/**
* Copyright (c) Microsoft Corporation.
*
* 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.
*/
import type { Server } from '@modelcontextprotocol/sdk/server/index.js';
import type { Transport, TransportSendOptions } from '@modelcontextprotocol/sdk/shared/transport.js';
import type { JSONRPCMessage, MessageExtraInfo } from '@modelcontextprotocol/sdk/types.js';
export class InProcessTransport implements Transport {
private _server: Server;
private _serverTransport: InProcessServerTransport;
private _connected: boolean = false;
constructor(server: Server) {
this._server = server;
this._serverTransport = new InProcessServerTransport(this);
}
async start(): Promise<void> {
if (this._connected)
throw new Error('InprocessTransport already started!');
await this._server.connect(this._serverTransport);
this._connected = true;
}
async send(message: JSONRPCMessage, options?: TransportSendOptions): Promise<void> {
if (!this._connected)
throw new Error('Transport not connected');
this._serverTransport._receiveFromClient(message);
}
async close(): Promise<void> {
if (this._connected) {
this._connected = false;
this.onclose?.();
this._serverTransport.onclose?.();
}
}
onclose?: (() => void) | undefined;
onerror?: ((error: Error) => void) | undefined;
onmessage?: ((message: JSONRPCMessage, extra?: MessageExtraInfo) => void) | undefined;
sessionId?: string | undefined;
setProtocolVersion?: ((version: string) => void) | undefined;
_receiveFromServer(message: JSONRPCMessage, extra?: MessageExtraInfo): void {
this.onmessage?.(message, extra);
}
}
class InProcessServerTransport implements Transport {
private _clientTransport: InProcessTransport;
constructor(clientTransport: InProcessTransport) {
this._clientTransport = clientTransport;
}
async start(): Promise<void> {
}
async send(message: JSONRPCMessage, options?: TransportSendOptions): Promise<void> {
this._clientTransport._receiveFromServer(message);
}
async close(): Promise<void> {
this.onclose?.();
}
onclose?: (() => void) | undefined;
onerror?: ((error: Error) => void) | undefined;
onmessage?: ((message: JSONRPCMessage, extra?: MessageExtraInfo) => void) | undefined;
sessionId?: string | undefined;
setProtocolVersion?: ((version: string) => void) | undefined;
_receiveFromClient(message: JSONRPCMessage): void {
this.onmessage?.(message);
}
}