diff --git a/core/lib/src/local/asynchronous/client.rs b/core/lib/src/local/asynchronous/client.rs
index 4cda65fc..4bf7dad2 100644
--- a/core/lib/src/local/asynchronous/client.rs
+++ b/core/lib/src/local/asynchronous/client.rs
@@ -1,10 +1,11 @@
-use std::borrow::Cow;
+use std::fmt;
+use std::convert::TryInto;
 
 use parking_lot::RwLock;
 
 use crate::local::asynchronous::{LocalRequest, LocalResponse};
 use crate::rocket::Rocket;
-use crate::http::{private::cookie, Method};
+use crate::http::{Method, uri::Origin, private::cookie};
 use crate::error::Error;
 
 /// An `async` client to construct and dispatch local requests.
@@ -97,9 +98,9 @@ impl Client {
 
     #[inline(always)]
     fn _req<'c, 'u: 'c, U>(&'c self, method: Method, uri: U) -> LocalRequest<'c>
-        where U: Into<Cow<'u, str>>
+        where U: TryInto<Origin<'u>> + fmt::Display
     {
-        LocalRequest::new(self, method, uri.into())
+        LocalRequest::new(self, method, uri)
     }
 
     // Generates the public API methods, which call the private methods above.
diff --git a/core/lib/src/local/asynchronous/request.rs b/core/lib/src/local/asynchronous/request.rs
index 4d6c12d4..a6333e43 100644
--- a/core/lib/src/local/asynchronous/request.rs
+++ b/core/lib/src/local/asynchronous/request.rs
@@ -1,7 +1,9 @@
-use std::borrow::Cow;
+use std::fmt;
+use std::convert::TryInto;
 
 use crate::{Request, Data};
-use crate::http::{Status, Method, uri::Origin, ext::IntoOwned};
+use crate::http::{Status, Method, ext::IntoOwned};
+use crate::http::uri::Origin;
 
 use super::{Client, LocalResponse};
 
@@ -33,18 +35,18 @@ pub struct LocalRequest<'c> {
     pub(in super) client: &'c Client,
     pub(in super) request: Request<'c>,
     data: Vec<u8>,
-    uri: Cow<'c, str>,
+    uri: Result<Origin<'c>, String>,
 }
 
 impl<'c> LocalRequest<'c> {
-    pub(crate) fn new(
-        client: &'c Client,
-        method: Method,
-        uri: Cow<'c, str>
-    ) -> LocalRequest<'c> {
+    pub(crate) fn new<'u: 'c, U>(client: &'c Client, method: Method, uri: U) -> Self
+        where U: TryInto<Origin<'u>> + fmt::Display
+    {
         // We try to validate the URI now so that the inner `Request` contains a
         // valid URI. If it doesn't, we set a dummy one.
-        let origin = Origin::parse(&uri).unwrap_or_else(|_| Origin::dummy());
+        let uri_string = uri.to_string();
+        let uri = uri.try_into().map_err(move |_| uri_string);
+        let origin = uri.clone().unwrap_or_else(|_| Origin::dummy());
         let mut request = Request::new(client.rocket(), method, origin.into_owned());
 
         // Add any cookies we know about.
@@ -77,8 +79,8 @@ impl<'c> LocalRequest<'c> {
         // from an error catcher) immediately if it's invalid. If it's valid,
         // then `request` already contains the correct URI.
         let rocket = self.client.rocket();
-        if let Err(_) = Origin::parse(&self.uri) {
-            error!("Malformed request URI: {}", self.uri);
+        if let Err(malformed) = self.uri {
+            error!("Malformed request URI: {}", malformed);
             return LocalResponse::new(self.request, move |req| {
                 rocket.handle_error(Status::BadRequest, req)
             }).await
diff --git a/core/lib/src/local/blocking/client.rs b/core/lib/src/local/blocking/client.rs
index 3a3f33ad..4dfd17c9 100644
--- a/core/lib/src/local/blocking/client.rs
+++ b/core/lib/src/local/blocking/client.rs
@@ -1,10 +1,11 @@
-use std::borrow::Cow;
+use std::fmt;
 use std::cell::RefCell;
+use std::convert::TryInto;
 
+use crate::Rocket;
 use crate::error::Error;
 use crate::local::{asynchronous, blocking::{LocalRequest, LocalResponse}};
-use crate::rocket::Rocket;
-use crate::http::Method;
+use crate::http::{Method, uri::Origin};
 
 /// A `blocking` client to construct and dispatch local requests.
 ///
@@ -78,14 +79,10 @@ impl Client {
     }
 
     #[inline(always)]
-    pub(crate) fn _req<'c, 'u: 'c, U>(
-        &'c self,
-        method: Method,
-        uri: U
-    ) -> LocalRequest<'c>
-        where U: Into<Cow<'u, str>>
+    fn _req<'c, 'u: 'c, U>(&'c self, method: Method, uri: U) -> LocalRequest<'c>
+        where U: TryInto<Origin<'u>> + fmt::Display
     {
-        LocalRequest::new(self, method, uri.into())
+        LocalRequest::new(self, method, uri)
     }
 
     // Generates the public API methods, which call the private methods above.
diff --git a/core/lib/src/local/blocking/request.rs b/core/lib/src/local/blocking/request.rs
index c9d9815e..32489118 100644
--- a/core/lib/src/local/blocking/request.rs
+++ b/core/lib/src/local/blocking/request.rs
@@ -1,6 +1,8 @@
-use std::borrow::Cow;
+use std::fmt;
+use std::convert::TryInto;
 
 use crate::{Request, http::Method, local::asynchronous};
+use crate::http::uri::Origin;
 
 use super::{Client, LocalResponse};
 
@@ -34,11 +36,9 @@ pub struct LocalRequest<'c> {
 
 impl<'c> LocalRequest<'c> {
     #[inline]
-    pub(crate) fn new(
-        client: &'c Client,
-        method: Method,
-        uri: Cow<'c, str>
-    ) -> LocalRequest<'c> {
+    pub(crate) fn new<'u: 'c, U>(client: &'c Client, method: Method, uri: U) -> Self
+        where U: TryInto<Origin<'u>> + fmt::Display
+    {
         let inner = asynchronous::LocalRequest::new(client.inner(), method, uri);
         Self { inner, client }
     }
diff --git a/core/lib/src/local/client.rs b/core/lib/src/local/client.rs
index a1eaa9cf..6c059dad 100644
--- a/core/lib/src/local/client.rs
+++ b/core/lib/src/local/client.rs
@@ -31,7 +31,7 @@ macro_rules! req_method {
         /// ```
         #[inline(always)]
         pub fn $f<'c, 'u: 'c, U>(&'c self, uri: U) -> LocalRequest<'c>
-            where U: Into<Cow<'u, str>>
+            where U: TryInto<Origin<'u>> + fmt::Display
         {
             self.req($method, uri)
         }
@@ -193,7 +193,7 @@ macro_rules! pub_client_impl {
         method: Method,
         uri: U
     ) -> LocalRequest<'c>
-        where U: Into<Cow<'u, str>>
+        where U: TryInto<Origin<'u>> + fmt::Display
     {
         self._req(method, uri)
     }