api: Add catchers

- Added catchers for 404, 422 and 500

Signed-off-by: supercmmetry <vishaals2000@gmail.com>

src/api/catchers/mod.rs

@@ -0,0 +1,34 @@
+use rocket::Rocket;
+use rocket::response::status;
+use rocket::http::Status;
+use rocket_contrib::json::Json;
+use serde_json::Value;
+
+#[catch(404)]
+fn not_found() -> status::Custom<Json<Value>> {
+    status::Custom(Status::NotFound, Json(json!({
+        "err":"route not found",
+        "msg": "The given route does not exist"
+    })))
+}
+
+#[catch(422)]
+fn unprocessable_entity() -> status::Custom<Json<Value>> {
+    status::Custom(Status::UnprocessableEntity, Json(json!({
+        "err":"failed to process entity",
+        "msg": "The given object could not be processed. This could be due to sending \
+         malformed or incomplete JSON objects in the request body."
+    })))
+}
+
+#[catch(500)]
+fn internal_server_error() -> status::Custom<Json<Value>> {
+    status::Custom(Status::NotFound, Json(json!({
+        "err":"internal server error",
+        "msg": "Something went wrong, try again"
+    })))
+}
+
+pub fn fuel(rocket: Rocket) -> Rocket {
+    rocket.register(catchers![not_found, unprocessable_entity, internal_server_error])
+}

src/main.rs

@@ -46,6 +46,7 @@ fn main() {
     let mut rocket = rocket::ignite();
 
     rocket = api::routes::fuel(rocket);
+    rocket = api::catchers::fuel(rocket);
 
     rocket.manage(utils::db::pool())
         .manage(logger)