最近有个特殊需求，由于路由器PCB板子是办公类型，无线传输类型，在特定情况下没有网络支持。则桌面应用程序里面的远程升级路由器功能无法使用，则就需要将OTA升级降至本地通过局域网的HTTP请求去实现。

1.下载代码

        Downloads(url){var that = this;var http = require('http');var fs = window.require('fs');http.get(url, (res) => { var localFirmwareUrl = process.env.NODE_ENV == "development"? __dirname.split("node_modules")[0]+"build/NewFirmware":__dirname.split("Tools")[0]+"Services/Services";if (res.statusCode !== "200") {const file = fs.createWriteStream(localFirmwareUrl)// 进度const len = parseInt(res.headers['content-length']);// 文件总长度let cur = 0;res.on('data', function (chunk) {cur += chunk.length;const progress = (100.0 * cur / len).toFixed(2);// 当前进度const currProgress = (cur / 1048576).toFixed(2);// 当前了多少// console.log(progress);// console.log(currProgress + "M");that.Download.len = progress/5;document.getElementById("restart_step").style.cssText += "width: " + progress/5 + "%;";})//下载结束res.on('end', () => {})//文件写入结束file.on('finish', () => {file.close();that.File_Upload();}).on('error', (err) => {fs.unlink(localFirmwareUrl,(e)=>{console.log(e)});if (err) {console.log(err);}})res.pipe(file);} else {console.log("网络环境错误!");ipcRenderer.sendSync('message', JSON.stringify({command: "notification",title: that.$t("notification.title_2"),body: that.$t("notification.body_27")}));}})},

2.将文件封装成formData

BufConvertFile(url, filename) {var fs = window.require('fs');console.log(url)return new Promise((resolv, reject) => {fs.readFile(url, (err, data) => {if (err) {return}const blob = new Blob([data], { type: 'text/plain' });const file = new File([blob], filename, { type: 'text/plain' });resolv(file);})})
}File_Upload(){var { BufConvertFile } = require('../../utils/util');var url = process.env.NODE_ENV == "development"? __dirname.split("node_modules")[0]+"build/NewFirmware":__dirname.split("Tools")[0]+"Services/NewFirmware";BufConvertFile(url, "NewFirmware").then(res=>{var formData = new FormData();formData.append('file', res);this.$axios_post(this.$store.state.content.device_service_ip + this.$axios_url_upload + "?req=" + this.$encrypt("sid=" + this.$store.state.content.session_id), formData).then(res=>{if(res.status==200){this.Resume();}else{ipcRenderer.sendSync('message', JSON.stringify({command: "notification",title: that.$t("notification.title_2"),body: that.$t("notification.body_26")}));}})})},

3.下载进度条

//HTML
<div id="restart_step" style="position: relative; top: -10px; width: 0%; height: 10px; background: #226FE3; border-radius: 6px;"></div>Resume(){this.Download.len == 20;var stop = setInterval(() => {if (this.Download.len >= 100) {clearInterval(stop);this.$emit("closed_ota", false);this.reconnect(this.action_info.ssid,this.action_info.title);} else {this.Download.len += 2;document.getElementById("restart_step").style.cssText += "width: " + this.Download.len + "%;";}}, 1000);
},