1. const fs = require('fs'),
    2.     path = require('path'),
    3.     fsExports = {};
    5. /**
    6.  * @description 获取编码方式
    7.  * @method suffixHandle
    8.  * @param pathname {String}
    9.  * @return String
    10.  */
    11. let suffixHandle = (pathname) => {
    12.     let suffixReg = /\.([0-9a-zA-Z]+)$/,
    13.         suffix = suffixReg.test(pathname) ? suffixReg.exec(pathname)[1] : '',
    14.         encoding = 'utf8',
    15.         suffixFormatting = /^(png|jpeg|svg|webp|bmp|ico|mp3|mp4|wav|ogg|m3u8)$/i;
    16.     suffixFormatting.test(suffix) ? encoding = null : null;
    17.     return encoding;
    18. };
    19. /**
    20.  * @description 将用户传入的路径转换为绝对路径
    21.  * @method getName
    22.  * @param pathname {String}
    23.  * @return String
    24.  */
    25. let getName = pathname => path.resolve(pathname);
    27. // 读取文件
    28. ['readFile', 'readdir', 'mkdir', 'rmdir', 'unlink'].forEach(item => {
    29.     fsExports[item] = anonymous = (pathname) => {
    30.         pathname = getName(pathname);
    31.         return new Promise((resolve, reject) => {
    32.             let encoding = suffixHandle(pathname),
    33.                 callback = (err, result) => {
    34.                     if (err) reject(err);
    35.                     resolve(result);
    36.                 };
    37.             if (item !== 'readFile') {
    38.                 encoding = callback;
    39.                 callback = null;
    40.             }
    41.             fs[item](pathname, encoding, callback);
    42.         });
    43.     };
    44. });
    46. // 写入文件
    47. ['writeFile', 'appendFile'].forEach(item => {
    48.     fsExports[item] = anonymous = (pathname, content) => {
    49.         content !== null && typeof content === 'object' ? content = JSON.stringify(content) : null;
    50.         typeof content !== 'string' ? content += '' : null;
    51.         pathname = getName(pathname);
    52.         return new Promise((resolve, reject) => {
    53.             let encoding = suffixHandle(pathname);
    54.             fs[item](pathname, content, encoding, err => {
    55.                 if (err) reject(err);
    56.                 resolve('文件操作成功');
    57.             })
    58.         })
    59.     }
    60. });
    62. // 复制文件
    63. fsExports['copyFile'] = anonymous = (pathname, content) => {
    64.     content !== null && typeof content === 'object' ? content = JSON.stringify(content) : null;
    65.     typeof content !== 'string' ? content += '' : null;
    66.     pathname = getName(pathname);
    67.     return new Promise((resolve, reject) => {
    68.         let encoding = suffixHandle(pathname);
    69.         fs[item](pathname, content, encoding, err => {
    70.             if (err) reject(err);
    71.             resolve('文件操作成功');
    72.         })
    73.     })
    74. };
    77. module.exports = {...fsExports};