chore: Support configuration for max grpc inbound message (#1411)

Signed-off-by: Javier Aliaga <javier@diagrid.io>

sdk/src/main/java/io/dapr/config/Properties.java

@@ -175,6 +175,24 @@ public class Properties {
           "DAPR_HTTP_CLIENT_MAX_IDLE_CONNECTIONS",
           DEFAULT_HTTP_CLIENT_MAX_IDLE_CONNECTIONS);
 
+
+
+  /**
+   * Dapr's default maximum inbound message size for GRPC in bytes.
+   */
+  public static final Property<Integer> GRPC_MAX_INBOUND_MESSAGE_SIZE_BYTES = new IntegerProperty(
+      "dapr.grpc.max.inbound.message.size.bytes",
+      "DAPR_GRPC_MAX_INBOUND_MESSAGE_SIZE_BYTES",
+      4194304);
+
+  /**
+   * Dapr's default maximum inbound metadata size for GRPC in bytes.
+   */
+  public static final Property<Integer> GRPC_MAX_INBOUND_METADATA_SIZE_BYTES = new IntegerProperty(
+        "dapr.grpc.max.inbound.metadata.size.bytes",
+        "DAPR_GRPC_MAX_INBOUND_METADATA_SIZE_BYTES",
+        8192);
+    
   /**
    * Mechanism to override properties set in a static context.
    */

sdk/src/main/java/io/dapr/utils/NetworkUtils.java

@@ -25,6 +25,8 @@ import java.net.Socket;
 import java.util.regex.Pattern;
 
 import static io.dapr.config.Properties.GRPC_ENDPOINT;
+import static io.dapr.config.Properties.GRPC_MAX_INBOUND_MESSAGE_SIZE_BYTES;
+import static io.dapr.config.Properties.GRPC_MAX_INBOUND_METADATA_SIZE_BYTES;
 import static io.dapr.config.Properties.GRPC_PORT;
 import static io.dapr.config.Properties.SIDECAR_IP;
 
@@ -121,7 +123,9 @@ public final class NetworkUtils {
     if (interceptors != null && interceptors.length > 0) {
       builder = builder.intercept(interceptors);
     }
-    return builder.build();
+    return builder.maxInboundMessageSize(settings.maxInboundMessageSize)
+            .maxInboundMetadataSize(settings.maxInboundMetadataSize)
+            .build();
   }
 
   // Not private to allow unit testing
@@ -129,14 +133,24 @@ public final class NetworkUtils {
     final String endpoint;
     final boolean secure;
 
-    private GrpcEndpointSettings(String endpoint, boolean secure) {
+    final int maxInboundMessageSize;
+    final int maxInboundMetadataSize;
+
+    private GrpcEndpointSettings(
+        String endpoint, boolean secure,
+        int maxInboundMessageSize, int maxInboundMetadataSize) {
       this.endpoint = endpoint;
       this.secure = secure;
+      this.maxInboundMessageSize = maxInboundMessageSize;
+      this.maxInboundMetadataSize = maxInboundMetadataSize;
     }
 
     static GrpcEndpointSettings parse(Properties properties) {
       String address = properties.getValue(SIDECAR_IP);
       int port = properties.getValue(GRPC_PORT);
+      int maxInboundMessageSizeBytes = properties.getValue(GRPC_MAX_INBOUND_MESSAGE_SIZE_BYTES);
+      int maxInboundMetadataSizeBytes = properties.getValue(GRPC_MAX_INBOUND_METADATA_SIZE_BYTES);
+
       boolean secure = false;
       String grpcEndpoint = properties.getValue(GRPC_ENDPOINT);
       if ((grpcEndpoint != null) && !grpcEndpoint.isEmpty()) {
@@ -172,21 +186,23 @@ public final class NetworkUtils {
 
         var authorityEndpoint = matcher.group("authorityEndpoint");
         if (authorityEndpoint != null) {
-          return new GrpcEndpointSettings(String.format("dns://%s/%s:%d", authorityEndpoint, address, port), secure);
+          return new GrpcEndpointSettings(String.format("dns://%s/%s:%d", authorityEndpoint, address, port),
+                  secure, maxInboundMessageSizeBytes, maxInboundMetadataSizeBytes);
         }
 
         var socket = matcher.group("socket");
         if (socket != null) {
-          return new GrpcEndpointSettings(socket, secure);
+          return new GrpcEndpointSettings(socket, secure, maxInboundMessageSizeBytes, maxInboundMetadataSizeBytes);
         }
 
         var vsocket = matcher.group("vsocket");
         if (vsocket != null) {
-          return new GrpcEndpointSettings(vsocket, secure);
+          return new GrpcEndpointSettings(vsocket, secure, maxInboundMessageSizeBytes, maxInboundMetadataSizeBytes);
         }
       }
 
-      return new GrpcEndpointSettings(String.format("dns:///%s:%d", address, port), secure);
+      return new GrpcEndpointSettings(String.format("dns:///%s:%d", address, port), secure, 
+          maxInboundMessageSizeBytes, maxInboundMetadataSizeBytes);
     }
 
   }

sdk/src/test/java/io/dapr/utils/NetworkUtilsTest.java

@@ -1,3 +1,16 @@
+/*
+ * Copyright 2025 The Dapr Authors
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+limitations under the License.
+*/
+
 package io.dapr.utils;
 
 import io.dapr.config.Properties;
@@ -146,4 +159,27 @@ public class NetworkUtilsTest {
       // Expected
     }
   }
+
+  @Test
+  public void testMaxDefaultInboundSize() throws Exception {
+    Properties properties = new Properties();
+
+    NetworkUtils.GrpcEndpointSettings settings = NetworkUtils.GrpcEndpointSettings.parse(properties);
+    Assertions.assertEquals(4194304, settings.maxInboundMessageSize);
+    Assertions.assertEquals(8192, settings.maxInboundMetadataSize);
+
+  }
+
+  @Test
+  public void testMaxInboundSize() throws Exception {
+    Properties properties = new Properties(Map.of(
+        Properties.GRPC_MAX_INBOUND_MESSAGE_SIZE_BYTES.getName(), "123456789",
+        Properties.GRPC_MAX_INBOUND_METADATA_SIZE_BYTES.getName(), "123456"
+    ));
+
+    NetworkUtils.GrpcEndpointSettings settings = NetworkUtils.GrpcEndpointSettings.parse(properties);
+    Assertions.assertEquals(123456789, settings.maxInboundMessageSize);
+    Assertions.assertEquals(123456, settings.maxInboundMetadataSize);
+
+  }
 }