forked from open-webui/open-webui
309 lines
7.9 KiB
Python
309 lines
7.9 KiB
Python
from fastapi import (
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FastAPI,
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Request,
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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
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# from chromadb.utils import embedding_functions
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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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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 langchain_community.vectorstores import Chroma
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from langchain.chains import RetrievalQA
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from pydantic import BaseModel
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from typing import Optional
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import uuid
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import time
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from utils.misc import calculate_sha256
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from utils.utils import get_current_user
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from config import UPLOAD_DIR, EMBED_MODEL, CHROMA_CLIENT, CHUNK_SIZE, CHUNK_OVERLAP
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from constants import ERROR_MESSAGES
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# EMBEDDING_FUNC = embedding_functions.SentenceTransformerEmbeddingFunction(
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# model_name=EMBED_MODEL
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# )
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app = FastAPI()
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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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def store_data_in_vector_db(data, collection_name) -> bool:
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text_splitter = RecursiveCharacterTextSplitter(
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chunk_size=CHUNK_SIZE, chunk_overlap=CHUNK_OVERLAP
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)
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docs = text_splitter.split_documents(data)
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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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collection = CHROMA_CLIENT.create_collection(name=collection_name)
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collection.add(
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documents=texts, metadatas=metadatas, ids=[str(uuid.uuid1()) for _ in texts]
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)
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return True
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except Exception as e:
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print(e)
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if e.__class__.__name__ == "UniqueConstraintError":
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return True
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return False
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@app.get("/")
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async def get_status():
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return {"status": True}
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@app.get("/query/{collection_name}")
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def query_collection(
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collection_name: str,
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query: str,
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k: Optional[int] = 4,
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user=Depends(get_current_user),
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):
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try:
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collection = CHROMA_CLIENT.get_collection(
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name=collection_name,
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)
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result = collection.query(query_texts=[query], n_results=k)
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return result
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except Exception as e:
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print(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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store_data_in_vector_db(data, form_data.collection_name)
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return {
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"status": True,
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"collection_name": form_data.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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print(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 get_loader(file, file_path):
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file_ext = file.filename.split(".")[-1].lower()
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known_type = True
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known_source_ext = [
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"go",
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"py",
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"java",
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"sh",
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"bat",
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"ps1",
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"cmd",
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"js",
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"ts",
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"css",
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"cpp",
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"hpp",
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"h",
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"c",
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"cs",
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"sql",
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"log",
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"ini",
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"pl",
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"pm",
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"r",
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"dart",
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"dockerfile",
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"env",
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"php",
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"hs",
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"hsc",
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"lua",
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"nginxconf",
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"conf",
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"m",
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"mm",
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"plsql",
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"perl",
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"rb",
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"rs",
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"db2",
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"scala",
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"bash",
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"swift",
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"vue",
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"svelte",
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]
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if file_ext == "pdf":
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loader = PyPDFLoader(file_path)
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elif file_ext == "csv":
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loader = CSVLoader(file_path)
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elif file_ext == "rst":
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loader = UnstructuredRSTLoader(file_path, mode="elements")
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elif file_ext == "xml":
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loader = UnstructuredXMLLoader(file_path)
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elif file_ext == "md":
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loader = UnstructuredMarkdownLoader(file_path)
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elif file.content_type == "application/epub+zip":
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loader = UnstructuredEPubLoader(file_path)
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elif (
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file.content_type
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== "application/vnd.openxmlformats-officedocument.wordprocessingml.document"
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or file_ext in ["doc", "docx"]
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):
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loader = Docx2txtLoader(file_path)
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elif file.content_type in [
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"application/vnd.ms-excel",
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"application/vnd.openxmlformats-officedocument.spreadsheetml.sheet",
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] or file_ext in ["xls", "xlsx"]:
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loader = UnstructuredExcelLoader(file_path)
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elif file_ext in known_source_ext or file.content_type.find("text/") >= 0:
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loader = TextLoader(file_path)
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else:
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loader = TextLoader(file_path)
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known_type = False
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return loader, known_type
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@app.post("/doc")
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def store_doc(
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collection_name: Optional[str] = Form(None),
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file: UploadFile = File(...),
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user=Depends(get_current_user),
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):
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# "https://www.gutenberg.org/files/1727/1727-h/1727-h.htm"
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print(file.content_type)
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try:
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filename = file.filename
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file_path = f"{UPLOAD_DIR}/{filename}"
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contents = file.file.read()
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with open(file_path, "wb") as f:
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f.write(contents)
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f.close()
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f = open(file_path, "rb")
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if collection_name == None:
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collection_name = calculate_sha256(f)[:63]
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f.close()
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loader, known_type = get_loader(file, file_path)
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data = loader.load()
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result = store_data_in_vector_db(data, collection_name)
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if result:
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return {
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"status": True,
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"collection_name": collection_name,
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"filename": filename,
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"known_type": known_type,
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}
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else:
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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(),
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)
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except Exception as e:
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print(e)
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if "No pandoc was found" in str(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.PANDOC_NOT_INSTALLED,
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)
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else:
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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.get("/reset/db")
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def reset_vector_db(user=Depends(get_current_user)):
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if user.role == "admin":
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CHROMA_CLIENT.reset()
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else:
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raise HTTPException(
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status_code=status.HTTP_403_FORBIDDEN,
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detail=ERROR_MESSAGES.ACCESS_PROHIBITED,
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)
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@app.get("/reset")
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def reset(user=Depends(get_current_user)) -> bool:
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if user.role == "admin":
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folder = f"{UPLOAD_DIR}"
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for filename in os.listdir(folder):
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file_path = os.path.join(folder, filename)
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try:
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if os.path.isfile(file_path) or os.path.islink(file_path):
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os.unlink(file_path)
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elif os.path.isdir(file_path):
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shutil.rmtree(file_path)
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except Exception as e:
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print("Failed to delete %s. Reason: %s" % (file_path, e))
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try:
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CHROMA_CLIENT.reset()
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except Exception as e:
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print(e)
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return True
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else:
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raise HTTPException(
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status_code=status.HTTP_403_FORBIDDEN,
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detail=ERROR_MESSAGES.ACCESS_PROHIBITED,
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)
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