* Creates a new MCP client and connects it via the configured transport. * @param injectHeaders - Additional HTTP headers merged over static `serverParams.headers` for this connection. Used to pass per-invocation headers (e.g. from getToolCallHeaders) into SSE/HTTP transports.
(injectHeaders: Record<string, string> = {})
| 27 | * @param injectHeaders - Additional HTTP headers merged over static `serverParams.headers` for this connection. Used to pass per-invocation headers (e.g. from {@link getToolCallHeaders}) into SSE/HTTP transports. |
| 28 | */ |
| 29 | async createClient(injectHeaders: Record<string, string> = {}): Promise<Client> { |
| 30 | const client = new Client( |
| 31 | { |
| 32 | name: 'flowise-client', |
| 33 | version: '1.0.0' |
| 34 | }, |
| 35 | { |
| 36 | capabilities: {} |
| 37 | } |
| 38 | ) |
| 39 | |
| 40 | let transport: StdioClientTransport | SSEClientTransport | StreamableHTTPClientTransport |
| 41 | |
| 42 | if (this.transportType === 'stdio') { |
| 43 | // Compatible with overridden PATH configuration |
| 44 | const params = { |
| 45 | ...this.serverParams, |
| 46 | env: { |
| 47 | ...(this.serverParams.env || {}), |
| 48 | PATH: process.env.PATH |
| 49 | } |
| 50 | } |
| 51 | |
| 52 | transport = new StdioClientTransport(params as StdioServerParameters) |
| 53 | await client.connect(transport) |
| 54 | } else { |
| 55 | if (this.serverParams.url === undefined) { |
| 56 | throw new Error('URL is required for SSE transport') |
| 57 | } |
| 58 | |
| 59 | const baseUrl = new URL(this.serverParams.url) |
| 60 | await checkDenyList(this.serverParams.url) |
| 61 | const mergedHeaders = { ...this.serverParams?.headers, ...injectHeaders } |
| 62 | const headers = Object.keys(mergedHeaders).length > 0 ? mergedHeaders : undefined |
| 63 | try { |
| 64 | if (headers) { |
| 65 | transport = new StreamableHTTPClientTransport(baseUrl, { |
| 66 | requestInit: { |
| 67 | headers |
| 68 | } |
| 69 | }) |
| 70 | } else { |
| 71 | transport = new StreamableHTTPClientTransport(baseUrl) |
| 72 | } |
| 73 | await client.connect(transport) |
| 74 | } catch (error) { |
| 75 | console.error('Error connecting to MCP server', error) |
| 76 | if (headers) { |
| 77 | transport = new SSEClientTransport(baseUrl, { |
| 78 | requestInit: { |
| 79 | headers |
| 80 | }, |
| 81 | eventSourceInit: { |
| 82 | fetch: async (url, init) => { |
| 83 | return secureFetch(url.toString(), { |
| 84 | ...(init as any), |
| 85 | headers |
| 86 | }) as any |
no test coverage detected