Code for http://stackoverflow.com/questions/14911746/how-to-post-base64-encoded-in-memory-image-as-file-parameter

gistfile1.js

var request = require('request');
var fs = require( 'fs' );
var path = require('path');

var WS_URL = 'http://api.ocrapiservice.com/1.0/rest/ocr';

SO2();

function SO2() {
  var base64Str = fs.readFileSync( 'example.png' ).toString( 'base64' );
  var buffer = new Buffer(base64Str, 'base64');
  ocr( buffer.toString( 'binary' ) );
}

function ocr( postData, header ) {
	var r = request.post(WS_URL, completed);
	var form = r.form();
	//  filename="example.png"\r\nContent-Type: image/png\r\n\r\n'
	var options = null;
	if( header ) {
		options = {
  		header: CRLF + '--' + form.getBoundary() + CRLF + header + CRLF + CRLF
		};
	}

	form.append('apikey', 'REMOVED');
	form.append('language', 'en' );
	form.append('image', postData, options );

	function completed(error, response, body) {
		console.log( body );
	}
}