re-organized backend

2026-01-19 21:42:34 +00:00
parent 6b08f55983
commit 8ecadcf2e5
7 changed files with 581 additions and 221 deletions
--- a/server/py/fastapi_server/main.py
+++ b/server/py/fastapi_server/main.py
@@ -1,222 +1,124 @@
-from fastapi import FastAPI, HTTPException, Request, Response
-#from fastapi import Body, Cookie, File, Form, Header, Path, Query
-from contextlib import asynccontextmanager
-from pydantic import BaseModel, ValidationError
-from typing import Optional
-import uvicorn
-import aiomysql
+# src/main.py
+from fastapi import FastAPI, HTTPException, status, Request
+from fastapi.responses import JSONResponse, PlainTextResponse
 import os
 import bcrypt
 import asyncio
-import aiosqlite
-import subprocess
+import logging

-from yt_dlp import YoutubeDL
-from yt_dlp.utils import DownloadError
+# Configure logging
+logging.basicConfig(level=logging.INFO, format='%(asctime)s - %(levelname)s - %(message)s')
+logger = logging.getLogger(__name__)

-#from pytube import YouTube
-#from moviepy.audio.io import AudioFileClip
+from . import db_setup as db  # Import the entire db_setup module
+from .user_mgmt import *
+from .media_mgmt import *

-#import asyncio
+app = FastAPI(
+    title="YT2MP3 API",
+    description="Simple API to download YouTube videos as MP3.",
+    version="1.0.0",
+    license_info="MIT",
+    lifespan=db.lifespan
+)

-# In this FastAPI example, we skip BaseModel verification cause NuxtJS does that for us
-# In other words, this backend only recieves requests from nuxt js backend
-# So we can trust it
+# Global error handler
+@app.exception_handler(Exception)
+async def global_exception_handler(request, exc):
+    logger.exception(f"An unexpected error occurred: {exc}")
+    return JSONResponse(content={"error": "Internal Server Error"}, status_code=500)

-class db:
+# Health check endpoint
+@app.get("/health", status_code=status.HTTP_200_OK)
+async def health_check():
+    return {"status": "ok"}

-    mode = os.environ.get("DB_MODE", "sqlite")
-
-    # For SQLite usage
-
-    file = os.environ.get("SQLITE_FILE","./database.db")
-
-    # For MySQL usage
-    pool = None
-
-    host = os.environ.get("MYSQL_HOST","127.0.0.1")
-    user = os.environ.get("MYSQL_USER","yt2mp3")
-    db_name = os.environ.get("MYSQL_DB","yt2mp3")
-    pwd = os.environ.get("MYSQL_PASSWORD","")
-
-
-@asynccontextmanager
-async def lifespan(app: FastAPI):
-    if db.mode == "mysql":
-        db.pool = await aiomysql.create_pool(host=db.host,user=db.user,password=db.pwd,db=db.db_name, minsize=1, maxsize=10)
-        try:
-            yield
-        finally: 
-            db.pool.close()
-            await db.pool.wait_closed()
+#
+# User-related endpoints
+# 
+@app.get("/me")
+async def me_endpoint(req: Request):
+    query = dict(req.query_params)
+    if "id" not in query.keys(): raise HTTPException(400, "Give ID")
+        
+    user = await fetch_user_info(query["id"],"id")
+    if user is None: raise HTTPException(404, "User not found")
    else:
-        try:
-            yield
-        finally: pass # no action required now
-
-app = FastAPI(lifespan=lifespan)
-
-
-async def fetch_user_info(arg: str, type: str):
-    if db.mode == "mysql":
-        async with db.pool.acquire() as conn:
-            async with conn.cursor(aiomysql.DictCursor) as cur:
-                await cur.execute("SELECT * FROM users WHERE %s = %s", (type, arg))
-                return await cur.fetchone()
-    elif db.mode == "sqlite":
-        async with aiosqlite.connect(db.file) as conn:
-            async with conn.execute("SELECT * FROM users WHERE ? = ?", (type, arg)) as cursor:
-                return await cursor.fetchone()
-
-def download_audio(video_url: str, output_folder: str) -> str:
-    ydl_opts = {
-        'format': 'bestaudio/best',
-        'outtmpl': os.path.join(output_folder, '%(title)s.%(ext)s'),
-        'postprocessors': [{
-            'key': 'FFmpegExtractAudio',
-            'preferredcodec': 'mp3',
-            'preferredquality': '192',
-        }, {
-            'key': 'FFmpegMetadata',
-            'add_metadata': True,
-        }],
-        'quiet': True,
-        'noplaylist': True
-    }
-
-    with YoutubeDL(ydl_opts) as ydl:
-        info = ydl.extract_info(video_url, download=True)
-        filename = ydl.prepare_filename(info)
-        return os.path.splitext(filename)[0] + ".mp3"  # path to final MP3
-
-def set_metadata_and_rename(mp3_file: str, name: str, artist: str = None, album: str = None) -> str:
-    new_file = os.path.abspath(os.path.join(os.path.dirname(mp3_file), f"{name}.mp3"))
-    
-    cmd = ["ffmpeg", "-y", "-i", mp3_file]
-    
-    # Only add metadata if provided
-    cmd += ["-metadata", f"title={name}"]
-    if artist:
-        cmd += ["-metadata", f"artist={artist}"]
-    if album:
-        cmd += ["-metadata", f"album={album}"]
-    
-    cmd += [new_file]
-    
-    subprocess.run(cmd, check=True)
-    os.remove(mp3_file)  # clean original
-    return new_file
-
-
-# Configuration (customize these!)
-DOWNLOAD_FOLDER = os.environ.get("DOWNLOAD_FOLDER","downloads")  # Where the converted files will be saved
-if not os.path.exists(DOWNLOAD_FOLDER):
-    os.makedirs(DOWNLOAD_FOLDER)
-    
-# Throw error if the env is incorrect
-try:
-    AUTODELETE_DELAY_SECS = int(os.environ.get("FILE_AUTODELETE_DELAY_SECS", 0))
-except ValueError:
-    raise EnvironmentError("You must set AUTODELETE_DELAY_SECS to a valid number (int) of seconds! To disable auto delete (not recommended), set it to 0")
-    
-async def delay_delete_file(file:str):
-    if (AUTODELETE_DELAY_SECS > 0):
-        await asyncio.sleep(AUTODELETE_DELAY_SECS)
-        if os.path.exists(file): os.unlink(file)
-
-@app.post("/convert")
-async def create_conversion(req: Request):
-    """Converts a YouTube video to MP3."""
-    body = await req.json()
-    print(body)
-    video_url = body.get("video_url")
-    user_id = body.get("user_id")
-    
-    if (video_url is None): raise HTTPException(400, "Please provide an URL on body")
-    if (body.get("user_id") is None): raise HTTPException(401, "No User ID")
-
-    USER_FOLDER = os.path.join(DOWNLOAD_FOLDER, str(user_id))
-    if not os.path.exists(USER_FOLDER): os.mkdir(USER_FOLDER)
-    try:
-        file = await asyncio.to_thread(download_audio, video_url, USER_FOLDER)
-    except DownloadError as e:
-        raise HTTPException(500, "Error while downloading " + e.msg)
-    final_file = await asyncio.to_thread(set_metadata_and_rename, file, body.get("song"), body.get("artist"), body.get("album"))
-    file_name = final_file.split("/")[-1]
-
-    print("File served: " + final_file)
-    asyncio.create_task(delay_delete_file(final_file))
-
-    return { "file" : file_name }
-
-
-
-@app.post("/register")
-async def create_user(req: Request):
-    body = await req.json()
-
-    # Auto exceptions give more verbose to Nuxt.
-
-    body["password"] = bcrypt.hashpw(body["password"].encode(), bcrypt.gensalt()).decode()
-    if db.mode == "mysql":
-        async with db.pool.acquire() as conn:
-            async with conn.cursor() as cur:
-                await cur.execute("INSERT INTO users (`first_name`,`last_name`,`email`,`password`) VALUES (%s,%s,%s,%s)", (body.first_name, body.last_name, body.email, body.password))
-                await conn.commit()   
-    elif db.mode == "sqlite":
-        async with aiosqlite.connect(db.file) as conn:
-            await conn.execute("INSERT INTO users (`first_name`,`last_name`,`email`,`password`) VALUES (?, ?, ?, ?)", (body.first_name, body.last_name, body.email, body.password))
-            await conn.commit()
-
+        return user

@app.post("/login")
 async def login_endpoint(req: Request):
-    
    body = await req.json()
-    #print(body)
+    needed_keys = ("email","password")
+    for key in needed_keys: 
+        if body.get(key) is None:
+            raise HTTPException(400, "Missing args")
+        
+    login_obj = login_user(body["email"], body["password"])
+    if login_obj is None:
+        raise HTTPException(401, "Incorrect login")
+    else:
+        return login_obj
+        
+@app.post("/register")
+async def register_endpoint(req: Request):
+    body = await req.json()
+
+    for key in ("email","password", "first_name", "last_name"): 
+        if body.get(key) is None:
+            raise HTTPException(400, "Missing args")
+    
+    # check if user exists. 
+    if await fetch_user_info(body["email"],"email") is not None:
+        raise HTTPException(403, "User already exists")
+        
+    create_user(body["fist_name"], body["last_name"], body["email"], body["password"])
+    return PlainTextResponse("User registered")
+
+@app.put("/edit_user")
+async def edit_endpoint(req: Request):
+    body:dict = await req.json()
+    
+    if "user_id" not in body.keys(): raise HTTPException(400, "Provide user ID")
+    
+    params = body
+    params.pop("user_id")
+
+    edit_user(body["user_id"], params)
+    return PlainTextResponse("User edited")
+
+# 
+# Track-specific endpoints
+#
+@app.post("/convert")
+async def begin_conversion(req: Request):
+    body:dict = await req.json()
+
+    video_url = body.get("video_url")
+    user_id = body.get("user_id")
+    quality = body.get("kbps")
+    
+    if (video_url is None): raise HTTPException(400, "Please provide an URL on body")
+    if (user_id is None): raise HTTPException(401, "No User ID")
+
+    # User folder is DOWNLOAD_FOLDER/<userid>
+    USER_FOLDER = os.path.join(DOWNLOAD_FOLDER, str(user_id))
+    if not os.path.exists(USER_FOLDER): os.mkdir(USER_FOLDER)
+
    try:
-        user_data = await fetch_user_info(body["email"], "email")
-        if (user_data is None): 
-            print("User doesn't exist")
-            raise HTTPException(status_code=401, detail="User doesn't exist")
-        else:
-            pwd = user_data.get("password")
-            if (bcrypt.checkpw(body["password"].encode(), user_data.get("password").encode())):
-                return user_data
-            else:
-                print("Wrong password")
-                raise HTTPException(status_code=401, detail="Wrong password")
-    except KeyError:
-        raise HTTPException(status_code=400)
-    #except ValidationError:
-    #    raise HTTPException(status_code=400)
+        file = await asyncio.to_thread(download_audio, video_url, USER_FOLDER, quality)
+        final_file = await asyncio.to_thread(set_metadata_and_rename, file, body.get("song"), body.get("artist"), body.get("album"))
+        file_name = final_file.split("/")[-1]

+        print("File served: " + final_file)
+        asyncio.create_task(delay_delete_file(final_file))

-@app.get("/me")
-async def me_get_endpoint(req: Request):
-    """
-    Retrieves user profile data.
-
-    Trusts Nuxt's backend to allow it or not.
-    """
-    args = dict(req.query_params)
-    me = None
-    try:
-    # Prefer id over e-mail
-        if "id" in args.keys(): me = fetch_user_info(args["id"], "id")
-        elif "email" in args.keys(): me = fetch_user_info(args["email"], "email")
-        else: raise HTTPException(400, "Provide either email or user id")
-    #print(args)
-        if (me is None):
-            raise HTTPException(404, "User doesn't exist")
-        else: return me
-    except KeyError:
-        raise HTTPException(400, "Please provide email")
-
-
-
-
-if __name__ == "__main__":
-    listen_host = str(os.environ.get("HOST", "127.0.0.1"))
-    listen_port = int(os.environ.get("PORT", 3000))
-    uvicorn.run(app,host=listen_host,port=listen_port)
+        return { "file" : file_name }
+    except KeyError as e:
+        raise HTTPException(status_code=status.HTTP_400_BAD_REQUEST, detail=f"Missing parameter: {e}")
+    except DownloadError as e:
+        logger.exception(f"Download error: {e}")
+        raise HTTPException(status_code=status.HTTP_500_INTERNAL_SERVER_ERROR, detail="Failed to download video")
+    except Exception as e:
+        logger.exception(f"Error during media conversion: {e}")
+        raise HTTPException(status_code=status.HTTP_500_INTERNAL_SERVER_ERROR, detail="Failed to convert media")