reset")
|
|
def reset(user=Depends(get_admin_user)) -> bool:
|
|
folder = f"{UPLOAD_DIR}"
|
|
for filename in os.listdir(folder):
|
|
file_path = os.path.join(folder, filename)
|
|
try:
|
|
if os.path.isfile(file_path) or os.path.islink(file_path):
|
|
os.unlink(file_path)
|
|
elif os.path.isdir(file_path):
|
|
shutil.rmtree(file_path)
|
|
except Exception as e:
|
|
log.error("Failed to delete %s. Reason: %s" % (file_path, e))
|
|
|
|
try:
|
|
CHROMA_CLIENT.reset()
|
|
except Exception as e:
|
|
log.exception(e)
|
|
|
|
return True
|