const MimeLib = require("mime"); class MimeDetector { nonTextTypes = ["multipart", "image", "model", "audio", "video"]; badMimes = [ "application/octet-stream", "application/zip", "application/pkcs8", "application/vnd.microsoft.portable-executable", "application/vnd.openxmlformats-officedocument.spreadsheetml.sheet", // XLSX are binaries and need to be handled explicitly. "application/x-msdownload", ]; constructor() { this.lib = MimeLib; this.setOverrides(); } setOverrides() { // the .ts extension maps to video/mp2t because of https://en.wikipedia.org/wiki/MPEG_transport_stream // which has had this extension far before TS was invented. So need to force re-map this MIME map. this.lib.define( { "text/plain": ["ts", "py", "opts", "lock", "jsonl", "qml", "sh"], }, true ); } getType(filepath) { return this.lib.getType(filepath); } } module.exports = { MimeDetector, };