Form Data & Asynchronous File Uploads — Belajar FastAPI

🎯 Poin-Poin Utama Modul Ini:

Menginstal package python-multipart untuk menangani form-data
UploadFile menggunakan penanganan berbasis file spooled di memori/disk yang sangat efisien
Metode async .read(), .write(), .seek()

📁 Upload File & Form Processing

Untuk mengunggah gambar profil postingan atau dokumen PDF, FastAPI menyediakan kelas khusus UploadFile yang tidak menghabiskan RAM server.

💻 Kode Form Data & File Saving

main.py

import shutil
from fastapi import FastAPI, File, UploadFile, Form

app = FastAPI()

@app.post("/upload-avatar/")
async def upload_avatar(
    username: str = Form(...),
    file: UploadFile = File(...)
):
    file_path = f"static/avatars/{file.filename}"
    with open(file_path, "wb") as buffer:
        shutil.copyfileobj(file.file, buffer)
    return {"username": username, "avatar_url": file_path}