前端跨域方法和后端跨域方法二选一,推荐后端跨域
什么是跨域问题?
前端是localhost:3000,后端是localhost:8000 ,就是跨域了
Vue跨域方法
在vue.config.ts中,server中,增加proxy部分的代码,意思是 将/api 重写成 后端的地址
server: {
host:'0.0.0.0',
open: true,
proxy: {
'/api': {
target: "http://127.0.0.1:8000",
changeOrigin: true,
rewrite(path) {
return path.replace(/^\/api/, '')
},
},
},
},
然后vue中用axios访问后端的网址就写成
import axios from 'axios'
export const addNutInfo = (req:any) => {
return axios.post('/api/nut/${line}',req)}
相当于 http://127.0.0.1:8000/nut/${line}
后端FastAPI跨域方法
参考https://fastapi.tiangolo.com/zh/tutorial/cors/
origins列表中写的是 前端端口号 比如3000
from fastapi import FastAPI
from fastapi.middleware.cors import CORSMiddleware
app = FastAPI()
origins = [
"http://localhost.tiangolo.com",
"https://localhost.tiangolo.com",
"http://localhost",
"http://localhost:8080",
]
app.add_middleware(
CORSMiddleware,
allow_origins=origins,
allow_credentials=True,
allow_methods=["*"],
allow_headers=["*"],
)
@app.get("/")
async def main():
return {"message": "Hello World"}
推荐后端跨域的办法,vue前端直接写后端端口就行
export const getNutSum=(line:any) =>{
return axios.get(`http://127.0.0.1:8000/getsum/${line}`)
}