1370 lines
40 KiB
TypeScript
1370 lines
40 KiB
TypeScript
import type { AuthInfo } from '@modelcontextprotocol/sdk/server/auth/types.js'
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import { McpServer } from '@modelcontextprotocol/sdk/server/mcp.js'
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import type {
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EventId,
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EventStore,
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StreamId,
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} from '@modelcontextprotocol/sdk/server/streamableHttp.js'
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import type { CallToolResult, JSONRPCMessage } from '@modelcontextprotocol/sdk/types.js'
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import { Hono } from 'hono'
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import type { Context } from 'hono'
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import { HTTPException } from 'hono/http-exception'
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import { z } from 'zod'
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import { StreamableHTTPTransport } from './index'
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/**
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* Test server configuration for StreamableHTTPServerTransport tests
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*/
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interface TestServerConfig {
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sessionIdGenerator: (() => string) | undefined
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enableJsonResponse?: boolean
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customRequestHandler?: (ctx: Context, parsedBody?: unknown) => Promise<Response | undefined>
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eventStore?: EventStore
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}
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/**
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* Helper to create and start test HTTP server with MCP setup
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*/
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async function createTestServer(
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config: TestServerConfig = { sessionIdGenerator: () => crypto.randomUUID() }
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): Promise<{
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server: Hono
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transport: StreamableHTTPTransport
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mcpServer: McpServer
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}> {
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const mcpServer = new McpServer(
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{ name: 'test-server', version: '1.0.0' },
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{ capabilities: { logging: {} } }
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)
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mcpServer.tool(
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'greet',
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'A simple greeting tool',
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{ name: z.string().describe('Name to greet') },
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async ({ name }): Promise<CallToolResult> => {
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return { content: [{ type: 'text', text: `Hello, ${name}!` }] }
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}
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)
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const transport = new StreamableHTTPTransport({
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sessionIdGenerator: config.sessionIdGenerator,
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enableJsonResponse: config.enableJsonResponse ?? false,
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eventStore: config.eventStore,
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})
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await mcpServer.connect(transport)
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const server = new Hono().all(async (c) => {
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try {
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if (config.customRequestHandler) {
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return await config.customRequestHandler(c)
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}
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return await transport.handleRequest(c)
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} catch (error) {
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if (error instanceof HTTPException) {
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return error.getResponse()
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}
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console.error('Error handling request:', error)
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return c.text('Internal Server Error', 500)
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}
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})
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return { server, transport, mcpServer }
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}
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/**
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* Helper to create and start authenticated test HTTP server with MCP setup
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*/
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async function createTestAuthServer(
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config: TestServerConfig = { sessionIdGenerator: () => crypto.randomUUID() }
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): Promise<{
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server: Hono<{ Variables: { auth: AuthInfo } }>
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transport: StreamableHTTPTransport
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mcpServer: McpServer
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}> {
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const mcpServer = new McpServer(
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{ name: 'test-server', version: '1.0.0' },
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{ capabilities: { logging: {} } }
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)
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mcpServer.tool(
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'profile',
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'A user profile data tool',
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{ active: z.boolean().describe('Profile status') },
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async ({ active }, { authInfo }): Promise<CallToolResult> => {
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return {
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content: [
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{
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type: 'text',
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text: `${active ? 'Active' : 'Inactive'} profile from token: ${authInfo?.token}!`,
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},
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],
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}
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}
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)
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const transport = new StreamableHTTPTransport({
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sessionIdGenerator: config.sessionIdGenerator,
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enableJsonResponse: config.enableJsonResponse ?? false,
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eventStore: config.eventStore,
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})
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await mcpServer.connect(transport)
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const server = new Hono<{ Variables: { auth: AuthInfo } }>().all(async (c) => {
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try {
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if (config.customRequestHandler) {
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return await config.customRequestHandler(c)
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}
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c.set('auth', {
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token: c.req.header('Authorization')?.split(' ')[1],
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} as AuthInfo)
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return await transport.handleRequest(c)
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} catch (error) {
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if (error instanceof HTTPException) {
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return error.getResponse()
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}
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console.error('Error handling request:', error)
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return c.text('Internal Server Error', 500)
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}
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})
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return { server, transport, mcpServer }
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}
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/**
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* Helper to stop test server
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*/
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async function stopTestServer({
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transport,
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}: {
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transport: StreamableHTTPTransport
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}): Promise<void> {
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// First close the transport to ensure all SSE streams are closed
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await transport.close()
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}
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/**
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* Common test messages
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*/
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const TEST_MESSAGES = {
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initialize: {
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jsonrpc: '2.0',
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method: 'initialize',
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params: {
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clientInfo: { name: 'test-client', version: '1.0' },
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protocolVersion: '2025-03-26',
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capabilities: {},
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},
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id: 'init-1',
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} as JSONRPCMessage,
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toolsList: {
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jsonrpc: '2.0',
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method: 'tools/list',
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params: {},
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id: 'tools-1',
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} as JSONRPCMessage,
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}
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/**
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* Helper to extract text from SSE response
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* Note: Can only be called once per response stream. For multiple reads,
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* get the reader manually and read multiple times.
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*/
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async function readSSEEvent(response: Response): Promise<string> {
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const reader = response.body?.getReader()
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const { value } = await reader!.read()
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return new TextDecoder().decode(value)
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}
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/**
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* Read a specific number of SSE events
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*/
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async function readNSSEEvents(response: Response, count: number): Promise<string> {
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const reader = response.body?.getReader()
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if (!reader) {
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throw new Error('No response body reader available')
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}
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const events: string[] = []
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const decoder = new TextDecoder()
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try {
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while (events.length < count) {
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const { done, value } = await reader.read()
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if (done) {
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break
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}
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const chunk = decoder.decode(value, { stream: true })
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const eventChunks = chunk.split('\n\n').filter((event) => event.trim())
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events.push(...eventChunks)
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}
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} finally {
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reader.releaseLock()
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}
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return events.slice(0, count).join('')
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}
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/**
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* Helper to send JSON-RPC request
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*/
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async function sendPostRequest(
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server: Hono | Hono<{ Variables: { auth: AuthInfo } }>,
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message: JSONRPCMessage | JSONRPCMessage[],
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sessionId?: string,
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extraHeaders?: Record<string, string>
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): Promise<Response> {
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const headers: Record<string, string> = {
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'Content-Type': 'application/json',
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Accept: 'application/json, text/event-stream',
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...extraHeaders,
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}
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if (sessionId) {
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headers['mcp-session-id'] = sessionId
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}
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return server.request('/', {
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method: 'POST',
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headers,
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body: JSON.stringify(message),
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})
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}
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function expectErrorResponse(
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data: unknown,
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expectedCode: number,
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expectedMessagePattern: RegExp
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): void {
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expect(data).toMatchObject({
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jsonrpc: '2.0',
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error: expect.objectContaining({
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code: expectedCode,
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message: expect.stringMatching(expectedMessagePattern),
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}),
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})
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}
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describe('MCP helper', () => {
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let server: Hono
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let transport: StreamableHTTPTransport
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let sessionId: string
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beforeEach(async () => {
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const result = await createTestServer()
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server = result.server
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transport = result.transport
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})
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afterEach(async () => {
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await stopTestServer({ transport })
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})
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async function initializeServer(): Promise<string> {
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const response = await sendPostRequest(server, TEST_MESSAGES.initialize)
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expect(response.status).toBe(200)
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const newSessionId = response.headers.get('mcp-session-id')
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expect(newSessionId).toBeDefined()
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return newSessionId as string
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}
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it('should initialize server and generate session ID', async () => {
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const response = await sendPostRequest(server, TEST_MESSAGES.initialize)
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expect(response.status).toBe(200)
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expect(response.headers.get('content-type')).toBe('text/event-stream')
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expect(response.headers.get('mcp-session-id')).toBeDefined()
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})
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it('should reject second initialization request', async () => {
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// First initialize
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const sessionId = await initializeServer()
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expect(sessionId).toBeDefined()
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// Try second initialize
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const secondInitMessage = {
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...TEST_MESSAGES.initialize,
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id: 'second-init',
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}
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const response = await sendPostRequest(server, secondInitMessage)
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expect(response.status).toBe(400)
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const errorData = await response.json()
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expectErrorResponse(errorData, -32600, /Server already initialized/)
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})
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it('should reject batch initialize request', async () => {
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const batchInitMessages: JSONRPCMessage[] = [
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TEST_MESSAGES.initialize,
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{
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jsonrpc: '2.0',
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method: 'initialize',
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params: {
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clientInfo: { name: 'test-client-2', version: '1.0' },
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protocolVersion: '2025-03-26',
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},
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id: 'init-2',
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},
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]
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const response = await sendPostRequest(server, batchInitMessages)
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expect(response.status).toBe(400)
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const errorData = await response.json()
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expectErrorResponse(errorData, -32600, /Only one initialization request is allowed/)
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})
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it('should pandle post requests via sse response correctly', async () => {
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sessionId = await initializeServer()
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const response = await sendPostRequest(server, TEST_MESSAGES.toolsList, sessionId)
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expect(response.status).toBe(200)
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// Read the SSE stream for the response
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const text = await readSSEEvent(response)
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// Parse the SSE event
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const eventLines = text.split('\n')
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const dataLine = eventLines.find((line) => line.startsWith('data:'))
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expect(dataLine).toBeDefined()
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const eventData = JSON.parse(dataLine!.substring(5))
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expect(eventData).toMatchObject({
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jsonrpc: '2.0',
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result: expect.objectContaining({
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tools: expect.arrayContaining([
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expect.objectContaining({
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name: 'greet',
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description: 'A simple greeting tool',
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}),
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]),
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}),
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id: 'tools-1',
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})
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})
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it('should call a tool and return the result', async () => {
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sessionId = await initializeServer()
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const toolCallMessage: JSONRPCMessage = {
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jsonrpc: '2.0',
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method: 'tools/call',
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params: {
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name: 'greet',
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arguments: {
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name: 'Test User',
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},
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},
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id: 'call-1',
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}
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const response = await sendPostRequest(server, toolCallMessage, sessionId)
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expect(response.status).toBe(200)
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const text = await readSSEEvent(response)
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const eventLines = text.split('\n')
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const dataLine = eventLines.find((line) => line.startsWith('data:'))
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expect(dataLine).toBeDefined()
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const eventData = JSON.parse(dataLine!.substring(5))
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expect(eventData).toMatchObject({
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jsonrpc: '2.0',
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result: {
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content: [
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{
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type: 'text',
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text: 'Hello, Test User!',
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},
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],
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},
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id: 'call-1',
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})
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})
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it('should reject requests without a valid session ID', async () => {
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const response = await sendPostRequest(server, TEST_MESSAGES.toolsList)
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expect(response.status).toBe(400)
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const errorData = await response.json()
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expectErrorResponse(errorData, -32000, /Bad Request/)
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expect(errorData.id).toBeNull()
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})
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it('should reject invalid session ID', async () => {
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// First initialize to be in valid state
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await initializeServer()
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// Now try with invalid session ID
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const response = await sendPostRequest(server, TEST_MESSAGES.toolsList, 'invalid-session-id')
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expect(response.status).toBe(404)
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const errorData = await response.json()
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expectErrorResponse(errorData, -32001, /Session not found/)
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})
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it('should establish standalone SSE stream and receive server-initiated messages', async () => {
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// First initialize to get a session ID
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sessionId = await initializeServer()
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// Open a standalone SSE stream
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const sseResponse = await server.request('/', {
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method: 'GET',
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headers: {
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Accept: 'text/event-stream',
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'mcp-session-id': sessionId,
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},
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})
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expect(sseResponse.status).toBe(200)
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expect(sseResponse.headers.get('content-type')).toBe('text/event-stream')
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// Send a notification (server-initiated message) that should appear on SSE stream
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const notification: JSONRPCMessage = {
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jsonrpc: '2.0',
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method: 'notifications/message',
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params: { level: 'info', data: 'Test notification' },
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}
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// Send the notification via transport
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await transport.send(notification)
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// Read from the stream and verify we got the notification
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const text = await readSSEEvent(sseResponse)
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const eventLines = text.split('\n')
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const dataLine = eventLines.find((line) => line.startsWith('data:'))
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expect(dataLine).toBeDefined()
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const eventData = JSON.parse(dataLine!.substring(5))
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expect(eventData).toMatchObject({
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jsonrpc: '2.0',
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method: 'notifications/message',
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params: { level: 'info', data: 'Test notification' },
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})
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})
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it('should not close GET SSE stream after sending multiple server notifications', async () => {
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sessionId = await initializeServer()
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// Open a standalone SSE stream
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const sseResponse = await server.request('/', {
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method: 'GET',
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headers: {
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Accept: 'text/event-stream',
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'mcp-session-id': sessionId,
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},
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})
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expect(sseResponse.status).toBe(200)
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const reader = sseResponse.body?.getReader()
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// Send multiple notifications
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const notification1: JSONRPCMessage = {
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jsonrpc: '2.0',
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method: 'notifications/message',
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params: { level: 'info', data: 'First notification' },
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}
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// Just send one and verify it comes through - then the stream should stay open
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await transport.send(notification1)
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const { value, done } = await reader!.read()
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const text = new TextDecoder().decode(value)
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expect(text).toContain('First notification')
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expect(done).toBe(false) // Stream should still be open
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})
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it('should reject second SSE stream for the same session', async () => {
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sessionId = await initializeServer()
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// Open first SSE stream
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const firstStream = await server.request('/', {
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method: 'GET',
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headers: {
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Accept: 'text/event-stream',
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'mcp-session-id': sessionId,
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},
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})
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expect(firstStream.status).toBe(200)
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// Try to open a second SSE stream with the same session ID
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const secondStream = await server.request('/', {
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method: 'GET',
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headers: {
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Accept: 'text/event-stream',
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'mcp-session-id': sessionId,
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},
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})
|
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|
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// Should be rejected
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expect(secondStream.status).toBe(409) // Conflict
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const errorData = await secondStream.json()
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expectErrorResponse(errorData, -32000, /Only one SSE stream is allowed per session/)
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})
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it('should reject GET requests without Accept: text/event-stream header', async () => {
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sessionId = await initializeServer()
|
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|
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// Try GET without proper Accept header
|
|
const response = await server.request('/', {
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method: 'GET',
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headers: {
|
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Accept: 'application/json',
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'mcp-session-id': sessionId,
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},
|
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})
|
|
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expect(response.status).toBe(406)
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|
const errorData = await response.json()
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expectErrorResponse(errorData, -32000, /Client must accept text\/event-stream/)
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|
})
|
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|
|
it('should reject POST requests without proper Accept header', async () => {
|
|
sessionId = await initializeServer()
|
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|
|
// Try POST without Accept: text/event-stream
|
|
const response = await server.request('/', {
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method: 'POST',
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headers: {
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'Content-Type': 'application/json',
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Accept: 'application/json', // Missing text/event-stream
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'mcp-session-id': sessionId,
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},
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body: JSON.stringify(TEST_MESSAGES.toolsList),
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})
|
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|
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expect(response.status).toBe(406)
|
|
const errorData = await response.json()
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|
expectErrorResponse(
|
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errorData,
|
|
-32000,
|
|
/Client must accept both application\/json and text\/event-stream/
|
|
)
|
|
})
|
|
|
|
it('should reject unsupported Content-Type', async () => {
|
|
sessionId = await initializeServer()
|
|
|
|
// Try POST with text/plain Content-Type
|
|
const response = await server.request('/', {
|
|
method: 'POST',
|
|
headers: {
|
|
'Content-Type': 'text/plain',
|
|
Accept: 'application/json, text/event-stream',
|
|
'mcp-session-id': sessionId,
|
|
},
|
|
body: 'This is plain text',
|
|
})
|
|
|
|
expect(response.status).toBe(415)
|
|
const errorData = await response.json()
|
|
expectErrorResponse(errorData, -32000, /Content-Type must be application\/json/)
|
|
})
|
|
|
|
it('should handle JSON-RPC batch notification messages with 202 response', async () => {
|
|
sessionId = await initializeServer()
|
|
|
|
// Send batch of notifications (no IDs)
|
|
const batchNotifications: JSONRPCMessage[] = [
|
|
{ jsonrpc: '2.0', method: 'someNotification1', params: {} },
|
|
{ jsonrpc: '2.0', method: 'someNotification2', params: {} },
|
|
]
|
|
const response = await sendPostRequest(server, batchNotifications, sessionId)
|
|
|
|
expect(response.status).toBe(202)
|
|
})
|
|
|
|
it('should handle batch request messages with SSE stream for responses', async () => {
|
|
sessionId = await initializeServer()
|
|
|
|
// Send batch of requests
|
|
const batchRequests: JSONRPCMessage[] = [
|
|
{
|
|
jsonrpc: '2.0',
|
|
method: 'tools/call',
|
|
params: { name: 'greet', arguments: { name: 'BatchUser' } },
|
|
id: 'req-2',
|
|
},
|
|
{ jsonrpc: '2.0', method: 'tools/list', params: {}, id: 'req-1' },
|
|
]
|
|
const response = await sendPostRequest(server, batchRequests, sessionId)
|
|
|
|
expect(response.status).toBe(200)
|
|
expect(response.headers.get('content-type')).toBe('text/event-stream')
|
|
|
|
const text = await readNSSEEvents(response, 2)
|
|
|
|
// Check that both responses were sent on the same stream
|
|
expect(text).toContain('"id":"req-1"')
|
|
expect(text).toContain('"tools"') // tools/list result
|
|
expect(text).toContain('"id":"req-2"')
|
|
expect(text).toContain('Hello, BatchUser') // tools/call result
|
|
})
|
|
|
|
it('should properly handle invalid JSON data', async () => {
|
|
sessionId = await initializeServer()
|
|
|
|
// Send invalid JSON
|
|
const response = await server.request('/', {
|
|
method: 'POST',
|
|
headers: {
|
|
'Content-Type': 'application/json',
|
|
Accept: 'application/json, text/event-stream',
|
|
'mcp-session-id': sessionId,
|
|
},
|
|
body: 'This is not valid JSON',
|
|
})
|
|
|
|
expect(response.status).toBe(400)
|
|
const errorData = await response.json()
|
|
expectErrorResponse(errorData, -32700, /Parse error/)
|
|
})
|
|
|
|
it('should return 400 error for invalid JSON-RPC messages', async () => {
|
|
sessionId = await initializeServer()
|
|
|
|
// Invalid JSON-RPC (missing required jsonrpc version)
|
|
const invalidMessage = { method: 'tools/list', params: {}, id: 1 } // missing jsonrpc version
|
|
const response = await sendPostRequest(server, invalidMessage as JSONRPCMessage, sessionId)
|
|
|
|
expect(response.status).toBe(400)
|
|
const errorData = await response.json()
|
|
expect(errorData).toMatchObject({
|
|
jsonrpc: '2.0',
|
|
error: expect.anything(),
|
|
})
|
|
})
|
|
|
|
it('should reject requests to uninitialized server', async () => {
|
|
// Create a new HTTP server and transport without initializing
|
|
const { server: uninitializedServer, transport: uninitializedTransport } =
|
|
await createTestServer()
|
|
// Transport not used in test but needed for cleanup
|
|
|
|
// No initialization, just send a request directly
|
|
const uninitializedMessage: JSONRPCMessage = {
|
|
jsonrpc: '2.0',
|
|
method: 'tools/list',
|
|
params: {},
|
|
id: 'uninitialized-test',
|
|
}
|
|
|
|
// Send a request to uninitialized server
|
|
const response = await sendPostRequest(
|
|
uninitializedServer,
|
|
uninitializedMessage,
|
|
'any-session-id'
|
|
)
|
|
|
|
expect(response.status).toBe(400)
|
|
const errorData = await response.json()
|
|
expectErrorResponse(errorData, -32000, /Server not initialized/)
|
|
|
|
// Cleanup
|
|
await stopTestServer({ transport: uninitializedTransport })
|
|
})
|
|
|
|
it('should send response messages to the connection that sent the request', async () => {
|
|
sessionId = await initializeServer()
|
|
|
|
const message1: JSONRPCMessage = {
|
|
jsonrpc: '2.0',
|
|
method: 'tools/list',
|
|
params: {},
|
|
id: 'req-1',
|
|
}
|
|
|
|
const message2: JSONRPCMessage = {
|
|
jsonrpc: '2.0',
|
|
method: 'tools/call',
|
|
params: {
|
|
name: 'greet',
|
|
arguments: { name: 'Connection2' },
|
|
},
|
|
id: 'req-2',
|
|
}
|
|
|
|
// Make two concurrent fetch connections for different requests
|
|
const req1 = sendPostRequest(server, message1, sessionId)
|
|
const req2 = sendPostRequest(server, message2, sessionId)
|
|
|
|
// Get both responses
|
|
const [response1, response2] = await Promise.all([req1, req2])
|
|
const reader1 = response1.body?.getReader()
|
|
const reader2 = response2.body?.getReader()
|
|
|
|
// Read responses from each stream (requires each receives its specific response)
|
|
const { value: value1 } = await reader1!.read()
|
|
const text1 = new TextDecoder().decode(value1)
|
|
expect(text1).toContain('"id":"req-1"')
|
|
expect(text1).toContain('"tools"') // tools/list result
|
|
|
|
const { value: value2 } = await reader2!.read()
|
|
const text2 = new TextDecoder().decode(value2)
|
|
expect(text2).toContain('"id":"req-2"')
|
|
expect(text2).toContain('Hello, Connection2') // tools/call result
|
|
})
|
|
|
|
it('should keep stream open after sending server notifications', async () => {
|
|
sessionId = await initializeServer()
|
|
|
|
// Open a standalone SSE stream
|
|
const sseResponse = await server.request('/', {
|
|
method: 'GET',
|
|
headers: {
|
|
Accept: 'text/event-stream',
|
|
'mcp-session-id': sessionId,
|
|
},
|
|
})
|
|
|
|
// Send several server-initiated notifications
|
|
await transport.send({
|
|
jsonrpc: '2.0',
|
|
method: 'notifications/message',
|
|
params: { level: 'info', data: 'First notification' },
|
|
})
|
|
|
|
// TODO: First time the streamSSE works, but the second time it gets stuck
|
|
// await transport.send({
|
|
// jsonrpc: "2.0",
|
|
// method: "notifications/message",
|
|
// params: { level: "info", data: "Second notification" },
|
|
// });
|
|
|
|
// Stream should still be open - it should not close after sending notifications
|
|
expect(sseResponse.bodyUsed).toBe(false)
|
|
})
|
|
|
|
// The current implementation will close the entire transport for DELETE
|
|
// Creating a temporary transport/server where we don't care if it gets closed
|
|
it('should properly handle DELETE requests and close session', async () => {
|
|
// Setup a temporary server for this test
|
|
const tempResult = await createTestServer()
|
|
const tempServer = tempResult.server
|
|
|
|
// Initialize to get a session ID
|
|
const initResponse = await sendPostRequest(tempServer, TEST_MESSAGES.initialize)
|
|
const tempSessionId = initResponse.headers.get('mcp-session-id')
|
|
|
|
// Now DELETE the session
|
|
const deleteResponse = await tempServer.request('/', {
|
|
method: 'DELETE',
|
|
headers: { 'mcp-session-id': tempSessionId || '' },
|
|
})
|
|
|
|
expect(deleteResponse.status).toBe(200)
|
|
})
|
|
|
|
it('should reject DELETE requests with invalid session ID', async () => {
|
|
// Initialize the server first to activate it
|
|
sessionId = await initializeServer()
|
|
|
|
// Try to delete with invalid session ID
|
|
const response = await server.request('/', {
|
|
method: 'DELETE',
|
|
headers: { 'mcp-session-id': 'invalid-session-id' },
|
|
})
|
|
|
|
expect(response.status).toBe(404)
|
|
const errorData = await response.json()
|
|
expectErrorResponse(errorData, -32001, /Session not found/)
|
|
})
|
|
})
|
|
|
|
describe('StreamableHTTPServerTransport with AuthInfo', () => {
|
|
let server: Hono<{ Variables: { auth: AuthInfo } }>
|
|
let transport: StreamableHTTPTransport
|
|
let sessionId: string
|
|
|
|
beforeEach(async () => {
|
|
const result = await createTestAuthServer()
|
|
server = result.server
|
|
transport = result.transport
|
|
})
|
|
|
|
afterEach(async () => {
|
|
await stopTestServer({ transport })
|
|
})
|
|
|
|
async function initializeServer(): Promise<string> {
|
|
const response = await sendPostRequest(server, TEST_MESSAGES.initialize)
|
|
|
|
expect(response.status).toBe(200)
|
|
const newSessionId = response.headers.get('mcp-session-id')
|
|
expect(newSessionId).toBeDefined()
|
|
return newSessionId as string
|
|
}
|
|
|
|
it('should call a tool with authInfo', async () => {
|
|
sessionId = await initializeServer()
|
|
|
|
const toolCallMessage: JSONRPCMessage = {
|
|
jsonrpc: '2.0',
|
|
method: 'tools/call',
|
|
params: {
|
|
name: 'profile',
|
|
arguments: { active: true },
|
|
},
|
|
id: 'call-1',
|
|
}
|
|
|
|
const response = await sendPostRequest(server, toolCallMessage, sessionId, {
|
|
authorization: 'Bearer test-token',
|
|
})
|
|
expect(response.status).toBe(200)
|
|
|
|
const text = await readSSEEvent(response)
|
|
const eventLines = text.split('\n')
|
|
const dataLine = eventLines.find((line) => line.startsWith('data:'))
|
|
expect(dataLine).toBeDefined()
|
|
|
|
const eventData = JSON.parse(dataLine!.substring(5))
|
|
expect(eventData).toMatchObject({
|
|
jsonrpc: '2.0',
|
|
result: {
|
|
content: [
|
|
{
|
|
type: 'text',
|
|
text: 'Active profile from token: test-token!',
|
|
},
|
|
],
|
|
},
|
|
id: 'call-1',
|
|
})
|
|
})
|
|
|
|
it('should calls tool without authInfo when it is optional', async () => {
|
|
sessionId = await initializeServer()
|
|
|
|
const toolCallMessage: JSONRPCMessage = {
|
|
jsonrpc: '2.0',
|
|
method: 'tools/call',
|
|
params: {
|
|
name: 'profile',
|
|
arguments: { active: false },
|
|
},
|
|
id: 'call-1',
|
|
}
|
|
|
|
const response = await sendPostRequest(server, toolCallMessage, sessionId)
|
|
expect(response.status).toBe(200)
|
|
|
|
const text = await readSSEEvent(response)
|
|
const eventLines = text.split('\n')
|
|
const dataLine = eventLines.find((line) => line.startsWith('data:'))
|
|
expect(dataLine).toBeDefined()
|
|
|
|
const eventData = JSON.parse(dataLine!.substring(5))
|
|
expect(eventData).toMatchObject({
|
|
jsonrpc: '2.0',
|
|
result: {
|
|
content: [
|
|
{
|
|
type: 'text',
|
|
text: 'Inactive profile from token: undefined!',
|
|
},
|
|
],
|
|
},
|
|
id: 'call-1',
|
|
})
|
|
})
|
|
})
|
|
|
|
// Test JSON Response Mode
|
|
describe('StreamableHTTPServerTransport with JSON Response Mode', () => {
|
|
let server: Hono
|
|
let transport: StreamableHTTPTransport
|
|
let sessionId: string
|
|
|
|
beforeEach(async () => {
|
|
const result = await createTestServer({
|
|
sessionIdGenerator: () => crypto.randomUUID(),
|
|
enableJsonResponse: true,
|
|
})
|
|
server = result.server
|
|
transport = result.transport
|
|
|
|
// Initialize and get session ID
|
|
const initResponse = await sendPostRequest(server, TEST_MESSAGES.initialize)
|
|
|
|
sessionId = initResponse.headers.get('mcp-session-id') as string
|
|
})
|
|
|
|
afterEach(async () => {
|
|
await stopTestServer({ transport })
|
|
})
|
|
|
|
it('should return JSON response for a single request', async () => {
|
|
const toolsListMessage: JSONRPCMessage = {
|
|
jsonrpc: '2.0',
|
|
method: 'tools/list',
|
|
params: {},
|
|
id: 'json-req-1',
|
|
}
|
|
|
|
const response = await sendPostRequest(server, toolsListMessage, sessionId)
|
|
|
|
expect(response.status).toBe(200)
|
|
expect(response.headers.get('content-type')).toBe('application/json')
|
|
|
|
const result = await response.json()
|
|
expect(result).toMatchObject({
|
|
jsonrpc: '2.0',
|
|
result: expect.objectContaining({
|
|
tools: expect.arrayContaining([expect.objectContaining({ name: 'greet' })]),
|
|
}),
|
|
id: 'json-req-1',
|
|
})
|
|
})
|
|
|
|
it('should return JSON response for batch requests', async () => {
|
|
const batchMessages: JSONRPCMessage[] = [
|
|
{ jsonrpc: '2.0', method: 'tools/list', params: {}, id: 'batch-1' },
|
|
{
|
|
jsonrpc: '2.0',
|
|
method: 'tools/call',
|
|
params: { name: 'greet', arguments: { name: 'JSON' } },
|
|
id: 'batch-2',
|
|
},
|
|
]
|
|
|
|
const response = await sendPostRequest(server, batchMessages, sessionId)
|
|
|
|
expect(response.status).toBe(200)
|
|
expect(response.headers.get('content-type')).toBe('application/json')
|
|
|
|
const results = await response.json()
|
|
expect(Array.isArray(results)).toBe(true)
|
|
expect(results).toHaveLength(2)
|
|
|
|
// Batch responses can come in any order
|
|
const listResponse = results.find((r: { id?: string }) => r.id === 'batch-1')
|
|
const callResponse = results.find((r: { id?: string }) => r.id === 'batch-2')
|
|
|
|
expect(listResponse).toEqual(
|
|
expect.objectContaining({
|
|
jsonrpc: '2.0',
|
|
id: 'batch-1',
|
|
result: expect.objectContaining({
|
|
tools: expect.arrayContaining([expect.objectContaining({ name: 'greet' })]),
|
|
}),
|
|
})
|
|
)
|
|
|
|
expect(callResponse).toEqual(
|
|
expect.objectContaining({
|
|
jsonrpc: '2.0',
|
|
id: 'batch-2',
|
|
result: expect.objectContaining({
|
|
content: expect.arrayContaining([
|
|
expect.objectContaining({ type: 'text', text: 'Hello, JSON!' }),
|
|
]),
|
|
}),
|
|
})
|
|
)
|
|
})
|
|
})
|
|
|
|
// Test pre-parsed body handling
|
|
describe('StreamableHTTPServerTransport with pre-parsed body', () => {
|
|
let server: Hono
|
|
let transport: StreamableHTTPTransport
|
|
let sessionId: string
|
|
let parsedBody: unknown = null
|
|
|
|
beforeEach(async () => {
|
|
const result = await createTestServer({
|
|
customRequestHandler: async (ctx) => {
|
|
try {
|
|
if (parsedBody !== null) {
|
|
const response = await transport.handleRequest(ctx, parsedBody)
|
|
parsedBody = null // Reset after use
|
|
|
|
return response
|
|
}
|
|
|
|
return await transport.handleRequest(ctx)
|
|
} catch (error) {
|
|
console.error('Error handling request:', error)
|
|
ctx.text('Internal Server Error', 500)
|
|
}
|
|
},
|
|
sessionIdGenerator: () => crypto.randomUUID(),
|
|
})
|
|
|
|
server = result.server
|
|
transport = result.transport
|
|
|
|
// Initialize and get session ID
|
|
const initResponse = await sendPostRequest(server, TEST_MESSAGES.initialize)
|
|
sessionId = initResponse.headers.get('mcp-session-id') as string
|
|
})
|
|
|
|
afterEach(async () => {
|
|
await stopTestServer({ transport })
|
|
})
|
|
|
|
it('should accept pre-parsed request body', async () => {
|
|
// Set up the pre-parsed body
|
|
parsedBody = {
|
|
jsonrpc: '2.0',
|
|
method: 'tools/list',
|
|
params: {},
|
|
id: 'preparsed-1',
|
|
}
|
|
|
|
// Send an empty body since we'll use pre-parsed body
|
|
const response = await server.request('/', {
|
|
method: 'POST',
|
|
headers: {
|
|
'Content-Type': 'application/json',
|
|
Accept: 'application/json, text/event-stream',
|
|
'mcp-session-id': sessionId,
|
|
},
|
|
// Empty body - we're testing pre-parsed body
|
|
body: '',
|
|
})
|
|
|
|
expect(response.status).toBe(200)
|
|
expect(response.headers.get('content-type')).toBe('text/event-stream')
|
|
|
|
const reader = response.body?.getReader()
|
|
const { value } = await reader!.read()
|
|
const text = new TextDecoder().decode(value)
|
|
|
|
// Verify the response used the pre-parsed body
|
|
expect(text).toContain('"id":"preparsed-1"')
|
|
expect(text).toContain('"tools"')
|
|
})
|
|
|
|
it('should handle pre-parsed batch messages', async () => {
|
|
parsedBody = [
|
|
{ jsonrpc: '2.0', method: 'tools/list', params: {}, id: 'batch-1' },
|
|
{
|
|
jsonrpc: '2.0',
|
|
method: 'tools/call',
|
|
params: { name: 'greet', arguments: { name: 'PreParsed' } },
|
|
id: 'batch-2',
|
|
},
|
|
]
|
|
|
|
const response = await server.request('/', {
|
|
method: 'POST',
|
|
headers: {
|
|
'Content-Type': 'application/json',
|
|
Accept: 'application/json, text/event-stream',
|
|
'mcp-session-id': sessionId,
|
|
},
|
|
body: '', // Empty as we're using pre-parsed
|
|
})
|
|
|
|
expect(response.status).toBe(200)
|
|
|
|
const reader = response.body?.getReader()
|
|
const { value } = await reader!.read()
|
|
const text = new TextDecoder().decode(value)
|
|
|
|
expect(text).toContain('"id":"batch-1"')
|
|
expect(text).toContain('"tools"')
|
|
})
|
|
|
|
it('should prefer pre-parsed body over request body', async () => {
|
|
// Set pre-parsed to tools/list
|
|
parsedBody = {
|
|
jsonrpc: '2.0',
|
|
method: 'tools/list',
|
|
params: {},
|
|
id: 'preparsed-wins',
|
|
}
|
|
|
|
// Send actual body with tools/call - should be ignored
|
|
const response = await server.request('/', {
|
|
method: 'POST',
|
|
headers: {
|
|
'Content-Type': 'application/json',
|
|
Accept: 'application/json, text/event-stream',
|
|
'mcp-session-id': sessionId,
|
|
},
|
|
body: JSON.stringify({
|
|
jsonrpc: '2.0',
|
|
method: 'tools/call',
|
|
params: { name: 'greet', arguments: { name: 'Ignored' } },
|
|
id: 'ignored-id',
|
|
}),
|
|
})
|
|
|
|
expect(response.status).toBe(200)
|
|
|
|
const text = await readSSEEvent(response)
|
|
|
|
// Should have processed the pre-parsed body
|
|
expect(text).toContain('"id":"preparsed-wins"')
|
|
expect(text).toContain('"tools"')
|
|
expect(text).not.toContain('"ignored-id"')
|
|
})
|
|
})
|
|
|
|
// Test resumability support
|
|
describe('StreamableHTTPServerTransport with resumability', () => {
|
|
let server: Hono
|
|
let transport: StreamableHTTPTransport
|
|
let sessionId: string
|
|
let mcpServer: McpServer
|
|
const storedEvents = new Map<string, { eventId: string; message: JSONRPCMessage }>()
|
|
|
|
// Simple implementation of EventStore
|
|
const eventStore: EventStore = {
|
|
async storeEvent(streamId: string, message: JSONRPCMessage): Promise<string> {
|
|
const eventId = `${streamId}_${crypto.randomUUID()}`
|
|
storedEvents.set(eventId, { eventId, message })
|
|
return eventId
|
|
},
|
|
|
|
async replayEventsAfter(
|
|
lastEventId: EventId,
|
|
{
|
|
send,
|
|
}: {
|
|
send: (eventId: EventId, message: JSONRPCMessage) => Promise<void>
|
|
}
|
|
): Promise<StreamId> {
|
|
const streamId = lastEventId.split('_')[0]
|
|
// Extract stream ID from the event ID
|
|
// For test simplicity, just return all events with matching streamId that aren't the lastEventId
|
|
for (const [eventId, { message }] of storedEvents.entries()) {
|
|
if (eventId.startsWith(streamId) && eventId !== lastEventId) {
|
|
await send(eventId, message)
|
|
}
|
|
}
|
|
return streamId
|
|
},
|
|
}
|
|
|
|
beforeEach(async () => {
|
|
storedEvents.clear()
|
|
const result = await createTestServer({
|
|
sessionIdGenerator: () => crypto.randomUUID(),
|
|
eventStore,
|
|
})
|
|
|
|
server = result.server
|
|
transport = result.transport
|
|
mcpServer = result.mcpServer
|
|
|
|
// Verify resumability is enabled on the transport
|
|
// TODO: We have marked this as a private property, so we can't access it directly
|
|
// expect(transport['_eventStore']).toBeDefined()
|
|
|
|
// Initialize the server
|
|
const initResponse = await sendPostRequest(server, TEST_MESSAGES.initialize)
|
|
sessionId = initResponse.headers.get('mcp-session-id') as string
|
|
expect(sessionId).toBeDefined()
|
|
})
|
|
|
|
afterEach(async () => {
|
|
await stopTestServer({ transport })
|
|
storedEvents.clear()
|
|
})
|
|
|
|
it('should store and include event IDs in server SSE messages', async () => {
|
|
// Open a standalone SSE stream
|
|
const sseResponse = await server.request('/', {
|
|
method: 'GET',
|
|
headers: {
|
|
Accept: 'text/event-stream',
|
|
'mcp-session-id': sessionId,
|
|
},
|
|
})
|
|
|
|
expect(sseResponse.status).toBe(200)
|
|
expect(sseResponse.headers.get('content-type')).toBe('text/event-stream')
|
|
|
|
// Send a notification that should be stored with an event ID
|
|
const notification: JSONRPCMessage = {
|
|
jsonrpc: '2.0',
|
|
method: 'notifications/message',
|
|
params: { level: 'info', data: 'Test notification with event ID' },
|
|
}
|
|
|
|
// Send the notification via transport
|
|
await transport.send(notification)
|
|
|
|
// Read from the stream and verify we got the notification with an event ID
|
|
const text = await readSSEEvent(sseResponse)
|
|
|
|
// The response should contain an event ID
|
|
expect(text).toContain('id: ')
|
|
expect(text).toContain('"method":"notifications/message"')
|
|
|
|
// Extract the event ID
|
|
const idMatch = text.match(/id: ([^\n]+)/)
|
|
expect(idMatch).toBeTruthy()
|
|
|
|
// Verify the event was stored
|
|
const eventId = idMatch![1]
|
|
expect(storedEvents.has(eventId)).toBe(true)
|
|
const storedEvent = storedEvents.get(eventId)
|
|
expect(eventId.startsWith('_GET_stream')).toBe(true)
|
|
expect(storedEvent?.message).toMatchObject(notification)
|
|
})
|
|
|
|
it('should store and replay MCP server tool notifications', async () => {
|
|
// Establish a standalone SSE stream
|
|
const sseResponse = await server.request('/', {
|
|
method: 'GET',
|
|
headers: {
|
|
Accept: 'text/event-stream',
|
|
'mcp-session-id': sessionId,
|
|
},
|
|
})
|
|
expect(sseResponse.status).toBe(200) // Send a server notification through the MCP server
|
|
await mcpServer.server.sendLoggingMessage({
|
|
level: 'info',
|
|
data: 'First notification from MCP server',
|
|
})
|
|
|
|
// Read the notification from the SSE stream
|
|
const reader = sseResponse.body?.getReader()
|
|
const { value } = await reader!.read()
|
|
const text = new TextDecoder().decode(value)
|
|
|
|
// Verify the notification was sent with an event ID
|
|
expect(text).toContain('id: ')
|
|
expect(text).toContain('First notification from MCP server')
|
|
|
|
// Extract the event ID
|
|
const idMatch = text.match(/id: ([^\n]+)/)
|
|
expect(idMatch).toBeTruthy()
|
|
const firstEventId = idMatch![1]
|
|
|
|
// Send a second notification
|
|
await mcpServer.server.sendLoggingMessage({
|
|
level: 'info',
|
|
data: 'Second notification from MCP server',
|
|
})
|
|
|
|
// Close the first SSE stream to simulate a disconnect
|
|
await reader!.cancel()
|
|
|
|
// Reconnect with the Last-Event-ID to get missed messages
|
|
const reconnectResponse = await server.request('/', {
|
|
method: 'GET',
|
|
headers: {
|
|
Accept: 'text/event-stream',
|
|
'mcp-session-id': sessionId,
|
|
'last-event-id': firstEventId,
|
|
},
|
|
})
|
|
|
|
expect(reconnectResponse.status).toBe(200)
|
|
|
|
// Read the replayed notification
|
|
const reconnectText = await readNSSEEvents(reconnectResponse, 2)
|
|
|
|
// Verify we received the second notification that was sent after our stored eventId
|
|
expect(reconnectText).toContain('Second notification from MCP server')
|
|
expect(reconnectText).toContain('id: ')
|
|
})
|
|
})
|
|
|
|
// Test stateless mode
|
|
describe('StreamableHTTPServerTransport in stateless mode', () => {
|
|
let server: Hono
|
|
let transport: StreamableHTTPTransport
|
|
|
|
beforeEach(async () => {
|
|
const result = await createTestServer({ sessionIdGenerator: undefined })
|
|
server = result.server
|
|
transport = result.transport
|
|
})
|
|
|
|
afterEach(async () => {
|
|
await stopTestServer({ transport })
|
|
})
|
|
|
|
it('should operate without session ID validation', async () => {
|
|
// Initialize the server first
|
|
const initResponse = await sendPostRequest(server, TEST_MESSAGES.initialize)
|
|
|
|
expect(initResponse.status).toBe(200)
|
|
// Should NOT have session ID header in stateless mode
|
|
expect(initResponse.headers.get('mcp-session-id')).toBeNull()
|
|
|
|
// Try request without session ID - should work in stateless mode
|
|
const toolsResponse = await sendPostRequest(server, TEST_MESSAGES.toolsList)
|
|
|
|
expect(toolsResponse.status).toBe(200)
|
|
})
|
|
|
|
it('should handle POST requests with various session IDs in stateless mode', async () => {
|
|
await sendPostRequest(server, TEST_MESSAGES.initialize)
|
|
|
|
// Try with a random session ID - should be accepted
|
|
const response1 = await server.request('/', {
|
|
method: 'POST',
|
|
headers: {
|
|
'Content-Type': 'application/json',
|
|
Accept: 'application/json, text/event-stream',
|
|
'mcp-session-id': 'random-id-1',
|
|
},
|
|
body: JSON.stringify({
|
|
jsonrpc: '2.0',
|
|
method: 'tools/list',
|
|
params: {},
|
|
id: 't1',
|
|
}),
|
|
})
|
|
expect(response1.status).toBe(200)
|
|
|
|
// Try with another random session ID - should also be accepted
|
|
const response2 = await server.request('/', {
|
|
method: 'POST',
|
|
headers: {
|
|
'Content-Type': 'application/json',
|
|
Accept: 'application/json, text/event-stream',
|
|
'mcp-session-id': 'different-id-2',
|
|
},
|
|
body: JSON.stringify({
|
|
jsonrpc: '2.0',
|
|
method: 'tools/list',
|
|
params: {},
|
|
id: 't2',
|
|
}),
|
|
})
|
|
expect(response2.status).toBe(200)
|
|
})
|
|
|
|
it('should reject second SSE stream even in stateless mode', async () => {
|
|
// Despite no session ID requirement, the transport still only allows
|
|
// one standalone SSE stream at a time
|
|
|
|
// Initialize the server first
|
|
await sendPostRequest(server, TEST_MESSAGES.initialize)
|
|
|
|
// Open first SSE stream
|
|
const stream1 = await server.request('/', {
|
|
method: 'GET',
|
|
headers: { Accept: 'text/event-stream' },
|
|
})
|
|
expect(stream1.status).toBe(200)
|
|
|
|
// Open second SSE stream - should still be rejected, stateless mode still only allows one
|
|
const stream2 = await server.request('/', {
|
|
method: 'GET',
|
|
headers: { Accept: 'text/event-stream' },
|
|
})
|
|
expect(stream2.status).toBe(409) // Conflict - only one stream allowed
|
|
})
|
|
})
|