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slip.js

slip.js is a JavaScript library for encoding and decoding Serial Line Internet Protocol packets. It works in both Node.js and in a web browser.

How Do I Use It?

slip.js provides two pieces of functionality: encoding and decoding messages.

Encoding

Encoding is stateless and synchronous. slip.encode() takes any array-like object containing bytes, such as a Uint8Array, Node.js Buffer, ArrayBuffer, or plain JavaScript Array. It returns a Uint8Array containing the encoded message.

Example

var message = new Uint8Array([99, 97, 116, 33]);
var slipEncoded = slip.encode(message); // Result is [192, 99, 97, 33, 192]

Options

Decoding

Decoding is stateful and asynchronous. You need to instantiate a slip.Decoder object, providing a callback that will be invoked whenever a complete message is received. By default, messages are limited to 10 MB in size. You can increase this value by providing a maxBufferSize option to the Decoder constructor, specified in bytes.

To decode a SLIP packet, call decode(). Whenever the slip.Decoder detects the end of an incoming message, it will call its onMessage callback.

Example

var logMessage = function (msg) {
    console.log("A SLIP message was received! Here is it: " + msg);
};

var decoder = new slip.Decoder({
    onMessage: logMessage,
    maxMessageSize: 209715200,
    bufferSize: 2048
});

decoder.decode(packet);
decoder.decode(otherPacket);

Options

Events

The onMessage callback's signature is:

The onError callback's signature is:

License

slip.js is written by Colin Clark and distributed under the MIT and GPL 3 licenses.