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Before we fully appreciate how important HTTP cookies are, let’s imagine the web without them. HTTP is inherently stateless. This means that the HTTP server is not allowed and not capable of storing any context between requests. It has no memory of prior questions from the same client. Contrary to stateful protocols like FTP or SSH. They have a concept of long-running session. If you change the working directory during a session, subsequent commands take that into account. This is not the case for HTTP. For example, imagine you just logged in to GMail to see the list of unread e-mails. Now you click the most important one, from the Nigerian prince . Sadly, the server has no idea you are the person who just logged in. You must log in again. And again. This is where cookies help tremendously.
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Jest to odcinek podkastu:
Around IT in 256 seconds
Podcast for developers, testers, SREs... and their managers. I explain complex and convoluted technologies in a clear way, avoiding buzzwords and hype. Never longer than 4 minutes and 16 seconds. Because software development does not require hours of lectures, dev advocates' slide decks and hand waving. For those of you, who want to combat FOMO, while brushing your teeth. 256 seconds is plenty of time. If I can't explain something within this time frame, it's either too complex, or I don't understand it myself.
By Tomasz Nurkiewicz. Java Champion, CTO, trainer, O'Reilly author, blogger
Kategorie:
Technologia
Technologia