nodejs load file


Question

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'

1
48
7/8/2012 4:19:39 PM

Accepted Answer

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());
});
67
3/27/2012 11:36:11 PM

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' });

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