jsturtevant / az-firmware-updater Goto Github PK
View Code? Open in Web Editor NEWHelps simplify the work needed to control the process flow for updating firmware in node.js when using Azure IoT Hub.
License: MIT License
Helps simplify the work needed to control the process flow for updating firmware in node.js when using Azure IoT Hub.
License: MIT License
Having non anonymous sources for firmware files would be a common use case.
This could potentially be supported with zero changes to the public API interface.
Some rough pseudo code to give you an idea of a suggested approach:
// from lib/downloader.js
function downloadFirmware(uriToFile, options = {}) {
const parsedUri = url.parse(uriToFile);
const accountName = parsedUri.hostname.split('.')[0].replace('-secondary', '');
// it's too late at night for wrestling with javascript date formatting T^T
const canonicalizedHeaders = ['x-ms-date:Fri, 11 Oct 2017 21:49:13 GMT', 'x-ms-version:2009-09-19'].join('\n');
const canonicalizedResource = `/${accountname}${parsedUri.path.replace(/\/$/, '')}`;
const toSign = `GET\n\n\n\n\n\n\n\n\n\n\n\n${canonicalizedHeaders}\n${canonicalizedResource}`;
const signed = someFancyHmacSigningFunction(toSign);
const signature = toBase64(signed);
var requestInfo = {
hostname: parsedUri.hostname,
port: 443,
path: parsedUri.path,
method: 'GET',
headers: {
Authorization: `SharedKey ${accountName}:${signature}`
},
//disable session caching
agent: new https.Agent({
maxCachedSessions: 0
})
};
...
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