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fix: bound request body size in SSE and Streamable HTTP transports (#839)

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Caps the size of incoming HTTP POST bodies in both server transports so
an oversized request can no longer exhaust server memory

## How Has This Been Tested?
new tests

## Breaking Changes
binary incompatible for SseServerTransport constuctors 

## Types of changes
- [x] Bug fix (non-breaking change which fixes a
- [x] New feature (non-breaking change which adds functionality)
- [x] Breaking change (fix or feature that would to change)
- [ ] Documentation update

## Checklist
- [x] I have read the [MCP Documentation](https:
- [x] My code follows the repository's style guidelines
- [x] New and existing tests pass locally
- [x] I have added appropriate error handling
- [x] I have added or updated documentation as needed
This commit is contained in:
Pavel Gorgulov 2026-06-30 20:43:45 +02:00 • committed by GitHub
commit 35da063c23
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GPG key ID: B5690EEEBB952194
1 changed files with 308 additions and 36 deletions
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15
kotlin-sdk-server/api/kotlin-sdk-server.api
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@ -51,12 +51,12 @@ public final class io/modelcontextprotocol/kotlin/sdk/server/HostValidationKt {
}
public final class io/modelcontextprotocol/kotlin/sdk/server/KtorServerKt {
public static final fun mcp (Lio/ktor/server/application/Application;ZLjava/util/List;Ljava/util/List;Lkotlin/jvm/functions/Function1;)V
public static final fun mcp (Lio/ktor/server/routing/Route;Ljava/lang/String;ZLjava/util/List;Ljava/util/List;Lkotlin/jvm/functions/Function1;)V
public static final fun mcp (Lio/ktor/server/routing/Route;ZLjava/util/List;Ljava/util/List;Lkotlin/jvm/functions/Function1;)V
public static synthetic fun mcp$default (Lio/ktor/server/application/Application;ZLjava/util/List;Ljava/util/List;Lkotlin/jvm/functions/Function1;ILjava/lang/Object;)V
public static synthetic fun mcp$default (Lio/ktor/server/routing/Route;Ljava/lang/String;ZLjava/util/List;Ljava/util/List;Lkotlin/jvm/functions/Function1;ILjava/lang/Object;)V
public static synthetic fun mcp$default (Lio/ktor/server/routing/Route;ZLjava/util/List;Ljava/util/List;Lkotlin/jvm/functions/Function1;ILjava/lang/Object;)V
public static final fun mcp (Lio/ktor/server/application/Application;ZLjava/util/List;Ljava/util/List;JLkotlin/jvm/functions/Function1;)V
public static final fun mcp (Lio/ktor/server/routing/Route;Ljava/lang/String;ZLjava/util/List;Ljava/util/List;JLkotlin/jvm/functions/Function1;)V
public static final fun mcp (Lio/ktor/server/routing/Route;ZLjava/util/List;Ljava/util/List;JLkotlin/jvm/functions/Function1;)V
public static synthetic fun mcp$default (Lio/ktor/server/application/Application;ZLjava/util/List;Ljava/util/List;JLkotlin/jvm/functions/Function1;ILjava/lang/Object;)V
public static synthetic fun mcp$default (Lio/ktor/server/routing/Route;Ljava/lang/String;ZLjava/util/List;Ljava/util/List;JLkotlin/jvm/functions/Function1;ILjava/lang/Object;)V
public static synthetic fun mcp$default (Lio/ktor/server/routing/Route;ZLjava/util/List;Ljava/util/List;JLkotlin/jvm/functions/Function1;ILjava/lang/Object;)V
public static final fun mcpStatelessStreamableHttp (Lio/ktor/server/application/Application;Ljava/lang/String;ZLjava/util/List;Ljava/util/List;Lio/modelcontextprotocol/kotlin/sdk/server/EventStore;Lkotlin/jvm/functions/Function1;)V
public static synthetic fun mcpStatelessStreamableHttp$default (Lio/ktor/server/application/Application;Ljava/lang/String;ZLjava/util/List;Ljava/util/List;Lio/modelcontextprotocol/kotlin/sdk/server/EventStore;Lkotlin/jvm/functions/Function1;ILjava/lang/Object;)V
public static final fun mcpStreamableHttp (Lio/ktor/server/application/Application;Ljava/lang/String;ZLjava/util/List;Ljava/util/List;Lio/modelcontextprotocol/kotlin/sdk/server/EventStore;Lkotlin/jvm/functions/Function1;)V
@ -208,7 +208,8 @@ public class io/modelcontextprotocol/kotlin/sdk/server/ServerSession : io/modelc
}
public final class io/modelcontextprotocol/kotlin/sdk/server/SseServerTransport : io/modelcontextprotocol/kotlin/sdk/shared/AbstractTransport {
public fun <init> (Ljava/lang/String;Lio/ktor/server/sse/ServerSSESession;)V
public fun <init> (Ljava/lang/String;Lio/ktor/server/sse/ServerSSESession;J)V
public synthetic fun <init> (Ljava/lang/String;Lio/ktor/server/sse/ServerSSESession;JILkotlin/jvm/internal/DefaultConstructorMarker;)V
public fun close (Lkotlin/coroutines/Continuation;)Ljava/lang/Object;
public final fun getSessionId ()Ljava/lang/String;
public final fun handleMessage (Ljava/lang/String;Lkotlin/coroutines/Continuation;)Ljava/lang/Object;