HTTP 206 Partial Content vs 521 Web Server Is Down
HTTP 206 (Partial Content) is a 2xx Success response, while 521 (Web Server Is Down) is a 5xx Server Error response. 206 indicates that the server is delivering only part of the resource due to a Range header sent by the client. Used for resumable downloads and video streaming. In contrast, 521 means that cloudflare-specific. The origin server refused the connection.
Описание
The server is delivering only part of the resource due to a Range header sent by the client. Used for resumable downloads and video streaming.
Когда вы это видите
During video streaming, large file downloads, or when resuming interrupted downloads.
Как исправить
No fix needed. This is normal behavior for range requests.
Описание
Cloudflare-specific. The origin server refused the connection.
Когда вы это видите
When Cloudflare can't establish a TCP connection to the origin server.
Как исправить
Check that the origin server is running and the firewall allows Cloudflare IPs.
Ключевые различия
206 is a 2xx Success response, while 521 is a 5xx Server Error response.
HTTP 206: The server is delivering only part of the resource due to a Range header sent by the client. Used for resumable downloads and video streaming.
HTTP 521: Cloudflare-specific. The origin server refused the connection.
You encounter 206 when during video streaming, large file downloads, or when resuming interrupted downloads.
You encounter 521 when when Cloudflare can't establish a TCP connection to the origin server.
Когда что использовать
For 206 (Partial Content): No fix needed. This is normal behavior for range requests. For 521 (Web Server Is Down): Check that the origin server is running and the firewall allows Cloudflare IPs.