chore: add vendor directory

1 files changed, 329 insertions, 0 deletions

diff --git a/vendor/http/src/extensions.rs b/vendor/http/src/extensions.rs
new file mode 100644
index 00000000..f16d762e
--- /dev/null
+++ b/vendor/http/src/extensions.rs
@@ -0,0 +1,329 @@
+use std::any::{Any, TypeId};
+use std::collections::HashMap;
+use std::fmt;
+use std::hash::{BuildHasherDefault, Hasher};
+
+type AnyMap = HashMap<TypeId, Box<dyn AnyClone + Send + Sync>, BuildHasherDefault<IdHasher>>;
+
+// With TypeIds as keys, there's no need to hash them. They are already hashes
+// themselves, coming from the compiler. The IdHasher just holds the u64 of
+// the TypeId, and then returns it, instead of doing any bit fiddling.
+#[derive(Default)]
+struct IdHasher(u64);
+
+impl Hasher for IdHasher {
+    fn write(&mut self, _: &[u8]) {
+        unreachable!("TypeId calls write_u64");
+    }
+
+    #[inline]
+    fn write_u64(&mut self, id: u64) {
+        self.0 = id;
+    }
+
+    #[inline]
+    fn finish(&self) -> u64 {
+        self.0
+    }
+}
+
+/// A type map of protocol extensions.
+///
+/// `Extensions` can be used by `Request` and `Response` to store
+/// extra data derived from the underlying protocol.
+#[derive(Clone, Default)]
+pub struct Extensions {
+    // If extensions are never used, no need to carry around an empty HashMap.
+    // That's 3 words. Instead, this is only 1 word.
+    map: Option<Box<AnyMap>>,
+}
+
+impl Extensions {
+    /// Create an empty `Extensions`.
+    #[inline]
+    pub fn new() -> Extensions {
+        Extensions { map: None }
+    }
+
+    /// Insert a type into this `Extensions`.
+    ///
+    /// If a extension of this type already existed, it will
+    /// be returned and replaced with the new one.
+    ///
+    /// # Example
+    ///
+    /// ```
+    /// # use http::Extensions;
+    /// let mut ext = Extensions::new();
+    /// assert!(ext.insert(5i32).is_none());
+    /// assert!(ext.insert(4u8).is_none());
+    /// assert_eq!(ext.insert(9i32), Some(5i32));
+    /// ```
+    pub fn insert<T: Clone + Send + Sync + 'static>(&mut self, val: T) -> Option<T> {
+        self.map
+            .get_or_insert_with(Box::default)
+            .insert(TypeId::of::<T>(), Box::new(val))
+            .and_then(|boxed| boxed.into_any().downcast().ok().map(|boxed| *boxed))
+    }
+
+    /// Get a reference to a type previously inserted on this `Extensions`.
+    ///
+    /// # Example
+    ///
+    /// ```
+    /// # use http::Extensions;
+    /// let mut ext = Extensions::new();
+    /// assert!(ext.get::<i32>().is_none());
+    /// ext.insert(5i32);
+    ///
+    /// assert_eq!(ext.get::<i32>(), Some(&5i32));
+    /// ```
+    pub fn get<T: Send + Sync + 'static>(&self) -> Option<&T> {
+        self.map
+            .as_ref()
+            .and_then(|map| map.get(&TypeId::of::<T>()))
+            .and_then(|boxed| (**boxed).as_any().downcast_ref())
+    }
+
+    /// Get a mutable reference to a type previously inserted on this `Extensions`.
+    ///
+    /// # Example
+    ///
+    /// ```
+    /// # use http::Extensions;
+    /// let mut ext = Extensions::new();
+    /// ext.insert(String::from("Hello"));
+    /// ext.get_mut::<String>().unwrap().push_str(" World");
+    ///
+    /// assert_eq!(ext.get::<String>().unwrap(), "Hello World");
+    /// ```
+    pub fn get_mut<T: Send + Sync + 'static>(&mut self) -> Option<&mut T> {
+        self.map
+            .as_mut()
+            .and_then(|map| map.get_mut(&TypeId::of::<T>()))
+            .and_then(|boxed| (**boxed).as_any_mut().downcast_mut())
+    }
+
+    /// Get a mutable reference to a type, inserting `value` if not already present on this
+    /// `Extensions`.
+    ///
+    /// # Example
+    ///
+    /// ```
+    /// # use http::Extensions;
+    /// let mut ext = Extensions::new();
+    /// *ext.get_or_insert(1i32) += 2;
+    ///
+    /// assert_eq!(*ext.get::<i32>().unwrap(), 3);
+    /// ```
+    pub fn get_or_insert<T: Clone + Send + Sync + 'static>(&mut self, value: T) -> &mut T {
+        self.get_or_insert_with(|| value)
+    }
+
+    /// Get a mutable reference to a type, inserting the value created by `f` if not already present
+    /// on this `Extensions`.
+    ///
+    /// # Example
+    ///
+    /// ```
+    /// # use http::Extensions;
+    /// let mut ext = Extensions::new();
+    /// *ext.get_or_insert_with(|| 1i32) += 2;
+    ///
+    /// assert_eq!(*ext.get::<i32>().unwrap(), 3);
+    /// ```
+    pub fn get_or_insert_with<T: Clone + Send + Sync + 'static, F: FnOnce() -> T>(
+        &mut self,
+        f: F,
+    ) -> &mut T {
+        let out = self
+            .map
+            .get_or_insert_with(Box::default)
+            .entry(TypeId::of::<T>())
+            .or_insert_with(|| Box::new(f()));
+        (**out).as_any_mut().downcast_mut().unwrap()
+    }
+
+    /// Get a mutable reference to a type, inserting the type's default value if not already present
+    /// on this `Extensions`.
+    ///
+    /// # Example
+    ///
+    /// ```
+    /// # use http::Extensions;
+    /// let mut ext = Extensions::new();
+    /// *ext.get_or_insert_default::<i32>() += 2;
+    ///
+    /// assert_eq!(*ext.get::<i32>().unwrap(), 2);
+    /// ```
+    pub fn get_or_insert_default<T: Default + Clone + Send + Sync + 'static>(&mut self) -> &mut T {
+        self.get_or_insert_with(T::default)
+    }
+
+    /// Remove a type from this `Extensions`.
+    ///
+    /// If a extension of this type existed, it will be returned.
+    ///
+    /// # Example
+    ///
+    /// ```
+    /// # use http::Extensions;
+    /// let mut ext = Extensions::new();
+    /// ext.insert(5i32);
+    /// assert_eq!(ext.remove::<i32>(), Some(5i32));
+    /// assert!(ext.get::<i32>().is_none());
+    /// ```
+    pub fn remove<T: Send + Sync + 'static>(&mut self) -> Option<T> {
+        self.map
+            .as_mut()
+            .and_then(|map| map.remove(&TypeId::of::<T>()))
+            .and_then(|boxed| boxed.into_any().downcast().ok().map(|boxed| *boxed))
+    }
+
+    /// Clear the `Extensions` of all inserted extensions.
+    ///
+    /// # Example
+    ///
+    /// ```
+    /// # use http::Extensions;
+    /// let mut ext = Extensions::new();
+    /// ext.insert(5i32);
+    /// ext.clear();
+    ///
+    /// assert!(ext.get::<i32>().is_none());
+    /// ```
+    #[inline]
+    pub fn clear(&mut self) {
+        if let Some(ref mut map) = self.map {
+            map.clear();
+        }
+    }
+
+    /// Check whether the extension set is empty or not.
+    ///
+    /// # Example
+    ///
+    /// ```
+    /// # use http::Extensions;
+    /// let mut ext = Extensions::new();
+    /// assert!(ext.is_empty());
+    /// ext.insert(5i32);
+    /// assert!(!ext.is_empty());
+    /// ```
+    #[inline]
+    pub fn is_empty(&self) -> bool {
+        self.map.as_ref().map_or(true, |map| map.is_empty())
+    }
+
+    /// Get the number of extensions available.
+    ///
+    /// # Example
+    ///
+    /// ```
+    /// # use http::Extensions;
+    /// let mut ext = Extensions::new();
+    /// assert_eq!(ext.len(), 0);
+    /// ext.insert(5i32);
+    /// assert_eq!(ext.len(), 1);
+    /// ```
+    #[inline]
+    pub fn len(&self) -> usize {
+        self.map.as_ref().map_or(0, |map| map.len())
+    }
+
+    /// Extends `self` with another `Extensions`.
+    ///
+    /// If an instance of a specific type exists in both, the one in `self` is overwritten with the
+    /// one from `other`.
+    ///
+    /// # Example
+    ///
+    /// ```
+    /// # use http::Extensions;
+    /// let mut ext_a = Extensions::new();
+    /// ext_a.insert(8u8);
+    /// ext_a.insert(16u16);
+    ///
+    /// let mut ext_b = Extensions::new();
+    /// ext_b.insert(4u8);
+    /// ext_b.insert("hello");
+    ///
+    /// ext_a.extend(ext_b);
+    /// assert_eq!(ext_a.len(), 3);
+    /// assert_eq!(ext_a.get::<u8>(), Some(&4u8));
+    /// assert_eq!(ext_a.get::<u16>(), Some(&16u16));
+    /// assert_eq!(ext_a.get::<&'static str>().copied(), Some("hello"));
+    /// ```
+    pub fn extend(&mut self, other: Self) {
+        if let Some(other) = other.map {
+            if let Some(map) = &mut self.map {
+                map.extend(*other);
+            } else {
+                self.map = Some(other);
+            }
+        }
+    }
+}
+
+impl fmt::Debug for Extensions {
+    fn fmt(&self, f: &mut fmt::Formatter<'_>) -> fmt::Result {
+        f.debug_struct("Extensions").finish()
+    }
+}
+
+trait AnyClone: Any {
+    fn clone_box(&self) -> Box<dyn AnyClone + Send + Sync>;
+    fn as_any(&self) -> &dyn Any;
+    fn as_any_mut(&mut self) -> &mut dyn Any;
+    fn into_any(self: Box<Self>) -> Box<dyn Any>;
+}
+
+impl<T: Clone + Send + Sync + 'static> AnyClone for T {
+    fn clone_box(&self) -> Box<dyn AnyClone + Send + Sync> {
+        Box::new(self.clone())
+    }
+
+    fn as_any(&self) -> &dyn Any {
+        self
+    }
+
+    fn as_any_mut(&mut self) -> &mut dyn Any {
+        self
+    }
+
+    fn into_any(self: Box<Self>) -> Box<dyn Any> {
+        self
+    }
+}
+
+impl Clone for Box<dyn AnyClone + Send + Sync> {
+    fn clone(&self) -> Self {
+        (**self).clone_box()
+    }
+}
+
+#[test]
+fn test_extensions() {
+    #[derive(Clone, Debug, PartialEq)]
+    struct MyType(i32);
+
+    let mut extensions = Extensions::new();
+
+    extensions.insert(5i32);
+    extensions.insert(MyType(10));
+
+    assert_eq!(extensions.get(), Some(&5i32));
+    assert_eq!(extensions.get_mut(), Some(&mut 5i32));
+
+    let ext2 = extensions.clone();
+
+    assert_eq!(extensions.remove::<i32>(), Some(5i32));
+    assert!(extensions.get::<i32>().is_none());
+
+    // clone still has it
+    assert_eq!(ext2.get(), Some(&5i32));
+    assert_eq!(ext2.get(), Some(&MyType(10)));
+
+    assert_eq!(extensions.get::<bool>(), None);
+    assert_eq!(extensions.get(), Some(&MyType(10)));
+}