How to use the parse function from JSONStream

Find comprehensive JavaScript JSONStream.parse code examples handpicked from public code repositorys.

JSONStream.parse is a Node.js module that provides a stream-based approach for parsing JSON data.

utils.js

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Utils.parseStream = function(stream, options, onRequest) {


  var onError = _.once(onRequest);
  var onSuccess = _.partial(onRequest, null);


  var result = JSONStream.parse();


  result.on('data', function(data) {


    // apply reviver walk function to prevent stringify/parse again

+ 8 other calls in file

index.js

GitHub: SumeetOutlook/sumeet-practice

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}


module.exports.json.stream = fetchJSONStream
function fetchJSONStream (uri, jsonPath, opts) {
  opts = config(opts)
  const parser = JSONStream.parse(jsonPath, opts.mapJson)
  const pt = parser.pipe(new PassThrough({objectMode: true}))
  parser.on('error', err => pt.emit('error', err))
  regFetch(uri, opts).then(res => {
    res.body.on('error', err => parser.emit('error', err))

+ 4 other calls in file

How does JSONStream.parse work?

JSONStream.parse is a streaming JSON parser for Node.js that reads in a JSON stream of data in chunks and emits events for each JSON object encountered in the stream. It allows you to process large JSON data sets without having to load the entire dataset into memory at once.

pug-doc-markdown.js

GitHub: mulder21c/hexo-theme-amorfati-v2

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/**
 * Output stream
 */

var stream = JSONStream.parse("*");
stream.on("data", function (data) {
  // create code snippet
  var snippet = createSnippet(data);

+ 7 other calls in file

index.js

GitHub: Pacharoth/node-smis

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  return newlines ? newlines.length : 0;
}


module.exports = function (opts) {
    if (!opts) opts = {};
    var parser = opts.raw ? through.obj() : JSONStream.parse([ true ]);
    var stream = through.obj(
        function (buf, enc, next) { parser.write(buf); next() },
        function () { parser.end() }
    );

Ai Example

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const fs = require("fs");
const JSONStream = require("JSONStream");
const es = require("event-stream");

const inputStream = fs.createReadStream("large-data.json");
const parser = JSONStream.parse("*");
const filter = es.map((data, callback) => {
  // Filter the data here
  if (data.someProperty === "someValue") {
    callback(null, data);
  } else {
    callback();
  }
});
inputStream.pipe(parser).pipe(filter).pipe(process.stdout);

In this example, JSONStream.parse('*') creates a parser that can read any JSON object at the top-level. The parsed JSON is then piped through a filter stream which can filter the JSON objects based on some condition before outputting the result. Finally, the output is piped to process.stdout.

Other functions in JSONStream

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