'data' events do not contain transformed JSON

[haysclark]

If a user listens for 'data' events on an Oboe instance, the chunk contains the original request data, not the transformed JSON. This functionality would be very helpful with large JSON files, or when scraping data with libraries such as x-ray.

Running example on Repl.it

Code from example:

// based on http://oboejs.com/examples#transforming-json-while-it-is-streaming
const oboe = require("oboe");
const fs = require('fs');
const stream = fs.createReadStream('./example.json');

function toLower(s){
   return s.toLowerCase();
}

const oboeStream = oboe(stream)
   .node('verb', toLower)
   .node('noun', toLower)
   .node('!.*', function(pair) {
      console.log('Please', pair.verb, 'me some', pair.noun);
   });

// oboe's 'data' events do not contain the transformed JSON
oboeStream.on('data', chunk => {
  console.log(chunk);
});

Output:

Note that JSON data is not transformed.

[
  {"verb":"VISIT", "noun":"SHOPS"},
  {"verb":"FIND", "noun":"WINE"},
  {"verb":"MAKE", "noun":"PIZZA"}
]
Please visit me some shops
Please find me some wine
Please make me some pizza

[Aigeec]

If you use the pipe line you can get the transformed data:

const oboeStream = oboe(stream)
   .node('verb', toLower)
   .node('noun', toLower)
   .node('!.*', function(pair) {
      console.log('Please', pair.verb, 'me some', pair.noun);      
   }).done((data) => {
      console.log(data)
   });

data would be the following:

[
  { verb: 'visit', noun: 'shops' },
  { verb: 'find', noun: 'wine' },
  { verb: 'make', noun: 'pizza' }
]

The on 'data' is actually just outputting the string that was received. It's not parsed.