nodejs zlib
const zlib = require('zlib')
/**
* @description custom compression content encoding
*/
module.exports = () => {
return (req, res, next) => {
const compressType = req.headers['accept-encoding'].replace(/[,]/g, '').split(' ')
if (compressType[0] !== undefined && compressType[0] !== null) {
zlib.createGzip({
level: zlib.constants.Z_BEST_COMPRESSION,
strategy: zlib.constants.Z_RLE,
flush: zlib.constants.Z_FULL_FLUSH
})
return next()
}
if (compressType[1] !== undefined && compressType[1] !== null) {
zlib.createDeflate({
level: zlib.constants.Z_BEST_COMPRESSION,
strategy: zlib.constants.Z_RLE,
flush: zlib.constants.Z_FULL_FLUSH
})
return next()
}
if (compressType[2] !== undefined && compressType[2] !== null) {
zlib.createBrotliCompress({
flush: zlib.constants.BROTLI_OPERATION_FLUSH
})
return next()
}
}
}