From 672d98d84cbffebfe6fc32e456ab4c3893019752 Mon Sep 17 00:00:00 2001
From: Whiteyingshan <a1746345173@163.com>
Date: Fri, 1 Nov 2024 15:56:11 +0800
Subject: [PATCH] Fix #703 - Fix error when providers are null

---
 .../ua/dicoogle/server/web/servlets/ImageServlet.java | 11 ++++++++---
 1 file changed, 8 insertions(+), 3 deletions(-)

diff --git a/dicoogle/src/main/java/pt/ua/dicoogle/server/web/servlets/ImageServlet.java b/dicoogle/src/main/java/pt/ua/dicoogle/server/web/servlets/ImageServlet.java
index d65f224a3..8b13c0cf5 100644
--- a/dicoogle/src/main/java/pt/ua/dicoogle/server/web/servlets/ImageServlet.java
+++ b/dicoogle/src/main/java/pt/ua/dicoogle/server/web/servlets/ImageServlet.java
@@ -232,11 +232,16 @@ public void onReceive(Task<Iterable<SearchResult>> e) {}
             if (providers == null) {
                 // use only DIM sources
                 providers = ServerSettingsManager.getSettings().getArchiveSettings().getDIMProviders();
-                // exclude unknown query providers
-                providers.removeIf(pName -> pc.getQueryProviderByName(pName, true) == null);
-                if (providers.isEmpty()) {
+                if (providers == null) {
                     // fallback to all query providers
                     providers = pc.getQueryProvidersName(true);
+                } else {
+                    // exclude unknown query providers
+                    providers.removeIf(pName -> pc.getQueryProviderByName(pName, true) == null);
+                    if (providers.isEmpty()) {
+                        // fallback to all query providers
+                        providers = pc.getQueryProvidersName(true);
+                    }
                 }
             }
             Iterator<SearchResult> it = pc