| 1 | import type { IFetchServiceConfig, RequestParams } from './types' |
| 2 | |
| 3 | /** |
| 4 | * 泛型： |
| 5 | * T=返回类型 |
| 6 | */ |
| 7 | class FetchService<T = Response> { |
| 8 | baseURL: string |
| 9 | // 请求拦截 |
| 10 | requestInterceptor?: (requestParams: RequestParams) => RequestParams | void | null |
| 11 | |
| 12 | // 响应拦截 |
| 13 | responseInterceptor?: (response: Response) => T |
| 14 | |
| 15 | constructor({ baseURL, requestInterceptor, responseInterceptor }: IFetchServiceConfig<T>) { |
| 16 | this.baseURL = baseURL |
| 17 | this.requestInterceptor = requestInterceptor |
| 18 | this.responseInterceptor = responseInterceptor |
| 19 | } |
| 20 | |
| 21 | // 过滤一个字典 value 为undefined的key |
| 22 | private _filterDictUndefined(data: object) { |
| 23 | return Object.fromEntries(Object.entries(data).filter(([_, value]) => value !== undefined)) |
| 24 | } |
| 25 | |
| 26 | private _stringifySearchParams(data: object) { |
| 27 | const searchParams = new URLSearchParams() |
| 28 | Object.entries(data).forEach(([key, value]) => { |
| 29 | if (value !== undefined && value !== null) { |
| 30 | searchParams.set(key, String(value)) |
| 31 | } |
| 32 | }) |
| 33 | return searchParams.toString() |
| 34 | } |
| 35 | |
| 36 | public async request(requestParams: RequestParams): Promise<T> { |
| 37 | return new Promise(async (resolve, reject) => { |
| 38 | // 请求拦截 |
| 39 | if (this.requestInterceptor) { |
| 40 | const newRequestParams = this.requestInterceptor(requestParams) |
| 41 | if (!newRequestParams) |
| 42 | return reject(null) |
| 43 | requestParams = newRequestParams |
| 44 | } |
| 45 | |
| 46 | let baseURL = this.baseURL |
| 47 | if (requestParams.url.startsWith('assets/') && requestParams.url.endsWith('/uploadSign') && process.env.NEXT_PUBLIC_OSS_TEMP_URL) { |
| 48 | baseURL = process.env.NEXT_PUBLIC_OSS_TEMP_URL |
| 49 | } |
| 50 | |
| 51 | // body 参数处理 |
| 52 | const fetchURL = requestParams.url.startsWith('http') |
| 53 | ? requestParams.url |
| 54 | : baseURL + requestParams.url |
| 55 | if (!requestParams.body && requestParams.data) { |
| 56 | // 检查是否为FormData |
| 57 | if (requestParams.data instanceof FormData) { |
| 58 | // 如果是FormData，直接设置为body，不需要转JSON |
| 59 | requestParams = { |
| 60 | ...requestParams, |
| 61 | body: requestParams.data, |
| 62 | // 不手动设置Content-Type，让浏览器自动处理 |
| 63 | } |
| 64 | } |
| 65 | else { |
| 66 | // 非FormData对象走原来的逻辑 |
| 67 | requestParams.data = this._filterDictUndefined(requestParams.data) |
| 68 | requestParams = { |
| 69 | ...requestParams, |
| 70 | body: requestParams.body ? requestParams.body : JSON.stringify(requestParams.data), |
| 71 | headers: { |
| 72 | ...(requestParams.headers || {}), |
| 73 | 'content-type': new Headers(requestParams.headers).get('Content-Type') ?? 'application/json', |
| 74 | }, |
| 75 | } |
| 76 | } |
| 77 | } |
| 78 | |
| 79 | // params 参数处理 |
| 80 | let params: string | null = null |
| 81 | if (requestParams.params) { |
| 82 | params = this._stringifySearchParams(requestParams.params) |
| 83 | } |
| 84 | |
| 85 | const res = await fetch(params ? `${fetchURL}?${params}` : fetchURL, { |
| 86 | ...requestParams, |
| 87 | }) |
| 88 | |
| 89 | if (this.responseInterceptor) { |
| 90 | return resolve(this.responseInterceptor(res)) |
| 91 | } |
| 92 | |
| 93 | resolve(res as T) |
| 94 | }) |
| 95 | } |
| 96 | } |
| 97 | |
| 98 | export default FetchService |
| 99 |