reorganize backend

src-tauri/src/errors.rs

@@ -0,0 +1,52 @@
+use std::fmt::{Display, Formatter};
+use std::convert::From;
+use std::str::Utf8Error;
+
+
+// error when attempting to tell a request handler whether to release or deny crednetials
+pub enum SendResponseError {
+    NotFound, // no request with the given id
+    Abandoned, // request has already been closed by client
+}
+
+impl Display for SendResponseError {
+    fn fmt(&self, f: &mut Formatter) -> Result<(), std::fmt::Error> {
+        use SendResponseError::*;
+        match self {
+            NotFound => write!(f, "The specified command was not found."),
+            Abandoned => write!(f, "The specified request was closed by the client."),
+        }
+    }
+}
+
+
+// errors encountered while handling an HTTP request
+pub enum RequestError {
+    StreamIOError(std::io::Error),
+    InvalidUtf8,
+    MalformedHttpRequest,
+    RequestTooLarge,
+}
+
+impl From<tokio::io::Error> for RequestError {
+    fn from(e: std::io::Error) -> RequestError {
+        RequestError::StreamIOError(e)
+    }
+}
+impl From<Utf8Error> for RequestError {
+    fn from(_e: Utf8Error) -> RequestError {
+        RequestError::InvalidUtf8
+    }
+}
+
+impl Display for RequestError {
+    fn fmt(&self, f: &mut Formatter) -> Result<(), std::fmt::Error> {
+        use RequestError::*;
+        match self {
+            StreamIOError(e) => write!(f, "Stream IO error: {e}"),
+            InvalidUtf8 => write!(f, "Could not decode UTF-8 from bytestream"),
+            MalformedHttpRequest => write!(f, "Maformed HTTP request"),
+            RequestTooLarge => write!(f, "HTTP request too large"),
+        }
+    }
+}