add service monitors

harmony_macros/src/lib.rs

@@ -133,6 +133,26 @@ pub fn ingress_path(input: TokenStream) -> TokenStream {
     }
 }
 
+/// Verify that a string is a valid http scheme
+/// Panics if not http or https
+#[proc_macro]
+pub fn http_scheme(input: TokenStream) -> TokenStream {
+    let input = parse_macro_input!(input as LitStr);
+    let scheme_str = input.value();
+
+    if scheme_str.to_lowercase() == "http" {
+        let expanded = quote! {(#scheme_str.to_lowercase().to_string()) };
+        return TokenStream::from(expanded);
+    }
+
+    if scheme_str.to_lowercase() == "https" {
+        let expanded = quote! {(#scheme_str.to_lowercase().to_string()) };
+        return TokenStream::from(expanded);
+    }
+
+    panic!("Invalid HTTP scheme")
+}
+
 #[proc_macro]
 pub fn cidrv4(input: TokenStream) -> TokenStream {
     let input = parse_macro_input!(input as LitStr);