HTTP 203 Non-Authoritative Information vs 401 Unauthorized
HTTP 203 (Non-Authoritative Information) is a 2xx Success response, while 401 (Unauthorized) 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, 401 means that the request requires user authentication. The response includes a WWW-Authenticate header indicating the authentication scheme.
説明
The response payload has been modified by a transforming proxy from the origin server's 200 response.
このコードが表示される場合
When a proxy or CDN modifies the response body (e.g., adds headers, transforms content).
解決方法
Check if a proxy is modifying the response. Access the origin directly if you need the original content.
説明
The request requires user authentication. The response includes a WWW-Authenticate header indicating the authentication scheme.
このコードが表示される場合
When accessing a protected resource without credentials or with expired tokens.
解決方法
Include valid authentication credentials (API key, Bearer token, Basic auth) in the Authorization header.
主な違い
203 is a 2xx Success response, while 401 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 401: The request requires user authentication. The response includes a WWW-Authenticate header indicating the authentication scheme.
You encounter 203 when when a proxy or CDN modifies the response body (e.g., adds headers, transforms content).
You encounter 401 when when accessing a protected resource without credentials or with expired tokens.
どちらをいつ使うか
For 203 (Non-Authoritative Information): Check if a proxy is modifying the response. Access the origin directly if you need the original content. For 401 (Unauthorized): Include valid authentication credentials (API key, Bearer token, Basic auth) in the Authorization header.