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use std::fmt::{self, Display};
use std::borrow::Cow;
use crate::ext::IntoOwned;
use crate::uri::{Origin, Authority, Absolute, Reference, Asterisk};
use crate::uri::error::{Error, TryFromUriError};
/// An `enum` encapsulating any of the possible URI variants.
///
/// # Usage
///
/// In Rocket, this type will rarely be used directly. Instead, you will
/// typically encounter URIs via the [`Origin`] type. This is because all
/// incoming requests accepted by Rocket contain URIs in origin-form.
///
/// ## Parsing
///
/// The `Uri` type implements a full, zero-allocation, zero-copy [RFC 7230]
/// compliant "request target" parser with limited liberties for real-world
/// deviations. In particular, the parser deviates as follows:
///
/// * It accepts `%` characters without two trailing hex-digits.
///
/// * It accepts the following additional unencoded characters in query parts,
/// to match real-world browser behavior:
///
/// `{`, `}`, `[`, `]`, `\`, `^`, <code>`</code>, `|`
///
/// To parse an `&str` into a `Uri`, use [`Uri::parse()`]. Alternatively, you
/// may also use the `TryFrom<&str>` and `TryFrom<String>` trait implementation.
/// To inspect the parsed type, match on the resulting `enum` and use the
/// methods of the internal structure.
///
/// [RFC 7230]: https://tools.ietf.org/html/rfc7230
#[derive(Debug, PartialEq, Clone)]
pub enum Uri<'a> {
/// An asterisk: exactly `*`.
Asterisk(Asterisk),
/// An origin URI.
Origin(Origin<'a>),
/// An authority URI.
Authority(Authority<'a>),
/// An absolute URI.
Absolute(Absolute<'a>),
/// A URI reference.
Reference(Reference<'a>),
}
impl<'a> Uri<'a> {
/// Parses the string `string` into a `Uri` of kind `T`.
///
/// This is identical to `T::parse(string).map(Uri::from)`.
///
/// `T` is typically one of [`Asterisk`], [`Origin`], [`Authority`],
/// [`Absolute`], or [`Reference`]. Parsing never allocates. Returns an
/// `Error` if `string` is not a valid URI of kind `T`.
///
/// To perform an ambiguous parse into _any_ valid URI type, use
/// [`Uri::parse_any()`].
///
/// # Example
///
/// ```rust
/// # #[macro_use] extern crate rocket;
/// use rocket::http::uri::{Uri, Origin};
///
/// // Parse a valid origin URI (note: in practice, use `Origin::parse()`).
/// let uri = Uri::parse::<Origin>("/a/b/c?query").expect("valid URI");
/// let origin = uri.origin().expect("origin URI");
/// assert_eq!(origin.path(), "/a/b/c");
/// assert_eq!(origin.query().unwrap(), "query");
///
/// // Prefer to use the `uri!()` macro for static inputs. The return value
/// // is of the specific type, not `Uri`.
/// let origin = uri!("/a/b/c?query");
/// assert_eq!(origin.path(), "/a/b/c");
/// assert_eq!(origin.query().unwrap(), "query");
///
/// // Invalid URIs fail to parse.
/// Uri::parse::<Origin>("foo bar").expect_err("invalid URI");
/// ```
pub fn parse<T>(string: &'a str) -> Result<Uri<'a>, Error<'_>>
where T: Into<Uri<'a>> + TryFrom<&'a str, Error = Error<'a>>
{
T::try_from(string).map(|v| v.into())
}
/// Parse `string` into a the "best fit" URI type.
///
/// Always prefer to use `uri!()` for statically known inputs.
///
/// Because URI parsing is ambiguous (that is, there isn't a one-to-one
/// mapping between strings and a URI type), the internal type returned by
/// this method _may_ not be the desired type. This method chooses the "best
/// fit" type for a given string by preferring to parse in the following
/// order:
///
/// * `Asterisk`
/// * `Origin`
/// * `Authority`
/// * `Absolute`
/// * `Reference`
///
/// Thus, even though `*` is a valid `Asterisk` _and_ `Reference` URI, it
/// will parse as an `Asterisk`.
///
/// # Example
///
/// ```rust
/// # #[macro_use] extern crate rocket;
/// use rocket::http::uri::{Uri, Origin, Reference};
///
/// // An absolute path is an origin _unless_ it contains a fragment.
/// let uri = Uri::parse_any("/a/b/c?query").expect("valid URI");
/// let origin = uri.origin().expect("origin URI");
/// assert_eq!(origin.path(), "/a/b/c");
/// assert_eq!(origin.query().unwrap(), "query");
///
/// let uri = Uri::parse_any("/a/b/c?query#fragment").expect("valid URI");
/// let reference = uri.reference().expect("reference URI");
/// assert_eq!(reference.path(), "/a/b/c");
/// assert_eq!(reference.query().unwrap(), "query");
/// assert_eq!(reference.fragment().unwrap(), "fragment");
///
/// // Prefer to use the `uri!()` macro for static inputs. The return type
/// // is the internal type, not `Uri`. The explicit type is not required.
/// let uri: Origin = uri!("/a/b/c?query");
/// let uri: Reference = uri!("/a/b/c?query#fragment");
/// ```
pub fn parse_any(string: &'a str) -> Result<Uri<'a>, Error<'_>> {
crate::parse::uri::from_str(string)
}
/// Returns the internal instance of `Origin` if `self` is a `Uri::Origin`.
/// Otherwise, returns `None`.
///
/// # Example
///
/// ```rust
/// # #[macro_use] extern crate rocket;
/// use rocket::http::uri::{Uri, Absolute, Origin};
///
/// let uri = Uri::parse::<Origin>("/a/b/c?query").expect("valid URI");
/// assert!(uri.origin().is_some());
///
/// let uri = Uri::from(uri!("/a/b/c?query"));
/// assert!(uri.origin().is_some());
///
/// let uri = Uri::parse::<Absolute>("https://rocket.rs").expect("valid URI");
/// assert!(uri.origin().is_none());
///
/// let uri = Uri::from(uri!("https://rocket.rs"));
/// assert!(uri.origin().is_none());
/// ```
pub fn origin(&self) -> Option<&Origin<'a>> {
match self {
Uri::Origin(ref inner) => Some(inner),
_ => None
}
}
/// Returns the internal instance of `Authority` if `self` is a
/// `Uri::Authority`. Otherwise, returns `None`.
///
/// # Example
///
/// ```rust
/// # #[macro_use] extern crate rocket;
/// use rocket::http::uri::{Uri, Absolute, Authority};
///
/// let uri = Uri::parse::<Authority>("user:pass@domain.com").expect("valid URI");
/// assert!(uri.authority().is_some());
///
/// let uri = Uri::from(uri!("user:pass@domain.com"));
/// assert!(uri.authority().is_some());
///
/// let uri = Uri::parse::<Absolute>("https://rocket.rs").expect("valid URI");
/// assert!(uri.authority().is_none());
///
/// let uri = Uri::from(uri!("https://rocket.rs"));
/// assert!(uri.authority().is_none());
/// ```
pub fn authority(&self) -> Option<&Authority<'a>> {
match self {
Uri::Authority(ref inner) => Some(inner),
_ => None
}
}
/// Returns the internal instance of `Absolute` if `self` is a
/// `Uri::Absolute`. Otherwise, returns `None`.
///
/// # Example
///
/// ```rust
/// # #[macro_use] extern crate rocket;
/// use rocket::http::uri::{Uri, Absolute, Origin};
///
/// let uri = Uri::parse::<Absolute>("http://rocket.rs").expect("valid URI");
/// assert!(uri.absolute().is_some());
///
/// let uri = Uri::from(uri!("http://rocket.rs"));
/// assert!(uri.absolute().is_some());
///
/// let uri = Uri::parse::<Origin>("/path").expect("valid URI");
/// assert!(uri.absolute().is_none());
///
/// let uri = Uri::from(uri!("/path"));
/// assert!(uri.absolute().is_none());
/// ```
pub fn absolute(&self) -> Option<&Absolute<'a>> {
match self {
Uri::Absolute(ref inner) => Some(inner),
_ => None
}
}
/// Returns the internal instance of `Reference` if `self` is a
/// `Uri::Reference`. Otherwise, returns `None`.
///
/// # Example
///
/// ```rust
/// # #[macro_use] extern crate rocket;
/// use rocket::http::uri::{Uri, Absolute, Reference};
///
/// let uri = Uri::parse::<Reference>("foo/bar").expect("valid URI");
/// assert!(uri.reference().is_some());
///
/// let uri = Uri::from(uri!("foo/bar"));
/// assert!(uri.reference().is_some());
///
/// let uri = Uri::parse::<Absolute>("https://rocket.rs").expect("valid URI");
/// assert!(uri.reference().is_none());
///
/// let uri = Uri::from(uri!("https://rocket.rs"));
/// assert!(uri.reference().is_none());
/// ```
pub fn reference(&self) -> Option<&Reference<'a>> {
match self {
Uri::Reference(ref inner) => Some(inner),
_ => None
}
}
}
pub(crate) unsafe fn as_utf8_unchecked(input: Cow<'_, [u8]>) -> Cow<'_, str> {
match input {
Cow::Borrowed(bytes) => Cow::Borrowed(std::str::from_utf8_unchecked(bytes)),
Cow::Owned(bytes) => Cow::Owned(String::from_utf8_unchecked(bytes))
}
}
// impl<'a> TryFrom<&'a str> for Uri<'a> {
// type Error = Error<'a>;
//
// #[inline]
// fn try_from(string: &'a str) -> Result<Uri<'a>, Self::Error> {
// Uri::parse(string)
// }
// }
//
// impl TryFrom<String> for Uri<'static> {
// type Error = Error<'static>;
//
// #[inline]
// fn try_from(string: String) -> Result<Uri<'static>, Self::Error> {
// // TODO: Potentially optimize this like `Origin::parse_owned`.
// Uri::parse(&string)
// .map(|u| u.into_owned())
// .map_err(|e| e.into_owned())
// }
// }
impl IntoOwned for Uri<'_> {
type Owned = Uri<'static>;
fn into_owned(self) -> Uri<'static> {
match self {
Uri::Origin(origin) => Uri::Origin(origin.into_owned()),
Uri::Authority(authority) => Uri::Authority(authority.into_owned()),
Uri::Absolute(absolute) => Uri::Absolute(absolute.into_owned()),
Uri::Reference(reference) => Uri::Reference(reference.into_owned()),
Uri::Asterisk(asterisk) => Uri::Asterisk(asterisk)
}
}
}
impl Display for Uri<'_> {
fn fmt(&self, f: &mut fmt::Formatter<'_>) -> fmt::Result {
match *self {
Uri::Origin(ref origin) => write!(f, "{}", origin),
Uri::Authority(ref authority) => write!(f, "{}", authority),
Uri::Absolute(ref absolute) => write!(f, "{}", absolute),
Uri::Reference(ref reference) => write!(f, "{}", reference),
Uri::Asterisk(ref asterisk) => write!(f, "{}", asterisk)
}
}
}
macro_rules! impl_uri_from {
($T:ident $(<$lt:lifetime>)?) => (
impl<'a> From<$T $(<$lt>)?> for Uri<'a> {
fn from(other: $T $(<$lt>)?) -> Uri<'a> {
Uri::$T(other)
}
}
impl<'a> TryFrom<Uri<'a>> for $T $(<$lt>)? {
type Error = TryFromUriError;
fn try_from(uri: Uri<'a>) -> Result<Self, Self::Error> {
match uri {
Uri::$T(inner) => Ok(inner),
_ => Err(TryFromUriError(()))
}
}
}
impl<'b, $($lt)?> PartialEq<$T $(<$lt>)?> for Uri<'b> {
fn eq(&self, other: &$T $(<$lt>)?) -> bool {
match self {
Uri::$T(inner) => inner == other,
_ => false
}
}
}
impl<'b, $($lt)?> PartialEq<Uri<'b>> for $T $(<$lt>)? {
fn eq(&self, other: &Uri<'b>) -> bool {
match other {
Uri::$T(inner) => inner == self,
_ => false
}
}
}
)
}
impl_uri_from!(Origin<'a>);
impl_uri_from!(Authority<'a>);
impl_uri_from!(Absolute<'a>);
impl_uri_from!(Reference<'a>);
impl_uri_from!(Asterisk);
/// Implements Serialize and Deserialize for any 'URI' looking type.
macro_rules! impl_serde {
($T:ty, $expected:literal) => {
#[cfg(feature = "serde")]
mod serde {
use std::fmt;
use std::marker::PhantomData;
use super::*;
use serde_::ser::{Serialize, Serializer};
use serde_::de::{Deserialize, Deserializer, Error, Visitor};
impl<'a> Serialize for $T {
fn serialize<S: Serializer>(&self, serializer: S) -> Result<S::Ok, S::Error> {
serializer.serialize_str(&self.to_string())
}
}
struct DeVisitor<'a>(PhantomData<&'a $T>);
impl<'de, 'a> Visitor<'de> for DeVisitor<'a> {
type Value = $T;
fn expecting(&self, formatter: &mut fmt::Formatter<'_>) -> fmt::Result {
write!(formatter, $expected)
}
fn visit_str<E: Error>(self, v: &str) -> Result<Self::Value, E> {
<$T>::parse_owned(v.to_string()).map_err(Error::custom)
}
fn visit_string<E: Error>(self, v: String) -> Result<Self::Value, E> {
<$T>::parse_owned(v).map_err(Error::custom)
}
}
impl<'a, 'de> Deserialize<'de> for $T {
fn deserialize<D: Deserializer<'de>>(deserializer: D) -> Result<Self, D::Error> {
deserializer.deserialize_str(DeVisitor(PhantomData))
}
}
}
};
}
/// Implements traits from `impl_base_traits` and IntoOwned for a URI.
macro_rules! impl_traits {
($T:ident, $($field:ident),* $(,)?) => {
impl_traits!($T [parse], $($field),*);
};
($T:ident [$partial_eq_parse:ident], $($field:ident),* $(,)?) => {
impl_base_traits!($T [$partial_eq_parse], $($field),*);
impl crate::ext::IntoOwned for $T<'_> {
type Owned = $T<'static>;
fn into_owned(self) -> $T<'static> {
$T {
source: self.source.into_owned(),
$($field: self.$field.into_owned()),*
}
}
}
}
}
/// Implements PartialEq, Eq, Hash, and TryFrom.
macro_rules! impl_base_traits {
($T:ident, $($field:ident),* $(,)?) => {
impl_base_traits!($T [parse], $($field),*);
};
($T:ident [$partial_eq_parse:ident], $($field:ident),* $(,)?) => {
impl std::convert::TryFrom<String> for $T<'static> {
type Error = Error<'static>;
fn try_from(value: String) -> Result<Self, Self::Error> {
$T::parse_owned(value)
}
}
// Because inference doesn't take `&String` to `&str`.
impl<'a> std::convert::TryFrom<&'a String> for $T<'a> {
type Error = Error<'a>;
fn try_from(value: &'a String) -> Result<Self, Self::Error> {
$T::parse(value.as_str())
}
}
impl<'a> std::convert::TryFrom<&'a str> for $T<'a> {
type Error = Error<'a>;
fn try_from(value: &'a str) -> Result<Self, Self::Error> {
$T::parse(value)
}
}
impl<'a, 'b> PartialEq<$T<'b>> for $T<'a> {
fn eq(&self, other: &$T<'b>) -> bool {
true $(&& self.$field() == other.$field())*
}
}
impl PartialEq<str> for $T<'_> {
fn eq(&self, string: &str) -> bool {
$T::$partial_eq_parse(string).map_or(false, |v| &v == self)
}
}
impl PartialEq<&str> for $T<'_> {
fn eq(&self, other: &&str) -> bool {
self.eq(*other)
}
}
impl PartialEq<$T<'_>> for str {
fn eq(&self, other: &$T<'_>) -> bool {
other.eq(self)
}
}
impl Eq for $T<'_> { }
impl std::hash::Hash for $T<'_> {
fn hash<H: std::hash::Hasher>(&self, state: &mut H) {
$(self.$field().hash(state);)*
}
}
}
}
mod tests {
#[test]
fn normalization() {
fn normalize(uri: &str) -> String {
use crate::uri::Uri;
match Uri::parse_any(uri).unwrap() {
Uri::Origin(uri) => uri.into_normalized().to_string(),
Uri::Absolute(uri) => uri.into_normalized().to_string(),
Uri::Reference(uri) => uri.into_normalized().to_string(),
uri => uri.to_string(),
}
}
assert_eq!(normalize("/#"), "/#");
assert_eq!(normalize("/"), "/");
assert_eq!(normalize("//"), "/");
assert_eq!(normalize("//////a/"), "/a/");
assert_eq!(normalize("//ab"), "/ab");
assert_eq!(normalize("//a"), "/a");
assert_eq!(normalize("/a/b///c"), "/a/b/c");
assert_eq!(normalize("/a/b///c/"), "/a/b/c/");
assert_eq!(normalize("/a///b/c/d///"), "/a/b/c/d/");
assert_eq!(normalize("/?"), "/?");
assert_eq!(normalize("/?foo"), "/?foo");
assert_eq!(normalize("/a/?"), "/a/?");
assert_eq!(normalize("/a/?foo"), "/a/?foo");
}
}