ruma_identifiers_validation/
server_name.rs

1use crate::error::Error;
2
3pub fn validate(server_name: &str) -> Result<(), Error> {
4    use std::net::Ipv6Addr;
5
6    if server_name.is_empty() {
7        return Err(Error::InvalidServerName);
8    }
9
10    let end_of_host = if server_name.starts_with('[') {
11        let Some(end_of_ipv6) = server_name.find(']') else {
12            return Err(Error::InvalidServerName);
13        };
14
15        if server_name[1..end_of_ipv6].parse::<Ipv6Addr>().is_err() {
16            return Err(Error::InvalidServerName);
17        }
18
19        end_of_ipv6 + 1
20    } else {
21        #[allow(clippy::unnecessary_lazy_evaluations)]
22        let end_of_host = server_name.find(':').unwrap_or_else(|| server_name.len());
23
24        if server_name[..end_of_host]
25            .bytes()
26            .any(|byte| !(byte.is_ascii_alphanumeric() || byte == b'-' || byte == b'.'))
27        {
28            return Err(Error::InvalidServerName);
29        }
30
31        end_of_host
32    };
33
34    if server_name.len() != end_of_host
35        && (
36            // hostname is followed by something other than ":port"
37            server_name.as_bytes()[end_of_host] != b':'
38            // the remaining characters after ':' are not a valid port
39            || server_name[end_of_host + 1..].parse::<u16>().is_err()
40        )
41    {
42        Err(Error::InvalidServerName)
43    } else {
44        Ok(())
45    }
46}
ruma_identifiers_validation/server_name.rs

ruma_identifiers_validation/
server_name.rs
