From 92d6a18c8a3d0c22b4994cb02d1fa400ae43fc46 Mon Sep 17 00:00:00 2001
From: xgaia <xgaia@gmx.com>
Date: Mon, 6 Jan 2020 12:10:08 +0100
Subject: [PATCH] display error when ts is not accessible

---
 askomics/libaskomics/SparqlQueryLauncher.py | 56 ++++++++++++---------
 askomics/react/src/routes/ask/ask.jsx       |  1 +
 2 files changed, 33 insertions(+), 24 deletions(-)

diff --git a/askomics/libaskomics/SparqlQueryLauncher.py b/askomics/libaskomics/SparqlQueryLauncher.py
index 49887ec3..45a9e114 100644
--- a/askomics/libaskomics/SparqlQueryLauncher.py
+++ b/askomics/libaskomics/SparqlQueryLauncher.py
@@ -1,4 +1,7 @@
 import time
+import urllib
+import traceback
+import sys
 
 from SPARQLWrapper import JSON, SPARQLWrapper
 
@@ -275,30 +278,35 @@ def execute_query(self, query):
         TYPE
             result
         """
-        start_time = time.time()
-        self.endpoint.setQuery(query)
-
-        # Debug
-        if self.settings.getboolean('askomics', 'debug'):
-            self.log.debug("Launch query on {} ({})".format(self.triplestore, self.url_endpoint))
-            self.log.debug(query)
-
-        # Update
-        if self.endpoint.isSparqlUpdateRequest():
-            self.endpoint.setMethod('POST')
-            # Virtuoso hack
-            if self.triplestore == 'virtuoso':
-                self.endpoint.queryType = "SELECT"
-
-            results = self.endpoint.query()
-            self.query_time = time.time() - start_time
-        # Select
-        else:
-            self.endpoint.setReturnFormat(JSON)
-            results = self.endpoint.query().convert()
-            self.query_time = time.time() - start_time
-        # self.log.debug(results)
-        return results
+        try:
+            start_time = time.time()
+            self.endpoint.setQuery(query)
+
+            # Debug
+            if self.settings.getboolean('askomics', 'debug'):
+                self.log.debug("Launch query on {} ({})".format(self.triplestore, self.url_endpoint))
+                self.log.debug(query)
+
+            # Update
+            if self.endpoint.isSparqlUpdateRequest():
+                self.endpoint.setMethod('POST')
+                # Virtuoso hack
+                if self.triplestore == 'virtuoso':
+                    self.endpoint.queryType = "SELECT"
+
+                results = self.endpoint.query()
+                self.query_time = time.time() - start_time
+            # Select
+            else:
+                self.endpoint.setReturnFormat(JSON)
+                results = self.endpoint.query().convert()
+                self.query_time = time.time() - start_time
+            # self.log.debug(results)
+            return results
+
+        except urllib.error.URLError:
+            traceback.print_exc(file=sys.stdout)
+            raise urllib.error.URLError("Triplestore is not accessible")
 
     def parse_results_old(self, json_results):
         """Parse result of sparql query
diff --git a/askomics/react/src/routes/ask/ask.jsx b/askomics/react/src/routes/ask/ask.jsx
index 2a7cf4a9..cb83f1bd 100644
--- a/askomics/react/src/routes/ask/ask.jsx
+++ b/askomics/react/src/routes/ask/ask.jsx
@@ -18,6 +18,7 @@ export default class Ask extends Component {
       error: false,
       errorMessage: null,
       startpoints: [],
+      endpoints: [],
       selected: null,
       startSession: false,
       publicQueries: [],