HTTP 202 Accepted vs 431 Request Header Fields Too Large
HTTP 202 (Accepted) is a 2xx Success response, while 431 (Request Header Fields Too Large) is a 4xx Client Error response. 202 indicates that the request has been accepted for processing, but the processing has not been completed. The request might or might not eventually be acted upon. In contrast, 431 means that the server refuses to process the request because an individual header field or all headers collectively are too large.
説明
The request has been accepted for processing, but the processing has not been completed. The request might or might not eventually be acted upon.
このコードが表示される場合
For async operations like batch jobs, email sending, or background tasks that take time to complete.
解決方法
Poll the provided status URL or wait for a callback/webhook.
説明
The server refuses to process the request because an individual header field or all headers collectively are too large.
このコードが表示される場合
When cookies accumulate to an excessive size, or a single header (like Authorization) is too long.
解決方法
Reduce header sizes. Clear excessive cookies. Use shorter tokens.
主な違い
202 is a 2xx Success response, while 431 is a 4xx Client Error response.
HTTP 202: The request has been accepted for processing, but the processing has not been completed. The request might or might not eventually be acted upon.
HTTP 431: The server refuses to process the request because an individual header field or all headers collectively are too large.
You encounter 202 when for async operations like batch jobs, email sending, or background tasks that take time to complete.
You encounter 431 when when cookies accumulate to an excessive size, or a single header (like Authorization) is too long.
どちらをいつ使うか
For 202 (Accepted): Poll the provided status URL or wait for a callback/webhook. For 431 (Request Header Fields Too Large): Reduce header sizes. Clear excessive cookies. Use shorter tokens.