Add maxHeaderSize config for server side

ballerina-tests/tests/08_unary_client_with_headers.bal

@@ -43,3 +43,14 @@ function testHeadersInBlockingClient() returns grpc:Error? {
     map<string|string[]> resHeaders = response.headers;
     test:assertEquals(check grpc:getHeaders(resHeaders, "x-id"), ["0987654321", "1234567890", "2233445677"]);
 }
+
+@test:Config {enable: true}
+function testLargeHeaderSize() returns grpc:Error? {
+    wrappers:ContextString requestMessage = {content: "WSO2", headers: {"large-header": "09876543210987654321098765432109876543210987654321098765432109876543210987654321098765432109876543210987654321098765432109876543210987654321098765432109876543210987654321"}};
+    wrappers:ContextString|grpc:Error response = helloWorld8BlockingEp->helloContext(requestMessage);
+    if response is grpc:Error {
+        test:assertEquals(response.message(), "Header size exceeded max allowed size (600)");
+    } else {
+        test:assertFail("Expected an error");
+    }
+}

ballerina-tests/tests/08_unary_service_with_headers.bal

@@ -19,7 +19,8 @@ import ballerina/protobuf.types.wrappers;
 
 // Server endpoint configuration
 listener grpc:Listener ep8 = new (9098, {
-    host: "localhost"
+    host: "localhost",
+    maxHeaderSize: 600
 });
 
 @grpc:Descriptor {

ballerina/Ballerina.toml

@@ -1,7 +1,7 @@
 [package]
 org = "ballerina"
 name = "grpc"
-version = "1.10.5"
+version = "1.10.6"
 distribution = "2201.8.0"
 authors = ["Ballerina"]
 keywords = ["network", "grpc", "protobuf", "server-streaming", "client-streaming", "bidirectional-streaming"]
@@ -16,11 +16,11 @@ graalvmCompatible = true
 [[platform.java17.dependency]]
 groupId = "io.ballerina.stdlib"
 artifactId = "grpc-native"
-version = "1.10.5"
-path = "../native/build/libs/grpc-native-1.10.5.jar"
+version = "1.10.6"
+path = "../native/build/libs/grpc-native-1.10.6-SNAPSHOT.jar"
 
 [[platform.java17.dependency]]
-path = "../test-utils/build/libs/grpc-test-utils-1.10.5.jar"
+path = "../test-utils/build/libs/grpc-test-utils-1.10.6-SNAPSHOT.jar"
 scope = "testOnly"
 
 [[platform.java17.dependency]]
@@ -34,8 +34,8 @@ scope = "testOnly"
 [[platform.java17.dependency]]
 groupId = "io.ballerina.stdlib"
 artifactId = "http-native"
-version = "2.10.3"
-path = "./lib/http-native-2.10.3.jar"
+version = "2.10.6"
+path = "./lib/http-native-2.10.6.jar"
 
 [[platform.java17.dependency]]
 groupId = "io.netty"

ballerina/CompilerPlugin.toml

@@ -3,4 +3,4 @@ id = "grpc-compiler-plugin"
 class = "io.ballerina.stdlib.grpc.plugin.GrpcCompilerPlugin"
 
 [[dependency]]
-path = "../compiler-plugin/build/libs/grpc-compiler-plugin-1.10.5.jar"
+path = "../compiler-plugin/build/libs/grpc-compiler-plugin-1.10.6-SNAPSHOT.jar"

ballerina/Dependencies.toml

@@ -68,7 +68,7 @@ dependencies = [
 [[package]]
 org = "ballerina"
 name = "grpc"
-version = "1.10.5"
+version = "1.10.6"
 dependencies = [
 	{org = "ballerina", name = "auth"},
 	{org = "ballerina", name = "crypto"},
@@ -94,7 +94,7 @@ modules = [
 [[package]]
 org = "ballerina"
 name = "http"
-version = "2.10.3"
+version = "2.10.6"
 scope = "testOnly"
 dependencies = [
 	{org = "ballerina", name = "auth"},

ballerina/service_endpoint.bal

@@ -301,12 +301,14 @@ const decimal DEFAULT_LISTENER_TIMEOUT = 120; //2 mins
 # + timeout - Period of time in seconds that a connection waits for a read/write operation. Use value 0 to
 # disable the timeout
 # + maxInboundMessageSize - The maximum message size to be permitted for inbound messages. Default value is 4 MB
+# + maxHeaderSize - The maximum size of the headers to be permitted for inbound messages. Default value is 8 KB
 # + reflectionEnabled - Support reflection
 public type ListenerConfiguration record {|
     string host = "0.0.0.0";
     ListenerSecureSocket? secureSocket = ();
     decimal timeout = DEFAULT_LISTENER_TIMEOUT;
     int maxInboundMessageSize = 4194304;
+    int maxHeaderSize = 8192;
     boolean reflectionEnabled = false;
 |};
 

changelog.md

@@ -4,6 +4,10 @@ This file contains all the notable changes done to the Ballerina gRPC package th
 The format is based on [Keep a Changelog](https://keepachangelog.com/en/1.0.0/),
 and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0.html).
 
+## Unreleased
+### Added
+- [Added `maxHeaderSize` in `grpc:ListenerConfiguration`](https://github.com/ballerina-platform/ballerina-library/issues/5969)
+
 ## [1.10.5] - 2024-01-22
 ### Fixed
 - [Fixed the way of handling `grpc:RetryConfiguration`](https://github.com/ballerina-platform/ballerina-library/issues/5970)

gradle.properties

@@ -47,7 +47,7 @@ stdlibAuthVersion=2.10.0
 stdlibJwtVersion=2.10.0
 stdlibOAuth2Version=2.10.0
 
-stdlibHttpVersion=2.10.6-20240130-162500-8913531
+stdlibHttpVersion=2.10.6
 
 # Ballerinax Observer
 observeVersion=1.2.0

native/src/main/java/io/ballerina/stdlib/grpc/ClientConnectorListener.java

@@ -30,6 +30,7 @@
 import static io.ballerina.stdlib.grpc.GrpcConstants.GRPC_MESSAGE_KEY;
 import static io.ballerina.stdlib.grpc.GrpcConstants.GRPC_STATUS_KEY;
 import static io.ballerina.stdlib.grpc.GrpcConstants.MESSAGE_ENCODING;
+import static io.ballerina.stdlib.grpc.MessageUtils.httpStatusToGrpcCode;
 import static io.ballerina.stdlib.grpc.MessageUtils.readAsString;
 
 /**
@@ -161,9 +162,13 @@
                 // Ignore the headers. See RFC 7540 §8.1
                 // 1xx (Informational): The request was received, continuing process
                 return false;
+            } else if (httpStatus == 431) {
+                transportError = httpStatusToGrpcCode(httpStatus).toStatus()
+                        .withDescription("Exceeded the maximum header size allowed");
+            } else {
+                transportError = validateInitialMetadata(inboundMessage);
             }
             headersReceived = true;
-            transportError = validateInitialMetadata(inboundMessage);
             return transportError == null;
         } finally {
             if (transportError != null) {

native/src/main/java/io/ballerina/stdlib/grpc/GrpcUtil.java

@@ -60,6 +60,7 @@
 import static io.ballerina.stdlib.http.api.HttpConstants.CONNECTION_MANAGER;
 import static io.ballerina.stdlib.http.api.HttpConstants.CONNECTION_POOLING_MAX_ACTIVE_STREAMS_PER_CONNECTION;
 import static io.ballerina.stdlib.http.api.HttpConstants.LISTENER_CONFIGURATION;
+import static io.ballerina.stdlib.http.api.HttpConstants.MAX_HEADER_SIZE;
 import static io.ballerina.stdlib.http.api.HttpConstants.PKCS_STORE_TYPE;
 import static io.ballerina.stdlib.http.api.HttpConstants.PROTOCOL_HTTPS;
 import static io.ballerina.stdlib.http.api.HttpConstants.SERVER_NAME;
@@ -233,6 +234,9 @@ public static ListenerConfiguration getListenerConfig(long port, BMap endpointCo
             return setSslConfig(sslConfig, listenerConfiguration);
         }
 
+        listenerConfiguration.getMsgSizeValidationConfig().setMaxHeaderSize(endpointConfig.getIntValue(MAX_HEADER_SIZE)
+                .intValue());
+
         listenerConfiguration.setPipeliningEnabled(true); //Pipelining is enabled all the time
         listenerConfiguration.setSocketReuse(true);
         listenerConfiguration.setTcpNoDelay(true);

native/src/main/java/io/ballerina/stdlib/grpc/MessageUtils.java

@@ -282,7 +282,7 @@ static Status httpStatusToGrpcStatus(int httpStatusCode) {
                 .withDescription("HTTP status code " + httpStatusCode);
     }
 
-    private static Status.Code httpStatusToGrpcCode(int httpStatusCode) {
+    static Status.Code httpStatusToGrpcCode(int httpStatusCode) {
         if (httpStatusCode >= 100 && httpStatusCode < 200) {
             // 1xx. These headers should have been ignored.
             return Status.Code.INTERNAL;