400 lines
9.9 KiB
JavaScript
400 lines
9.9 KiB
JavaScript
export class LsjFile {
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constructor(data) {
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this.dom = null;
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// files.type = waiting（等待上传）|| loading（上传中）|| success（成功） || fail（失败）
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this.files = new Map();
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this.debug = data.debug || false;
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this.id = data.id;
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this.width = data.width;
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this.height = data.height;
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this.option = data.option;
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this.instantly = data.instantly;
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this.prohibited = data.prohibited;
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this.onchange = data.onchange;
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this.onprogress = data.onprogress;
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this.uploadHandle = this._uploadHandle;
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// #ifdef MP-WEIXIN
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this.uploadHandle = this._uploadHandleWX;
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// #endif
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}
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/**
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* 创建File节点
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* @param {string}path webview地址
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*/
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create(path) {
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if (!this.dom) {
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// #ifdef H5
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let dom = document.createElement('input');
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dom.type = 'file'
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dom.value = ''
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dom.style.height = this.height
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dom.style.width = this.width
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dom.style.position = 'absolute'
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dom.style.top = 0
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dom.style.left = 0
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dom.style.right = 0
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dom.style.bottom = 0
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dom.style.opacity = 0
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dom.style.zIndex = 999
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dom.accept = this.prohibited.accept;
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if (this.prohibited.multiple) {
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dom.multiple = 'multiple';
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}
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dom.onchange = event => {
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for (let file of event.target.files) {
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if (this.files.size >= this.prohibited.count) {
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this.toast(`只允许上传${this.prohibited.count}个文件`);
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this.dom.value = '';
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break;
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}
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this.addFile(file);
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}
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this._uploadAfter();
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this.dom.value = '';
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};
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this.dom = dom;
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// #endif
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// #ifdef APP-PLUS
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let styles = {
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top: '-200px',
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left: 0,
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width: '1px',
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height: '200px',
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background: 'transparent'
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};
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let extras = {
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debug: this.debug,
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instantly: this.instantly,
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prohibited: this.prohibited,
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}
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this.dom = plus.webview.create(path, this.id, styles,extras);
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this.setData(this.option);
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this._overrideUrlLoading();
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// #endif
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return this.dom;
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}
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}
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/**
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* 设置上传参数
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* @param {object|string}name 上传参数,支持a.b 和 a[b]
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*/
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setData() {
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let [name,value = ''] = arguments;
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if (typeof name === 'object') {
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Object.assign(this.option,name);
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}
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else {
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this._setValue(this.option,name,value);
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}
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this.debug&&console.log(JSON.stringify(this.option));
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// #ifdef APP-PLUS
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this.dom.evalJS(`vm.setData('${JSON.stringify(this.option)}')`);
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// #endif
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}
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/**
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* 上传
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* @param {string}name 文件名称
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*/
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async upload(name='') {
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if (!this.option.url) {
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throw Error('未设置上传地址');
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}
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// #ifndef APP-PLUS
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if (name && this.files.has(name)) {
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await this.uploadHandle(this.files.get(name));
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}
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else {
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for (let item of this.files.values()) {
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if (item.type === 'waiting' || item.type === 'fail') {
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await this.uploadHandle(item);
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}
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}
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}
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// #endif
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// #ifdef APP-PLUS
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this.dom&&this.dom.evalJS(`vm.upload('${name}')`);
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// #endif
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}
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// 选择文件change
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addFile(file,isCallChange) {
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let name = file.name;
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this.debug&&console.log('文件名称',name,'大小',file.size);
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if (file) {
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// 限制文件格式
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let path = '';
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let suffix = name.substring(name.lastIndexOf(".")+1).toLowerCase();
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let formats = this.prohibited.formats.toLowerCase();
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// #ifndef MP-WEIXIN
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path = URL.createObjectURL(file);
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// #endif
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// #ifdef MP-WEIXIN
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path = file.path;
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// #endif
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if (formats&&!formats.includes(suffix)) {
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this.toast(`不支持上传${suffix.toUpperCase()}格式文件`);
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return false;
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}
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// 限制文件大小
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if (file.size > 1024 * 1024 * Math.abs(this.prohibited.size)) {
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this.toast(`附件大小请勿超过${this.prohibited.size}M`)
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return false;
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}
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this.files.set(file.name,{file,path,name: file.name,size: file.size,progress: 0,type: 'waiting'});
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return true;
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}
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}
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/**
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* 移除文件
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* @param {string}name 不传name默认移除所有文件，传入name移除指定name的文件
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*/
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clear(name='') {
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// #ifdef APP-PLUS
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this.dom&&this.dom.evalJS(`vm.clear('${name}')`);
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// #endif
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if (!name) {
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this.files.clear();
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}
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else {
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this.files.delete(name);
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}
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return this.onchange(this.files);
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}
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/**
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* 提示框
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* @param {string}msg 轻提示内容
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*/
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toast(msg) {
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uni.showToast({
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title: msg,
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icon: 'none'
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});
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}
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/**
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* 微信小程序选择文件
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* @param {number}count 可选择文件数量
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*/
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chooseMessageFile(type,count) {
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wx.chooseMessageFile({
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count: count,
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type: type,
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success: ({ tempFiles }) => {
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for (let file of tempFiles) {
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this.addFile(file);
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}
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this._uploadAfter();
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},
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fail: () => {
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this.toast(`打开失败`);
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}
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})
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}
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_copyObject(obj) {
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if (typeof obj !== "undefined") {
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return JSON.parse(JSON.stringify(obj));
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} else {
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return obj;
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}
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}
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/**
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* 自动根据字符串路径设置对象中的值 支持.和[]
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* @param {Object} dataObj 数据源
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* @param {String} name 支持a.b 和 a[b]
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* @param {String} value 值
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* setValue(dataObj, name, value);
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*/
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_setValue(dataObj, name, value) {
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// 通过正则表达式 查找路径数据
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let dataValue;
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if (typeof value === "object") {
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dataValue = this._copyObject(value);
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} else {
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dataValue = value;
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}
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let regExp = new RegExp("([\\w$]+)|\\[(:\\d)\\]", "g");
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const patten = name.match(regExp);
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// 遍历路径 逐级查找 最后一级用于直接赋值
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for (let i = 0; i < patten.length - 1; i++) {
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let keyName = patten[i];
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if (typeof dataObj[keyName] !== "object") dataObj[keyName] = {};
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dataObj = dataObj[keyName];
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}
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// 最后一级
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dataObj[patten[patten.length - 1]] = dataValue;
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this.debug&&console.log('参数更新后',JSON.stringify(this.option));
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}
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_uploadAfter() {
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this.onchange(this.files);
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setTimeout(()=>{
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this.instantly&&this.upload();
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},1000)
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}
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_overrideUrlLoading() {
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this.dom.overrideUrlLoading({ mode: 'reject' }, e => {
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let {retype,item,files,end} = this._getRequest(
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e.url
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);
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let _this = this;
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switch (retype) {
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case 'updateOption':
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this.dom.evalJS(`vm.setData('${JSON.stringify(_this.option)}')`);
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break
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case 'change':
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try {
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_this.files = new Map([..._this.files,...JSON.parse(unescape(files))]);
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} catch (e) {
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return console.error('出错了，请检查代码')
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}
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_this.onchange(_this.files);
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break
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case 'progress':
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try {
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item = JSON.parse(unescape(item));
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} catch (e) {
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return console.error('出错了，请检查代码')
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}
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_this._changeFilesItem(item,end);
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break
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default:
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break
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}
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})
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}
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_getRequest(url) {
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let theRequest = new Object()
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let index = url.indexOf('?')
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if (index != -1) {
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let str = url.substring(index + 1)
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let strs = str.split('&')
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for (let i = 0; i < strs.length; i++) {
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theRequest[strs[i].split('=')[0]] = unescape(strs[i].split('=')[1])
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}
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}
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return theRequest
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}
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_changeFilesItem(item,end=false) {
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this.debug&&console.log('onprogress',JSON.stringify(item));
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this.onprogress(item,end);
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this.files.set(item.name,item);
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}
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_uploadHandle(item) {
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item.type = 'loading';
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delete item.responseText;
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return new Promise((resolve,reject)=>{
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this.debug&&console.log('option',JSON.stringify(this.option));
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let {url,name,method='POST',header,formData} = this.option;
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let form = new FormData();
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for (let keys in formData) {
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form.append(keys, formData[keys])
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}
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form.append(name, item.file);
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let xmlRequest = new XMLHttpRequest();
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xmlRequest.open(method, url, true);
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for (let keys in header) {
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xmlRequest.setRequestHeader(keys, header[keys])
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}
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xmlRequest.upload.addEventListener(
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'progress',
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event => {
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if (event.lengthComputable) {
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let progress = Math.ceil((event.loaded * 100) / event.total)
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if (progress <= 100) {
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item.progress = progress;
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this._changeFilesItem(item);
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}
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}
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},
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false
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);
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xmlRequest.ontimeout = () => {
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console.error('请求超时')
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item.type = 'fail';
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this._changeFilesItem(item,true);
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return resolve(false);
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}
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xmlRequest.onreadystatechange = ev => {
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if (xmlRequest.readyState == 4) {
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if (xmlRequest.status == 200) {
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this.debug&&console.log('上传完成：' + xmlRequest.responseText)
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item['responseText'] = xmlRequest.responseText;
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item.type = 'success';
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this._changeFilesItem(item,true);
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return resolve(true);
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} else if (xmlRequest.status == 0) {
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console.error('status = 0 :请检查请求头Content-Type与服务端是否匹配，服务端已正确开启跨域，并且nginx未拦截阻止请求')
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}
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console.error('--ERROR--：status = ' + xmlRequest.status)
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item.type = 'fail';
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this._changeFilesItem(item,true);
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return resolve(false);
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}
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}
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xmlRequest.send(form)
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});
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}
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_uploadHandleWX(item) {
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item.type = 'loading';
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delete item.responseText;
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return new Promise((resolve,reject)=>{
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this.debug&&console.log('option',JSON.stringify(this.option));
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let form = {filePath: item.file.path,...this.option };
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form['fail'] = ({ errMsg = '' }) => {
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console.error('--ERROR--：' + errMsg)
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item.type = 'fail';
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this._changeFilesItem(item,true);
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return resolve(false);
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}
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form['success'] = res => {
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if (res.statusCode == 200) {
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this.debug&&console.log('上传完成,微信端返回不一定是字符串，根据接口返回格式判断是否需要JSON.parse：' + res.data)
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item['responseText'] = res.data;
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item.type = 'success';
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this._changeFilesItem(item,true);
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return resolve(true);
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}
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item.type = 'fail';
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this._changeFilesItem(item,true);
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return resolve(false);
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}
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let xmlRequest = uni.uploadFile(form);
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xmlRequest.onProgressUpdate(({ progress = 0 }) => {
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if (progress <= 100) {
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item.progress = progress;
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this._changeFilesItem(item);
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}
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})
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});
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}
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} |