mjaros / ais-decoder Goto Github PK

sorry, Im sure I am missing something simple for this

Missing padding like this:

    var checksumHex = checksum.toString(16).toUpperCase();
    if (checksumHex.length == 1) checksumHex = '0' + checksumHex;

I'm experiencing an issue when parsing high volume satellite AIS data where the below error is being thrown:
Invalid part number '2' while decoding message type 24

This does appear to be relatively rare (maybe every million records I've receiving), but it seems to destroy the stream and there doesn't seem to be anything I can do to handle the error from my side (i.e. log and skip) as I'm receiving the following afterwards:
[ERR_STREAM_DESTROYED]: Cannot call write after a stream was destroyed

I'm aware part number should alway be 0 or 1, but unfortunately there isn't anything I can do about a faulty transmitter.

I've simply moved the switch and if statements in ais-decoder.ts into a try/catch to prevent destroying the stream but I figured I'd open an issue incase you have a more elegant solution or a reason to destroy the stream on this event.

import AisDecoder from "ais-stream-decoder" ;

const aisDecoder = new AisDecoder();

In the examples in the readme, this code is used to import and construct an AisDecoder.
upon running the script ($ node index.js)
An error is returned, "TypeError: AisDecoder is not a constructor"