HTTP 202 Accepted vs 520 Web Server Returned an Unknown Error
HTTP 202 (Accepted) is a 2xx Success response, while 520 (Web Server Returned an Unknown Error) is a 5xx Server 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, 520 means that cloudflare-specific. The origin server returned an unexpected response that Cloudflare could not process.
Descrição
The request has been accepted for processing, but the processing has not been completed. The request might or might not eventually be acted upon.
Quando você o vê
For async operations like batch jobs, email sending, or background tasks that take time to complete.
Como corrigir
Poll the provided status URL or wait for a callback/webhook.
Descrição
Cloudflare-specific. The origin server returned an unexpected response that Cloudflare could not process.
Quando você o vê
When Cloudflare receives an empty, unknown, or malformed response from the origin.
Como corrigir
Check origin server logs. Ensure responses include proper headers. Verify SSL configuration.
Diferenças principais
202 is a 2xx Success response, while 520 is a 5xx Server 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 520: Cloudflare-specific. The origin server returned an unexpected response that Cloudflare could not process.
You encounter 202 when for async operations like batch jobs, email sending, or background tasks that take time to complete.
You encounter 520 when when Cloudflare receives an empty, unknown, or malformed response from the origin.
Quando usar qual
For 202 (Accepted): Poll the provided status URL or wait for a callback/webhook. For 520 (Web Server Returned an Unknown Error): Check origin server logs. Ensure responses include proper headers. Verify SSL configuration.