request.ts
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import axios, { type AxiosError, type AxiosResponse, type InternalAxiosRequestConfig } from 'axios'
import type { ApiResponse } from './types'
export const TOKEN_KEY = 'erp.accessToken'
const instance = axios.create({
baseURL: '/api',
timeout: 15000,
})
instance.interceptors.request.use((cfg: InternalAxiosRequestConfig) => {
const token = sessionStorage.getItem(TOKEN_KEY)
if (token) cfg.headers.set('Authorization', `Bearer ${token}`)
return cfg
})
let onUnauthorized: (() => void) | null = null
export function setUnauthorizedHandler(fn: () => void) {
onUnauthorized = fn
}
instance.interceptors.response.use(
(res: AxiosResponse<ApiResponse<unknown>>) => res,
(err: AxiosError) => {
if (err.response?.status === 401) onUnauthorized?.()
return Promise.reject(err)
},
)
/** Throws BizError when code !== 200; returns data on success. */
export class BizError extends Error {
code: number
payload: unknown
constructor(code: number, message: string, payload: unknown) {
super(message)
this.code = code
this.payload = payload
}
}
export async function call<T>(req: () => Promise<AxiosResponse<ApiResponse<T>>>): Promise<T> {
const res = await req()
const body = res.data
if (body.code !== 200) {
throw new BizError(body.code, body.message, body.data)
}
return body.data
}
export default instance