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     _   _           _        _____  _______      __
    | \ | |         | |      / ____|/ ____\ \    / /
    |  \| | ___   __| | ___ | |    | (___  \ \  / / 
    | . ` |/ _ \ / _` |/ _ \| |     \___ \  \ \/ /  
    | |\  | (_) | (_| |  __/| |____ ____) |  \  /   
    |_| \_|\___/ \__,_|\___| \_____|_____/    \/     New BSD License

This project provides CSV parsing and has been tested and used on large input files. It provides every option you would expect from an advanced CSV parser and stringifier.

The full documentation of the CSV parser is available here.

NPM NPM

IMPORTANT

There is at the moment an important re-design of this module. The project will be split into 4 modules:

  • csv-generate, a flexible generator of CSV string and Javascript objects.
  • csv-parse, a parser converting CSV text into arrays or objects.
  • csv-transform, a simple object transformation framework.
  • csv-stringify, a stringifier converting records into a CSV text.

All the modules are fully be compatible with the stream 2 and 3 specifications. Also, a simple callback-based API is provided. Those modules are already released and usable separately. They will soon be available as part of this module. We are in the process of dispatching the full test cases into their appropriate module.

Usage

Installation command is npm install csv.

Quick example

// node samples/string.js
csv()
.from.string(
  '#Welcome\n"1","2","3","4"\n"a","b","c","d"',
  {comment: '#'} )
.to.array( function(data){
  console.log(data)
} );
// [ [ '1', '2', '3', '4' ], [ 'a', 'b', 'c', 'd' ] ]

Advanced example

// node samples/sample.js

var fs = require('fs');
var csv = require('csv');

// opts is optional
var opts = ;

csv()
.from.path(__dirname+'/sample.in', { delimiter: ',', escape: '"' })
.to.stream(fs.createWriteStream(__dirname+'/sample.out'))
.transform( function(row){
  row.unshift(row.pop());
  return row;
})
.on('record', function(row,index){
  console.log('#'+index+' '+JSON.stringify(row));
})
.on('close', function(count){
  // when writing to a file, use the 'close' event
  // the 'end' event may fire before the file has been written
  console.log('Number of lines: '+count);
})
.on('error', function(error){
  console.log(error.message);
});
// Output:
// #0 ["2000-01-01","20322051544","1979.0","8.8017226E7","ABC","45"]
// #1 ["2050-11-27","28392898392","1974.0","8.8392926E7","DEF","23"]
// Number of lines: 2

Migration

This README covers the current version 0.2.x of the node csv parser. The documentation for the previous version (0.1.0) is available here. The documentation for the incoming 0.3.x version is not yet released.

The functions 'from*' and 'to*' are now rewritten as 'from.' and 'to.'. The 'data' event is now the 'record' event. The 'data' now receives a stringified version of the 'record' event.

Development

Tests are executed with mocha. To install it, simple run npm install, it will install mocha and its dependencies in your project "node_modules" directory.

To run the tests:

npm test

The tests run against the CoffeeScript source files.

To generate the JavaScript files:

make build

The test suite is run online with Travis against Node.js version 0.6, 0.7, 0.8 and 0.9.

Contributors

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