网站建设毕业设计 任务书,做网站的公司找客户,2345官网,直播网站排名我们使用electron下载文件时#xff0c;会发现不像浏览器一样会有地方展示下载进度#xff0c;这导致下载一些大文件时不知道下载进度到哪里了
下面我们通过electron提供的will-download监听和element-plus中的ElNotification和ElProgress组件实现这一功能
实现逻辑
触发…我们使用electron下载文件时会发现不像浏览器一样会有地方展示下载进度这导致下载一些大文件时不知道下载进度到哪里了
下面我们通过electron提供的will-download监听和element-plus中的ElNotification和ElProgress组件实现这一功能
实现逻辑
触发下载文件这一操作监听下载开始、下载进度、下载结束根据监听内容操作vnode展示加载进度
1、触发下载文件这一操作
使用electron中ipcMain模块接受页面中发送来的指令
// main.js 部分代码 通过这个打开****.vue界面
var win new BrowserWindow();
// download.js 部分代码
const { ipcMain, dialog } require(electron)
let filePath ;// 监听渲染进程发出的download事件
const webContents win.webContents;ipcMain.on(download, (evt, args) {const fileArr args.split(/);let ext path.extname(args)let filters [{ name: 全部文件, extensions: [*] }]if (ext ext ! .) {filters.unshift({name: ,extensions: [ext.match(/[a-zA-Z]$/)[0]]})}dialog.showSaveDialog(win, {filters,defaultPath:args}).then( res {if(res.filePath){filePath res.filePathwebContents.downloadURL(args) // 注意这里必须是下载文件可访问路径。而不是存储路径}})})// vue页面中的逻辑 ***.vueimport { ipcRenderer } from electron// 触发var url 下载地址.***ipcRenderer.send(download, url)执行完上面的代码会弹窗另存为下载会发现下载没有显示进度的地方
2、监听下载开始、下载进度、下载结束
监听webContents中的will-download事件会返回下载相关的一些信息这里把下载过程中的一些状态和用到的一些参数发送给webContents中打开的页面
// download.js 部分代码webContents.session.on(will-download, (event, item, webContents) {item.setSavePath(filePath) // 这里是存储路径或者存储文件名称var filName path.basename(filePath)win.webContents.send(win-will-download,{type:start,params:{filName}})item.on(updated, (event, state) {if (state interrupted) {console.log(Download is interrupted but can be resumed)} else if (state progressing) {if (item.isPaused()) {console.log(Download is paused)} else {win.webContents.send(win-will-download,{type:progress,params:{totalBytes:item.getTotalBytes(),receivedBytes:item.getReceivedBytes()}})}}})item.once(done, (event, state) {if (state completed) {win.webContents.send(win-will-download,{type:completed})console.log(Download successfully)} else {console.log(Download failed: ${state})}})})// ***.vue//download是展示下载进度的组件下面会有相应的代码 这里通过ref创建响应数据 vue2的话可以通过 Vue.observable API进行创建
import download from /components/download/index.vue
import { ElNotification } from element-plus
import { h, ref } from vue
var totalBytes ref(0)
var receivedBytes ref(0)mounted(){ipcRenderer.removeAllListeners(win-will-download)ipcRenderer.on(win-will-download, this.winDownLoadFun)},methods:{winDownLoadFun(event, data) {if (data.type start) {this.notice this.notice.close this.notice.close()var progress h(download, {totalBytes: totalBytes,receivedBytes: receivedBytes,filName: data.params.filName,onClose: () {totalBytes.value 0receivedBytes.value 0this.notice this.notice.close this.notice.close()}})this.notice ElNotification({title: 下载进度,position: bottom-right,duration: 0,showClose: false,message: progress,onClose: () {this.notice null}})}else if (data.type progress) {totalBytes.value data.params.totalBytesreceivedBytes.value data.params.receivedBytes} else if (data.type completed) {receivedBytes.value totalBytes.value}},} 3、根据监听内容操作vnode展示加载进度
下面是download/index.vue完整文件
templatediv stylewidth: 100%;divdiv click$emit(close) v-ifpercentage 100 styleposition: absolute;top: 15px;right: 15px;cursor: pointer;关闭/divdiv classtask-itemimg classimg src/assets/image/zip-1.png/imgdiv classnamediv{{filName}}/divdiv classprogress1{{limitFormat(receivedBytes.value)}}/{{limitFormat(totalBytes.value)}}/div/div/divdivel-progress :show-textfalse :percentagepercentage //div/div/div
/templatescript
import { ElMessage, ElProgress } from element-plus
import { ref } from vue
export default {name: download,props: {filName:{type:String,default:},totalBytes: {default() {return ref(0)}},receivedBytes: {default() {return ref(0)}}},computed:{percentage(){return parseFloat((((this.receivedBytes.value / this.totalBytes.value) ||0 )* 100).toFixed(2)) }},watch:{percentage(){if(this.percentage 100 this.totalBytes.value ! 0){ElMessage({message:下载完成,type:success})}},},methods: {limitFormat(limit) {var size ;if (limit 0.1 * 1024) { //小于0.1KB则转化成Bsize limit.toFixed(2) B} else if (limit 0.1 * 1024 * 1024) { //小于0.1MB则转化成KBsize (limit / 1024).toFixed(2) KB} else if (limit 0.1 * 1024 * 1024 * 1024) { //小于0.1GB则转化成MBsize (limit / (1024 * 1024)).toFixed(2) MB} else { //其他转化成GBsize (limit / (1024 * 1024 * 1024)).toFixed(2) GB}var sizeStr size ; //转成字符串var index sizeStr.indexOf(.); //获取小数点处的索引var dou sizeStr.substr(index 1, 2) //获取小数点后两位的值if (dou 00) { //判断后两位是否为00如果是则删除00return sizeStr.substring(0, index) sizeStr.substr(index 3, 2)}return size;}},}
/scriptstyle scoped
.task-item {width: 280px;display: flex;align-items: center;margin-bottom: 6px;
}.progress1 {font-size: 12px;margin-top: -4px;color: #999;
}.task-item i {}.img {width: 32px;height: 32px;display: block;margin-right: 14px;}
/styledownload.js完整代码
const { ipcMain, dialog, shell } require(electron)
const path require(path)
const fs require(fs);
const { type } require(os);
exports.initDownload function (win) {let filePath ;// 监听渲染进程发出的download事件const webContents win.webContents;ipcMain.on(download, (evt, args) {const fileArr args.split(/);let ext path.extname(args)let filters [{ name: 全部文件, extensions: [*] }]if (ext ext ! .) {filters.unshift({name: ,extensions: [ext.match(/[a-zA-Z]$/)[0]]})}dialog.showSaveDialog(win, {filters,defaultPath:args}).then( res {if(res.filePath){filePath res.filePathwebContents.downloadURL(args) // 注意这里必须是下载文件可访问路径。而不是存储路径}})})webContents.session.on(will-download, (event, item, webContents) {item.setSavePath(filePath) // 这里是存储路径或者存储文件名称var filName path.basename(filePath)win.webContents.send(win-will-download,{type:start,params:{filName}})item.on(updated, (event, state) {if (state interrupted) {console.log(Download is interrupted but can be resumed)} else if (state progressing) {if (item.isPaused()) {console.log(Download is paused)} else {win.webContents.send(win-will-download,{type:progress,params:{totalBytes:item.getTotalBytes(),receivedBytes:item.getReceivedBytes()}})}}})item.once(done, (event, state) {if (state completed) {win.webContents.send(win-will-download,{type:completed})console.log(Download successfully)} else {console.log(Download failed: ${state})}})})
}
main.js中使用代码 这里的main.js是electron的主进程文件不是vue相关的问题
const { BrowserWindow } require(electron);
const {initDownload} require(/utils/download.js)
var win null;
async function createWindow() {win new BrowserWindow({// 创建相关的参数});// 为创建的win窗口绑定下载事件initDownload(win)
}
createWindow()
