HTTP 202 Accepted vs 422 Unprocessable Content
HTTP 202 (Accepted) is a 2xx Success response, while 422 (Unprocessable Content) 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, 422 means that the server understands the content type and syntax, but was unable to process the contained instructions. Common in API validation errors.
描述
The request has been accepted for processing, but the processing has not been completed. The request might or might not eventually be acted upon.
何时出现
For async operations like batch jobs, email sending, or background tasks that take time to complete.
如何修复
Poll the provided status URL or wait for a callback/webhook.
描述
The server understands the content type and syntax, but was unable to process the contained instructions. Common in API validation errors.
何时出现
When form validation fails — correct syntax but invalid data (e.g., email format wrong, date in the past).
如何修复
Check the response body for specific validation errors and correct the input data.
主要区别
202 is a 2xx Success response, while 422 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 422: The server understands the content type and syntax, but was unable to process the contained instructions. Common in API validation errors.
You encounter 202 when for async operations like batch jobs, email sending, or background tasks that take time to complete.
You encounter 422 when when form validation fails — correct syntax but invalid data (e.g., email format wrong, date in the past).
何时使用哪个
For 202 (Accepted): Poll the provided status URL or wait for a callback/webhook. For 422 (Unprocessable Content): Check the response body for specific validation errors and correct the input data.