ETags and Conditional Requests: Stop Sending the Same API Response Twice

June 5, 2026 · Dev.to

Amazon S3 Doesn't Hope Hardware Won't Fail. It Assumes It Already Has.
Most engineers build distributed systems hoping nothing breaks. Amazon S3 was engineered under the opposite assumption:
Real Madrid chief provides future updates on 3 Blancos stars
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Sherpa guide missing for a week on Mount Everest found crawling to base camp
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Charlotte Hornets 2025-26 player grades: Antonio Reeves
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I wrote about George Santos. Then he made a violent threat and lied about it
NPR reported on new federal investigations examining the former Congressman's bets on the prediction market site Kalshi.