写到一半 我点击上传图片 卡死我了浏览器都卡死  果断截了图  将就看着吧 难得写了

示例代码：

const fs = require("fs");

const _path = require('path');

const proc = require('child_process');

class Util {

constructor() {

this.port = 3000;

this.wPort = 3001;

}

$getConfig(key) {

let reslut = fs.readFileSync(`${__dirname}/config.json`);

if (typeof key == "undefined") {

return JSON.parse(reslut.toString());

} else {

let resluts = JSON.parse(reslut.toString());

return resluts[key];

}

}

$setConfig(data) {

return new Promise((resolve, reject) => {

fs.writeFile(`${__dirname}/config.json`, `${JSON.stringify(data)}`, (err1) => {

if (err1) {

reject({

status: false,

msg: err1

});

return

}

resolve({

status: true,

msg: '写入配置成功'

});

})

})

}

/**

* 获取已经保存在txt文本中的内容

*/

$getTxtData(params) {

return new Promise((resolve, reject) => {

fs.readFile(params.path, (err, data) => {

if (err) {

reject({

status: false,

msg: err

});

return

}

resolve({

status: true,

msg: data.toString()

});

});

})

}

/**

* 获取static文件下所有网址已经转换成的图片

*/

$getStaticIms(needUrls = false) {

let promise1 = new Promise((resolve, reject) => {

if (!needUrls) {

return resolve();

}

let path = _path.resolve(__dirname, '..', 'puppeteer/addressInfo/addressKeyVal.json');

let info = this.$getFilesContents(path)

return resolve(JSON.parse(info));

})

return new Promise((resolve, reject) => {

let path = _path.resolve(__dirname, '..', 'static/serverImages');

fs.readdir(path, (err, files) => {

if (err) {

resolve({

status: false,

msg: err

});

return

}

let list = [];

if (needUrls) {

promise1.then((data) => {

files.forEach((file, index) => {

list.push({

images: `serverImages/${file}`,

url: data[file.match(/\d/g).join('')]

});

})

})

}

resolve({

status: true,

msg: list

});

})

})

}

/**

* 删除指定文件夹下面的指定文件

*/

$removeFiles(obj) {

return new Promise((resolve, reject) => {

fs.readdir(obj.path, (err, files) => {

if (err) {

reject({

status: false,

msg: err

});

return

}

let list = [];

files.forEach((file) => {

if (obj.name == file) {

fs.unlink(`${obj.path}/${file}`, (err1) => {

if (err1) {

reject({

status: false,

msg: err1

});

return

}

resolve({

status: true,

msg: `删除${file}文件成功`

});

});

return

}

})

})

})

}

/**

* 获取指定文件的内容

*/

$getFilesContents(path) {

let reslut = fs.readFileSync(path);

return reslut.toString()

}

/**

* 写入指定文件的内容

*/

$writeFileContent(obj) {

return new Promise((resolve, reject) => {

fs.open(obj.path, obj.flags, (err, data) => {

if (err) {

reject({

status: false,

msg: err

})

return

}

let saveData = obj.data

if (typeof obj.data !== 'string') {

saveData = JSON.stringify(obj.data)

}

fs.writeFile(data, `${saveData}${obj.enter}`, (err1) => {

if (err1) {

reject({

status: false,

msg: err1

});

return

}

resolve({

status: true,

msg: '写入成功'

});

})

})

})

}

/**

* 删除指定目录下的所有文件

*/

$removeAllFiles(obj) {

return new Promise((reslove, reject) => {

if (fs.existsSync(obj.path)) {

fs.readdirSync(obj.path).forEach((file) => {

let curPath = obj.path + "/" + file;

if (fs.statSync(curPath).isDirectory()) { // recurse

deleteFolderRecursive(curPath);

} else { // delete file

fs.unlinkSync(curPath);

}

});

// fs.rmdirSync(obj.path);

}

reslove({

status: true,

msg: `文清空完毕`

})

// fs.mkdir(obj.path, (err1) => {

// if (err1) {

// reject({

// status: false,

// msg: `目录删除成功但是创建失败`

// })

// return

// }

// reslove({

// status: true,

// msg: `目录删除成功`

// })

// })

})

}

/**

* 数组去除重复 并排除空行

* @param {} data

*/

unique(data) {

let newArr = [];

for (let i = 0; i < data.length; i++) {

if (data[i].trim() != '') {

newArr.push(data[i]);

}

}

return Array.from(new Set(newArr));

}

/**

* 输出错误日志

*/

OutputLog() {

console.oldLog = console.log;

console.log = function () {

let logName = new Date().toLocaleDateString();

let path = _path.resolve(__dirname, '..', `logs/${logName}.txt`);

arguments.constructor.prototype.join = Array.prototype.join;

let content=arguments.join('\r\n');

fs.writeFile(path, content+'\r\n', {

flag: 'a+'

}, (err) => {

if (err) {

console.oldLog(`输出日志错误:${err}`.red)

}

})

}

}

/**

* 获取谷歌路径

*/

async GetChromePath() {

const chromePath = await new Promise((succ, fail) => {

var regUrl = "HKEY_LOCAL_MACHINE\\SOFTWARE\\Microsoft\\Windows\\CurrentVersion\\App Paths\\chrome.exe";

var cmdStr = 'reg query "' + regUrl + '"';

var cp = proc.exec(cmdStr, (error, stdout, stderr) => {

if (error != null) {

fail('exec error: ' + error);

return;

}

if (stderr != '') {

fail('output error: ' + stderr);

return;

}

var re = /reg_sz\s+(.+\.exe)/ig;

var matchRet = re.exec(stdout);

if (matchRet != null && matchRet.length > 1) {

return succ(matchRet[1]);

} else {

return succ("");

}

});

});

return chromePath;

}

}

module.exports = new Util();