use crate::Error; use idna::domain_to_unicode; /// Host to bucket /// /// Convert a host, like "bucket.garage-site.tld" to the corresponding bucket "bucket", /// considering that ".garage-site.tld" is the "root domain". For domains not matching /// the provided root domain, no bucket is returned /// This behavior has been chosen to follow AWS S3 semantic. pub fn host_to_bucket<'a>(host: &'a str, root: &str) -> Option<&'a str> { let root = root.trim_start_matches('.'); let label_root = root.chars().filter(|c| c == &'.').count() + 1; let root = root.rsplit('.'); let mut host = host.rsplitn(label_root + 1, '.'); for root_part in root { let host_part = host.next()?; if root_part != host_part { return None; } } host.next() } /// Extract host from the authority section given by the HTTP host header /// /// The HTTP host contains both a host and a port. /// Extracting the port is more complex than just finding the colon (:) symbol due to IPv6 /// We do not use the collect pattern as there is no way in std rust to collect over a stack allocated value /// check here: <https://docs.rs/collect_slice/1.2.0/collect_slice/> pub fn authority_to_host(authority: &str) -> Result<String, Error> { let mut iter = authority.chars().enumerate(); let (_, first_char) = iter .next() .ok_or_else(|| Error::BadRequest("Authority is empty".to_string()))?; let split = match first_char { '[' => { let mut iter = iter.skip_while(|(_, c)| c != &']'); match iter.next() { Some((_, ']')) => iter.next(), _ => { return Err(Error::BadRequest(format!( "Authority {} has an illegal format", authority ))) } } } _ => iter.find(|(_, c)| *c == ':'), }; let authority = match split { Some((i, ':')) => Ok(&authority[..i]), None => Ok(authority), Some((_, _)) => Err(Error::BadRequest(format!( "Authority {} has an illegal format", authority ))), }; authority.map(|h| domain_to_unicode(h).0) } #[cfg(test)] mod tests { use super::*; #[test] fn authority_to_host_with_port() -> Result<(), Error> { let domain = authority_to_host("[::1]:3902")?; assert_eq!(domain, "[::1]"); let domain2 = authority_to_host("garage.tld:65200")?; assert_eq!(domain2, "garage.tld"); let domain3 = authority_to_host("127.0.0.1:80")?; assert_eq!(domain3, "127.0.0.1"); Ok(()) } #[test] fn authority_to_host_without_port() -> Result<(), Error> { let domain = authority_to_host("[::1]")?; assert_eq!(domain, "[::1]"); let domain2 = authority_to_host("garage.tld")?; assert_eq!(domain2, "garage.tld"); let domain3 = authority_to_host("127.0.0.1")?; assert_eq!(domain3, "127.0.0.1"); assert!(authority_to_host("[").is_err()); assert!(authority_to_host("[hello").is_err()); Ok(()) } #[test] fn host_to_bucket_test() { assert_eq!( host_to_bucket("john.doe.garage.tld", ".garage.tld").unwrap(), "john.doe" ); assert_eq!( host_to_bucket("john.doe.garage.tld", "garage.tld").unwrap(), "john.doe" ); assert_eq!(host_to_bucket("john.doe.com", "garage.tld"), None); assert_eq!(host_to_bucket("john.doe.com", ".garage.tld"), None); assert_eq!(host_to_bucket("garage.tld", "garage.tld"), None); assert_eq!(host_to_bucket("garage.tld", ".garage.tld"), None); assert_eq!(host_to_bucket("not-garage.tld", "garage.tld"), None); assert_eq!(host_to_bucket("not-garage.tld", ".garage.tld"), None); } }