get-products.js

// pull out /GeneralSearchResponse/categories/category/items/product tags
// the rest we don't care about.

var sax = require("../lib/sax.js")
var fs = require("fs")
var path = require("path")
var xmlFile = path.resolve(__dirname, "shopping.xml")
var xmlstr = fs.readFileSync(xmlFile).toString()
var parser = sax.parser(true)
var products = []
var product = null
var currentTag = null

parser.onclosetag = function (tagName) {
  if (tagName === "product") {
    products.push(product)
    currentTag = product = null
    return
  }
  currentTag = currentTag && currentTag.parent
}

parser.onopentag = function (tag) {
  if (tag.name !== "product" && !product) return
  if (tag.name === "product") {
    product = tag
  }
  tag.parent = currentTag
  tag.children = []
  tag.parent && tag.parent.children.push(tag)
  currentTag = tag
}

parser.ontext = function (text) {
  if (currentTag) currentTag.children.push(text)
}

parser.onend = function () {
  var util = require("util")
  var out = util.inspect(products, false, Infinity, true)
  console.error(out)
}

parser.write(xmlstr).end()