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Add some documentation

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This commit is contained in:
Quentin 2020-11-08 16:02:16 +01:00
parent 71721f5bcf
commit c78df603d7
1 changed files with 9 additions and 1 deletions
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10
src/web/web_server.rs
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@ -58,7 +58,15 @@ async fn handler(
Ok(Response::new(Body::from("hello world\n"))) Ok(Response::new(Body::from("hello world\n")))
} }
/// 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.
/// An example of a case where it does not work: [::1]:3902
/// Instead, we use the Uri module provided by Hyper that correctl parses this "authority" section
fn authority_to_host(authority: &str) -> Result<String, Error> { fn authority_to_host(authority: &str) -> Result<String, Error> {
// Hyper can not directly parse authority section so we build a fake URL
// that contains our authority section
let mut uri_str: String = "fake://".to_owned(); let mut uri_str: String = "fake://".to_owned();
uri_str.push_str(authority); uri_str.push_str(authority);
@ -66,7 +74,7 @@ fn authority_to_host(authority: &str) -> Result<String, Error> {
Ok(uri) => { Ok(uri) => {
let host = uri let host = uri
.host() .host()
.ok_or(Error::BadRequest(format!("Unable to extract host from authority as string")))?; .ok_or(Error::BadRequest(format!("Unable to extract host from authority")))?;
Ok(String::from(host)) Ok(String::from(host))
} }
_ => Err(Error::BadRequest(format!("Unable to parse authority (host HTTP header)"))), _ => Err(Error::BadRequest(format!("Unable to parse authority (host HTTP header)"))),