Hujiang Technology

Nov 16, 2017 · Frontend Development

Investigation of Massive HTTP 406 Errors Caused by Incorrect Accept Header from a Search Engine Crawler

The article details a real‑world investigation of a surge of HTTP 406 errors on a Chinese e‑learning platform, tracing the issue to malformed Accept headers sent by a search‑engine crawler and illustrating how CDN routing and header negotiation can cause widespread client‑side failures.