build_fdf_for_pdf_fill.js

var fs = require('fs');
var Iconv = require('iconv').Iconv;
var iconv = new Iconv('UTF-8', 'UTF-16');

function fdfFileBuild(data, fileName) {
  var header, body, footer, dataKeys;

  header = Buffer([]);
  header = Buffer.concat([ header, new Buffer("%FDF-1.2\n") ]);
  header = Buffer.concat([ header, new Buffer((String.fromCharCode(226)) + (String.fromCharCode(227)) + (String.fromCharCode(207)) + (String.fromCharCode(211)) + "\n") ]);
  header = Buffer.concat([ header, new Buffer("1 0 obj \n") ]);
  header = Buffer.concat([ header, new Buffer("<<\n") ]);
  header = Buffer.concat([ header, new Buffer("/FDF \n") ]);
  header = Buffer.concat([ header, new Buffer("<<\n") ]);
  header = Buffer.concat([ header, new Buffer("/Fields [\n") ]);

  footer = Buffer([]);
  footer = Buffer.concat([ footer, new Buffer("]\n") ]);
  footer = Buffer.concat([ footer, new Buffer(">>\n") ]);
  footer = Buffer.concat([ footer, new Buffer(">>\n") ]);
  footer = Buffer.concat([ footer, new Buffer("endobj \n") ]);
  footer = Buffer.concat([ footer, new Buffer("trailer\n") ]);
  footer = Buffer.concat([ footer, new Buffer("\n") ]);
  footer = Buffer.concat([ footer, new Buffer("<<\n") ]);
  footer = Buffer.concat([ footer, new Buffer("/Root 1 0 R\n") ]);
  footer = Buffer.concat([ footer, new Buffer(">>\n") ]);
  footer = Buffer.concat([ footer, new Buffer("%%EOF\n") ]);

  dataKeys = Object.keys(data);

  body = new Buffer([]);

  for(var i=0; i<dataKeys.length; i++) {
    var name = dataKeys[i];
    var value = data[name];

    body = Buffer.concat([ body, new Buffer("<<\n") ]);
    body = Buffer.concat([ body, new Buffer("/T (") ]);
    body = Buffer.concat([ body, iconv.convert(name) ]);
    body = Buffer.concat([ body, new Buffer(")\n") ]);
    body = Buffer.concat([ body, new Buffer("/V (") ]);
    body = Buffer.concat([ body, iconv.convert(value) ]);
    body = Buffer.concat([ body, new Buffer(")\n") ]);
    body = Buffer.concat([ body, new Buffer(">>\n") ]);
  }

  fs.writeFileSync(fileName, Buffer.concat([ header, body, footer ]));
}

var myInfo = {
  myField01: "Ramón Muño@",
  myField02: "Lázaro Cárdenas #3245, Ciudad Juárez, Chihuahua, México."
}

fdfFileBuild(myInfo, "test2.fdf");