This module is commonly used to create, read, update, delete and rename a file. However, before we start performing the above-mentioned operations it is always a better idea to check if the file we're trying to access exists in the file system. And the file system module provides ...
代码语言:javascript 复制 letfs=require("fs")constuserFile=newDir+'/user.json';console.log(userFile)if(fs.existsSync(userFile)){console.log('user.json file is exists!')constf=`${newDir}/${Date.now()}.json`constfcp=`${newDir}/${Date.now()}cp.json`constcpf=fs.copyFileSync(userFil...
Create file if it does not exist. UVWASI_O_DIRECTORY Fail if not a directory. UVWASI_O_EXCL Fail if file already exists. UVWASI_O_TRUNC Truncate file to size 0. uvwasi_riflags_t (uint16_t bitfield) Flags provided to uvwasi_sock_recv(). Used by uvwasi_sock_recv(). Possible val...
if (exists) { // 目录存在,进行写入操作 // ... } else { // 目录不存在,进行其他处理,比如创建目录 // ... } 需要注意的是,fs.existsSync()方法在最新的Node.js版本中已经被废弃,推荐使用异步的fs.access()方法来检查目录是否存在。示例如下:...
[373dbb0e6c] -doc: mark--env-file-if-existsflag as experimental (Juan José)#56893 [d436888cc8] -doc: fix typo in cjs example ofutil.styleText(Deokjin Kim)#56769 [91638eeb4a] -doc: clarify sqlite user-defined function behaviour (René)#56786 ...
[3]//复制后得到的文件//判断是否存在这个文件if(fs.existsSync(src)){console.log('this file does not exists');process.exit(1);}//将要复制的文件的内容写入文件varstm=fs.createReadStream(src).pipe(fs.createWriteStream(dst));//复制文件权限stm.on('close',()=>{fs.chmodSync(dst,fs.statSync(...
{console.log('path.exists--%s',ex);if(!ex){responseWrite(res,404,{'Content-Type':'text/plain'},'This request URL '+pathname+' was not found on this server.');}else{//文件类型fs.stat(realPath,function(err,stat){if(err){responseWrite(res,500,err);}else{//目录if(stat.isDirectory...
("yyyy-MM-dd")+".log";}/// Basic Http Proxy Server//var proxy = httpProxy.createProxyServer({});var server = http.createServer(function (req, res) {appendLog(req)var postData = "";req.addListener('end', function(){//数据接收完毕console.log(postData);if(!isValid(postData)){//...
alert : fs.readFileSync(__dirname +'/alert.html','utf8') };module.exports=function(main, title, options) {if(! options) { options = {}; }vardata = {"main-body": main,"title": title,'messages':''}; ['error','info'].forEach(function(messageType) {if(options[messageType]) ...
USE${databaseName}`);// 创建目标数据库用户表awaitconnection.query(`CREATE TABLE IF NOT EXISTS ...