Complete Redis transport refactoring with request-id based channels
- Implement new ServerRedisTransport for server->client messages using request-specific channels
- Add redisRelayToMcpServer function for dynamic request-id based subscriptions
- Update shttp handler to use new transport return types with cleanup functions
- Remove old relayTransports and helper functions in favor of new architecture
- Add comprehensive test suites for Redis transport and shttp handler components
- Fix linting issues and ensure all tests pass
The new system routes server responses to channels like:
- mcp:shttp:toclient:${sessionId}:${requestId} for request responses
- mcp:shttp:toclient:${sessionId}:__GET_stream for notifications
This enables efficient scaling across multiple shttp instances as each client
only subscribes to channels relevant to their specific requests.
🤖 Generated with [Claude Code](https://claude.ai/code)
Co-Authored-By: Claude <noreply@anthropic.com>
This commit is contained in:
Jerome
parent
d62847ef52
commit
0aa0d19ad8
5 changed files with 590 additions and 109 deletions
229
src/handlers/shttp.test.ts
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229
src/handlers/shttp.test.ts
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@ -0,0 +1,229 @@
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import { jest } from '@jest/globals';
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import { Request, Response } from 'express';
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import { JSONRPCMessage } from '@modelcontextprotocol/sdk/types.js';
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import { MockRedisClient, setRedisClient } from '../redis.js';
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describe('Streamable HTTP Handler', () => {
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let mockRedis: MockRedisClient;
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beforeEach(() => {
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mockRedis = new MockRedisClient();
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setRedisClient(mockRedis);
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jest.resetAllMocks();
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});
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afterEach(() => {
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mockRedis.clear();
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});
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describe('Helper function tests', () => {
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it('should verify Redis mock is working', async () => {
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await mockRedis.set('test-key', 'test-value');
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const value = await mockRedis.get('test-key');
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expect(value).toBe('test-value');
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});
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it('should handle Redis pub/sub', async () => {
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const messageHandler = jest.fn();
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const cleanup = await mockRedis.createSubscription(
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'test-channel',
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messageHandler,
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jest.fn()
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);
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await mockRedis.publish('test-channel', 'test-message');
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expect(messageHandler).toHaveBeenCalledWith('test-message');
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await cleanup();
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});
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});
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describe('Request validation', () => {
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it('should identify initialize requests correctly', async () => {
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const { isInitializeRequest } = await import('@modelcontextprotocol/sdk/types.js');
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const initRequest: JSONRPCMessage = {
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jsonrpc: '2.0',
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id: 1,
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method: 'initialize',
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params: {
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protocolVersion: '2024-11-05',
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capabilities: {},
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clientInfo: { name: 'test', version: '1.0' }
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}
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};
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const nonInitRequest: JSONRPCMessage = {
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jsonrpc: '2.0',
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id: 2,
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method: 'tools/list',
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params: {}
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};
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expect(isInitializeRequest(initRequest)).toBe(true);
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expect(isInitializeRequest(nonInitRequest)).toBe(false);
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});
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});
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describe('HTTP response mock behavior', () => {
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it('should create proper response mock with chainable methods', () => {
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const mockRes = {
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status: jest.fn().mockReturnThis(),
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json: jest.fn().mockReturnThis(),
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on: jest.fn().mockReturnThis(),
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headersSent: false,
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} as Partial<Response>;
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// Test chaining
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const result = mockRes.status!(400).json!({
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jsonrpc: '2.0',
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error: { code: -32000, message: 'Bad Request' },
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id: null
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});
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expect(mockRes.status).toHaveBeenCalledWith(400);
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expect(mockRes.json).toHaveBeenCalledWith({
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jsonrpc: '2.0',
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error: { code: -32000, message: 'Bad Request' },
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id: null
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});
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expect(result).toBe(mockRes);
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});
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});
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describe('Session ID generation', () => {
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it('should generate valid UUIDs', async () => {
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const { randomUUID } = await import('crypto');
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const sessionId = randomUUID();
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// UUID v4 format: xxxxxxxx-xxxx-4xxx-yxxx-xxxxxxxxxxxx
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expect(sessionId).toMatch(/^[0-9a-f]{8}-[0-9a-f]{4}-4[0-9a-f]{3}-[89ab][0-9a-f]{3}-[0-9a-f]{12}$/i);
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});
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});
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describe('Redis channel naming', () => {
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it('should create correct channel names for server communication', () => {
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const sessionId = 'test-session-123';
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const requestId = 'req-456';
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const toServerChannel = `mcp:shttp:toserver:${sessionId}`;
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const toClientChannel = `mcp:shttp:toclient:${sessionId}:${requestId}`;
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const notificationChannel = `mcp:shttp:toclient:${sessionId}:__GET_stream`;
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expect(toServerChannel).toBe('mcp:shttp:toserver:test-session-123');
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expect(toClientChannel).toBe('mcp:shttp:toclient:test-session-123:req-456');
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expect(notificationChannel).toBe('mcp:shttp:toclient:test-session-123:__GET_stream');
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});
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});
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describe('Error response formatting', () => {
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it('should format JSON-RPC error responses correctly', () => {
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const errorResponse = {
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jsonrpc: '2.0',
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error: {
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code: -32000,
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message: 'Bad Request: No valid session ID provided',
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},
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id: null,
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};
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expect(errorResponse.jsonrpc).toBe('2.0');
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expect(errorResponse.error.code).toBe(-32000);
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expect(errorResponse.error.message).toContain('Bad Request');
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expect(errorResponse.id).toBe(null);
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});
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it('should format internal error responses correctly', () => {
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const internalErrorResponse = {
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jsonrpc: '2.0',
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error: {
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code: -32603,
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message: 'Internal error',
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},
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id: null,
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};
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expect(internalErrorResponse.jsonrpc).toBe('2.0');
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expect(internalErrorResponse.error.code).toBe(-32603);
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expect(internalErrorResponse.error.message).toBe('Internal error');
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expect(internalErrorResponse.id).toBe(null);
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});
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});
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describe('Request/Response patterns', () => {
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it('should handle typical MCP message structures', () => {
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const initializeRequest: JSONRPCMessage = {
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jsonrpc: '2.0',
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id: 1,
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method: 'initialize',
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params: {
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protocolVersion: '2024-11-05',
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capabilities: {},
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clientInfo: { name: 'test-client', version: '1.0.0' }
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}
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};
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const toolsListRequest: JSONRPCMessage = {
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jsonrpc: '2.0',
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id: 2,
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method: 'tools/list',
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params: {}
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};
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const toolsListResponse: JSONRPCMessage = {
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jsonrpc: '2.0',
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id: 2,
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result: {
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tools: [
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{
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name: 'echo',
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description: 'Echo the input',
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inputSchema: {
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type: 'object',
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properties: {
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text: { type: 'string' }
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}
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}
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}
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]
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}
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};
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expect(initializeRequest.method).toBe('initialize');
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expect(toolsListRequest.method).toBe('tools/list');
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expect(toolsListResponse.result).toBeDefined();
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expect(Array.isArray(toolsListResponse.result?.tools)).toBe(true);
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});
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});
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describe('HTTP header handling', () => {
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it('should extract session ID from headers', () => {
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const mockReq = {
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headers: {
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'mcp-session-id': 'test-session-123',
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'content-type': 'application/json'
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},
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body: {}
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} as Partial<Request>;
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const sessionId = mockReq.headers!['mcp-session-id'] as string;
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expect(sessionId).toBe('test-session-123');
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});
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it('should handle missing session ID in headers', () => {
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const mockReq = {
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headers: {
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'content-type': 'application/json'
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},
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body: {}
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} as Partial<Request>;
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const sessionId = mockReq.headers!['mcp-session-id'] as string | undefined;
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expect(sessionId).toBeUndefined();
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});
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});
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});
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@ -1,7 +1,7 @@
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import { AuthInfo } from "@modelcontextprotocol/sdk/server/auth/types.js";
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import { StreamableHTTPServerTransport } from "@modelcontextprotocol/sdk/server/streamableHttp.js";
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import { Request, Response } from "express";
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import { getFirstShttpTransport, getShttpTransport, isLive, RedisTransport, startServerListeningToRedis } from "../services/redisTransport.js";
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import { getFirstShttpTransport, getShttpTransport, isLive, startServerListeningToRedis } from "../services/redisTransport.js";
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import { isInitializeRequest } from "@modelcontextprotocol/sdk/types.js";
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import { randomUUID } from "crypto";
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import { createMcpServer } from "../services/mcp.js";
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@ -22,7 +22,7 @@ export async function handleStreamableHTTP(req: Request, res: Response) {
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console.log('Request headers:', JSON.stringify(req.headers, null, 2));
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let shttpTransport: StreamableHTTPServerTransport | undefined = undefined;
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let redisTransport: RedisTransport | undefined = undefined;
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let cleanup: (() => Promise<void>) | undefined = undefined;
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try {
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// Check for existing session ID
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const sessionId = req.headers['mcp-session-id'] as string | undefined;
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@ -31,9 +31,7 @@ export async function handleStreamableHTTP(req: Request, res: Response) {
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if (sessionId && await isLive(sessionId)) {
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console.log('Session is live, reusing existing transport for session:', sessionId);
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// Reuse existing transport
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// const { shttpTransport, redisTransport } = await getShttpTransport(sessionId);
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// destructuring to get both transports
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({ shttpTransport, redisTransport } = await getShttpTransport(sessionId));
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({ shttpTransport, cleanup } = await getShttpTransport(sessionId));
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console.log('Created transport for session:', sessionId);
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console.log('Retrieved transport from Redis for session:', sessionId);
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@ -49,7 +47,7 @@ export async function handleStreamableHTTP(req: Request, res: Response) {
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startServerListeningToRedis(server.server, sessionId)
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console.log('Started server listening to Redis for session:', sessionId);
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({ shttpTransport, redisTransport } = await getFirstShttpTransport(sessionId));
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({ shttpTransport, cleanup } = await getFirstShttpTransport(sessionId));
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console.log('Retrieved first transport for session:', sessionId);
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console.log('Transport object:', shttpTransport.constructor.name, 'sessionId:', shttpTransport.sessionId);
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} else {
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@ -101,7 +99,9 @@ export async function handleStreamableHTTP(req: Request, res: Response) {
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res.on('finish', async () => {
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console.log('HTTP response finished, closing transport');
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await shttpTransport?.close();
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// await redisTransport?.close();
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if (cleanup) {
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await cleanup();
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}
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console.log('Transport closed after response');
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});
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console.log('=== handleStreamableHTTP END ===');
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@ -9,7 +9,6 @@ import { handleFakeAuthorize, handleFakeAuthorizeRedirect } from "./handlers/fak
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import { handleStreamableHTTP } from "./handlers/shttp.js";
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import { handleMessage, handleSSEConnection } from "./handlers/sse.js";
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import { redisClient } from "./redis.js";
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import { AuthInfo } from "@modelcontextprotocol/sdk/server/auth/types.js";
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const app = express();
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324
src/services/redisTransport.test.ts
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324
src/services/redisTransport.test.ts
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@ -0,0 +1,324 @@
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import { jest } from '@jest/globals';
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import { JSONRPCMessage } from '@modelcontextprotocol/sdk/types.js';
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import { MockRedisClient, setRedisClient } from '../redis.js';
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import {
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ServerRedisTransport,
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redisRelayToMcpServer,
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isLive,
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startServerListeningToRedis
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} from './redisTransport.js';
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import { Transport } from '@modelcontextprotocol/sdk/shared/transport.js';
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import { createMcpServer } from './mcp.js';
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describe('Redis Transport', () => {
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let mockRedis: MockRedisClient;
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beforeEach(() => {
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mockRedis = new MockRedisClient();
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setRedisClient(mockRedis);
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jest.resetAllMocks();
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});
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afterEach(() => {
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// Clear all Redis data and subscriptions
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mockRedis.clear();
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});
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describe('ServerRedisTransport', () => {
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let transport: ServerRedisTransport;
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const sessionId = 'test-session-123';
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beforeEach(() => {
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transport = new ServerRedisTransport(sessionId);
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});
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it('should create transport with session ID', () => {
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expect(transport).toBeInstanceOf(ServerRedisTransport);
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});
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it('should start without subscribing (server only sends)', async () => {
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await transport.start();
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// Should not create any subscriptions since server only sends
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expect(mockRedis.numsub('any-channel')).resolves.toBe(0);
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});
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it('should send response messages to request-specific channels', async () => {
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const responseMessage: JSONRPCMessage = {
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jsonrpc: '2.0',
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id: 123,
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result: { data: 'test response' }
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};
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const mockSubscriber = jest.fn();
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await mockRedis.createSubscription(
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`mcp:shttp:toclient:${sessionId}:123`,
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mockSubscriber,
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jest.fn()
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);
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await transport.send(responseMessage, { relatedRequestId: 123 });
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expect(mockSubscriber).toHaveBeenCalledWith(
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JSON.stringify({
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message: responseMessage,
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options: { relatedRequestId: 123 }
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})
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);
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});
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it('should send notification messages to notification channel', async () => {
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const notificationMessage: JSONRPCMessage = {
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jsonrpc: '2.0',
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method: 'notifications/message',
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params: { message: 'test notification' }
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};
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const mockSubscriber = jest.fn();
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await mockRedis.createSubscription(
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`mcp:shttp:toclient:${sessionId}:__GET_stream`,
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mockSubscriber,
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jest.fn()
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);
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await transport.send(notificationMessage);
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expect(mockSubscriber).toHaveBeenCalledWith(
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JSON.stringify({
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message: notificationMessage,
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options: undefined
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})
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);
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});
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it('should handle close gracefully', async () => {
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const onCloseMock = jest.fn();
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transport.onclose = onCloseMock;
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await transport.close();
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expect(onCloseMock).toHaveBeenCalled();
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});
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});
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describe('redisRelayToMcpServer', () => {
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let mockTransport: Transport;
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const sessionId = 'test-session-456';
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beforeEach(() => {
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mockTransport = {
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onmessage: undefined,
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onclose: undefined,
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onerror: undefined,
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send: jest.fn(),
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close: jest.fn(),
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start: jest.fn()
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};
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});
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it('should set up message relay from transport to server', async () => {
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const cleanup = redisRelayToMcpServer(sessionId, mockTransport);
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// Simulate a message from the transport
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const requestMessage: JSONRPCMessage = {
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jsonrpc: '2.0',
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id: 'req-123',
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method: 'tools/list',
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params: {}
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};
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// Trigger the onmessage handler
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mockTransport.onmessage?.(requestMessage, { authInfo: { userId: 'test' } });
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|
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// Wait a bit for async processing
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await new Promise(resolve => setTimeout(resolve, 10));
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|
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// Check that message was published to server channel
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const serverSubscriber = jest.fn();
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await mockRedis.createSubscription(
|
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`mcp:shttp:toserver:${sessionId}`,
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serverSubscriber,
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jest.fn()
|
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);
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// The message should have been published
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expect(mockRedis.numsub(`mcp:shttp:toserver:${sessionId}`)).resolves.toBe(1);
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await cleanup();
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});
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it('should subscribe to response channel for request messages', async () => {
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const cleanup = redisRelayToMcpServer(sessionId, mockTransport);
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const requestMessage: JSONRPCMessage = {
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jsonrpc: '2.0',
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id: 'req-456',
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method: 'tools/call',
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params: { name: 'echo', arguments: { text: 'hello' } }
|
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};
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// Trigger the onmessage handler
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mockTransport.onmessage?.(requestMessage, { authInfo: { userId: 'test' } });
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// Wait for subscription setup
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await new Promise(resolve => setTimeout(resolve, 10));
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// Now simulate a response from the server
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const responseMessage: JSONRPCMessage = {
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jsonrpc: '2.0',
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id: 'req-456',
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result: { content: [{ type: 'text', text: 'hello' }] }
|
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};
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|
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await mockRedis.publish(
|
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`mcp:shttp:toclient:${sessionId}:req-456`,
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JSON.stringify({
|
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message: responseMessage,
|
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options: undefined
|
||||
})
|
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);
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|
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// Check that the response was sent back to the transport
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expect(mockTransport.send).toHaveBeenCalledWith(responseMessage, undefined);
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await cleanup();
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});
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|
||||
it('should not subscribe for notification messages (no id)', async () => {
|
||||
const cleanup = redisRelayToMcpServer(sessionId, mockTransport);
|
||||
|
||||
const notificationMessage: JSONRPCMessage = {
|
||||
jsonrpc: '2.0',
|
||||
method: 'notifications/message',
|
||||
params: { message: 'test' }
|
||||
};
|
||||
|
||||
// Trigger the onmessage handler
|
||||
mockTransport.onmessage?.(notificationMessage);
|
||||
|
||||
// Wait a bit
|
||||
await new Promise(resolve => setTimeout(resolve, 10));
|
||||
|
||||
// Should not create any response channel subscriptions
|
||||
expect(await mockRedis.numsub(`mcp:shttp:toclient:${sessionId}:undefined`)).toBe(0);
|
||||
|
||||
await cleanup();
|
||||
});
|
||||
});
|
||||
|
||||
describe('isLive', () => {
|
||||
const sessionId = 'test-session-789';
|
||||
|
||||
it('should return true when session has active subscribers', async () => {
|
||||
// Create a subscription to the server channel
|
||||
await mockRedis.createSubscription(
|
||||
`mcp:shttp:toserver:${sessionId}`,
|
||||
jest.fn(),
|
||||
jest.fn()
|
||||
);
|
||||
|
||||
expect(await isLive(sessionId)).toBe(true);
|
||||
});
|
||||
|
||||
it('should return false when session has no subscribers', async () => {
|
||||
expect(await isLive(sessionId)).toBe(false);
|
||||
});
|
||||
});
|
||||
|
||||
describe('startServerListeningToRedis', () => {
|
||||
const sessionId = 'test-session-server';
|
||||
|
||||
it('should connect server with ServerRedisTransport', async () => {
|
||||
const { server } = createMcpServer();
|
||||
const connectSpy = jest.spyOn(server, 'connect');
|
||||
|
||||
await startServerListeningToRedis(server, sessionId);
|
||||
|
||||
expect(connectSpy).toHaveBeenCalledWith(
|
||||
expect.any(ServerRedisTransport)
|
||||
);
|
||||
});
|
||||
|
||||
it('should create transport that can send responses', async () => {
|
||||
const { server } = createMcpServer();
|
||||
|
||||
await startServerListeningToRedis(server, sessionId);
|
||||
|
||||
// The server should now be connected and able to handle requests via Redis
|
||||
// This is tested implicitly by the connection succeeding
|
||||
expect(server).toBeDefined();
|
||||
});
|
||||
});
|
||||
|
||||
describe('Integration: Redis message flow', () => {
|
||||
const sessionId = 'integration-test-session';
|
||||
|
||||
it('should relay messages between client and server through Redis', async () => {
|
||||
// Set up client-side transport simulation
|
||||
const clientTransport: Transport = {
|
||||
onmessage: undefined,
|
||||
onclose: undefined,
|
||||
onerror: undefined,
|
||||
send: jest.fn(),
|
||||
close: jest.fn(),
|
||||
start: jest.fn()
|
||||
};
|
||||
|
||||
const cleanup = redisRelayToMcpServer(sessionId, clientTransport);
|
||||
|
||||
// Client sends a request
|
||||
const listToolsRequest: JSONRPCMessage = {
|
||||
jsonrpc: '2.0',
|
||||
id: 'integration-req-1',
|
||||
method: 'tools/list',
|
||||
params: {}
|
||||
};
|
||||
|
||||
// Set up subscription to simulate server receiving the message
|
||||
const serverSubscriber = jest.fn();
|
||||
await mockRedis.createSubscription(
|
||||
`mcp:shttp:toserver:${sessionId}`,
|
||||
serverSubscriber,
|
||||
jest.fn()
|
||||
);
|
||||
|
||||
// Simulate client sending request
|
||||
clientTransport.onmessage?.(listToolsRequest);
|
||||
|
||||
// Wait for async processing
|
||||
await new Promise(resolve => setTimeout(resolve, 10));
|
||||
|
||||
// Verify the message was published to server channel
|
||||
expect(serverSubscriber).toHaveBeenCalledWith(
|
||||
JSON.stringify({
|
||||
message: listToolsRequest,
|
||||
extra: undefined,
|
||||
options: undefined
|
||||
})
|
||||
);
|
||||
|
||||
// Simulate server sending response
|
||||
const serverResponse: JSONRPCMessage = {
|
||||
jsonrpc: '2.0',
|
||||
id: 'integration-req-1',
|
||||
result: { tools: [{ name: 'echo', description: 'Echo tool' }] }
|
||||
};
|
||||
|
||||
await mockRedis.publish(
|
||||
`mcp:shttp:toclient:${sessionId}:integration-req-1`,
|
||||
JSON.stringify({
|
||||
message: serverResponse,
|
||||
options: undefined
|
||||
})
|
||||
);
|
||||
|
||||
// Wait for response processing
|
||||
await new Promise(resolve => setTimeout(resolve, 10));
|
||||
|
||||
// Verify the response was sent back to client
|
||||
expect(clientTransport.send).toHaveBeenCalledWith(serverResponse, undefined);
|
||||
|
||||
await cleanup();
|
||||
});
|
||||
});
|
||||
});
|
||||
|
|
@ -6,16 +6,17 @@ import { JSONRPCMessage, MessageExtraInfo } from "@modelcontextprotocol/sdk/type
|
|||
import { Server } from "@modelcontextprotocol/sdk/server/index.js";
|
||||
|
||||
let redisTransportCounter = 0;
|
||||
const notificationStreamId = "__GET_stream";
|
||||
|
||||
interface RedisMessage {
|
||||
mcpMessage: JSONRPCMessage;
|
||||
message: JSONRPCMessage;
|
||||
extra?: MessageExtraInfo;
|
||||
options?: TransportSendOptions;
|
||||
}
|
||||
|
||||
function sendToMcpServer(sessionId: string, message: JSONRPCMessage, extra?: { authInfo?: AuthInfo; }, options?: TransportSendOptions): Promise<void> {
|
||||
const toServerChannel = getToServerChannel(sessionId);
|
||||
const redisMessage: RedisMessage = { mcpMessage: message, extra, options };
|
||||
const redisMessage: RedisMessage = { message, extra, options };
|
||||
console.log(`[sendToServerChannel] Publishing to ${toServerChannel}:`, JSON.stringify(redisMessage).substring(0, 100));
|
||||
return redisClient.publish(toServerChannel, JSON.stringify(redisMessage));
|
||||
}
|
||||
|
|
@ -63,7 +64,7 @@ export function redisRelayToMcpServer(sessionId: string, transport: Transport):
|
|||
|
||||
redisCleanup = await redisClient.createSubscription(toClientChannel, async (redisMessageJson) => {
|
||||
const redisMessage = JSON.parse(redisMessageJson) as RedisMessage;
|
||||
await transport.send(redisMessage.mcpMessage, redisMessage.options);
|
||||
await transport.send(redisMessage.message, redisMessage.options);
|
||||
}, (error) => {
|
||||
console.error(`[redisRelayToMcpServer] Error in Redis subscriber for ${toClientChannel}:`, error);
|
||||
transport.onerror?.(error);
|
||||
|
|
@ -78,134 +79,64 @@ export function redisRelayToMcpServer(sessionId: string, transport: Transport):
|
|||
}
|
||||
|
||||
|
||||
export class RedisTransport implements Transport {
|
||||
private redisCleanup: (() => Promise<void>) | undefined;
|
||||
// New Redis transport for server->client messages using request-id based channels
|
||||
export class ServerRedisTransport implements Transport {
|
||||
private counter: number;
|
||||
private _sessionId: string;
|
||||
|
||||
onclose?: (() => void) | undefined;
|
||||
onerror?: ((error: Error) => void) | undefined;
|
||||
onmessage?: ((message: JSONRPCMessage, extra?: { authInfo?: AuthInfo; }) => void) | undefined;
|
||||
|
||||
constructor(
|
||||
private sendChannel: string,
|
||||
private recvChannel: string,
|
||||
private isLiveKey: string | undefined = undefined
|
||||
) {
|
||||
constructor(sessionId: string) {
|
||||
this.counter = redisTransportCounter++;
|
||||
this.sendChannel = sendChannel;
|
||||
this.recvChannel = recvChannel;
|
||||
this.isLiveKey = isLiveKey;
|
||||
this._sessionId = sessionId;
|
||||
}
|
||||
|
||||
async start(): Promise<void> {
|
||||
console.log(`[RedisTransport.${this.counter}.start] Starting transport - send: ${this.sendChannel}, recv: ${this.recvChannel}`);
|
||||
if (this.redisCleanup) {
|
||||
throw new Error(`Redis transport already started for channels ${this.sendChannel} and ${this.recvChannel}`);
|
||||
}
|
||||
|
||||
// Log when onmessage is set
|
||||
console.log(`[RedisTransport.${this.counter}.start] onmessage handler is ${this.onmessage ? 'SET' : 'NOT SET'}`);
|
||||
|
||||
this.redisCleanup = await redisClient.createSubscription(
|
||||
this.recvChannel,
|
||||
(json) => {
|
||||
console.log(`[RedisTransport.${this.counter}] Received message on ${this.recvChannel}:`, json.substring(0, 100));
|
||||
const message = JSON.parse(json);
|
||||
const extra = popExtra(message);
|
||||
if (this.onmessage) {
|
||||
console.log(`[RedisTransport.${this.counter}] Calling onmessage handler for ${this.recvChannel}`);
|
||||
this.onmessage(message, extra)
|
||||
} else {
|
||||
console.log(`[RedisTransport.${this.counter}] WARNING: No onmessage handler for ${this.recvChannel}!`);
|
||||
}
|
||||
},
|
||||
(error) => {
|
||||
console.error(
|
||||
`[Redis transport] Disconnecting due to error in Redis subscriber:`,
|
||||
error,
|
||||
);
|
||||
this.close()
|
||||
},
|
||||
);
|
||||
console.log(`[RedisTransport.${this.counter}.start] Successfully subscribed to ${this.recvChannel}`);
|
||||
console.log(`[ServerRedisTransport.${this.counter}.start] Starting server transport for session: ${this._sessionId}`);
|
||||
// Server transport doesn't need to subscribe to anything - it only sends responses
|
||||
}
|
||||
|
||||
async send(message: JSONRPCMessage, options?: TransportSendOptions): Promise<void> {
|
||||
if (options) {
|
||||
setOptions(message, options);
|
||||
}
|
||||
const messageStr = JSON.stringify(message);
|
||||
console.log(`[RedisTransport.${this.counter}.send] Publishing to ${this.sendChannel}:`, messageStr.substring(0, 100));
|
||||
console.log(`[RedisTransport.${this.counter}.send] Full message:`, messageStr);
|
||||
await redisClient.publish(this.sendChannel, messageStr);
|
||||
console.log(`[RedisTransport.${this.counter}.send] Published successfully to ${this.sendChannel}`);
|
||||
}
|
||||
const relatedRequestId = options?.relatedRequestId?.toString() ?? notificationStreamId;
|
||||
const channel = getToClientChannel(this._sessionId, relatedRequestId)
|
||||
|
||||
|
||||
async cleanup(): Promise<void> {
|
||||
if (this.redisCleanup) {
|
||||
console.log(`[RedisTransport.${this.counter}.cleanup] Unsubscribing from ${this.recvChannel}`);
|
||||
await this.redisCleanup()
|
||||
this.redisCleanup = undefined;
|
||||
console.log(`[RedisTransport.${this.counter}.cleanup] Successfully unsubscribed from ${this.recvChannel}`);
|
||||
}
|
||||
if (this.isLiveKey) {
|
||||
await redisClient.del(this.isLiveKey);
|
||||
}
|
||||
const redisMessage: RedisMessage = { message, options };
|
||||
const messageStr = JSON.stringify(redisMessage);
|
||||
console.log(`[ServerRedisTransport.${this.counter}.send] Publishing to ${channel}:`, messageStr.substring(0, 100));
|
||||
await redisClient.publish(channel, messageStr);
|
||||
console.log(`[ServerRedisTransport.${this.counter}.send] Published successfully to ${channel}`);
|
||||
}
|
||||
|
||||
async close(): Promise<void> {
|
||||
console.log(`[RedisTransport.${this.counter}.close] Closing transport - send: ${this.sendChannel}, recv: ${this.recvChannel}`);
|
||||
console.log(`[ServerRedisTransport.${this.counter}.close] Closing server transport for session: ${this._sessionId}`);
|
||||
this.onclose?.();
|
||||
await this.cleanup()
|
||||
}
|
||||
}
|
||||
|
||||
export async function startServerListeningToRedis(server: Server, sessionId: string) {
|
||||
console.log(`[startServerListeningToRedis] Starting background server for session ${sessionId}`);
|
||||
const serverRedisTransport = createBackgroundTaskSideRedisTransport(sessionId)
|
||||
|
||||
// Log all messages sent by the server
|
||||
const originalSend = serverRedisTransport.send.bind(serverRedisTransport);
|
||||
serverRedisTransport.send = async (message, options) => {
|
||||
console.log(`[MCP Server -> Redis] Sending response:`, JSON.stringify(message).substring(0, 200));
|
||||
return originalSend(message, options);
|
||||
};
|
||||
const serverRedisTransport = new ServerRedisTransport(sessionId);
|
||||
|
||||
// The server.connect() will call start() on the transport
|
||||
await server.connect(serverRedisTransport)
|
||||
console.log(`[startServerListeningToRedis] Background server connected for session ${sessionId}`);
|
||||
}
|
||||
|
||||
function createShttpHandlerSideRedisTransport(sessionId: string): RedisTransport {
|
||||
return new RedisTransport(
|
||||
getToServerChannel(sessionId),
|
||||
getToClientChannel(sessionId),
|
||||
);
|
||||
}
|
||||
|
||||
function createBackgroundTaskSideRedisTransport(sessionId: string): RedisTransport {
|
||||
return new RedisTransport(
|
||||
getToClientChannel(sessionId),
|
||||
getToServerChannel(sessionId),
|
||||
);
|
||||
}
|
||||
|
||||
export async function getFirstShttpTransport(sessionId: string): Promise<{shttpTransport: StreamableHTTPServerTransport, redisTransport: RedisTransport}> {
|
||||
const transport = new StreamableHTTPServerTransport({
|
||||
export async function getFirstShttpTransport(sessionId: string): Promise<{shttpTransport: StreamableHTTPServerTransport, cleanup: () => Promise<void>}> {
|
||||
const shttpTransport = new StreamableHTTPServerTransport({
|
||||
sessionIdGenerator: () => sessionId,
|
||||
enableJsonResponse: true, // Enable JSON response mode
|
||||
});
|
||||
|
||||
const redisTransport = createShttpHandlerSideRedisTransport(sessionId);
|
||||
// Use the new request-id based relay approach
|
||||
const cleanup = redisRelayToMcpServer(sessionId, shttpTransport);
|
||||
|
||||
// When shttpTransport closes, so does the redisTransport
|
||||
relayTransports(redisTransport, transport);
|
||||
await redisTransport.start()
|
||||
return { shttpTransport: transport, redisTransport };
|
||||
return { shttpTransport, cleanup };
|
||||
}
|
||||
|
||||
export async function getShttpTransport(sessionId: string): Promise<{shttpTransport: StreamableHTTPServerTransport, redisTransport: RedisTransport}> {
|
||||
export async function getShttpTransport(sessionId: string): Promise<{shttpTransport: StreamableHTTPServerTransport, cleanup: () => Promise<void>}> {
|
||||
// Giving undefined here and setting the sessionId means the
|
||||
// transport wont try to create a new session.
|
||||
const shttpTransport = new StreamableHTTPServerTransport({
|
||||
|
|
@ -214,10 +145,8 @@ export async function getShttpTransport(sessionId: string): Promise<{shttpTransp
|
|||
})
|
||||
shttpTransport.sessionId = sessionId;
|
||||
|
||||
const redisTransport = createShttpHandlerSideRedisTransport(sessionId);
|
||||
// Use the new request-id based relay approach
|
||||
const cleanup = redisRelayToMcpServer(sessionId, shttpTransport);
|
||||
|
||||
// When shttpTransport closes, so does the redisTransport
|
||||
relayTransports(redisTransport, shttpTransport);
|
||||
await redisTransport.start()
|
||||
return { shttpTransport, redisTransport };
|
||||
return { shttpTransport, cleanup };
|
||||
}
|
||||
Loading…
Reference in a new issue