@softchef/cdk-iot-device-management/node_modules/@aws-sdk/hash-stream-node/dist-es/fileStreamHasher.js

IoT device management is composed of things, thing types, thing groups, jobs, files API services. The constructs can be used independently, that are based on full-managed service to create an API Gateway & Lambda function.

import { createReadStream } from "fs";
import { HashCalculator } from "./HashCalculator";
export var fileStreamHasher = function (hashCtor, fileStream) {
    return new Promise(function (resolve, reject) {
        if (!isReadStream(fileStream)) {
            reject(new Error("Unable to calculate hash for non-file streams."));
            return;
        }
        var fileStreamTee = createReadStream(fileStream.path, {
            start: fileStream.start,
            end: fileStream.end,
        });
        var hash = new hashCtor();
        var hashCalculator = new HashCalculator(hash);
        fileStreamTee.pipe(hashCalculator);
        fileStreamTee.on("error", function (err) {
            hashCalculator.end();
            reject(err);
        });
        hashCalculator.on("error", reject);
        hashCalculator.on("finish", function () {
            hash.digest().then(resolve).catch(reject);
        });
    });
};
var isReadStream = function (stream) { return typeof stream.path === "string"; };