HTTP 103 Early Hints vs 303 See Other
HTTP 103 (Early Hints) is a 1xx Informational response, while 303 (See Other) is a 3xx Redirection 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, 303 means that the server is redirecting to a different resource using GET, typically after a POST operation (Post/Redirect/Get pattern).
คำอธิบาย
Used to return some response headers before the final HTTP message. Allows the browser to start preloading resources while the server prepares the response.
เมื่อคุณพบเห็น
When a server wants the browser to start loading CSS/JS before the full response is ready.
วิธีแก้ไข
No fix needed. This optimization helps speed up page loading.
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
103 is a 1xx Informational response, while 303 is a 3xx Redirection 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 303: The server is redirecting to a different resource using GET, typically after a POST operation (Post/Redirect/Get pattern).
You encounter 103 when when a server wants the browser to start loading CSS/JS before the full response is ready.
You encounter 303 when after form submissions to prevent resubmission on browser refresh.
ควรใช้อันไหนเมื่อไร
For 103 (Early Hints): No fix needed. This optimization helps speed up page loading. For 303 (See Other): Follow the Location header with a GET request. This is intentional — part of the PRG pattern.