HTTP 203 Non-Authoritative Information vs 400 Bad Request
HTTP 203 (Non-Authoritative Information) is a 2xx Success response, while 400 (Bad 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, 400 means that the server cannot process the request due to malformed syntax, invalid request message framing, or deceptive request routing.
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 server cannot process the request due to malformed syntax, invalid request message framing, or deceptive request routing.
このコードが表示される場合
When sending malformed JSON, missing required fields, or invalid query parameters.
解決方法
Check the request body format, validate all required fields, and ensure proper encoding.
主な違い
203 is a 2xx Success response, while 400 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 400: The server cannot process the request due to malformed syntax, invalid request message framing, or deceptive request routing.
You encounter 203 when when a proxy or CDN modifies the response body (e.g., adds headers, transforms content).
You encounter 400 when when sending malformed JSON, missing required fields, or invalid query parameters.
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 400 (Bad Request): Check the request body format, validate all required fields, and ensure proper encoding.