add error handling for hafas and efa requests

7 files changed, 83 insertions, 11 deletions

diff --git a/bin/nvm b/bin/nvm
index 74cf531..bc502ba 100755
--- a/bin/nvm
+++ b/bin/nvm
@@ -87,7 +87,10 @@ class EFA:
         async with aiohttp.ClientSession() as session:
             async with session.post(self.url, data=self.post_data) as response:
                 # EFA may return JSON with a text/html Content-Type, which response.json() does not like.
-                departures = json.loads(await response.text())
+                try:
+                    departures = json.loads(await response.text())
+                except json.decoder.JSONDecodeError:
+                    raise RuntimeError(response) from None
 
         return list(map(EFADeparture, departures["departureList"]))
 
@@ -288,16 +291,26 @@ async def show_departure_board(request, eva=None):
 
     efa_by_iso8601 = dict()
 
+    warning = None
     if len(departures) and ", " in station_name:
         name, place = station_name.split(", ")
         efa_endpoint = apis.get_efa(departures[0].location)
         if efa_endpoint:
             efa = EFA(efa_endpoint["endpoint"])
-            efa_departures = await efa.get_departures(place, name, now)
-            for departure in efa_departures:
-                if departure.iso8601 not in efa_by_iso8601:
-                    efa_by_iso8601[departure.iso8601] = list()
-                efa_by_iso8601[departure.iso8601].append(departure)
+            try:
+                efa_departures = await efa.get_departures(place, name, now)
+                for departure in efa_departures:
+                    if departure.iso8601 not in efa_by_iso8601:
+                        efa_by_iso8601[departure.iso8601] = list()
+                    efa_by_iso8601[departure.iso8601].append(departure)
+            except RuntimeError as e:
+                (response,) = e.args
+                text = await response.text()
+                warning = {
+                    "lead": "Detailabfrage fehlgeschlagen:",
+                    "body": "Angaben sind möglicherweise unvollständig",
+                    "code": f"""EFA server {efa_endpoint["endpoint"]} returned HTTP {response.status} '{text[:10224]}'""",
+                }
 
     for departure in departures:
         departure.add_efa(efa_by_iso8601.get(departure.iso8601, list()))
@@ -306,7 +319,9 @@ async def show_departure_board(request, eva=None):
 
     departure_board = env.get_template("departure_list.html")
     return web.Response(
-        body=departure_board.render(title=station_name, departures=departures),
+        body=departure_board.render(
+            title=station_name, departures=departures, warning=warning
+        ),
         headers=headers,
     )
 
@@ -314,9 +329,24 @@ async def show_departure_board(request, eva=None):
 async def redirect_to_departure_board(request):
     stop_name = request.query["name"]
     request_url = f"{db_rest_api}/locations?query={stop_name}&poi=false&addresses=false"
-    logging.debug(f"Requesting stops matcihng '{stop_name}' from {request_url}")
+    logging.debug(f"Requesting stops matching '{stop_name}' from {request_url}")
     async with aiohttp.ClientSession() as session:
         async with session.get(request_url) as response:
+            if response.status != 200:
+                error = await response.text()
+                landing_page = env.get_template("landing_page.html")
+                return web.Response(
+                    body=landing_page.render(
+                        title="NVM",
+                        error={
+                            "lead": "Haltestellensuche fehlgeschlagen",
+                            "body": "",
+                            "code": f"Server returned HTTP {response.status} '{error[:10224]}'",
+                        },
+                    ),
+                    headers=headers,
+                    status=500,
+                )
             stops = await response.json()
 
     for stop in stops:
@@ -348,6 +378,18 @@ async def ajax_geolocation(request):
     logging.debug(f"Requesting stops near {lat}/{lon} from {request_url}")
     async with aiohttp.ClientSession() as session:
         async with session.get(request_url) as response:
+            if response.status != 200:
+                text = await response.text()
+                return web.Response(
+                    body=json.dumps(
+                        {
+                            "error": True,
+                            "msg": f"HTTP {response.status} '{text[:1024]}'",
+                        }
+                    ),
+                    headers=ajax_headers,
+                    status=500,
+                )
             departures = await response.json()
     return web.Response(
         body=json.dumps(departures),
diff --git a/sass/app.scss b/sass/app.scss
index 73793ad..a4f6840 100644
--- a/sass/app.scss
+++ b/sass/app.scss
@@ -37,13 +37,19 @@ html {
 
 .warning {
 	padding: 15px;
-	margin-bottom: 20px;
 	border: 1px solid #faebcc;
 	border-radius: 4px;
 	color: #8a6d3b;
 	background-color: #fcf8e3;
 	margin-left: auto;
 	margin-right: auto;
+
+	.errcode {
+		font-family: Monospace;
+		margin-top: 2em;
+		font-size: 100%;
+		color: #aaaaaa;
+	}
 }
 
 .error {
diff --git a/static/v0/css/dark.min.css b/static/v0/css/dark.min.css
index 40255e2..b27cede 100644
--- a/static/v0/css/dark.min.css
+++ b/static/v0/css/dark.min.css
@@ -1 +1 @@
-body{margin:0;color:black;background-color:white}html{font-family:Sans-Serif}.container{max-width:60em;margin-left:auto;margin-right:auto}.globalnote{margin-top:1em;font-style:italic;text-align:center}.geolocation{margin-bottom:1em}.notice{padding:15px;margin-bottom:20px;border:1px solid #bce8f1;border-radius:4px;color:#31708f;background-color:#d9edf7;margin-left:auto;margin-right:auto}.warning{padding:15px;margin-bottom:20px;border:1px solid #faebcc;border-radius:4px;color:#8a6d3b;background-color:#fcf8e3;margin-left:auto;margin-right:auto}.error{padding:15px;margin-bottom:20px;border:1px solid #ebccd1;border-radius:4px;color:#a94442;background-color:#f2dede;margin-left:auto;margin-right:auto}.error strong{margin-right:.2em}.error .errcode{font-family:Monospace;margin-top:2em;font-size:100%;color:#aaaaaa}ul.stops{position:relative;width:100%;border-width:1px 2px;margin-bottom:5em;list-style-type:none;margin:0;padding:0}ul.stops a{text-decoration:none}ul.stops>li{display:block;height:4em;width:100%;position:relative;border-bottom:1px solid grey;background-color:white;cursor:pointer}ul.stops>li .name{position:absolute;bottom:0;left:5px;width:70%;overflow:hidden;background-color:transparent;font-size:150%;color:black}ul.stops>li .distance{position:absolute;top:1px;right:5px;width:30%;text-align:right;height:1.2em;overflow:hidden;opacity:50%}ul.stops>li .note{position:absolute;top:1px;left:0;width:70%;height:1.2em;overflow:hidden;opacity:50%}ul.stops>li .lines{position:absolute;bottom:0.1em;right:5px;background-color:transparent;font-weight:bold;font-size:120%}ul.stops>li .lines span{padding-left:0.1em;padding-right:0.1em;margin-left:0.2em}ul.stops>li .lines .longdistance{border:0.1em solid #ffcccc}ul.stops>li .lines .regional{background-color:#eeeeee}ul.stops>li .lines .tram{background-color:#ffcccc}ul.stops>li .lines .taxi{background-color:#eeaaee;font-weight:normal}ul.stops>li .lines .suburban{background-color:#aaffba;border-radius:30px}ul.stops>li .lines .subway{background-color:#aac0ff}ul.stops>li .lines .bus{background-color:#eeaaee;border-radius:10px}ul.departures{position:relative;width:100%;border-width:1px 2px;margin-bottom:5em;list-style-type:none;margin:0;padding:0}ul.departures>li{display:block;height:3em;width:100%;position:relative;cursor:pointer;border-bottom:1px solid grey;background-color:white}ul.departures>li.cancelled{background-color:#ffe7d0}ul.departures .line{position:absolute;bottom:2px;left:2px;max-width:6em;max-height:3ex;max-width:5em;overflow:hidden;font-size:120%;background-color:#eeeeee;font-weight:bold;padding-left:0.1em;padding-right:0.1em}ul.departures .longdistance{border:0.1em solid #ffcccc}ul.departures .tram{background-color:#ffcccc}ul.departures .suburban{background-color:#aaffba;border-radius:30px}ul.departures .subway{background-color:#aac0ff}ul.departures .bus{background-color:#eeaaee;border-radius:10px}ul.departures .dest{position:absolute;bottom:0;left:4em;width:70%;overflow:hidden;background-color:transparent;font-size:150%;color:black}ul.departures .destsuffix{position:absolute;top:1px;left:6.1em;width:70%;height:1.2em;overflow:hidden}ul.departures .time{position:absolute;right:5px;top:1px;background-color:transparent;padding-left:0.2em;color:black}ul.departures .time .delay{padding-right:1ex;color:#ff0000}ul.departures .platform{position:absolute;bottom:0;right:5px;overflow:hidden;background-color:transparent;font-size:140%;font-weight:bold;color:black}.navbar-fixed{position:relative;z-index:997}.navbar-fixed nav{position:fixed;width:100%;box-shadow:0 2px 2px 0 rgba(0,0,0,0.14),0 3px 1px -2px rgba(0,0,0,0.12),0 1px 5px 0 rgba(0,0,0,0.2);overflow:hidden}.navbar-fixed nav a{color:#ffffff}.navbar-fixed nav .container{position:relative;height:100%}.navbar-fixed nav .main{position:absolute;display:inline-block;padding-left:0.5rem}.navbar-fixed nav ul{float:right;margin:0;padding-left:0;list-style-type:none}.navbar-fixed nav ul li{float:left;padding:0;list-style-type:none;padding-left:.8em;padding-right:.8em}@font-face{font-family:'Material Icons';font-style:normal;font-weight:400;src:local("Material Icons"),local("MaterialIcons-Regular"),url(/static/v0/font/MaterialIcons-Regular.ttf) format("truetype")}.material-icons{font-family:'Material Icons';font-weight:normal;font-style:normal;font-size:24px;line-height:1;letter-spacing:normal;text-transform:none;display:inline-block;white-space:nowrap;word-wrap:normal;direction:ltr}@media only screen and (max-width: 600px){ul.departures>li,ul.stops>li{font-size:85%}.navbar-fixed{height:50px}nav{height:50px;line-height:50px}nav .main{font-size:120%}nav .material-icons{height:50px;line-height:50px}}@media only screen and (min-width: 600px){.navbar-fixed{height:60px}nav{height:60px;line-height:60px}nav .main{font-size:140%}nav .material-icons{height:60px;line-height:60px}}
+body{margin:0;color:black;background-color:white}html{font-family:Sans-Serif}.container{max-width:60em;margin-left:auto;margin-right:auto}.globalnote{margin-top:1em;font-style:italic;text-align:center}.geolocation{margin-bottom:1em}.notice{padding:15px;margin-bottom:20px;border:1px solid #bce8f1;border-radius:4px;color:#31708f;background-color:#d9edf7;margin-left:auto;margin-right:auto}.warning{padding:15px;border:1px solid #faebcc;border-radius:4px;color:#8a6d3b;background-color:#fcf8e3;margin-left:auto;margin-right:auto}.warning .errcode{font-family:Monospace;margin-top:2em;font-size:100%;color:#aaaaaa}.error{padding:15px;margin-bottom:20px;border:1px solid #ebccd1;border-radius:4px;color:#a94442;background-color:#f2dede;margin-left:auto;margin-right:auto}.error strong{margin-right:.2em}.error .errcode{font-family:Monospace;margin-top:2em;font-size:100%;color:#aaaaaa}ul.stops{position:relative;width:100%;border-width:1px 2px;margin-bottom:5em;list-style-type:none;margin:0;padding:0}ul.stops a{text-decoration:none}ul.stops>li{display:block;height:4em;width:100%;position:relative;border-bottom:1px solid grey;background-color:white;cursor:pointer}ul.stops>li .name{position:absolute;bottom:0;left:5px;width:70%;overflow:hidden;background-color:transparent;font-size:150%;color:black}ul.stops>li .distance{position:absolute;top:1px;right:5px;width:30%;text-align:right;height:1.2em;overflow:hidden;opacity:50%}ul.stops>li .note{position:absolute;top:1px;left:0;width:70%;height:1.2em;overflow:hidden;opacity:50%}ul.stops>li .lines{position:absolute;bottom:0.1em;right:5px;background-color:transparent;font-weight:bold;font-size:120%}ul.stops>li .lines span{padding-left:0.1em;padding-right:0.1em;margin-left:0.2em}ul.stops>li .lines .longdistance{border:0.1em solid #ffcccc}ul.stops>li .lines .regional{background-color:#eeeeee}ul.stops>li .lines .tram{background-color:#ffcccc}ul.stops>li .lines .taxi{background-color:#eeaaee;font-weight:normal}ul.stops>li .lines .suburban{background-color:#aaffba;border-radius:30px}ul.stops>li .lines .subway{background-color:#aac0ff}ul.stops>li .lines .bus{background-color:#eeaaee;border-radius:10px}ul.departures{position:relative;width:100%;border-width:1px 2px;margin-bottom:5em;list-style-type:none;margin:0;padding:0}ul.departures>li{display:block;height:3em;width:100%;position:relative;cursor:pointer;border-bottom:1px solid grey;background-color:white}ul.departures>li.cancelled{background-color:#ffe7d0}ul.departures .line{position:absolute;bottom:2px;left:2px;max-width:6em;max-height:3ex;max-width:5em;overflow:hidden;font-size:120%;background-color:#eeeeee;font-weight:bold;padding-left:0.1em;padding-right:0.1em}ul.departures .longdistance{border:0.1em solid #ffcccc}ul.departures .tram{background-color:#ffcccc}ul.departures .suburban{background-color:#aaffba;border-radius:30px}ul.departures .subway{background-color:#aac0ff}ul.departures .bus{background-color:#eeaaee;border-radius:10px}ul.departures .dest{position:absolute;bottom:0;left:4em;width:70%;overflow:hidden;background-color:transparent;font-size:150%;color:black}ul.departures .destsuffix{position:absolute;top:1px;left:6.1em;width:70%;height:1.2em;overflow:hidden}ul.departures .time{position:absolute;right:5px;top:1px;background-color:transparent;padding-left:0.2em;color:black}ul.departures .time .delay{padding-right:1ex;color:#ff0000}ul.departures .platform{position:absolute;bottom:0;right:5px;overflow:hidden;background-color:transparent;font-size:140%;font-weight:bold;color:black}.navbar-fixed{position:relative;z-index:997}.navbar-fixed nav{position:fixed;width:100%;box-shadow:0 2px 2px 0 rgba(0,0,0,0.14),0 3px 1px -2px rgba(0,0,0,0.12),0 1px 5px 0 rgba(0,0,0,0.2);overflow:hidden}.navbar-fixed nav a{color:#ffffff}.navbar-fixed nav .container{position:relative;height:100%}.navbar-fixed nav .main{position:absolute;display:inline-block;padding-left:0.5rem}.navbar-fixed nav ul{float:right;margin:0;padding-left:0;list-style-type:none}.navbar-fixed nav ul li{float:left;padding:0;list-style-type:none;padding-left:.8em;padding-right:.8em}@font-face{font-family:'Material Icons';font-style:normal;font-weight:400;src:local("Material Icons"),local("MaterialIcons-Regular"),url(/static/v0/font/MaterialIcons-Regular.ttf) format("truetype")}.material-icons{font-family:'Material Icons';font-weight:normal;font-style:normal;font-size:24px;line-height:1;letter-spacing:normal;text-transform:none;display:inline-block;white-space:nowrap;word-wrap:normal;direction:ltr}@media only screen and (max-width: 600px){ul.departures>li,ul.stops>li{font-size:85%}.navbar-fixed{height:50px}nav{height:50px;line-height:50px}nav .main{font-size:120%}nav .material-icons{height:50px;line-height:50px}}@media only screen and (min-width: 600px){.navbar-fixed{height:60px}nav{height:60px;line-height:60px}nav .main{font-size:140%}nav .material-icons{height:60px;line-height:60px}}
diff --git a/static/v0/css/light.min.css b/static/v0/css/light.min.css
index 40255e2..b27cede 100644
--- a/static/v0/css/light.min.css
+++ b/static/v0/css/light.min.css
@@ -1 +1 @@
-body{margin:0;color:black;background-color:white}html{font-family:Sans-Serif}.container{max-width:60em;margin-left:auto;margin-right:auto}.globalnote{margin-top:1em;font-style:italic;text-align:center}.geolocation{margin-bottom:1em}.notice{padding:15px;margin-bottom:20px;border:1px solid #bce8f1;border-radius:4px;color:#31708f;background-color:#d9edf7;margin-left:auto;margin-right:auto}.warning{padding:15px;margin-bottom:20px;border:1px solid #faebcc;border-radius:4px;color:#8a6d3b;background-color:#fcf8e3;margin-left:auto;margin-right:auto}.error{padding:15px;margin-bottom:20px;border:1px solid #ebccd1;border-radius:4px;color:#a94442;background-color:#f2dede;margin-left:auto;margin-right:auto}.error strong{margin-right:.2em}.error .errcode{font-family:Monospace;margin-top:2em;font-size:100%;color:#aaaaaa}ul.stops{position:relative;width:100%;border-width:1px 2px;margin-bottom:5em;list-style-type:none;margin:0;padding:0}ul.stops a{text-decoration:none}ul.stops>li{display:block;height:4em;width:100%;position:relative;border-bottom:1px solid grey;background-color:white;cursor:pointer}ul.stops>li .name{position:absolute;bottom:0;left:5px;width:70%;overflow:hidden;background-color:transparent;font-size:150%;color:black}ul.stops>li .distance{position:absolute;top:1px;right:5px;width:30%;text-align:right;height:1.2em;overflow:hidden;opacity:50%}ul.stops>li .note{position:absolute;top:1px;left:0;width:70%;height:1.2em;overflow:hidden;opacity:50%}ul.stops>li .lines{position:absolute;bottom:0.1em;right:5px;background-color:transparent;font-weight:bold;font-size:120%}ul.stops>li .lines span{padding-left:0.1em;padding-right:0.1em;margin-left:0.2em}ul.stops>li .lines .longdistance{border:0.1em solid #ffcccc}ul.stops>li .lines .regional{background-color:#eeeeee}ul.stops>li .lines .tram{background-color:#ffcccc}ul.stops>li .lines .taxi{background-color:#eeaaee;font-weight:normal}ul.stops>li .lines .suburban{background-color:#aaffba;border-radius:30px}ul.stops>li .lines .subway{background-color:#aac0ff}ul.stops>li .lines .bus{background-color:#eeaaee;border-radius:10px}ul.departures{position:relative;width:100%;border-width:1px 2px;margin-bottom:5em;list-style-type:none;margin:0;padding:0}ul.departures>li{display:block;height:3em;width:100%;position:relative;cursor:pointer;border-bottom:1px solid grey;background-color:white}ul.departures>li.cancelled{background-color:#ffe7d0}ul.departures .line{position:absolute;bottom:2px;left:2px;max-width:6em;max-height:3ex;max-width:5em;overflow:hidden;font-size:120%;background-color:#eeeeee;font-weight:bold;padding-left:0.1em;padding-right:0.1em}ul.departures .longdistance{border:0.1em solid #ffcccc}ul.departures .tram{background-color:#ffcccc}ul.departures .suburban{background-color:#aaffba;border-radius:30px}ul.departures .subway{background-color:#aac0ff}ul.departures .bus{background-color:#eeaaee;border-radius:10px}ul.departures .dest{position:absolute;bottom:0;left:4em;width:70%;overflow:hidden;background-color:transparent;font-size:150%;color:black}ul.departures .destsuffix{position:absolute;top:1px;left:6.1em;width:70%;height:1.2em;overflow:hidden}ul.departures .time{position:absolute;right:5px;top:1px;background-color:transparent;padding-left:0.2em;color:black}ul.departures .time .delay{padding-right:1ex;color:#ff0000}ul.departures .platform{position:absolute;bottom:0;right:5px;overflow:hidden;background-color:transparent;font-size:140%;font-weight:bold;color:black}.navbar-fixed{position:relative;z-index:997}.navbar-fixed nav{position:fixed;width:100%;box-shadow:0 2px 2px 0 rgba(0,0,0,0.14),0 3px 1px -2px rgba(0,0,0,0.12),0 1px 5px 0 rgba(0,0,0,0.2);overflow:hidden}.navbar-fixed nav a{color:#ffffff}.navbar-fixed nav .container{position:relative;height:100%}.navbar-fixed nav .main{position:absolute;display:inline-block;padding-left:0.5rem}.navbar-fixed nav ul{float:right;margin:0;padding-left:0;list-style-type:none}.navbar-fixed nav ul li{float:left;padding:0;list-style-type:none;padding-left:.8em;padding-right:.8em}@font-face{font-family:'Material Icons';font-style:normal;font-weight:400;src:local("Material Icons"),local("MaterialIcons-Regular"),url(/static/v0/font/MaterialIcons-Regular.ttf) format("truetype")}.material-icons{font-family:'Material Icons';font-weight:normal;font-style:normal;font-size:24px;line-height:1;letter-spacing:normal;text-transform:none;display:inline-block;white-space:nowrap;word-wrap:normal;direction:ltr}@media only screen and (max-width: 600px){ul.departures>li,ul.stops>li{font-size:85%}.navbar-fixed{height:50px}nav{height:50px;line-height:50px}nav .main{font-size:120%}nav .material-icons{height:50px;line-height:50px}}@media only screen and (min-width: 600px){.navbar-fixed{height:60px}nav{height:60px;line-height:60px}nav .main{font-size:140%}nav .material-icons{height:60px;line-height:60px}}
+body{margin:0;color:black;background-color:white}html{font-family:Sans-Serif}.container{max-width:60em;margin-left:auto;margin-right:auto}.globalnote{margin-top:1em;font-style:italic;text-align:center}.geolocation{margin-bottom:1em}.notice{padding:15px;margin-bottom:20px;border:1px solid #bce8f1;border-radius:4px;color:#31708f;background-color:#d9edf7;margin-left:auto;margin-right:auto}.warning{padding:15px;border:1px solid #faebcc;border-radius:4px;color:#8a6d3b;background-color:#fcf8e3;margin-left:auto;margin-right:auto}.warning .errcode{font-family:Monospace;margin-top:2em;font-size:100%;color:#aaaaaa}.error{padding:15px;margin-bottom:20px;border:1px solid #ebccd1;border-radius:4px;color:#a94442;background-color:#f2dede;margin-left:auto;margin-right:auto}.error strong{margin-right:.2em}.error .errcode{font-family:Monospace;margin-top:2em;font-size:100%;color:#aaaaaa}ul.stops{position:relative;width:100%;border-width:1px 2px;margin-bottom:5em;list-style-type:none;margin:0;padding:0}ul.stops a{text-decoration:none}ul.stops>li{display:block;height:4em;width:100%;position:relative;border-bottom:1px solid grey;background-color:white;cursor:pointer}ul.stops>li .name{position:absolute;bottom:0;left:5px;width:70%;overflow:hidden;background-color:transparent;font-size:150%;color:black}ul.stops>li .distance{position:absolute;top:1px;right:5px;width:30%;text-align:right;height:1.2em;overflow:hidden;opacity:50%}ul.stops>li .note{position:absolute;top:1px;left:0;width:70%;height:1.2em;overflow:hidden;opacity:50%}ul.stops>li .lines{position:absolute;bottom:0.1em;right:5px;background-color:transparent;font-weight:bold;font-size:120%}ul.stops>li .lines span{padding-left:0.1em;padding-right:0.1em;margin-left:0.2em}ul.stops>li .lines .longdistance{border:0.1em solid #ffcccc}ul.stops>li .lines .regional{background-color:#eeeeee}ul.stops>li .lines .tram{background-color:#ffcccc}ul.stops>li .lines .taxi{background-color:#eeaaee;font-weight:normal}ul.stops>li .lines .suburban{background-color:#aaffba;border-radius:30px}ul.stops>li .lines .subway{background-color:#aac0ff}ul.stops>li .lines .bus{background-color:#eeaaee;border-radius:10px}ul.departures{position:relative;width:100%;border-width:1px 2px;margin-bottom:5em;list-style-type:none;margin:0;padding:0}ul.departures>li{display:block;height:3em;width:100%;position:relative;cursor:pointer;border-bottom:1px solid grey;background-color:white}ul.departures>li.cancelled{background-color:#ffe7d0}ul.departures .line{position:absolute;bottom:2px;left:2px;max-width:6em;max-height:3ex;max-width:5em;overflow:hidden;font-size:120%;background-color:#eeeeee;font-weight:bold;padding-left:0.1em;padding-right:0.1em}ul.departures .longdistance{border:0.1em solid #ffcccc}ul.departures .tram{background-color:#ffcccc}ul.departures .suburban{background-color:#aaffba;border-radius:30px}ul.departures .subway{background-color:#aac0ff}ul.departures .bus{background-color:#eeaaee;border-radius:10px}ul.departures .dest{position:absolute;bottom:0;left:4em;width:70%;overflow:hidden;background-color:transparent;font-size:150%;color:black}ul.departures .destsuffix{position:absolute;top:1px;left:6.1em;width:70%;height:1.2em;overflow:hidden}ul.departures .time{position:absolute;right:5px;top:1px;background-color:transparent;padding-left:0.2em;color:black}ul.departures .time .delay{padding-right:1ex;color:#ff0000}ul.departures .platform{position:absolute;bottom:0;right:5px;overflow:hidden;background-color:transparent;font-size:140%;font-weight:bold;color:black}.navbar-fixed{position:relative;z-index:997}.navbar-fixed nav{position:fixed;width:100%;box-shadow:0 2px 2px 0 rgba(0,0,0,0.14),0 3px 1px -2px rgba(0,0,0,0.12),0 1px 5px 0 rgba(0,0,0,0.2);overflow:hidden}.navbar-fixed nav a{color:#ffffff}.navbar-fixed nav .container{position:relative;height:100%}.navbar-fixed nav .main{position:absolute;display:inline-block;padding-left:0.5rem}.navbar-fixed nav ul{float:right;margin:0;padding-left:0;list-style-type:none}.navbar-fixed nav ul li{float:left;padding:0;list-style-type:none;padding-left:.8em;padding-right:.8em}@font-face{font-family:'Material Icons';font-style:normal;font-weight:400;src:local("Material Icons"),local("MaterialIcons-Regular"),url(/static/v0/font/MaterialIcons-Regular.ttf) format("truetype")}.material-icons{font-family:'Material Icons';font-weight:normal;font-style:normal;font-size:24px;line-height:1;letter-spacing:normal;text-transform:none;display:inline-block;white-space:nowrap;word-wrap:normal;direction:ltr}@media only screen and (max-width: 600px){ul.departures>li,ul.stops>li{font-size:85%}.navbar-fixed{height:50px}nav{height:50px;line-height:50px}nav .main{font-size:120%}nav .material-icons{height:50px;line-height:50px}}@media only screen and (min-width: 600px){.navbar-fixed{height:60px}nav{height:60px;line-height:60px}nav .main{font-size:140%}nav .material-icons{height:60px;line-height:60px}}
diff --git a/static/v0/js/geolocation.js b/static/v0/js/geolocation.js
index 1ea4ee5..4f520b9 100644
--- a/static/v0/js/geolocation.js
+++ b/static/v0/js/geolocation.js
@@ -11,6 +11,12 @@ document.addEventListener("DOMContentLoaded", function() {
 	const processResult = function(results) {
 		const list = document.createElement("ul");
 		list.className = "stops";
+
+		if (results.error) {
+			showError("Backend-Fehler:", results.msg);
+			return;
+		}
+
 		for (var result in results) {
 			result = results[result];
 			const listentry = document.createElement("li");
diff --git a/templates/departure_list.html b/templates/departure_list.html
index 3762a03..42ce550 100644
--- a/templates/departure_list.html
+++ b/templates/departure_list.html
@@ -10,6 +10,15 @@
 
 <div class="container">
 	<div class="content">
+		{% if warning %}
+			<div class="content">
+				<div class="warning">
+					<strong>{{ warning["lead"] }}</strong>
+					{{ warning["body"] }}
+					<div class="errcode">{{ warning["code"] }}</div>
+				</div>
+			</div>
+		{% endif %}
 		{% if not departures %}
 			<div class="globalnote">Keine Abfahrten innerhalb der nächsten zwei Stunden</div>
 		{% endif %}
diff --git a/templates/landing_page.html b/templates/landing_page.html
index c5a04fd..b6a28cd 100644
--- a/templates/landing_page.html
+++ b/templates/landing_page.html
@@ -8,6 +8,15 @@
 <body>
 {% include 'navbar.html' %}
 <div class="container">
+	{% if error %}
+		<div class="content">
+			<div class="error">
+				<strong>{{ error["lead"] }}</strong>
+				{{ error["body"] }}
+				<div class="errcode">{{ error["code"] }}</div>
+			</div>
+		</div>
+	{% endif %}
 	<div class="content">
 		<div class="geolocation">
 			<button id="geolocationsearch">Haltestellen in der Umgebung suchen</button>