19_ Request forms and documents

We can use... At the same time File and Form Define file and form fields .

explain ： Receive uploaded file or form data , To pre install python-multipart modular .

---

Definition File and Form Parameters

Use the same method as before to create File and Form Parameters ：

from fastapi import FastAPI, File, Form, UploadFile

app = FastAPI()


@app.post("/files/")
async def create_file(
    file: bytes = File(), fileb: UploadFile = File(), token: str = Form()  #  At the same time define File and Form Parameters 
):
    return {
    
        "file_size": len(file),
        "token": token,
        "fileb_content_type": fileb.content_type,
    }

Files and form fields will be uploaded by users as form data , Then we receive .

meanwhile , We can also declare some files as bytes, The other part is declared as UploadFiles.

Warning ：

We can declare multiple in one path operation File and Form Parameters , however , Cannot declare to receive at the same time JSON Of Body Field .

Because the code of the request body is multipart/form-data, instead of application/json.

This is a HTTP Provisions of the agreement , No FastAPI The problem of .