derive std::error::Error for ProxyError

Cargo.toml

@@ -27,6 +27,7 @@ hyper = { version = "0.14.18", features = ["client"] }
 lazy_static = "1.4.0"
 tokio = { version = "1.17.0", features = ["io-util", "rt"] }
 tracing = "0.1.34"
+thiserror = "1.0"
 
 [dev-dependencies]
 hyper = { version = "0.14.18", features = ["server"] }

src/lib.rs

@@ -118,6 +118,7 @@ use hyper::upgrade::OnUpgrade;
 use hyper::{Body, Client, Error, Request, Response, StatusCode};
 use lazy_static::lazy_static;
 use std::net::IpAddr;
+use thiserror::Error as ThisError;
 use tokio::io::copy_bidirectional;
 
 lazy_static! {
@@ -142,26 +143,18 @@ lazy_static! {
     static ref X_FORWARDED_FOR: HeaderName = HeaderName::from_static("x-forwarded-for");
 }
 
-#[derive(Debug)]
+#[derive(Debug, ThisError)]
 pub enum ProxyError {
-    InvalidUri(InvalidUri),
-    HyperError(Error),
+    #[error("{0}")]
+    InvalidUri(#[from] InvalidUri),
+    #[error("{0}")]
+    HyperError(#[from] Error),
+    #[error("ForwardHeaderError")]
     ForwardHeaderError,
+    #[error("UpgradeError: {0}")]
     UpgradeError(String),
 }
 
-impl From<Error> for ProxyError {
-    fn from(err: Error) -> ProxyError {
-        ProxyError::HyperError(err)
-    }
-}
-
-impl From<InvalidUri> for ProxyError {
-    fn from(err: InvalidUri) -> ProxyError {
-        ProxyError::InvalidUri(err)
-    }
-}
-
 impl From<ToStrError> for ProxyError {
     fn from(_err: ToStrError) -> ProxyError {
         ProxyError::ForwardHeaderError