From 2bd776820f4c972d059d96491192a86dbfbd4440 Mon Sep 17 00:00:00 2001
From: Brandon Liu <bdon@bdon.org>
Date: Sat, 17 Jun 2023 09:34:06 +0800
Subject: [PATCH] surface exceptions to MapLibre protocol API [fixes #196]

---
 js/adapters.ts | 24 +++++++++++++++---------
 1 file changed, 15 insertions(+), 9 deletions(-)

diff --git a/js/adapters.ts b/js/adapters.ts
index de442d4..c49b678 100644
--- a/js/adapters.ts
+++ b/js/adapters.ts
@@ -123,14 +123,20 @@ export class Protocol {
 
       // TODO: create vector_layers if present to return valid TileJSON
 
-      instance.getHeader().then((h) => {
-        const tilejson = {
-          tiles: [params.url + "/{z}/{x}/{y}"],
-          minzoom: h.minZoom,
-          maxzoom: h.maxZoom,
-        };
-        callback(null, tilejson, null, null);
-      });
+      instance
+        .getHeader()
+        .then((h) => {
+          const tilejson = {
+            tiles: [params.url + "/{z}/{x}/{y}"],
+            minzoom: h.minZoom,
+            maxzoom: h.maxZoom,
+          };
+          callback(null, tilejson, null, null);
+        })
+        .catch((e) => {
+          callback(e, null, null, null);
+        });
+
       return {
         cancel: () => {},
       };
@@ -181,7 +187,7 @@ export class Protocol {
           })
           .catch((e) => {
             if ((e as Error).name !== "AbortError") {
-              throw e;
+              callback(e, null, null, null);
             }
           });
       });