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HTTP 100 Continue
The server received the request headers and the client should proceed to send the body. Mostly seen with Expect: 100-continue on large uploads.
1xx · Informational✗ not retryable — fix the request instead
Fix checklist
- Nothing to fix — informational. If a client hangs here, check that it handles 1xx interim responses.
- Drop the Expect header if an intermediary mishandles it.
Spec: RFC reference