HTTP 203 Non-Authoritative Information vs 303 See Other
HTTP 203 (Non-Authoritative Information) is a 2xx Success response, while 303 (See Other) is a 3xx Redirection response. 203 indicates that the response payload has been modified by a transforming proxy from the origin server's 200 response. In contrast, 303 means that the server is redirecting to a different resource using GET, typically after a POST operation (Post/Redirect/Get pattern).
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 server is redirecting to a different resource using GET, typically after a POST operation (Post/Redirect/Get pattern).
เมื่อคุณพบเห็น
After form submissions to prevent resubmission on browser refresh.
วิธีแก้ไข
Follow the Location header with a GET request. This is intentional — part of the PRG pattern.
ความแตกต่างหลัก
203 is a 2xx Success response, while 303 is a 3xx Redirection response.
HTTP 203: The response payload has been modified by a transforming proxy from the origin server's 200 response.
HTTP 303: The server is redirecting to a different resource using GET, typically after a POST operation (Post/Redirect/Get pattern).
You encounter 203 when when a proxy or CDN modifies the response body (e.g., adds headers, transforms content).
You encounter 303 when after form submissions to prevent resubmission on browser refresh.
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 303 (See Other): Follow the Location header with a GET request. This is intentional — part of the PRG pattern.