Add verbose error messages

Not happy with the solution one bit but using error.rs at
https://blog.logrocket.com/create-an-async-crud-web-service-in-rust-with-warp/
was not working

Basically we just handcraft every single response on the spot, there is
some repetition and it's ugly but need to move on

1 files changed, 38 insertions, 0 deletions

diff --git a/src/error.rs b/src/error.rs
new file mode 100644
index 0000000..7339a06
--- /dev/null
+++ b/src/error.rs
@@ -0,0 +1,38 @@
+use log::warn;
+use serde::Serialize;
+use std::convert::Infallible;
+use warp::{http::StatusCode, Rejection, Reply};
+
+#[derive(Serialize)]
+struct ErrorResponse {
+    message: String,
+}
+
+pub async fn handle_rejection(err: Rejection) -> std::result::Result<impl Reply, Infallible> {
+    let code;
+    let message;
+
+    if err.is_not_found() {
+        code = StatusCode::NOT_FOUND;
+        message = "Requested resource is not found";
+    } else if let Some(_) = err.find::<warp::filters::body::BodyDeserializeError>() {
+        code = StatusCode::BAD_REQUEST;
+        message = "Error: JSON body is not formatted correctly, check your payload";
+    } else if let Some(_) = err.find::<warp::reject::MissingHeader>() {
+        code = StatusCode::METHOD_NOT_ALLOWED;
+        message = "Error: Authorization header missing, cannot authorize";
+    } else if let Some(_) = err.find::<warp::reject::MethodNotAllowed>() {
+        code = StatusCode::METHOD_NOT_ALLOWED;
+        message = "Error: method not allowed on this endpoint";
+    } else {
+        warn!("unhandled error: {:?}", err);
+        code = StatusCode::INTERNAL_SERVER_ERROR;
+        message = "Internal Server Error";
+    }
+
+    let json = warp::reply::json(&ErrorResponse {
+        message: message.to_owned(),
+    });
+
+    Ok(warp::reply::with_status(json, code))
+}