From ce6c915647e60974c41a67ccc56d5b06c081848b Mon Sep 17 00:00:00 2001
From: Frank Rotermund <frank.rotermund@bwi.de>
Date: Tue, 22 Aug 2023 08:10:13 +0200
Subject: [PATCH] MESSENGER-4549 strict check for mapstyle url

---
 .../HomeserverConfigurationBuilder.swift          | 15 ++++++++++-----
 1 file changed, 10 insertions(+), 5 deletions(-)

diff --git a/Riot/Model/HomeserverConfiguration/HomeserverConfigurationBuilder.swift b/Riot/Model/HomeserverConfiguration/HomeserverConfigurationBuilder.swift
index 8ef9107f3..f1f409f65 100644
--- a/Riot/Model/HomeserverConfiguration/HomeserverConfigurationBuilder.swift
+++ b/Riot/Model/HomeserverConfiguration/HomeserverConfigurationBuilder.swift
@@ -73,15 +73,16 @@ final class HomeserverConfigurationBuilder: NSObject {
         
         // Tile server configuration
         
-        let tileServerMapStyleURL: URL
+        
+        
+        var tileServerMapStyleURL: URL = URL(string: BWIBuildSettings.shared.serverConfigDefaultMapstyleURLString)!
         if let mapStyleURLString = wellKnown?.tileServer?.mapStyleURLString,
            let mapStyleURL = URL(string: mapStyleURLString) {
-            tileServerMapStyleURL = mapStyleURL
-        } else {
-            tileServerMapStyleURL = URL(string: BWIBuildSettings.shared.serverConfigDefaultMapstyleURLString)!
+            if verifyUrl(url: mapStyleURL) {
+                tileServerMapStyleURL = mapStyleURL
+            }
         }
                 
-        
         let tileServerConfiguration = HomeserverTileServerConfiguration(mapStyleURL: tileServerMapStyleURL)
         
         // Create HomeserverConfiguration
@@ -145,4 +146,8 @@ final class HomeserverConfigurationBuilder: NSObject {
         
         return jitsiServerURL
     }
+    
+    private func verifyUrl (url: URL) -> Bool {
+        return UIApplication.shared.canOpenURL(url)
+    }
 }