Function is_localhost_origin 

pub fn is_localhost_origin(origin: &HeaderValue) -> bool

Checks if the given origin is a localhost origin.

Valid Origins

• http://localhost (any port)
• http://127.0.0.1 (any port)
• https://localhost (any port, for secure contexts)
• https://127.0.0.1 (any port)

Invalid Origins

• External domains (e.g., http://example.com)
• Other private IPs (e.g., http://192.168.1.1)
• IPv6 localhost (currently not supported)

Arguments

• origin - The Origin header value to check

Returns

true if the origin is a valid localhost origin, false otherwise.

Example

use http::header::HeaderValue;
use reasonkit_web::cors::is_localhost_origin;

let origin = HeaderValue::from_static("http://localhost:3000");
assert!(is_localhost_origin(&origin));

let external = HeaderValue::from_static("http://example.com");
assert!(!is_localhost_origin(&external));