xpath-stream

xpath transform stream

Install

$ npm install xpath-stream

Usage

var xpathStream = require('xpath-stream');

// string stream
var Readable = require('stream').Readable;
function testStream(str){
  var stream = new Readable({objectMode:true});
  stream.push(str);
  stream.push(null);
  return stream
};

var xml = testStream([
'<items>',
  '<item id="1">',
  '<name type="001">item1</name>',
  '<price>5000</price>',
  '<nest>',
  '<data>nested</data>',
  '<nest2><data>nested2</data></nest2>',
  '</nest>',
  '</item>',
  '<item id="2"><name type="002">item2</name><price>1000</price></item>',
'</items>'].join(''));

// text node
xml
  .pipe(xpathStream("//item/name/text()"))
  .on('data',console.log);

// attribute value
xml
  .pipe(xpathStream("//item/@id"))
  .on('data',console.log);

// xmldom object
xml
  .pipe(xpathStream("//item"))
  .on('data',console.log);

// object
xml.pipe(xpathStream("//item",{
  id: "./@id",
  type: "name/@type",
  name: "name/text()",
  price: "price/text()",
  nest: {
    data: "nest/data/text()",
    data2: "nest/nest2/data/text()",
    deepNest: {
      deepData: "nest/nest2/data/text()"
    }
  }
}))
.on('data',function(node){
  console.log(JSON.stringify(node));
});

Bonus

$ npm install -g xpath-stream

then

$ xpath-stream "//root/node()" < test.xml

or

$ cat test.xml | xpath-stream "//articles/article[position()=1]/node()"

with namespace

$ xpath-stream --namespace=ns:http://example.com/ns "//ns:item[@ns:id='5A23']" < ./test/test.xml