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|
use super::character_classes::{
REG_NAME_NOT_PCT_ENCODED,
USER_INFO_NOT_PCT_ENCODED,
};
use super::codec::{decode_element, encode_element};
use super::context::Context;
use super::error::Error;
use super::parse_host_port::parse_host_port;
use super::validate_ipv6_address::validate_ipv6_address;
/// This is the optional part of a URI which governs the URI's namespace. It
/// typically contains a host name or IP address, and may also include a port
/// number and/or userinfo component.
///
/// # Examples
///
/// ## Parsing an Authority into its components
///
/// ```rust
/// # extern crate uri;
/// use uri::Authority;
///
/// # fn test() -> Result<(), uri::Error> {
/// let authority = Authority::parse("nobody@www.example.com:8080")?;
/// assert_eq!(Some("nobody".as_bytes()), authority.userinfo());
/// assert_eq!("www.example.com".as_bytes(), authority.host());
/// assert_eq!(Some(8080), authority.port());
/// # Ok(())
/// # }
/// ```
///
/// ## Generating a URI from its components
///
/// ```rust
/// # extern crate uri;
/// use uri::Authority;
///
/// # fn test() -> Result<(), uri::Error> {
/// let mut authority = Authority::default();
/// authority.set_userinfo(Some("nobody").map(Into::into));
/// authority.set_host("www.example.com");
/// authority.set_port(Some(8080));
/// assert_eq!("nobody@www.example.com:8080", authority.to_string());
/// # Ok(())
/// # }
/// ```
#[derive(Clone, Debug, Default, PartialEq)]
pub struct Authority {
userinfo: Option<Vec<u8>>,
host: Vec<u8>,
port: Option<u16>,
}
impl Authority {
/// Borrow the host name part of the Authority.
#[must_use = "why u no use host return value?"]
pub fn host(&self) -> &[u8] {
&self.host
}
/// Borrow the port number part of the Authority.
#[must_use = "why did you get the port number and then throw it away?"]
pub fn port(&self) -> Option<u16> {
self.port
}
/// Change the userinfo part of the Authority.
pub fn set_userinfo<T>(&mut self, userinfo: T)
where T: Into<Option<Vec<u8>>>
{
self.userinfo = userinfo.into();
}
/// Change the host name part of the Authority.
pub fn set_host<T>(&mut self, host: T)
where T: Into<Vec<u8>>
{
self.host = host.into();
}
/// Change the port number part of the Authority.
pub fn set_port(&mut self, port: Option<u16>) {
self.port = port;
}
/// Borrow the userinfo part of the Authority.
#[must_use = "security breach... security breach... userinfo not used"]
pub fn userinfo(&self) -> Option<&[u8]> {
self.userinfo.as_deref()
}
/// Interpret the given string as the Authority component of a URI,
/// separating its various subcomponents, returning an `Authority` value
/// containing them.
///
/// # Errors
///
/// There are many ways to screw up the Authority part of URI string, and
/// this function will let you know what's up by returning a variant of the
/// [`Error`](enum.Error.html) type.
#[must_use = "you parsed it; don't you want the results?"]
pub fn parse<T>(authority_string: T) -> Result<Self, Error>
where T: AsRef<str>
{
let (userinfo, host_port_string) = Self::parse_userinfo(authority_string.as_ref())?;
let (host, port) = parse_host_port(host_port_string)?;
Ok(Self{
userinfo,
host,
port,
})
}
fn parse_userinfo(authority: &str) -> Result<(Option<Vec<u8>>, &str), Error> {
Ok(match authority.find('@') {
Some(delimiter) => (
Some(
decode_element(
&authority[0..delimiter],
&USER_INFO_NOT_PCT_ENCODED,
Context::Userinfo
)?
),
&authority[delimiter+1..]
),
None => (
None,
authority
)
})
}
}
impl std::fmt::Display for Authority {
fn fmt(&self, f: &mut std::fmt::Formatter<'_>) -> std::fmt::Result {
if let Some(userinfo) = &self.userinfo {
write!(f, "{}@", encode_element(&userinfo, &USER_INFO_NOT_PCT_ENCODED))?;
}
let host_to_string = String::from_utf8(self.host.clone());
match host_to_string {
Ok(host_to_string) if validate_ipv6_address(&host_to_string).is_ok() => {
write!(f, "[{}]", host_to_string.to_ascii_lowercase())?;
},
_ => {
write!(f, "{}", encode_element(&self.host, ®_NAME_NOT_PCT_ENCODED))?;
}
}
if let Some(port) = self.port {
write!(f, ":{}", port)?;
}
Ok(())
}
}
|
