HTTP 414 URI Too Long vs 451 Unavailable For Legal Reasons
Both HTTP 414 (URI Too Long) and 451 (Unavailable For Legal Reasons) belong to the 4xx Client Error category. 414 indicates that the URI provided was too long for the server to process. Meanwhile, 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.
Description
The URI provided was too long for the server to process.
When You See It
When query strings are extremely long or when accidentally sending a request body in the URL.
How to Fix
Shorten the URL. Move long parameters to the request body using POST instead of GET.
Description
The server is denying access to the resource as a consequence of a legal demand. Named after Ray Bradbury's Fahrenheit 451.
When You See It
When content is blocked due to court orders, GDPR requests, or government censorship.
How to Fix
No technical fix. The block is legally mandated. Contact the site operator for details.
Key Differences
HTTP 414: The URI provided was too long for the server to process.
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 414 when when query strings are extremely long or when accidentally sending a request body in the URL.
You encounter 451 when when content is blocked due to court orders, GDPR requests, or government censorship.
When to Use Which
For 414 (URI Too Long): Shorten the URL. Move long parameters to the request body using POST instead of GET. For 451 (Unavailable For Legal Reasons): No technical fix. The block is legally mandated. Contact the site operator for details.