npm package discovery and stats viewer.

Discover Tips

  • General search

    [free text search, go nuts!]

  • Package details

    pkg:[package-name]

  • User packages

    @[username]

Sponsor

Optimize Toolset

I’ve always been into building performant and accessible sites, but lately I’ve been taking it extremely seriously. So much so that I’ve been building a tool to help me optimize and monitor the sites that I build to make sure that I’m making an attempt to offer the best experience to those who visit them. If you’re into performant, accessible and SEO friendly sites, you might like it too! You can check it out at Optimize Toolset.

About

Hi, 👋, I’m Ryan Hefner  and I built this site for me, and you! The goal of this site was to provide an easy way for me to check the stats on my npm packages, both for prioritizing issues and updates, and to give me a little kick in the pants to keep up on stuff.

As I was building it, I realized that I was actually using the tool to build the tool, and figured I might as well put this out there and hopefully others will find it to be a fast and useful way to search and browse npm packages as I have.

If you’re interested in other things I’m working on, follow me on Twitter or check out the open source projects I’ve been publishing on GitHub.

I am also working on a Twitter bot for this site to tweet the most popular, newest, random packages from npm. Please follow that account now and it will start sending out packages soon–ish.

Open Software & Tools

This site wouldn’t be possible without the immense generosity and tireless efforts from the people who make contributions to the world and share their work via open source initiatives. Thank you 🙏

© 2024 – Pkg Stats / Ryan Hefner

express-response-filter

v0.5.2

Published

Express middleware for filtering-out parts of JSON responses based on the `fields` query-string.

Downloads

10

Readme

Express Response Filter Middleware NPM version

This Express Middleware will allow you to send a subset of a JSON object instead of an entire object from your HTTP services. To do so, your services will begin accepting the ?fields= query-string that, using a simple language, will specify which fields and sub-feelds to keep and which to ignore.

If you've used the Google APIs, provided a ?fields= query-string to get a Partial Response, and wanted to do the same for your own server, now you can do so with this middleware.

Underneath, this middleware uses json-mask. Use it directly without this middleware if you need more flexibility.

Installation

npm install express-response-filter --save

Usage

var express = require('express')
  , responseFilter = require('express-response-filter')
  , app = express()

app.use(responseFilter({
  filter: ["test"],
}))

app.get('/', function (req, res, next) {
  // keyword filter, not influenced by user query input
  req.customFilter = ["id", "password", "token"]; // concat to opt.filters array

  res.json({
      firstName: 'Mohandas'
    , lastName: 'Gandhi'
    , aliases: [{
          firstName: 'Mahatma'
        , lastName: 'Gandhi'
      }, {
          firstName: 'Bapu'
      }]
  })
})

app.listen(4000)

Let's test it:

$ curl 'http://localhost:4000'
{"firstName":"Mohandas","lastName":"Gandhi","aliases":[{"firstName":"Mahatma","lastName":"Gandhi"},{"firstName":"Bapu"}]}

$ # Let's just get the first name
$ curl 'http://localhost:4000?fields=lastName'
{"lastName":"Gandhi"}

$ # Now, let's just get the first names directly as well as from aliases
$ curl 'http://localhost:4000?fields=firstName,aliases(firstName)'
{"firstName":"Mohandas","aliases":[{"firstName":"Mahatma"},{"firstName":"Bapu"}]}

Note: take a look at /example.

Syntax

Look at json-mask for the available syntax of the fields param.

Options

query specifies the query-string to use. Defaults to fields prefix specifies the query-string prefix. filter specifies the filter before json-masked. Array | Function is allowed

app.use(responseFilter({
  query: 'filter'
}))

License

MIT. See LICENSE

Reference To https://github.com/nemtsov/express-partial-response/