LiteRT/Encodings

The buffer-based encoding utility method for node.js.

Following types of encodings are supported:

Name | Description | Binary-Safe -------------|---------------------------------|:-----------: base64 | The standard BASE64 encoding. | Yes base64url | The URL-safe BASE64 encoding. | Yes base62x | The BASE62x encoding. | Yes base32 | The standard BASE32 encoding. | Yes hex | The hexadecimal encoding. | Yes urlencode | The purely URL-safe encoding. | Yes strict_uri | The extended URL-safe encoding. | No

Encoding urlencode

This is a real urlencode implement, it will escape all bytes as %xx format, excepting A-Z, a-z and 0-9. This is a binary-safe encoding.

Binary-safe means it could work with binary data perfectly, without gibberish. And it's all the same below.

Encoding uri

This is a simple reference of method encodeURIComponent, so it works as method encodeURIComponent does. And it's not a binary-safe encoding.

Encoding strict_uri

This is based on uri, but all special chars including "-", ".", "_", "!", "*", "(", ")", "~", "'" will be escaped. However, it's still not a binary-safe encoding.

NOTE: The data of strict_uri encoding, could be simply decoded by function decodeURIComponent.

Encoding base64url

This is based on base64, while charactors "=", "+", "/" will be replaced with URL-safe charactors. This is a binary-safe encoding.

Encoding base62x

This is a variation of base64. And it is a binary-safe encoding.

Installation

npm i @litert/encodings -S

Usage

import * as Enc from "@litert/encodings";

const hex = Enc.stringToHex("hello world");             // Encode a string into hex
const b62 = Enc.stringToBase62x("hello world");         // Encode a string into BASE62x
const b64 = Enc.stringToBase64("hello world");          // Encode a string into BASE64
const b64url = Enc.stringToBase64Url("hello world");    // Encode a string into BASE64URL
const b32 = Enc.stringToBase32("hello world");          // Encode a string into BASE32
const url = Enc.stringToUrlencode("hello world");       // Encode a string into URL
const strict = Enc.stringToStrictUri("hello world");    // Encode a string into Strict-URI

// Also, buffer is accepted as input.

Enc.bufferToHex(Buffer.from("hello world"));
Enc.bufferToBase62x(Buffer.from("hello world"));
Enc.bufferToBase64(Buffer.from("hello world"));
Enc.bufferToBase64Url(Buffer.from("hello world"));
Enc.bufferToBase32(Buffer.from("hello world"));
Enc.bufferToUrlencode(Buffer.from("hello world"));
Enc.bufferToStrictUri(Buffer.from("hello world"));

Enc.stringFromHex(hex);                         // Decode a hex-encoded data as a string
Enc.stringFromBase62x(b62);                     // Decode a BASE62x-encoded data as a string
Enc.stringFromBase64(b64);                      // Decode a BASE64-encoded data as a string
Enc.stringFromBase64Url(b64url);                // Decode a BASE64URL-encoded data as a string
Enc.stringFromBase32(b32);                      // Decode a BASE32-encoded data as a string
Enc.stringFromUrlencode(url);                   // Decode a urlencoded data as a string
Enc.stringFromStrictUri(strict);                // Decode a Strict-URI-encoded data as a string

Enc.bufferFromHex(hex);
Enc.bufferFromBase62x(b62);
Enc.bufferFromBase64(b64);
Enc.bufferFromBase64Url(b64url);
Enc.bufferFromBase32(b32);
Enc.bufferFromUrlencode(url);
Enc.bufferFromStrictUri(strict);

License

This library is published under Apache-2.0 license.