四种POST 请求方式：

https://imququ.com/post/four-ways-to-post-data-in-http.html#toc-2

Content-Type: application/x-www-form-urlencoded 最原始表单，参数单一，不能传文件。

Content-Type

Content-Type: application/json 倾向于传json，json规范导致前后端传数据都喜欢用这个，数据生产和消费简单。

FastAPI 中如何支持

https://fastapi.tiangolo.com/zh/tutorial/schema-extra-example/

把函数参数改为Body解析即可，而不是FORM解析。

python
# -*- coding:utf-8 -*-
import traceback
import uvicorn
from typing import Optional
from fastapi import Body, FastAPI
from pydantic import BaseModel
from fastapi.middleware.cors import CORSMiddleware
app = FastAPI(
    title='FastAPI',
    description='FastAPI',
    version='1.0.0',
    docs_url='/docs',
    redoc_url='/redocs',
)
app.add_middleware(
    CORSMiddleware,
    allow_origins=["*"],
    allow_credentials=True,
    allow_methods=["*"],
    allow_headers=["*"],
)
class Item(BaseModel):
    name: str
    description: Optional[str] = None
    price: float
    tax: Optional[float] = None
@app.post("/items/{item_id}")
async def update_item(
        item_id: int,
        item: Item = Body(
            ...,
            example={
                "name": "Foo",
                "description": "A very nice Item",
                "price": 35.4,
                "tax": 3.2,
            },
        ),
):
    results = {"item_id": item_id, "item": item}
    return results
if __name__ == '__main__':
    uvicorn.run('fastapia:app', host='0.0.0.0', port=8001, reload=False, debug=False, workers=1)

PostMan 测试

修改请求头

写raw的原生json字符串

python
import requests
requests.post(url="http://0.0.0.0:8001/items/1",
              json={
                  "name": "Foo",
                  "description": "A very nice Item",
                  "price": 35.4,
                  "tax": 3.2,
              },
              )