To help you get started, we've collected the most common ways that koa-compress is being used within popular public projects.

SubstraFoundation / substra-frontend / src / server / index.js View on Github

import serverConfig from '../../webpack/ssr/server';


const DEBUG = !(['production', 'development', 'staging'].includes(process.env.NODE_ENV));
const DEVELOPMENT = (['development', 'staging'].includes(process.env.NODE_ENV));


// Redefined publicPath and outputPath instead of import clientConfig to solve
// prod importation problems
const publicPath = DEBUG ? config.apps.frontend.baseName.debug : config.apps.frontend.baseName.production;
const outputPath = path.resolve(__dirname, '../../build/ssr/client');

const app = new Koa();
app.use(helmet());
app.use(cookie());
app.use(compress());

// let's encrypt config
const resolve = p => path.resolve(__dirname, p);
app.use(mount('/.well-known', serve(resolve('../../.well-known'))));

// UNIVERSAL HMR + STATS HANDLING GOODNESS:
if (DEVELOPMENT) {
    const multiCompiler = webpack([clientConfig, serverConfig]);
    const clientCompiler = multiCompiler.compilers[0];

    // First we fire up Webpack an pass in the configuration we
    // created
    let bundleStart = null;
    // We give notice in the terminal when it starts bundling and
    // set the time it started
    clientCompiler.plugin('compile', () => {

View more ways to use koa-compress

Koa Compress

Compress middleware for Koa

Example

const compress = require('koa-compress')
const Koa = require('koa')

const app = new Koa()
app.use(compress({
  filter (content_type) {
  	return /text/i.test(content_type)
  },
  threshold: 2048,
  gzip: {
    flush: require('zlib').constants.Z_SYNC_FLUSH
  },
  deflate: {
    flush: require('zlib').constants.Z_SYNC_FLUSH,
  },
  br: false // disable brotli
}))

Maintainers

• Lead: @jonathanong @jongleberry
• Team: @koajs/compress

Options

filter<Function>

function (mimeType: string): Boolean {

}

An optional function that checks the response content type to decide whether to compress. By default, it uses compressible.

options.threshold<String|Number>

Minimum response size in bytes to compress. Default 1024 bytes or 1kb.

options[encoding]<Object>

The current encodings are, in order of preference: br, gzip, deflate. Setting options[encoding] = {} will pass those options to the encoding function. Setting options[encoding] = false will disable that encoding.

options.br

Brotli compression is supported in node v11.7.0+, which includes it natively. As of v5.1.0, the default quality level is 4 for performance reasons.

options.defaultEncoding<String>

An optional string, which specifies what encoders to use for requests without Accept-Encoding. Default identity.

The standard dictates to treat such requests as * meaning that all compressions are permissible, yet it causes very practical problems when debugging servers with manual tools like curl, wget, and so on. If you want to enable the standard behavior, just set defaultEncoding to *.

Manually turning compression on and off

You can always enable compression by setting ctx.compress = true. You can always disable compression by setting ctx.compress = false. This bypasses the filter check.

app.use((ctx, next) => {
  ctx.compress = true
  ctx.body = fs.createReadStream(file)
})