From 5dcc29bb1dfa614c573bb44bad6c3f8295e69b6c Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Stephan=20B=C3=B6sch-Plepelits?= <skunk@xover.mud.at>
Date: Sat, 10 Jun 2017 20:46:50 +0200
Subject: [PATCH] Handle transmission errors

---
 index.js                       | 11 +++++++++++
 src/OpenStreetBrowserLoader.js |  5 +++++
 2 files changed, 16 insertions(+)

diff --git a/index.js b/index.js
index dc235acb..e43d2ea1 100644
--- a/index.js
+++ b/index.js
@@ -23,8 +23,14 @@ window.onload = function() {
 
 
   OpenStreetBrowserLoader('index', function (err, category) {
+    if (err) {
+      alert(err)
+      return
+    }
+
     categories[category.id] = category
     category.addTo(map, document.getElementById('info'))
+
   })
 }
 
@@ -33,6 +39,11 @@ window.toggleCategory = function (id) {
     categories[id].toggle()
   } else {
     OpenStreetBrowserLoader(id, function (err, category) {
+      if (err) {
+        alert(err)
+        return
+      }
+
       categories[category.id] = category
       category.addTo(map, document.getElementById('category-' + id).lastChild)
     })
diff --git a/src/OpenStreetBrowserLoader.js b/src/OpenStreetBrowserLoader.js
index aec28437..aaebcb73 100644
--- a/src/OpenStreetBrowserLoader.js
+++ b/src/OpenStreetBrowserLoader.js
@@ -3,6 +3,11 @@ var OpenStreetBrowserCategory = require('./OpenStreetBrowserCategory')
 
 function OpenStreetBrowserLoader (id, callback) {
   function reqListener (req) {
+    if (req.status !== 200) {
+      console.log(req)
+      return callback(req.statusText, null)
+    }
+
     var data = JSON.parse(req.responseText)
 
     if (data.type && data.type === 'index') {