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A bson parser for node.js and the browser

Javascript + C++ BSON parser

This BSON parser is primarily meant to be used with the mongodb node.js driver. However, wonderful tools such as onejs can package up a BSON parser that will work in the browser. The current build is located in the browser_build/bson.js file.

A simple example of how to use BSON in the browser:

  <script src="">
<body onload="start();">
  function start() {
    var BSON = bson().BSON;
    var Long = bson().Long;
    var doc = {long: Long.fromNumber(100)}
    // Serialize a document 
    var data = BSON.serialize(doc, false, true, false);
    // De serialize it again 
    var doc_2 = BSON.deserialize(data);

A simple example of how to use BSON in node.js:

var bson = require("bson");
var BSON = new bson.BSONPure.BSON();
var Long = bson.BSONPure.Long;
var doc = {long: Long.fromNumber(100)}
// Serialize a document 
var data = BSON.serialize(doc, false, true, false);
console.log("data:", data);
// Deserialize the resulting Buffer 
var doc_2 = BSON.deserialize(data);
console.log("doc_2:", doc_2);

The API consists of two simple methods to serialize/deserialize objects to/from BSON format:

  • BSON.serialize(object, checkKeys, asBuffer, serializeFunctions)

    • @param {Object} object the Javascript object to serialize.
    • @param {Boolean} checkKeys the serializer will check if keys are valid.
    • @param {Boolean} asBuffer return the serialized object as a Buffer object (ignore).
    • @param {Boolean} serializeFunctions serialize the javascript functions (default:false)
    • @return {TypedArray/Array} returns a TypedArray or Array depending on what your browser supports
  • BSON.deserialize(buffer, options, isArray)

    • Options
      • evalFunctions {Boolean, default:false}, evaluate functions in the BSON document scoped to the object deserialized.
      • cacheFunctions {Boolean, default:false}, cache evaluated functions for reuse.
      • cacheFunctionsCrc32 {Boolean, default:false}, use a crc32 code for caching, otherwise use the string of the function.
      • promoteBuffers {Boolean, default:false}, deserialize Binary data directly into node.js Buffer object.
    • @param {TypedArray/Array} a TypedArray/Array containing the BSON data
    • @param {Object} [options] additional options used for the deserialization.
    • @param {Boolean} [isArray] ignore used for recursive parsing.
    • @return {Object} returns the deserialized Javascript Object.