error response for io::Error

src/error.rs

@@ -1,5 +1,5 @@
 //! Error and Result module
-use std::{fmt, result};
+use std::{io, fmt, result};
 use std::str::Utf8Error;
 use std::string::FromUtf8Error;
 use std::io::Error as IoError;
@@ -92,7 +92,19 @@ impl ResponseError for JsonError {}
 impl ResponseError for HttpError {}
 
 /// Return `InternalServerError` for `io::Error`
-impl ResponseError for IoError {}
+impl ResponseError for io::Error {
+
+    fn error_response(&self) -> HttpResponse {
+        match self.kind() {
+            io::ErrorKind::NotFound =>
+                HttpResponse::new(StatusCode::NOT_FOUND, Body::Empty),
+            io::ErrorKind::PermissionDenied =>
+                HttpResponse::new(StatusCode::FORBIDDEN, Body::Empty),
+            _ =>
+                HttpResponse::new(StatusCode::INTERNAL_SERVER_ERROR, Body::Empty)
+        }
+    }
+}
 
 /// `InternalServerError` for `InvalidHeaderValue`
 impl ResponseError for header::InvalidHeaderValue {}

src/recognizer.rs

@@ -172,7 +172,7 @@ macro_rules! FROM_STR {
             type Err = BadRequest<<$type as FromStr>::Err>;
 
             fn from_param(val: &str) -> Result<Self, Self::Err> {
-                <$type as FromStr>::from_str(val).map_err(|e| BadRequest(e))
+                <$type as FromStr>::from_str(val).map_err(BadRequest)
             }
         }
     }

src/staticfiles.rs

@@ -11,7 +11,7 @@ use mime_guess::get_mime_type;
 use route::Handler;
 use httprequest::HttpRequest;
 use httpresponse::HttpResponse;
-use httpcodes::{HTTPOk, HTTPNotFound, HTTPForbidden};
+use httpcodes::{HTTPOk, HTTPNotFound};
 
 /// Static files handling
 ///
@@ -149,26 +149,10 @@ impl<S> Handler<S> for StaticFiles {
 
             // full filepath
             let idx = if filepath.starts_with('/') { 1 } else { 0 };
-            let filename = match self.directory.join(&filepath[idx..]).canonicalize() {
-                Ok(fname) => fname,
-                Err(err) => return match err.kind() {
-                    io::ErrorKind::NotFound => Ok(HTTPNotFound.into()),
-                    io::ErrorKind::PermissionDenied => Ok(HTTPForbidden.into()),
-                    _ => Err(err),
-                }
-            };
+            let filename = self.directory.join(&filepath[idx..]).canonicalize()?;
 
             if filename.is_dir() {
-                match self.index(
-                    &req.path()[..req.prefix_len()], &filepath[idx..], &filename)
-                {
-                    Ok(resp) => Ok(resp),
-                    Err(err) => match err.kind() {
-                        io::ErrorKind::NotFound => Ok(HTTPNotFound.into()),
-                        io::ErrorKind::PermissionDenied => Ok(HTTPForbidden.into()),
-                        _ => Err(err),
-                    }
-                }
+                self.index(&req.path()[..req.prefix_len()], &filepath[idx..], &filename)
             } else {
                 let mut resp = HTTPOk.build();
                 if let Some(ext) = filename.extension() {