The address bar is doing four jobs at once — here's each one

Every tap starts with a URL, and its four parts decide where your request goes and what it carries. Why nothing private should ever sit in one. Tap…

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You now understand

A URL is an address: how to talk, which computer, which thing, and extra instructions

You now understand

The domain is a human name that still has to be looked up

You now understand

Anyone can type any URL, so a URL alone never proves who's allowed

What this means for your app

If your app has addresses like /orders/42, ask what happens when someone types /orders/43. If they see another customer's order, the server isn't checking who's asking. That's check 3 in the…

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The address bar is doing four jobs at once — here's each one

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