index.js

/* global Blob File */

/*
 * Module requirements.
 */

var isArray = require('isarray');

/**
 * Module exports.
 */

module.exports = hasBinary;

/**
 * Checks for binary data.
 *
 * Supports Buffer, ArrayBuffer, Blob and File.
 *
 * @param {Object} anything
 * @api public
 */

function hasBinary (obj) {
  if (!obj || typeof obj !== 'object') {
    return false;
  }

  if (isArray(obj)) {
    for (var i = 0, l = obj.length; i < l; i++) {
      if (hasBinary(obj[i])) {
        return true;
      }
    }
    return false;
  }

  if ((typeof global.Buffer === 'function' && global.Buffer.isBuffer && global.Buffer.isBuffer(obj)) ||
     (typeof global.ArrayBuffer === 'function' && obj instanceof ArrayBuffer) ||
     (typeof global.Blob === 'function' && obj instanceof Blob) ||
     (typeof global.File === 'function' && obj instanceof File)
    ) {
    return true;
  }

  // see: https://github.com/Automattic/has-binary/pull/4
  if (obj.toJSON && typeof obj.toJSON === 'function') {
    return hasBinary(obj.toJSON());
  }

  for (var key in obj) {
    if (Object.prototype.hasOwnProperty.call(obj, key) && hasBinary(obj[key])) {
      return true;
    }
  }

  return false;
}