Function decode_request_data

pub fn decode_request_data(
    domain: &str,
) -> Result<DecodedClientRoutingLabel, DecodeLengthError>

Returns a result containing either a DecodedClientRoutingLabel or a DecodeLengthError.

The decode function takes in a &str param: domain. This domain can be a FQDN or just the dns label generated by the encode_request_data function. It decodes the string and formats it into a DecodedClientRoutingLabel. If the client routing label is not the first DNS label or is not included in domain a DecodeLengthError will be returned.

Examples:

use amazon_cloudfront_client_routing_lib::decode_request_data;

// valid client routing label
let decoded_label = decode_request_data("abacaqdaaaaaaaamnjg3oubcyvrgm");
match decoded_label {
    Ok(data) => {
        assert_eq!([1, 2, 3, 0, 0, 0, 0, 0], data.client_subnet);
        assert_eq!(24, data.subnet_mask);
        assert_eq!(false, data.is_ipv6);
        assert_eq!(15319960192071419084, data.cgid);
    },
    Err(e) => panic!("Decoding error when there shouldn't be: {}", e)
};
 
// fqdn with valid client routing label
let decoded_label = decode_request_data("abacaqdaaaaaaaamnjg3oubcyvrgm.example.com");
match decoded_label {
    Ok(data) => {
        assert_eq!([1, 2, 3, 0, 0, 0, 0, 0], data.client_subnet);
        assert_eq!(24, data.subnet_mask);
        assert_eq!(false, data.is_ipv6);
        assert_eq!(15319960192071419084, data.cgid);
    },
    Err(e) => panic!("Decoding error when there shouldn't be: {}", e)
};
 
// fqdn with subdomain and valid client routing label
let decoded_label = decode_request_data("abacaqdaaaaaaaamnjg3oubcyvrgm.vod1.example.com");
match decoded_label {
    Ok(data) => {
        assert_eq!([1, 2, 3, 0, 0, 0, 0, 0], data.client_subnet);
        assert_eq!(24, data.subnet_mask);
        assert_eq!(false, data.is_ipv6);
        assert_eq!(15319960192071419084, data.cgid);
    },
    Err(e) => panic!("Decoding error when there shouldn't be: {}", e)
};
 
// fqdn without valid client routing label
let decoded_label = decode_request_data("example.com");
match decoded_label {
    Ok(data) => panic!("Should have thrown a DecodeLengthError"),
    Err(e) => {
        assert_eq!(format!("{}", e), "Passed 7 - expected 29 characters");
    }
};
 
// client routing label needs to be the first DNS label
let decoded_label = decode_request_data("vod1.abacaqdaaaaaaaamnjg3oubcyvrgm.example.com");
match decoded_label {
    Ok(data) => panic!("Should have thrown a DecodeLengthError"),
    Err(e) => {
        assert_eq!(format!("{}", e), "Passed 4 - expected 29 characters");
    }
};

// invalid
let decoded_label = decode_request_data("abacaqdaaaaaaaamnjg3oubcy"); // invalid length
match decoded_label {
    Ok(data) => panic!("Should have thrown a DecodeLengthError"),
    Err(e) => {
        assert_eq!(format!("{}", e), "Passed 25 - expected 29 characters");
    }
};