Image upload specifications api

application/src/main/java/org/thingsboard/server/controller/ImageController.java

@@ -16,6 +16,8 @@
 package org.thingsboard.server.controller;
 
 import io.swagger.annotations.ApiParam;
+import lombok.Builder;
+import lombok.Data;
 import lombok.RequiredArgsConstructor;
 import lombok.extern.slf4j.Slf4j;
 import org.apache.commons.lang3.StringUtils;
@@ -49,6 +51,7 @@ import org.thingsboard.server.common.data.id.TenantId;
 import org.thingsboard.server.common.data.page.PageData;
 import org.thingsboard.server.common.data.page.PageLink;
 import org.thingsboard.server.common.data.security.Authority;
+import org.thingsboard.server.common.data.tenant.profile.DefaultTenantProfileConfiguration;
 import org.thingsboard.server.common.data.util.ThrowingSupplier;
 import org.thingsboard.server.dao.resource.ImageCacheKey;
 import org.thingsboard.server.dao.resource.ImageService;
@@ -281,6 +284,19 @@ public class ImageController extends BaseController {
         return (result.isSuccess() ? ResponseEntity.ok() : ResponseEntity.badRequest()).body(result);
     }
 
+    @PreAuthorize("hasAnyAuthority('SYS_ADMIN', 'TENANT_ADMIN', 'CUSTOMER_USER')")
+    @GetMapping("/api/image/specs")
+    public ImageSpecs getImageUploadSpecs() throws ThingsboardException {
+        SecurityUser user = getCurrentUser();
+        if (user.isSystemAdmin()) {
+            return ImageSpecs.DEFAULT;
+        }
+        DefaultTenantProfileConfiguration tenantProfileConfig = tenantProfileCache.get(user.getTenantId()).getDefaultProfileConfiguration();
+        return ImageSpecs.builder()
+                .maximumSize(tenantProfileConfig.getMaxResourceSize())
+                .build();
+    }
+
     private ResponseEntity<ByteArrayResource> downloadIfChanged(String type, String key, String etag, boolean preview) throws Exception {
         ImageCacheKey cacheKey = ImageCacheKey.forImage(getTenantId(type), key, preview);
         return downloadIfChanged(cacheKey, etag, () -> checkImageInfo(type, key, Operation.READ));
@@ -343,4 +359,14 @@ public class ImageController extends BaseController {
         return tenantId;
     }
 
+    @Data
+    @Builder
+    public static class ImageSpecs {
+        private final long maximumSize;
+
+        public static final ImageSpecs DEFAULT = ImageSpecs.builder()
+                .maximumSize(0)
+                .build();
+    }
+
 }

application/src/test/java/org/thingsboard/server/controller/ImageControllerTest.java

@@ -33,6 +33,7 @@ import org.thingsboard.server.common.data.ResourceType;
 import org.thingsboard.server.common.data.TbResourceInfo;
 import org.thingsboard.server.common.data.page.PageData;
 import org.thingsboard.server.common.data.page.PageLink;
+import org.thingsboard.server.controller.ImageController.ImageSpecs;
 import org.thingsboard.server.dao.service.DaoSqlTest;
 import org.thingsboard.server.dao.sql.resource.TbResourceRepository;
 
@@ -240,6 +241,28 @@ public class ImageControllerTest extends AbstractControllerTest {
         doGet("/api/images/public/" + publicKey).andExpect(status().isNotFound());
     }
 
+    @Test
+    public void testGetImageUploadSpecs() throws Exception {
+        ImageSpecs specs = doGet("/api/image/specs", ImageSpecs.class);
+        assertThat(specs.getMaximumSize()).isZero();
+
+        loginSysAdmin();
+        updateDefaultTenantProfileConfig(tenantProfileConfig -> {
+            tenantProfileConfig.setMaxResourceSize(100);
+        });
+        loginTenantAdmin();
+        specs = doGet("/api/image/specs", ImageSpecs.class);
+        assertThat(specs.getMaximumSize()).isEqualTo(100);
+
+        loginSysAdmin();
+        updateDefaultTenantProfileConfig(tenantProfileConfig -> {
+            tenantProfileConfig.setMaxResourceSize(0);
+        });
+        loginTenantAdmin();
+        specs = doGet("/api/image/specs", ImageSpecs.class);
+        assertThat(specs.getMaximumSize()).isEqualTo(0);
+    }
+
     private TbResourceInfo updateImagePublicStatus(String filename, boolean isPublic) throws Exception {
         return doPut("/api/images/tenant/" + filename + "/public/" + isPublic, "", TbResourceInfo.class);
     }