FastAPI provides a simple way to handle file uploads using the File and UploadFile classes. To upload a file, you would define an endpoint that includes a parameter of type UploadFile. This parameter will be treated as a “form data” parameter.
Here’s a basic example :
from fastapi import FastAPI, UploadFile, File
app = FastAPI()
@app.post("/files/")
async def create_file(file: UploadFile = File(...)):
return {"filename": file.filename}?
In this code, file:
UploadFile = File(...) declares a new parameter of type
UploadFile. The
File function is a “special function” used to declare it.
The uploaded file is stored in memory up to a limit, and then passed to a temporary file stored on disk. You can access the file with
.file, get metadata like filename or content type with
.filename and
.content_type.
