jsonfile-compressed

similar to jsonfile, but with automatic jsonpack + lzma (7zip) compression+decompression

readFile(fileName, jsonPackEnabled = true, callback) 
writeFile(fileName, obj, jsonPackEnabled = true, callback)
readFileSync(fileName, jsonPackEnabled? = true)
writeFileSync(fileName, obj, jsonPackEnabled? = true)

Installation

npm i jsonfile-compressed

Usage

var jfc = require('jsonfile-compressed');
var obj = {"ok":"here is some stuff"};

jfc.writeFileSync("test.json", obj); //note - file extension is ignored
//object is saved as test.jsonpack.7z

var obj_decompressed = jfc.readFileSync("test.json"); //file extension optional
//^^^filename is automatically changed internally, from test.json to to test.jsonpack.7z

console.log(obj_decompressed);
//result:
//{ ok: 'here is some stuff' }

Usage - jsonpack disabled

sometimes the jsonpacked versions can be larger than the unpacked versions once compression is applied. make sure to check the compressed filesizes for your data to see if jsonpack is helping or not.

var obj = {"ok":"here is some stuff"};
var jsonPackEnabled = false;

jfc.writeFileSync("test2.json", obj, jsonPackEnabled);
//saved as test2.json.7z 

var obj_decompressed = jfc.readFileSync("test2.json", jsonPackEnabled);
console.log(obj_decompressed);
//result:
//{ ok: 'here is some stuff' }

Usage - async

var obj = {"ok2":"here is some stuff2"};
var jsonPackEnabled=true;

jfc.writeFile("test3.json", obj, jsonPackEnabled,function(err,res){
    jfc.readFile("test3.json", jsonPackEnabled, function(err2,res2){
        console.log("async",res2);
        //result
        //async { ok2: 'here is some stuff2' }
    });
});

See Also

• jsonfile-compressed-brotli - similar but uses brotli compression instead of LZMA
• json-shrink
• jsonfile