Ah! This one has been pending on me for a long time. But as the cozy winters and holiday season are here I felt to wrap up things I wanted to finish this year. After all this year I was trying to push my boundaries and put myself in challenging situa...
CORS refers to Cross-Origin Resource Sharing. It’s a terminology used in the context of browser requests. Now before we get deeper into CORS, we first need to understand origin and why the need for CORS Origin and same origin policy Origin is the sou...
It allows an attacker to execute a malicious arbitrary Javascript code within the web browser of victim user. This gives the attacker’s script privileged access to make requests to the server (such as same-origin cookies and storage permissions) and ...
CSRF refers to cross-site request forgery. It is an exploit on websites where an attacker is forging the identity of a trusted user to perform an action that the user didn’t intend to. Who is a trusted user? A trusted user for a website can be an aut...
As software engineers, logs are our best friend for finding anything right/wrong with our services. Be it exception tracing, RCA for a bug, consumer claims, or user journey, logs are the tool to trace it. Yet, I feel as software engineers, we do not ...
It is a probabilistic space-efficient data structure with O(1) insertion and retrieval. It is used to find if a key exists (with false positives) or not (no false negatives). It can be used as a data layer to check if a key exists before querying the...
Database partitioning in simplest terms refers to dividing a big table into smaller tables for ease of maintenance, query optimization, etc. Advantages:- Faster querying - Queries can be parallelly processed for range and aggregate queries and match...
Why Indexes? Database indexes are used for faster data retrieval. Let's explore the underlying data structure behind these indexes that enables faster queries. Hash Index This is a log based index and probably simpler and easiest to implement. It sto...