HTTP 203 Non-Authoritative Information vs 421 Misdirected Request
HTTP 203 (Non-Authoritative Information) is a 2xx Success response, while 421 (Misdirected Request) is a 4xx Client Error response. 203 indicates that the response payload has been modified by a transforming proxy from the origin server's 200 response. In contrast, 421 means that the request was directed at a server that is unable to produce a response for the combination of scheme and authority in the URI.
คำอธิบาย
The response payload has been modified by a transforming proxy from the origin server's 200 response.
เมื่อคุณพบเห็น
When a proxy or CDN modifies the response body (e.g., adds headers, transforms content).
วิธีแก้ไข
Check if a proxy is modifying the response. Access the origin directly if you need the original content.
คำอธิบาย
The request was directed at a server that is unable to produce a response for the combination of scheme and authority in the URI.
เมื่อคุณพบเห็น
With HTTP/2 when a connection is reused for a domain the certificate doesn't cover.
วิธีแก้ไข
Retry the request on a new connection.
ความแตกต่างหลัก
203 is a 2xx Success response, while 421 is a 4xx Client Error response.
HTTP 203: The response payload has been modified by a transforming proxy from the origin server's 200 response.
HTTP 421: The request was directed at a server that is unable to produce a response for the combination of scheme and authority in the URI.
You encounter 203 when when a proxy or CDN modifies the response body (e.g., adds headers, transforms content).
You encounter 421 when with HTTP/2 when a connection is reused for a domain the certificate doesn't cover.
ควรใช้อันไหนเมื่อไร
For 203 (Non-Authoritative Information): Check if a proxy is modifying the response. Access the origin directly if you need the original content. For 421 (Misdirected Request): Retry the request on a new connection.