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- import fetch from 'dva/fetch';
- import { stringify } from 'qs';
- import { message, notification } from 'antd';
- // HTTP响应状态码
- const httpCodeMessage = {
- 200: '服务器成功返回请求的数据',
- 201: '新建或修改数据成功。',
- 202: '一个请求已经进入后台排队(异步任务)',
- 204: '删除数据成功。',
- 400: '发出的请求有错误,服务器没有进行新建或修改数据,的操作。',
- 401: '用户没有权限(令牌、用户名、密码错误)。',
- 403: '用户得到授权,但是访问是被禁止的。',
- 404: '发出的请求针对的是不存在的记录,服务器没有进行操作',
- 406: '请求的格式不可得。',
- 410: '请求的资源被永久删除,且不会再得到的。',
- 422: '当创建一个对象时,发生一个验证错误。',
- 500: '服务器发生错误,请检查服务器',
- 502: '网关错误',
- 503: '服务不可用,服务器暂时过载或维护',
- 504: '网关超时',
- };
- // 自定义响应状态码
- const customCodeMessage = {
- 10004: 'Token认证失败',
- 800 : '数据不存在',
- };
- /**
- * 检查HTTP响应状态码,>=200 && < 300正常
- */
- function httpErrorHandler(response) {
- if (response.status >= 200 && response.status < 300) {
- return response;
- }
- const errortext = httpCodeMessage[response.status] || response.statusText;
- notification.error({
- message: `HTTP错误 ${response.status}: ${response.url}`,
- description: errortext,
- });
- const error = new Error(errortext);
- error.response = response;
- throw error;
- return { error };
- }
- /**
- * @desc 拦截接口返回的数据状态,提示错误内容
- * @return {[object]} { res: data }
- */
- function apiErrorHandler(data) {
- if (!data.success) {
- const errortext = customCodeMessage[data.code] || data.message;
- // Token认证失败,错误继续外抛,让全局app对象捕获,跳转到登录界面
- if (data.code === 10004) {
- const error = new Error(errortext);
- error.response = data;
- throw error;
- } else {
- message.error(`请求错误 错误代码:${data.code} 错误信息:${errortext}`);
- }
- }
- return data;
- }
- /**
- * @desc 处理未预知到的网络错误
- * @return {[object]} {error}
- */
- function unpredictableErrorHandler(error) {
- if (!error.response) {
- console.error(error);
- message.error('出现未知的网络问题,请检查日志或联系管理员');
- }
- if (error.response && error.response.code === 10004) {
- throw error;
- }
- return { error };
- };
- /**
- * @desc 处理请求超时错误
- * @return {[object]} {error}
- */
- function timeoutErrorHandler(error) {
- // 这里只会捕获两种错误,一是超时错误,一是认证失效错误,认证失效错误继续外抛
- if (!error.response) {
- message.error('请求超时,请检查网络状态是否可用!');
- }
- else if (error && error.response.code === 10004) {
- throw error;
- }
- return { error };
- }
- /**
- * response为promise对象,转换为json
- */
- function promise2Json(response) {
- return response.json();
- }
- /**
- * fetch api不支持超时设置,进行浅度加工,变相实现超时设定
- */
- function _fetch(requestPromise, timeout=8000) {
- let timeoutAction = null;
- const timerPromise = new Promise((resolve, reject) => {
- timeoutAction = () => { reject() }
- });
- setTimeout(() => { timeoutAction() }, timeout);
- return Promise.race([requestPromise,timerPromise]);
- };
- /**
- * Requests a URL, returning an object or none.
- *
- * @param {string} url The URL we want to request
- * @param {object} [options] The options we want to pass to "fetch"
- * @return {object} An object containing either "data" or "err"
- */
- export default function request(url, options) {
- const defaultOptions = {
- credentials: 'include', // with cookies(Post CORS requests)
- };
- const newOptions = { ...defaultOptions, ...options };
- newOptions.method = (newOptions.method || 'GET').toUpperCase();
- if (newOptions.method === 'POST' || newOptions.method === 'PUT' ||
- newOptions.method === 'PATCH' || newOptions.method === 'DELETE') {
- newOptions.headers = {
- 'Accept': 'application/json',
- 'Content-Type': 'application/json; charset=utf-8',
- ...newOptions.headers,
- };
- }
- else {
- newOptions.headers = {
- 'Accept': 'application/json',
- ...newOptions.headers,
- }
- }
- const originRequest = fetch(url, newOptions)
- .then(httpErrorHandler)
- .then(promise2Json)
- .then(apiErrorHandler)
- .catch(unpredictableErrorHandler)
- return _fetch(originRequest).catch(timeoutErrorHandler);
- }
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