四端上传
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/**
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* 统一请求层与接口封装。
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*
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* 替代旧版本「每个接口手写一遍 wx.request + Promise」的写法。
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* 职责：
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* - 自动附带 Authorization
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* - 统一解包 { code, message, data, requestId }
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* - token 失效自动刷新，刷新失败自动重新登录
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*/
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const config = require('../config/index');
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const store = require('./store');
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/** 进行中的刷新，避免并发 401 触发多次刷新 */
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let refreshing = null;
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function staticUrl(path) {
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if (!path) return '';
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if (/^https?:\/\//i.test(path)) return path;
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return config.STATIC_BASE_URL.replace(/\/+$/, '') + '/' + String(path).replace(/^\/+/, '');
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}
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function normalizeError(body, statusCode) {
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if (body && typeof body.code === 'number') {
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return { code: body.code, message: body.message || '请求失败', requestId: body.requestId };
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}
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return { code: -1, message: '服务异常（' + statusCode + '）' };
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}
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/** 底层请求。不做鉴权重试，返回完整响应体。 */
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function rawRequest(options) {
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const header = { 'content-type': 'application/json' };
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if (options.auth !== false) {
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const token = store.getToken();
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if (token) header.Authorization = 'Bearer ' + token;
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}
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return new Promise((resolve, reject) => {
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wx.request({
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url: config.API_BASE_URL.replace(/\/+$/, '') + options.url,
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method: options.method || 'GET',
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data: options.data,
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header,
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timeout: config.TIMEOUT,
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success(res) {
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resolve({ statusCode: res.statusCode, body: res.data || {} });
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},
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fail() {
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reject({ code: -1, message: '网络异常，请检查网络后重试' });
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},
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});
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});
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}
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/** 带鉴权的请求。token 失效时刷新一次并重试。 */
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function request(options) {
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return rawRequest(options).then(({ statusCode, body }) => {
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if (body.code === 0) return body.data;
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const needLogin = statusCode === 401 || body.code === 2000 || body.code === 2001;
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if (needLogin && options.auth !== false && options.retried !== true) {
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return refreshAccessToken()
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.then(() => request(Object.assign({}, options, { retried: true })))
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.catch(() => {
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store.reset();
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throw { code: 2000, message: '登录已过期，请重新进入小程序' };
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});
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}
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throw normalizeError(body, statusCode);
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});
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}
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function refreshAccessToken() {
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if (refreshing) return refreshing;
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const refreshToken = store.getRefreshToken();
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if (!refreshToken) return Promise.reject({ code: 2000, message: '未登录' });
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refreshing = rawRequest({
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url: '/v1/auth/refresh',
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method: 'POST',
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data: { refreshToken },
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auth: false,
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})
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.then(({ body }) => {
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if (body.code !== 0) throw { code: 2000, message: '登录已过期' };
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store.setTokens(body.data.accessToken);
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return body.data.accessToken;
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})
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.finally(() => {
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refreshing = null;
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});
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return refreshing;
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}
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// ── 登录 ──────────────────────────────────────────────────────────────────
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/** wx.login 换 code，再用 code 换服务端 token。 */
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function login() {
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return new Promise((resolve, reject) => {
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wx.login({
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success(res) {
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if (!res.code) {
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reject({ code: 3002, message: '微信登录失败，请重试' });
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return;
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}
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request({
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url: '/v1/auth/wx-login',
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method: 'POST',
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data: { code: res.code },
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auth: false,
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})
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.then((data) => {
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store.setTokens(data.accessToken, data.refreshToken);
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store.setUser(data.user);
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resolve(data);
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})
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.catch(reject);
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},
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fail() {
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reject({ code: 3002, message: '微信登录失败，请重试' });
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},
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});
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});
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}
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function logout() {
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return request({ url: '/v1/auth/logout', method: 'POST' }).catch(() => null).then(() => {
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store.reset();
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});
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}
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// ── 首页内容 ──────────────────────────────────────────────────────────────
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const api = {
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staticUrl,
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login,
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logout,
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getConfig: () => request({ url: '/v1/config', auth: false }),
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getBanners: () => request({ url: '/v1/banners', auth: false }),
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getHomeCourses: () => request({ url: '/v1/home/courses', auth: false }),
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getHomeFreeCourses: () => request({ url: '/v1/home/free-courses', auth: false }),
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getArticles: (page, pageSize) =>
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request({ url: '/v1/articles?page=' + (page || 1) + '&pageSize=' + (pageSize || 10), auth: false }),
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getArticle: (id) => request({ url: '/v1/articles/' + id, auth: false }),
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getTips: () => request({ url: '/v1/tips', auth: false }),
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// ── 课程 ────────────────────────────────────────────────────────────
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getCourses: () => request({ url: '/v1/courses' }),
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getCourse: (code) => request({ url: '/v1/courses/' + code }),
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getLessons: (code) => request({ url: '/v1/courses/' + code + '/lessons' }),
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getPlayUrl: (code, chapterId, playId) =>
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request({
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url:
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'/v1/courses/' +
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code +
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'/play?chapterId=' +
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encodeURIComponent(chapterId) +
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'&playId=' +
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encodeURIComponent(playId),
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}),
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getFreeLessons: (seriesNo) =>
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request({ url: '/v1/free-lessons' + (seriesNo === undefined ? '' : '?seriesNo=' + seriesNo), auth: false }),
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// ── 用户 ────────────────────────────────────────────────────────────
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getMe: () => request({ url: '/v1/me' }),
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updateMe: (payload) => request({ url: '/v1/me', method: 'PATCH', data: payload }),
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getEntitlements: () => request({ url: '/v1/me/entitlements' }),
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// ── 订单与支付 ──────────────────────────────────────────────────────
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createOrder: (courseCode) =>
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request({ url: '/v1/orders', method: 'POST', data: { courseCode: courseCode } }),
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getOrder: (outTradeNo) => request({ url: '/v1/orders/' + outTradeNo }),
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};
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/**
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* 拉起虚拟支付。
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*
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* 支付成功只代表「钱付了」，权益由服务端收到发货推送后发放，
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* 因此这里不直接开通课程，而是让调用方轮询订单状态。
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*/
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function requestVirtualPayment(payData) {
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return new Promise((resolve, reject) => {
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wx.requestVirtualPayment({
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signData: payData.signData,
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mode: payData.mode,
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paySig: payData.paySig,
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signature: payData.signature,
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success: resolve,
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fail: reject,
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});
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});
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}
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module.exports = Object.assign(api, { requestVirtualPayment });
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