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from fastapi import FastAPI, Depends, Request, Path
from fastapi.middleware.cors import CORSMiddleware
from fastapi.responses import RedirectResponse, JSONResponse
from fastapi.templating import Jinja2Templates
from app.routes.auth_routes import router as auth_router
from app.routes.links_routes import router as links_router
from app.routes.user_routes import router as user_router
from typing import Annotated, Union
from fastapi.exceptions import HTTPException
from starlette.status import HTTP_404_NOT_FOUND
from app.util.authentication import get_current_user
from app.util.db_dependency import get_db
from app.util.log import log
from app.schemas.auth_schemas import User
from models import Link
app = FastAPI(
title="LinkLogger API",
version="2.0",
summary="Public API for a combined link shortener and IP logger",
license_info={
"name": "The Unlicense",
"identifier": "Unlicense",
"url": "https://unlicense.org",
},
)
app.add_middleware(
CORSMiddleware,
allow_origins=["*"],
allow_methods=["*"],
allow_headers=["*"],
allow_credentials=True,
)
templates = Jinja2Templates(directory="app/templates")
# Import routes
app.include_router(auth_router, prefix="/api")
app.include_router(links_router, prefix="/api")
app.include_router(user_router, prefix="/api")
@app.get("/login")
async def login(request: Request):
return templates.TemplateResponse("login.html", {"request": request})
@app.get("/signup")
async def signup(request: Request):
return templates.TemplateResponse("signup.html", {"request": request})
@app.get("/dashboard")
async def dashboard(
request: Request,
response: Union[User, RedirectResponse] = Depends(get_current_user),
):
if isinstance(response, RedirectResponse):
return response
return templates.TemplateResponse(
"dashboard.html", {"request": request, "user": response.username}
)
@app.get("/c/{link}")
async def log_redirect(
link: Annotated[str, Path(title="Redirect link")],
request: Request,
db=Depends(get_db),
):
link = link.upper()
# Links must be 5 characters long
if len(link) != 5:
return RedirectResponse(url="/login")
# Make sure the link exists in the database
link_record: Link = db.query(Link).filter(Link.link == link).first()
if not link_record:
db.close()
return RedirectResponse(url="/login")
else:
# Get the IP and log the request
if request.headers.get("X-Real-IP"):
ip = request.headers.get("X-Real-IP").split(",")[0]
else:
ip = request.client.host
user_agent = request.headers.get("User-Agent")
log(link, ip, user_agent)
db.close()
return RedirectResponse(url=link_record.redirect_link)
# Redirect /api -> /api/docs
@app.get("/api")
async def redirect_to_docs():
return RedirectResponse(url="/docs")
# Custom handler for 404 errors
@app.exception_handler(HTTP_404_NOT_FOUND)
async def custom_404_handler(request: Request, exc: HTTPException):
# If the request is from /api, return a JSON response
if request.url.path.startswith("/api"):
return JSONResponse(
status_code=404,
content={"message": "Resource not found"},
)
# Otherwise, redirect to the login page
return RedirectResponse(url="/login")
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