node-serialization

node-serialization

A serialization library for node. Serialize/Deserialize a huge object to/from a file.

Using v8 Serialization API as default. You can provide custom serialization functions, like JSON(stringify/parse), json-stream-stringify, etc.

Usage

const { readFile, writeFile } = require("node-serialization");

Default serialize/deserialize method

Write a object to a file and read the file restore a object.

var path = "cache.data";
var data = {
  foo: "bar",
};

writeFile(path, data).then(() => console.log("saved"));

readFile(path).then((data) => console.log(data));

Custom serialize/deserialize method

Use a custom serialization method.

const { serialization } = require("node-serialization");

const serialize = function (object) {
  return JSON.stringify(object);
};
const deserialize = function (string) {
  return JSON.parse(string);
};

const { readFile: readJsonFile, writeFile: writeJsonFile } = serialization(
  serialize,
  deserialize
);

var path = "cache.json";
var data = {
  foo: "bar",
};

writeJsonFile(path, data).then(() => console.log("saved"));

readJsonFile(path).then((data) => console.log(data));

Convert Format

Deserialize a file then serialize into another file with different serialization.

const {
  convert,
  serializeJson,
  deserialize: deserializeV8,
} = require("node-serialization");

convert(
  "cache.data",
  deserializeV8,
  "cache.data.json",
  serializeJson
).catch((err) => console.error(err));

Methods

Async

• readFile
• writeFile
• readJson
• writeJson
• convert

Sync

• readFileSync
• writeFileSync
• readJsonSync
• writeJsonSync
• convertSync
• serialize
• deserialize
• serializeJson
• deserializeJson

If file parameter is a file path (type is string, not a buffer or a file descriptor), the writeXxx functions will write content to a temporary file while writing, and rename to the path of file parameter when success. So even if an exception(such as OOM) occurs, the file will not be a file with content loss.

License

Copyright (c) 2020 dailyrandomphoto. Licensed under the MIT license.