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.
الوصف
Used to return some response headers before the final HTTP message. Allows the browser to start preloading resources while the server prepares the response.
متى تراه
When a server wants the browser to start loading CSS/JS before the full response is ready.
كيفية الإصلاح
No fix needed. This optimization helps speed up page loading.
الوصف
Cloudflare-specific. The origin server returned an unexpected response that Cloudflare could not process.
متى تراه
When Cloudflare receives an empty, unknown, or malformed response from the origin.
كيفية الإصلاح
Check origin server logs. Ensure responses include proper headers. Verify SSL configuration.
الفروق الرئيسية
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.
متى تستخدم أيًا منهما
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.