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|
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);
}
}
|
