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index.js
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index.js
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var R = require('ramda')
var zlib = require('zlib')
var Bluebird = require('bluebird')
var DEFAULT_COMPRESSION_OPTIONS = {
level: zlib.Z_BEST_COMPRESSION
}
function deflate(buffer) {
return new Bluebird(function(resolve, reject) {
zlib.gzip(buffer, DEFAULT_COMPRESSION_OPTIONS, function(err, compressed) {
return err ? reject(err) : resolve(compressed)
})
})
}
function inflate(buffer) {
return new Bluebird(function(resolve, reject) {
zlib.gunzip(buffer, {}, function(err, data) {
return err ? reject(err) : resolve(data)
})
})
}
// deflateFromObj :: Object -> Promise Buffer
var deflateFromObj = R.composeP(
deflate
, Buffer.from
, R.compose(Bluebird.resolve, JSON.stringify)
)
// inflateToObj :: Buffer -> Promise Object
var inflateToObj = R.composeP(
JSON.parse
, function (inflated) { return inflated.toString() }
, inflate
)
module.exports = {
deflate: deflate
, inflate: inflate
, deflateFromObj: deflateFromObj
, inflateToObj: inflateToObj
}