node js log to file

middleware officially. We recommend that you use "multiparty" directly because it is troublesome to handle errors. Next we will use "multiparty" to implement a version. 1. Use express (version 4.11.x) to create a project and use the default jade as the template engine. 2. In the project directory, install necessary components through npm install multiparty. 3. Modify views/index. jade to make a simple form for file upload. Extends layout block conte

node. js file read/write, convert sheet Atlas data to keel animation Atlas data var fs = require("fs") var readline = require("readline"); var rl = readline.createInterface({ input:process.stdin, output:process.stdout }); var path = undefined; var dbName = undefined; rl.question("请输入文件名",function(answer){ path

options = {SocketPath: '/tmp/node_http.sock ',Method: 'get ',Path :'/'}; Var req = http. request (options, function (res ){Console. log ('status: '+ res. statusCode );Console. log ('headers: '+ JSON. stringify (res. HEADERS )); Res. on ('data', function (chunk ){Console. log (chunk. toString ());});}); Req. end (); Run the above Code. If the

options = {SocketPath: '/tmp/node_http.sock ',Method: 'GET ',Path :'/'}; Var req = http. request (options, function (res ){Console. log ('status: '+ res. statusCode );Console. log ('headers: '+ JSON. stringify (res. HEADERS )); Res. on ('data', function (chunk ){Console. log (chunk. toString ());});}); Req. end (); Run the above code. if the

varpathname =Url.parse (req.url). Pathname; //__dirname Returns the physical path of the Web project varRealpath = __dirname + "/static" +pathname; Fs.exists (Realpath,function(exists) {if(!exists) { returnpage_404 (req, res, pathname); } Else { //FS's Createreadstream function, which returns the Readstream object varFile =Fs.createreadstream (Realpath); Res.writehead (200, { ' Content-type ': mimetype[realpath.split ('. '). Pop ()] | | ' Text/plain

'){ varPageContent = Fs.readfile (' index.html ', ' utf-8 ',function(err,data) {if(Err) {Console.log (' Server error:111 '); }Else{Res.writehead (200,{"Content-type": "Text/html"}); Res.write (data); Res.end (); } }); }Else if(Pathname = = '/post '){ varform =NewFormidable. Incomingform (); Form.uploaddir= './temp '; Form.parse (req,function(err,fields,files) {Res.writehead (200,{"Content-type": "Text/html"}); Console.log (files);//look a

These days, I have contacted node. js + express and found that no matter whether jade or ejs template system is used, a layout. (Jade | ejs) file will be automatically created. It is also used in a file name convention, instead of specifying layout in the code. However, in actual projects, multiple layout files may be

The file describing the package is a Package.json file.One such file, the information inside is quite big. We can give up manually. In order to practiced hand we have a command line to build such a package;After completing the information for the Name,varsion....license entry, you will be prompted with a message.Above is the information we fill in, we enter Yes below, the completion of the Package.json pack

1.node.js File Systemvar fs = require ("FS")2. Asynchronous and synchronousFunctions that read the contents of the file have asynchronous Fs.readfile () and synchronous Fs.readfilesync ().var fs = require (' FS ') fs.readfile (' a.txt ', ' utf-8 ', function (err,data) { if (err) { Console.error ( ERR) }else{ console.log ("Not aynsc===>" + data) }) Console.log (' app started ') va

/*** Gets the sum of all the file sizes in the specified directory in bytes* @param dir* @param callback*/function Getdirsize (dir,callback) {var size = 0;Fs.stat (Dir,function (err,stats) {if (ERR) return callback (ERR);//If an error occursif (Stats.isfile ()) return callback (null,stats.size);//If the fileFs.readdir (Dir,function (err,files) {//If it is a directoryif (ERR) return callback (ERR);//If traversing directory errorif (files.length==0) ret

varFS = require ("FS"); Fs.readfile (' 123.csv ',function(err, data) {varTable =NewArray (); if(Err) {console.log (err.stack); return; } converttotable (Data,function(table) {Console.log (table); }); Console.log ("Program execution Complete");functionconverttotable (data, callBack) {data=data.tostring (); varTable =NewArray (); varrows =NewArray (); Rows= Data.split ("\ r \ n"); for(vari = 0; i ) {Table.push (Rows[i].split (",")); } callBack (table);}node