Fix loading cover images on mobile when not allowed

core/src/main/java/de/danoeh/antennapod/core/glide/ApGlideModule.java

@@ -11,7 +11,6 @@ import com.bumptech.glide.Registry;
 import com.bumptech.glide.annotation.GlideModule;
 import com.bumptech.glide.load.DecodeFormat;
 import com.bumptech.glide.load.engine.cache.InternalCacheDiskCacheFactory;
-import com.bumptech.glide.load.model.StringLoader;
 import com.bumptech.glide.module.AppGlideModule;
 
 import de.danoeh.antennapod.model.feed.EmbeddedChapterImage;
@@ -43,7 +42,7 @@ public class ApGlideModule extends AppGlideModule {
     public void registerComponents(@NonNull Context context, @NonNull Glide glide, @NonNull Registry registry) {
         registry.replace(String.class, InputStream.class, new MetadataRetrieverLoader.Factory(context));
         registry.append(String.class, InputStream.class, new ApOkHttpUrlLoader.Factory());
-        registry.append(String.class, InputStream.class, new StringLoader.StreamFactory());
+        registry.append(String.class, InputStream.class, new NoHttpStringLoader.StreamFactory());
 
         registry.append(EmbeddedChapterImage.class, ByteBuffer.class, new ChapterImageModelLoader.Factory());
     }

core/src/main/java/de/danoeh/antennapod/core/glide/NoHttpStringLoader.java

@@ -0,0 +1,39 @@
+package de.danoeh.antennapod.core.glide;
+
+import android.net.Uri;
+import androidx.annotation.NonNull;
+import com.bumptech.glide.load.model.ModelLoader;
+import com.bumptech.glide.load.model.ModelLoaderFactory;
+import com.bumptech.glide.load.model.MultiModelLoaderFactory;
+import com.bumptech.glide.load.model.StringLoader;
+
+import java.io.InputStream;
+
+/**
+ * StringLoader that does not handle http/https urls. Used to avoid fallback to StringLoader when
+ * AntennaPod blocks mobile image loading.
+ */
+public final class NoHttpStringLoader extends StringLoader<InputStream> {
+
+    public static class StreamFactory implements ModelLoaderFactory<String, InputStream> {
+        @NonNull
+        @Override
+        public ModelLoader<String, InputStream> build(@NonNull MultiModelLoaderFactory multiFactory) {
+            return new NoHttpStringLoader(multiFactory.build(Uri.class, InputStream.class));
+        }
+
+        @Override
+        public void teardown() {
+            // Do nothing.
+        }
+    }
+
+    public NoHttpStringLoader(ModelLoader<Uri, InputStream> uriLoader) {
+        super(uriLoader);
+    }
+
+    @Override
+    public boolean handles(@NonNull String model) {
+        return !model.startsWith("http") && super.handles(model);
+    }
+}