HTTP 203 Non-Authoritative Information vs 451 Unavailable For Legal Reasons
HTTP 203 (Non-Authoritative Information) is a 2xx Success response, while 451 (Unavailable For Legal Reasons) 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, 451 means that the server is denying access to the resource as a consequence of a legal demand. Named after Ray Bradbury's Fahrenheit 451.
Descrição
The response payload has been modified by a transforming proxy from the origin server's 200 response.
Quando você o vê
When a proxy or CDN modifies the response body (e.g., adds headers, transforms content).
Como corrigir
Check if a proxy is modifying the response. Access the origin directly if you need the original content.
Descrição
The server is denying access to the resource as a consequence of a legal demand. Named after Ray Bradbury's Fahrenheit 451.
Quando você o vê
When content is blocked due to court orders, GDPR requests, or government censorship.
Como corrigir
No technical fix. The block is legally mandated. Contact the site operator for details.
Diferenças principais
203 is a 2xx Success response, while 451 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 451: The server is denying access to the resource as a consequence of a legal demand. Named after Ray Bradbury's Fahrenheit 451.
You encounter 203 when when a proxy or CDN modifies the response body (e.g., adds headers, transforms content).
You encounter 451 when when content is blocked due to court orders, GDPR requests, or government censorship.
Quando usar qual
For 203 (Non-Authoritative Information): Check if a proxy is modifying the response. Access the origin directly if you need the original content. For 451 (Unavailable For Legal Reasons): No technical fix. The block is legally mandated. Contact the site operator for details.