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170 lines
5.6 KiB
170 lines
5.6 KiB
3 years ago
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import deepMerge from "../function/deepMerge";
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import validate from "../function/test";
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class Request {
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// 设置全局默认配置
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setConfig(customConfig) {
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// 深度合并对象,否则会造成对象深层属性丢失
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this.config = deepMerge(this.config, customConfig);
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}
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// 主要请求部分
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request(options = {}) {
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// 检查请求拦截
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if (this.interceptor.request && typeof this.interceptor.request === 'function') {
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let tmpConfig = {};
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let interceptorRequest = this.interceptor.request(options);
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if (interceptorRequest === false) {
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// 返回一个处于pending状态中的Promise,来取消原promise,避免进入then()回调
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return new Promise(()=>{});
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}
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this.options = interceptorRequest;
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}
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options.dataType = options.dataType || this.config.dataType;
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options.responseType = options.responseType || this.config.responseType;
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options.url = options.url || '';
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options.params = options.params || {};
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options.header = Object.assign({}, this.config.header, options.header);
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options.method = options.method || this.config.method;
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return new Promise((resolve, reject) => {
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options.complete = (response) => {
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// 请求返回后,隐藏loading(如果请求返回快的话,可能会没有loading)
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uni.hideLoading();
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// 清除定时器,如果请求回来了,就无需loading
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clearTimeout(this.config.timer);
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this.config.timer = null;
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// 判断用户对拦截返回数据的要求,如果originalData为true,返回所有的数据(response)到拦截器,否则只返回response.data
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if(this.config.originalData) {
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// 判断是否存在拦截器
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if (this.interceptor.response && typeof this.interceptor.response === 'function') {
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let resInterceptors = this.interceptor.response(response);
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// 如果拦截器不返回false,就将拦截器返回的内容给this.$u.post的then回调
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if (resInterceptors !== false) {
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resolve(resInterceptors);
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} else {
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// 如果拦截器返回false,意味着拦截器定义者认为返回有问题,直接接入catch回调
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reject(response);
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}
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} else {
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// 如果要求返回原始数据,就算没有拦截器,也返回最原始的数据
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resolve(response);
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}
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} else {
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if (response.statusCode == 200) {
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if (this.interceptor.response && typeof this.interceptor.response === 'function') {
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let resInterceptors = this.interceptor.response(response.data);
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if (resInterceptors !== false) {
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resolve(resInterceptors);
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} else {
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reject(response.data);
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}
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} else {
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// 如果不是返回原始数据(originalData=false),且没有拦截器的情况下,返回纯数据给then回调
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resolve(response.data);
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}
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} else {
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// 不返回原始数据的情况下,服务器状态码不为200,modal弹框提示
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// if(response.errMsg) {
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// uni.showModal({
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// title: response.errMsg
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// });
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// }
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reject(response)
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}
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}
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}
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// 判断用户传递的URL是否/开头,如果不是,加上/,这里使用了uView的test.js验证库的url()方法
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options.url = validate.url(options.url) ? options.url : (this.config.baseUrl + (options.url.indexOf('/') == 0 ?
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options.url : '/' + options.url));
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// 是否显示loading
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// 加一个是否已有timer定时器的判断,否则有两个同时请求的时候,后者会清除前者的定时器id
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// 而没有清除前者的定时器,导致前者超时,一直显示loading
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if(this.config.showLoading && !this.config.timer) {
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this.config.timer = setTimeout(() => {
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uni.showLoading({
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title: this.config.loadingText,
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mask: this.config.loadingMask
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})
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this.config.timer = null;
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}, this.config.loadingTime);
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}
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uni.request(options);
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})
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// .catch(res => {
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// // 如果返回reject(),不让其进入this.$u.post().then().catch()后面的catct()
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// // 因为很多人都会忘了写后面的catch(),导致报错捕获不到catch
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// return new Promise(()=>{});
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// })
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}
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constructor() {
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this.config = {
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baseUrl: '', // 请求的根域名
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// 默认的请求头
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header: {},
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method: 'POST',
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// 设置为json,返回后uni.request会对数据进行一次JSON.parse
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dataType: 'json',
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// 此参数无需处理,因为5+和支付宝小程序不支持,默认为text即可
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responseType: 'text',
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showLoading: true, // 是否显示请求中的loading
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loadingText: '请求中...',
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loadingTime: 800, // 在此时间内,请求还没回来的话,就显示加载中动画,单位ms
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timer: null, // 定时器
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originalData: false, // 是否在拦截器中返回服务端的原始数据,见文档说明
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loadingMask: true, // 展示loading的时候,是否给一个透明的蒙层,防止触摸穿透
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}
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// 拦截器
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this.interceptor = {
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// 请求前的拦截
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request: null,
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// 请求后的拦截
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response: null
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}
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// get请求
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this.get = (url, data = {}, header = {}) => {
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return this.request({
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method: 'GET',
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url,
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header,
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data
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})
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}
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// post请求
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this.post = (url, data = {}, header = {}) => {
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return this.request({
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url,
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method: 'POST',
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header,
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data
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})
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}
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// put请求,不支持支付宝小程序(HX2.6.15)
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this.put = (url, data = {}, header = {}) => {
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return this.request({
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url,
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method: 'PUT',
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header,
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data
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})
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}
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// delete请求,不支持支付宝和头条小程序(HX2.6.15)
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this.delete = (url, data = {}, header = {}) => {
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return this.request({
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url,
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method: 'DELETE',
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header,
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data
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})
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}
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}
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}
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export default new Request
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