tsk-js/script/preinstall.js

A module that allows you to investigate disk images using Javascript by using The Sleuth Kit as library.

const Rx = require("rxjs/Rx");
const path = require("path");
const fs = require("fs");
const extractZip = require("extract-zip");
const rootPackageJson = require("../package.json");
const request = require("request");
const libUrl = `${process.platform}/${process.arch}/libtsk.a`;
const rootFolder = path.join(__dirname, "..");

const unzip$ = Rx.Observable.of({
    tskJsFolder: rootFolder,
    libsFolder: path.join(rootFolder, "lib"),
    libsZip: path.join(rootFolder, "misc", process.platform, process.arch, "tsk-js-libs.zip")
})
.filter((session) => fs.existsSync(session.vendorZip))
// Unzip
.mergeMap(session => Rx.Observable.create(observer => {
    extractZip(session.libsZip, { dir: session.libsFolder }, (err) => {
        if(err) {
            observer.error(`Cannot extract ${session.libsZip}`);
        } else {
            observer.next(session);
        }
        observer.complete();
    });
}))
.mapTo("Libraries extracted");


// const download$ = Rx.Observable.of({
//     baseUrl: "http://docs-tsk-js.54.37.131.126.xip.io/download",
//     libFile: path.join(__dirname, "../lib/libtsk.a")
// })
// .filter((session) => !fs.existsSync(session.libFile))
// // Download file
// .mergeMap(session => Rx.Observable.create(observer => {
//     const url = `${session.baseUrl}/${libUrl}`;
//     request(url, {encoding: 'binary'}, function (error, response, body) {
//         if (error) { observer.error(error); }
//         else {
//             session.response = response;
//             session.body = body;
//             observer.next(session); 
//         }
//         observer.complete();
//     });
// }))
// .filter(session => {
//     if(session.response.statusCode === 200) {
//         return true;
//     }
//     switch(session.response.statusCode) {
//         case 404:
//             console.log(`[404 NOT FOUND] ${libUrl}`);
//             break;
//     }
//     return false;
// })
// .do(session => {
//     fs.writeFile(session.libFile, session.body, 'binary', function (err) {});
// })
// .mapTo(`Downloaded ${libUrl}`);


// Main execution
!function main() {
    // List of flows to execute
    [
        unzip$,
        // download$
    ].forEach(obs$ => obs$.subscribe(
        x => x ? console.log(`${x}`) : console.log(obs$),
        err => console.log(`Error: ${err}`),
        () => {}
    ));
}();