JS Fetch API: Don't try to decode JSON if the status code isn't 200.HEADmaster

1 files changed, 11 insertions, 1 deletions

diff --git a/main.js b/main.js
index 88ac044..231f492 100644
--- a/main.js
+++ b/main.js
@@ -3870,7 +3870,14 @@ const [vectorLayers, featureOverlayLayer] = (function() {
       headers: {
         'Content-Type': 'application/json; charset=UTF-8'
       }
-    }).then((resp) => resp.json())
+    })
+      .then(function(resp) {
+        if (resp.status === 200) {
+          return resp.json();
+        } else {
+          throw new Error(`${resp.url} [${resp.status}]`);
+        }
+      })
       .then(function(data) {
         /* the data is received from the CGI in the order it was sent */
         /* TODO optimizations on the CGI would break the above assumption, so the
@@ -3916,6 +3923,9 @@ const [vectorLayers, featureOverlayLayer] = (function() {
           popover.tip.classList.remove('inprogress');
         }
       })
+      .catch(function(e) {
+        console.log(e);
+      })
       .finally(function() {
         document.body.classList.remove('inprogress');
       });