0.2.6 • Published 5 years ago
encoded-buffer v0.2.6
Encoded-Buffer
Encode data into a well-formatted buffer and decode it when needed.
Example
const { encode, decode } = require("encoded-buffer");
let buf = encode( // encode data
"string",
12345,
Symbol("desc"),
/regexp/,
["a", "r", "r", "a", "y"],
{type: "object"},
null,
undefined,
Buffer.from("or a buffer"),
new Error("even an error"),
new Date()
true
);
console.log(buf);
console.log(buf.toString());
let data = decode(buf); // decode data
console.log(data); // decoded data is an array, or null when failed.
Buffer Format
When data is encoded, it will be formatted with a leading character and number
that indicates the original type
and the byte length
of the data, and
every part of the data is separated by ;
. the style would seemed like this:
s:6:string;n:5:12345;S:12:Symbol(desc);r:8:/regexp/;...
Array will be enwrapped with []
, and objects will be enwrapped with {}
,
and they are encoded recursively.
This map shows the representations of supported types:
a => Array
arrays will be encoded recursively.b => boolean
booleans are encoded either as 1 or empty buffer.B => Buffer
buffers will keep the original form.d => Date
encode the ISO string, when decode, generate a new instance.e => Error
encode all properties in an object, when decode, generate a new instance according to the name, message, stack and any other properties.f => function
functions cannot be encoded, so treated asvoid
.n => number
encoded as string.o => object
objects will be encoded recursively.r => RegExp
encoded as string.s => string
buffered as what it is, special characters like\r
,\n
, etc. should be escaped.S => symbol
encoded as string, when decode, generate a new symbol.u => undefined
encoded as0x0
.v => void
fornull
, encoded as0x0
.
Purpose
The major purpose of the this module is meant to encode data into a well-formatted buffer, so that it could be transferred via the Internet or other materials, and decoded automatically by the program.