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Editor's pickLearn how double-encoded query parameters happen, trace encoding across clients and servers, inspect raw requests, and fix serialization without unsafe repeated decoding.
Compare repeated keys, comma-separated values, and bracketed array query parameters. Learn OpenAPI serialization options and the edge cases to define.
Learn how query strings influence browser and CDN cache keys, when cache-busting works, and how Cache-Control and Vary affect response reuse.
Learn why duplicate query parameters return different values across services, how first, last, and list parsing work, and how to prevent parameter-pollution bugs.