An Infura HTTPS endpoint gives your Node.js program an Ethereum JSON-RPC connection without operating an Ethereum node, and Web3.js can confirm it by reading a chain ID and block number. What Infura and Web3.js each do Infura supplies an HTTPS…
Blockchain core components: nodes, blocks, hashes, and consensus A blockchain is a shared record that a network accepts through agreed rules. The components matter because each one answers a different question: what changed, who checked it, how the record connects…
Secure a subdomain with a free Let’s Encrypt certificate when its DNS record reaches the Nginx server that answers HTTP requests. Before you request a certificate Point an A or AAAA record for the subdomain at this server and make…
Terraform security starts with the files and identities that can change infrastructure, because a configuration can look harmless in Git while its state, plan output, provider credentials, or broad deployment role exposes more than the team intended. Protect state before…
Auth0 login for a PHP web application works best when your server uses the Authorization Code Flow through the maintained Auth0 PHP SDK. I installed the current SDK in a clean PHP 8.4 workspace and verified that its Auth0\SDK\Auth0 constructor…
Password hashing in Node.js with bcrypt means storing a slow, salted hash instead of the password itself. The async bcrypt API creates the hash during registration or a password change, then compares a login attempt against the stored hash. The…
Cybersecurity in web development starts by protecting each request before it reaches code that handles money, accounts, or personal data. Set a narrow security baseline Disable framework fingerprinting, set a modest request-body limit, return generic login failures, and keep secrets…
Highlight matching search terms in an AngularJS result list with a safe custom filter that escapes text and treats the query as a literal string.
Learn how to use Angular HttpClient and the Hacker News API to display top stories in a standalone Angular app.
AngularJS two-way data binding keeps a form control and its model value synchronized through ng-model. The profile editor below proves both directions in a served browser: form edits update the preview, Save copies the model, later edits leave that copy…
