HTTP 103 Early Hints vs 520 Web Server Returned an Unknown Error
HTTP 103 (Early Hints) is a 1xx Informational response, while 520 (Web Server Returned an Unknown Error) is a 5xx Server Error response. 103 indicates that used to return some response headers before the final HTTP message. Allows the browser to start preloading resources while the server prepares the response. In contrast, 520 means that cloudflare-specific. The origin server returned an unexpected response that Cloudflare could not process.
Mô tả
Used to return some response headers before the final HTTP message. Allows the browser to start preloading resources while the server prepares the response.
Khi bạn thấy mã này
When a server wants the browser to start loading CSS/JS before the full response is ready.
Cách khắc phục
No fix needed. This optimization helps speed up page loading.
Mô tả
Cloudflare-specific. The origin server returned an unexpected response that Cloudflare could not process.
Khi bạn thấy mã này
When Cloudflare receives an empty, unknown, or malformed response from the origin.
Cách khắc phục
Check origin server logs. Ensure responses include proper headers. Verify SSL configuration.
Sự khác biệt chính
103 is a 1xx Informational response, while 520 is a 5xx Server Error response.
HTTP 103: Used to return some response headers before the final HTTP message. Allows the browser to start preloading resources while the server prepares the response.
HTTP 520: Cloudflare-specific. The origin server returned an unexpected response that Cloudflare could not process.
You encounter 103 when when a server wants the browser to start loading CSS/JS before the full response is ready.
You encounter 520 when when Cloudflare receives an empty, unknown, or malformed response from the origin.
Khi nào dùng cái nào
For 103 (Early Hints): No fix needed. This optimization helps speed up page loading. For 520 (Web Server Returned an Unknown Error): Check origin server logs. Ensure responses include proper headers. Verify SSL configuration.