open-webui/backend/main.py
2024-04-26 17:19:50 -04:00

335 lines
9.6 KiB
Python

from bs4 import BeautifulSoup
import json
import markdown
import time
import os
import sys
import logging
import aiohttp
import requests
from fastapi import FastAPI, Request, Depends, status
from fastapi.staticfiles import StaticFiles
from fastapi import HTTPException
from fastapi.middleware.wsgi import WSGIMiddleware
from fastapi.middleware.cors import CORSMiddleware
from starlette.exceptions import HTTPException as StarletteHTTPException
from starlette.middleware.base import BaseHTTPMiddleware
from apps.ollama.main import app as ollama_app
from apps.openai.main import app as openai_app
from apps.litellm.main import (
app as litellm_app,
start_litellm_background,
shutdown_litellm_background,
)
from apps.audio.main import app as audio_app
from apps.images.main import app as images_app
from apps.rag.main import app as rag_app
from apps.web.main import app as webui_app
import asyncio
from pydantic import BaseModel
from typing import List
from utils.utils import get_admin_user
from apps.rag.utils import rag_messages
from config import (
CONFIG_DATA,
WEBUI_NAME,
ENV,
VERSION,
CHANGELOG,
FRONTEND_BUILD_DIR,
CACHE_DIR,
STATIC_DIR,
ENABLE_LITELLM,
ENABLE_MODEL_FILTER,
MODEL_FILTER_LIST,
GLOBAL_LOG_LEVEL,
SRC_LOG_LEVELS,
WEBHOOK_URL,
ENABLE_ADMIN_EXPORT,
)
from constants import ERROR_MESSAGES
logging.basicConfig(stream=sys.stdout, level=GLOBAL_LOG_LEVEL)
log = logging.getLogger(__name__)
log.setLevel(SRC_LOG_LEVELS["MAIN"])
class SPAStaticFiles(StaticFiles):
async def get_response(self, path: str, scope):
try:
return await super().get_response(path, scope)
except (HTTPException, StarletteHTTPException) as ex:
if ex.status_code == 404:
return await super().get_response("index.html", scope)
else:
raise ex
print(
f"""
___ __ __ _ _ _ ___
/ _ \ _ __ ___ _ __ \ \ / /__| |__ | | | |_ _|
| | | | '_ \ / _ \ '_ \ \ \ /\ / / _ \ '_ \| | | || |
| |_| | |_) | __/ | | | \ V V / __/ |_) | |_| || |
\___/| .__/ \___|_| |_| \_/\_/ \___|_.__/ \___/|___|
|_|
v{VERSION} - building the best open-source AI user interface.
https://github.com/open-webui/open-webui
"""
)
app = FastAPI(docs_url="/docs" if ENV == "dev" else None, redoc_url=None)
app.state.ENABLE_MODEL_FILTER = ENABLE_MODEL_FILTER
app.state.MODEL_FILTER_LIST = MODEL_FILTER_LIST
app.state.WEBHOOK_URL = WEBHOOK_URL
origins = ["*"]
class RAGMiddleware(BaseHTTPMiddleware):
async def dispatch(self, request: Request, call_next):
if request.method == "POST" and (
"/api/chat" in request.url.path or "/chat/completions" in request.url.path
):
log.debug(f"request.url.path: {request.url.path}")
# Read the original request body
body = await request.body()
# Decode body to string
body_str = body.decode("utf-8")
# Parse string to JSON
data = json.loads(body_str) if body_str else {}
# Example: Add a new key-value pair or modify existing ones
# data["modified"] = True # Example modification
if "docs" in data:
data = {**data}
data["messages"] = rag_messages(
data["docs"],
data["messages"],
rag_app.state.RAG_TEMPLATE,
rag_app.state.TOP_K,
rag_app.state.RELEVANCE_THRESHOLD,
rag_app.state.ENABLE_RAG_HYBRID_SEARCH,
rag_app.state.RAG_EMBEDDING_ENGINE,
rag_app.state.RAG_EMBEDDING_MODEL,
rag_app.state.sentence_transformer_ef,
rag_app.state.sentence_transformer_rf,
rag_app.state.OPENAI_API_KEY,
rag_app.state.OPENAI_API_BASE_URL,
)
del data["docs"]
log.debug(f"data['messages']: {data['messages']}")
modified_body_bytes = json.dumps(data).encode("utf-8")
# Replace the request body with the modified one
request._body = modified_body_bytes
# Set custom header to ensure content-length matches new body length
request.headers.__dict__["_list"] = [
(b"content-length", str(len(modified_body_bytes)).encode("utf-8")),
*[
(k, v)
for k, v in request.headers.raw
if k.lower() != b"content-length"
],
]
response = await call_next(request)
return response
async def _receive(self, body: bytes):
return {"type": "http.request", "body": body, "more_body": False}
app.add_middleware(RAGMiddleware)
app.add_middleware(
CORSMiddleware,
allow_origins=origins,
allow_credentials=True,
allow_methods=["*"],
allow_headers=["*"],
)
@app.middleware("http")
async def check_url(request: Request, call_next):
start_time = int(time.time())
response = await call_next(request)
process_time = int(time.time()) - start_time
response.headers["X-Process-Time"] = str(process_time)
return response
@app.on_event("startup")
async def on_startup():
if ENABLE_LITELLM:
asyncio.create_task(start_litellm_background())
app.mount("/api/v1", webui_app)
app.mount("/litellm/api", litellm_app)
app.mount("/ollama", ollama_app)
app.mount("/openai/api", openai_app)
app.mount("/images/api/v1", images_app)
app.mount("/audio/api/v1", audio_app)
app.mount("/rag/api/v1", rag_app)
@app.get("/api/config")
async def get_app_config():
# Checking and Handling the Absence of 'ui' in CONFIG_DATA
default_locale = "en-US"
if "ui" in CONFIG_DATA:
default_locale = CONFIG_DATA["ui"].get("default_locale", "en-US")
# The Rest of the Function Now Uses the Variables Defined Above
return {
"status": True,
"name": WEBUI_NAME,
"version": VERSION,
"default_locale": default_locale,
"images": images_app.state.ENABLED,
"default_models": webui_app.state.DEFAULT_MODELS,
"default_prompt_suggestions": webui_app.state.DEFAULT_PROMPT_SUGGESTIONS,
"trusted_header_auth": bool(webui_app.state.AUTH_TRUSTED_EMAIL_HEADER),
"admin_export_enabled": ENABLE_ADMIN_EXPORT,
}
@app.get("/api/config/model/filter")
async def get_model_filter_config(user=Depends(get_admin_user)):
return {
"enabled": app.state.ENABLE_MODEL_FILTER,
"models": app.state.MODEL_FILTER_LIST,
}
class ModelFilterConfigForm(BaseModel):
enabled: bool
models: List[str]
@app.post("/api/config/model/filter")
async def update_model_filter_config(
form_data: ModelFilterConfigForm, user=Depends(get_admin_user)
):
app.state.ENABLE_MODEL_FILTER = form_data.enabled
app.state.MODEL_FILTER_LIST = form_data.models
ollama_app.state.ENABLE_MODEL_FILTER = app.state.ENABLE_MODEL_FILTER
ollama_app.state.MODEL_FILTER_LIST = app.state.MODEL_FILTER_LIST
openai_app.state.ENABLE_MODEL_FILTER = app.state.ENABLE_MODEL_FILTER
openai_app.state.MODEL_FILTER_LIST = app.state.MODEL_FILTER_LIST
litellm_app.state.ENABLE_MODEL_FILTER = app.state.ENABLE_MODEL_FILTER
litellm_app.state.MODEL_FILTER_LIST = app.state.MODEL_FILTER_LIST
return {
"enabled": app.state.ENABLE_MODEL_FILTER,
"models": app.state.MODEL_FILTER_LIST,
}
@app.get("/api/webhook")
async def get_webhook_url(user=Depends(get_admin_user)):
return {
"url": app.state.WEBHOOK_URL,
}
class UrlForm(BaseModel):
url: str
@app.post("/api/webhook")
async def update_webhook_url(form_data: UrlForm, user=Depends(get_admin_user)):
app.state.WEBHOOK_URL = form_data.url
webui_app.state.WEBHOOK_URL = app.state.WEBHOOK_URL
return {
"url": app.state.WEBHOOK_URL,
}
@app.get("/api/version")
async def get_app_config():
return {
"version": VERSION,
}
@app.get("/api/changelog")
async def get_app_changelog():
return {key: CHANGELOG[key] for idx, key in enumerate(CHANGELOG) if idx < 5}
@app.get("/api/version/updates")
async def get_app_latest_release_version():
try:
async with aiohttp.ClientSession() as session:
async with session.get(
"https://api.github.com/repos/open-webui/open-webui/releases/latest"
) as response:
response.raise_for_status()
data = await response.json()
latest_version = data["tag_name"]
return {"current": VERSION, "latest": latest_version[1:]}
except aiohttp.ClientError as e:
raise HTTPException(
status_code=status.HTTP_503_SERVICE_UNAVAILABLE,
detail=ERROR_MESSAGES.RATE_LIMIT_EXCEEDED,
)
@app.get("/manifest.json")
async def get_manifest_json():
return {
"name": WEBUI_NAME,
"short_name": WEBUI_NAME,
"start_url": "/",
"display": "standalone",
"background_color": "#343541",
"theme_color": "#343541",
"orientation": "portrait-primary",
"icons": [{"src": "/favicon.png", "type": "image/png", "sizes": "844x884"}],
}
app.mount("/static", StaticFiles(directory=STATIC_DIR), name="static")
app.mount("/cache", StaticFiles(directory=CACHE_DIR), name="cache")
app.mount(
"/",
SPAStaticFiles(directory=FRONTEND_BUILD_DIR, html=True),
name="spa-static-files",
)
@app.on_event("shutdown")
async def shutdown_event():
if ENABLE_LITELLM:
await shutdown_litellm_background()