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fix: bound inline SSE event size in Streamable HTTP client (#841)

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Bound the size of a single inline SSE event parsed from a POST response
in `StreamableHttpClientTransport`, so a non-conforming or unbounded
server response cannot grow the client's buffer without limit.

## How Has This Been Tested?
New unit tests

## Breaking Changes
none

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

## Checklist
- [x] I have read the [MCP
Documentation](https://modelcontextprotocol.io)
- [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 2026-06-18 08:54:54 +02:00 • committed by GitHub
commit d21728ecca
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1 changed files with 144 additions and 8 deletions
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4
kotlin-sdk-client/api/kotlin-sdk-client.api
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@ -101,8 +101,8 @@ public final class io/modelcontextprotocol/kotlin/sdk/client/StdioClientTranspor
}
public final class io/modelcontextprotocol/kotlin/sdk/client/StreamableHttpClientTransport : io/modelcontextprotocol/kotlin/sdk/shared/AbstractClientTransport {
public fun <init> (Lio/ktor/client/HttpClient;Ljava/lang/String;Lio/modelcontextprotocol/kotlin/sdk/client/ReconnectionOptions;Lkotlin/jvm/functions/Function1;)V
public synthetic fun <init> (Lio/ktor/client/HttpClient;Ljava/lang/String;Lio/modelcontextprotocol/kotlin/sdk/client/ReconnectionOptions;Lkotlin/jvm/functions/Function1;ILkotlin/jvm/internal/DefaultConstructorMarker;)V
public fun <init> (Lio/ktor/client/HttpClient;Ljava/lang/String;Lio/modelcontextprotocol/kotlin/sdk/client/ReconnectionOptions;ILkotlin/jvm/functions/Function1;)V
public synthetic fun <init> (Lio/ktor/client/HttpClient;Ljava/lang/String;Lio/modelcontextprotocol/kotlin/sdk/client/ReconnectionOptions;ILkotlin/jvm/functions/Function1;ILkotlin/jvm/internal/DefaultConstructorMarker;)V
public synthetic fun <init> (Lio/ktor/client/HttpClient;Ljava/lang/String;Lkotlin/time/Duration;Lkotlin/jvm/functions/Function1;ILkotlin/jvm/internal/DefaultConstructorMarker;)V
public synthetic fun <init> (Lio/ktor/client/HttpClient;Ljava/lang/String;Lkotlin/time/Duration;Lkotlin/jvm/functions/Function1;Lkotlin/jvm/internal/DefaultConstructorMarker;)V
public final fun getProtocolVersion ()Ljava/lang/String;