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What Is a CDN Cache Key, and Why Are Your Users Seeing Stale Pages?
Blog Summary
You deployed the fix, but half your users still see the old page, and one of them sees someone else's. Both bugs come down to the CDN cache key. Here's how cache keys, Vary headers, query strings and purging really work.
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The Security Headers Most Sites Forget (and How to Add Them in Laravel)
Blog Summary
A few lines of HTTP headers can stop clickjacking, script injection and leaky URLs, and most sites still skip them. The common mistakes with CSP, HSTS, frame-ancestors, Referrer-Policy and Permissions-Policy, plus a Laravel middleware.
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Sessions Explained: How Websites Remember Who You Are
Blog Summary
HTTP forgets you after every request, yet you stay logged in for hours. Here's what really happens: the session ID cookie, server-side storage, expiry, session fixation, and choosing a Laravel session driver.
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How HTTP/2 and HTTP/3 Make the Web Faster (Without Changing Your Code)
Blog Summary
Your page needs dozens of files, and HTTP/1.1 fetched them through a handful of narrow pipes. HTTP/2 and HTTP/3 changed that: multiplexing, header compression, QUIC over UDP, and the head-of-line blocking problem explained simply.
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TCP vs UDP: Why Video Calls and Web Pages Use Different Protocols
Blog Summary
A slow web page makes you wait, a bad video call just drops a word. That's TCP and UDP at work. Here's how each one handles packet loss, why head-of-line blocking matters, and how QUIC and HTTP/3 fit in.
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What Actually Happens When You Type a URL and Press Enter
Blog Summary
Pressing Enter starts a relay race of DNS, TCP, TLS, HTTP, server work and rendering. Learn the whole route once and you'll know exactly where a slow page is hiding its delay.
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01. About Shiroz
Mohammed Shiroz
Hi, I'm Mohammed Shiroz, a software engineer and AI enthusiast from Sri Lanka who turns ideas into intelligent, real-world solutions. With over 9 years of hands-on experience, I currently lead real estate ERP development at Kate Group, a...
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