127 lines
4.4 KiB
TypeScript
127 lines
4.4 KiB
TypeScript
import { Tool } from '@langchain/core/tools'
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import { ICommonObject, INode, INodeData, INodeOptionsValue, INodeParams } from '../../../../src/Interface'
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import { getNodeModulesPackagePath } from '../../../../src/utils'
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import { MCPToolkit, validateArgsForLocalFileAccess } from '../core'
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class Supergateway_MCP implements INode {
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label: string
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name: string
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version: number
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description: string
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type: string
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icon: string
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category: string
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baseClasses: string[]
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documentation: string
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credential: INodeParams
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inputs: INodeParams[]
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constructor() {
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this.label = 'Supergateway MCP'
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this.name = 'supergatewayMCP'
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this.version = 1.0
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this.type = 'Supergateway MCP Tool'
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this.icon = 'supermachine-logo.png'
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this.category = 'Tools (MCP)'
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this.description = 'Runs MCP stdio-based servers over SSE (Server-Sent Events) or WebSockets (WS)'
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this.documentation = 'https://github.com/supercorp-ai/supergateway'
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this.inputs = [
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{
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label: 'Arguments',
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name: 'arguments',
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type: 'string',
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rows: 4,
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placeholder: '--sse "https://mcp-server-ab71a6b2-cd55-49d0-adba-562bc85956e3.supermachine.app"',
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description:
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'Arguments to pass to the supergateway server. Refer to the <a href="https://github.com/supercorp-ai/supergateway/blob/main/README.md" target="_blank">documentation</a> for more information.'
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},
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{
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label: 'Available Actions',
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name: 'mcpActions',
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type: 'asyncMultiOptions',
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loadMethod: 'listActions',
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refresh: true
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}
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]
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this.baseClasses = ['Tool']
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}
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//@ts-ignore
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loadMethods = {
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listActions: async (nodeData: INodeData, options: ICommonObject): Promise<INodeOptionsValue[]> => {
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try {
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const toolset = await this.getTools(nodeData, options)
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toolset.sort((a: any, b: any) => a.name.localeCompare(b.name))
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return toolset.map(({ name, ...rest }) => ({
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label: name.toUpperCase(),
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name: name,
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description: rest.description || name
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}))
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} catch (error) {
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return [
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{
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label: 'No Available Actions',
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name: 'error',
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description: 'No available actions, please check the arguments again and refresh'
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}
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]
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}
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}
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}
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async init(nodeData: INodeData, _: string, options: ICommonObject): Promise<any> {
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const tools = await this.getTools(nodeData, options)
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const _mcpActions = nodeData.inputs?.mcpActions
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let mcpActions = []
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if (_mcpActions) {
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try {
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mcpActions = typeof _mcpActions === 'string' ? JSON.parse(_mcpActions) : _mcpActions
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} catch (error) {
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console.error('Error parsing mcp actions:', error)
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}
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}
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return tools.filter((tool: any) => mcpActions.includes(tool.name))
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}
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async getTools(nodeData: INodeData, _: ICommonObject): Promise<Tool[]> {
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const _args = nodeData.inputs?.arguments as string
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const packagePath = getNodeModulesPackagePath('supergateway/dist/index.js')
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const processedArgs = _args
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.trim()
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.split(/\s+/)
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.map((arg) => {
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// Remove surrounding double or single quotes if they exist
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if ((arg.startsWith('"') && arg.endsWith('"')) || (arg.startsWith("'") && arg.endsWith("'"))) {
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return arg.slice(1, -1)
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}
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return arg
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})
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const serverParams = {
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command: 'node',
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args: [packagePath, ...processedArgs]
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}
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if (process.env.CUSTOM_MCP_SECURITY_CHECK === 'true') {
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try {
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validateArgsForLocalFileAccess(processedArgs)
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} catch (error) {
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throw new Error(`Security validation failed: ${error.message}`)
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}
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}
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const toolkit = new MCPToolkit(serverParams, 'stdio')
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await toolkit.initialize()
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const tools = toolkit.tools ?? []
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return tools as Tool[]
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}
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}
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module.exports = { nodeClass: Supergateway_MCP }
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