I want to load test.txt with nodejs.
var fs = require('fs'); fs.readFile('./test.txt', function (err, data) { if (err) { throw err; } console.log(data); }); The path of the server is C:\server\test\server.js. The test.txt is located in the same directory, but I get this error: Error: ENOENT, no such file or directory 'C:\Users\User\test.txt'
Paths in Node are resolved relatively to the current working directory. Prefix your path with __dirname to resolve the path to the location of your Node script.
var fs = require('fs'); fs.readFile( __dirname + '/test.txt', function (err, data) { if (err) { throw err; } console.log(data.toString()); }); 
ReferenceError: __dirname is not defined. Is it because I sould manually define var __dirname = '/the/path/' ?
__dirname only works in Node scripts, not in the REPL.With Node 0.12, it's possible to do this synchronously now:
var fs = require('fs'); var path = require('path'); // Buffer mydata var BUFFER = bufferFile('../test.txt'); function bufferFile(relPath) { return fs.readFileSync(path.join(__dirname, relPath)); // zzzz.... } fs is the file system. readFileSync() returns a Buffer, or string if you ask.
fs correctly assumes relative paths are a security issue. path is a work-around.
To load as a string, specify the encoding:
return fs.readFileSync(path,{ encoding: 'utf8' }); You should use __dirname to get the directory name the file is located instead of the current working directory:
fs.readFile(__dirname + "/test.txt", ...); Use path and fs:
const fs = require("fs"); const pth = require("path"); Sync:
let data = fs.readFileSync(pth.join(__dirname,"file.txt")); console.log(data + ""); A-Sync:
fs.readFile(pth.join(__dirname,"file.txt"), (err, data) => { console.log(data + ""); }); And that; If you need to read the file continuously and send it to the client and the file size is not large, you may be able to keep a copy of it:
const exp = require("express"); const app = exp(); const fs = require("fs"); const pth = require("path"); let file = ""; app.get("/file", (q, r) => { if (file === "") file = fs.readFileSync(pth.join(__dirname,"file.txt")) + ""; r.writeHead(200, { "Content-Type": "text/plain" }); r.write(file); r.end(); }); so if it is in the same directory just do this
fs.readFile(__dirname+'/foo.txt',function(e,d){console.log(d)}) 
x.js at /tmp/x/x.js. Put the OPs code in it. Also create /tmp/x/test.txt. Now, set your working dir to /tmp (eg. cd /tmp) and use node x/x.js or node /tmp/x/x.js --> Error: ENOENT, no such file or directory 'test.txt'
If it's in same directory it should work. I have tested with the same code, with a file name.txt and it's working fine:
var fs = require('fs'); fs.readFile('./test.txt', function (err, data) { if (err) { throw err; } console.log(data.toString()); }); 
