HTTP 200 OK vs 520 Web Server Returned an Unknown Error
HTTP 200 (OK) is a 2xx Success response, while 520 (Web Server Returned an Unknown Error) is a 5xx Server Error response. 200 indicates that the request succeeded. The meaning depends on the HTTP method: GET returns the resource, POST reports the action result, HEAD returns headers only. In contrast, 520 means that cloudflare-specific. The origin server returned an unexpected response that Cloudflare could not process.
Descrição
The request succeeded. The meaning depends on the HTTP method: GET returns the resource, POST reports the action result, HEAD returns headers only.
Quando você o vê
The most common HTTP response — indicates the request was processed successfully.
Como corrigir
No fix needed. The request succeeded as expected.
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
200 is a 2xx Success response, while 520 is a 5xx Server Error response.
HTTP 200: The request succeeded. The meaning depends on the HTTP method: GET returns the resource, POST reports the action result, HEAD returns headers only.
HTTP 520: Cloudflare-specific. The origin server returned an unexpected response that Cloudflare could not process.
You encounter 200 when the most common HTTP response — indicates the request was processed successfully.
You encounter 520 when when Cloudflare receives an empty, unknown, or malformed response from the origin.
Quando usar qual
For 200 (OK): No fix needed. The request succeeded as expected. For 520 (Web Server Returned an Unknown Error): Check origin server logs. Ensure responses include proper headers. Verify SSL configuration.