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Client-side 2026-07-28 support: .discover()/.adopt() + Client(mode=); request-metadata green (#2950)

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Max 2026-06-25 16:09:23 +02:00 • committed by GitHub
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1 changed files with 2533 additions and 993 deletions
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6
src/mcp/server/streamable_http_manager.py
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@ -19,16 +19,16 @@ from mcp.server.auth.middleware.bearer_auth import AuthenticatedUser, Authorizat
from mcp.server.connection import Connection
from mcp.server.runner import serve_connection, serve_loop
from mcp.server.streamable_http import (
MCP_PROTOCOL_VERSION_HEADER,
MCP_SESSION_ID_HEADER,
EventStore,
StreamableHTTPServerTransport,
)
from mcp.server.transport_security import TransportSecuritySettings
from mcp.shared._compat import resync_tracer
from mcp.shared.inbound import MCP_PROTOCOL_VERSION_HEADER
from mcp.shared.jsonrpc_dispatcher import JSONRPCDispatcher
from mcp.shared.transport_context import TransportContext
from mcp.shared.version import SUPPORTED_PROTOCOL_VERSIONS
from mcp.shared.version import HANDSHAKE_PROTOCOL_VERSIONS
from mcp.types import DEFAULT_NEGOTIATED_VERSION, INVALID_REQUEST, ErrorData, JSONRPCError
if TYPE_CHECKING:
@ -169,7 +169,7 @@ class StreamableHTTPSessionManager:
# and return a structured rejection. 2025 paths below remain unchanged.
header = MCP_PROTOCOL_VERSION_HEADER.encode("ascii")
pv = next((v.decode("latin-1") for k, v in scope["headers"] if k == header), None)
if pv is not None and pv not in SUPPORTED_PROTOCOL_VERSIONS:
if pv is not None and pv not in HANDSHAKE_PROTOCOL_VERSIONS:
await handle_modern_request(self.app, self.security_settings, self._lifespan_state, scope, receive, send)
return