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Author | SHA1 | Date | |
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13a2a98718 | ||
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083695600f |
6 changed files with 373 additions and 231 deletions
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@ -1,6 +1,6 @@
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{
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"name": "mcp-remote",
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"version": "0.0.22",
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"version": "0.1.0",
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"description": "Remote proxy for Model Context Protocol, allowing local-only clients to connect to remote servers using oAuth",
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"keywords": [
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"mcp",
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@ -28,11 +28,11 @@
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"check": "prettier --check . && tsc"
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},
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"dependencies": {
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"@modelcontextprotocol/sdk": "^1.9.0",
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"express": "^4.21.2",
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"open": "^10.1.0"
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},
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"devDependencies": {
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"@modelcontextprotocol/sdk": "^1.10.2",
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"@types/express": "^5.0.0",
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"@types/node": "^22.13.10",
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"@types/react": "^19.0.12",
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|
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158
pnpm-lock.yaml
generated
158
pnpm-lock.yaml
generated
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@ -8,9 +8,6 @@ importers:
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|||
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.:
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dependencies:
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version: 1.9.0
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express:
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version: 4.21.2
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@ -18,6 +15,9 @@ importers:
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||||
transitivePeerDependencies:
|
||||
- supports-color
|
||||
|
@ -1752,10 +1727,6 @@ snapshots:
|
|||
dependencies:
|
||||
safer-buffer: 2.1.2
|
||||
|
||||
iconv-lite@0.5.2:
|
||||
dependencies:
|
||||
safer-buffer: 2.1.2
|
||||
|
||||
iconv-lite@0.6.3:
|
||||
dependencies:
|
||||
safer-buffer: 2.1.2
|
||||
|
@ -1818,7 +1789,7 @@ snapshots:
|
|||
dependencies:
|
||||
mime-db: 1.52.0
|
||||
|
||||
mime-types@3.0.0:
|
||||
mime-types@3.0.1:
|
||||
dependencies:
|
||||
mime-db: 1.54.0
|
||||
|
||||
|
@ -1832,8 +1803,6 @@ snapshots:
|
|||
|
||||
ms@2.0.0: {}
|
||||
|
||||
ms@2.1.2: {}
|
||||
|
||||
ms@2.1.3: {}
|
||||
|
||||
mz@2.7.0:
|
||||
|
@ -1960,11 +1929,15 @@ snapshots:
|
|||
'@rollup/rollup-win32-x64-msvc': 4.35.0
|
||||
fsevents: 2.3.3
|
||||
|
||||
router@2.1.0:
|
||||
router@2.2.0:
|
||||
dependencies:
|
||||
debug: 4.4.0
|
||||
depd: 2.0.0
|
||||
is-promise: 4.0.0
|
||||
parseurl: 1.3.3
|
||||
path-to-regexp: 8.2.0
|
||||
transitivePeerDependencies:
|
||||
- supports-color
|
||||
|
||||
run-applescript@7.0.0: {}
|
||||
|
||||
|
@ -1990,16 +1963,15 @@ snapshots:
|
|||
transitivePeerDependencies:
|
||||
- supports-color
|
||||
|
||||
send@1.1.0:
|
||||
send@1.2.0:
|
||||
dependencies:
|
||||
debug: 4.4.0
|
||||
destroy: 1.2.0
|
||||
encodeurl: 2.0.0
|
||||
escape-html: 1.0.3
|
||||
etag: 1.8.1
|
||||
fresh: 0.5.2
|
||||
fresh: 2.0.0
|
||||
http-errors: 2.0.0
|
||||
mime-types: 2.1.35
|
||||
mime-types: 3.0.1
|
||||
ms: 2.1.3
|
||||
on-finished: 2.4.1
|
||||
range-parser: 1.2.1
|
||||
|
@ -2016,12 +1988,12 @@ snapshots:
|
|||
transitivePeerDependencies:
|
||||
- supports-color
|
||||
|
||||
serve-static@2.1.0:
|
||||
serve-static@2.2.0:
|
||||
dependencies:
|
||||
encodeurl: 2.0.0
|
||||
escape-html: 1.0.3
|
||||
parseurl: 1.3.3
|
||||
send: 1.1.0
|
||||
send: 1.2.0
|
||||
transitivePeerDependencies:
|
||||
- supports-color
|
||||
|
||||
|
@ -2162,11 +2134,11 @@ snapshots:
|
|||
media-typer: 0.3.0
|
||||
mime-types: 2.1.35
|
||||
|
||||
type-is@2.0.0:
|
||||
type-is@2.0.1:
|
||||
dependencies:
|
||||
content-type: 1.0.5
|
||||
media-typer: 1.1.0
|
||||
mime-types: 3.0.0
|
||||
mime-types: 3.0.1
|
||||
|
||||
typescript@5.8.2: {}
|
||||
|
||||
|
@ -2204,8 +2176,8 @@ snapshots:
|
|||
|
||||
wrappy@1.0.2: {}
|
||||
|
||||
zod-to-json-schema@3.24.5(zod@3.24.2):
|
||||
zod-to-json-schema@3.24.5(zod@3.24.3):
|
||||
dependencies:
|
||||
zod: 3.24.2
|
||||
zod: 3.24.3
|
||||
|
||||
zod@3.24.2: {}
|
||||
zod@3.24.3: {}
|
||||
|
|
134
src/client.ts
134
src/client.ts
|
@ -11,25 +11,36 @@
|
|||
|
||||
import { EventEmitter } from 'events'
|
||||
import { Client } from '@modelcontextprotocol/sdk/client/index.js'
|
||||
import { SSEClientTransport } from '@modelcontextprotocol/sdk/client/sse.js'
|
||||
import { ListResourcesResultSchema, ListToolsResultSchema } from '@modelcontextprotocol/sdk/types.js'
|
||||
import { UnauthorizedError } from '@modelcontextprotocol/sdk/client/auth.js'
|
||||
import { NodeOAuthClientProvider } from './lib/node-oauth-client-provider'
|
||||
import { parseCommandLineArgs, setupSignalHandlers, log, MCP_REMOTE_VERSION, getServerUrlHash } from './lib/utils'
|
||||
import { coordinateAuth } from './lib/coordination'
|
||||
import {
|
||||
parseCommandLineArgs,
|
||||
setupSignalHandlers,
|
||||
log,
|
||||
MCP_REMOTE_VERSION,
|
||||
getServerUrlHash,
|
||||
connectToRemoteServer,
|
||||
TransportStrategy,
|
||||
} from './lib/utils'
|
||||
import { createLazyAuthCoordinator } from './lib/coordination'
|
||||
|
||||
/**
|
||||
* Main function to run the client
|
||||
*/
|
||||
async function runClient(serverUrl: string, callbackPort: number, headers: Record<string, string>) {
|
||||
async function runClient(
|
||||
serverUrl: string,
|
||||
callbackPort: number,
|
||||
headers: Record<string, string>,
|
||||
transportStrategy: TransportStrategy = 'http-first',
|
||||
) {
|
||||
// Set up event emitter for auth flow
|
||||
const events = new EventEmitter()
|
||||
|
||||
// Get the server URL hash for lockfile operations
|
||||
const serverUrlHash = getServerUrlHash(serverUrl)
|
||||
|
||||
// Coordinate authentication with other instances
|
||||
const { server, waitForAuthCode, skipBrowserAuth } = await coordinateAuth(serverUrlHash, callbackPort, events)
|
||||
// Create a lazy auth coordinator
|
||||
const authCoordinator = createLazyAuthCoordinator(serverUrlHash, callbackPort, events)
|
||||
|
||||
// Create the OAuth client provider
|
||||
const authProvider = new NodeOAuthClientProvider({
|
||||
|
@ -38,14 +49,6 @@ async function runClient(serverUrl: string, callbackPort: number, headers: Recor
|
|||
clientName: 'MCP CLI Client',
|
||||
})
|
||||
|
||||
// If auth was completed by another instance, just log that we'll use the auth from disk
|
||||
if (skipBrowserAuth) {
|
||||
log('Authentication was completed by another instance - will use tokens from disk...')
|
||||
// TODO: remove, the callback is happening before the tokens are exchanged
|
||||
// so we're slightly too early
|
||||
await new Promise((res) => setTimeout(res, 1_000))
|
||||
}
|
||||
|
||||
// Create the client
|
||||
const client = new Client(
|
||||
{
|
||||
|
@ -57,10 +60,33 @@ async function runClient(serverUrl: string, callbackPort: number, headers: Recor
|
|||
},
|
||||
)
|
||||
|
||||
// Create the transport factory
|
||||
const url = new URL(serverUrl)
|
||||
function initTransport() {
|
||||
const transport = new SSEClientTransport(url, { authProvider, requestInit: { headers } })
|
||||
// Keep track of the server instance for cleanup
|
||||
let server: any = null
|
||||
|
||||
// Define an auth initializer function
|
||||
const authInitializer = async () => {
|
||||
const authState = await authCoordinator.initializeAuth()
|
||||
|
||||
// Store server in outer scope for cleanup
|
||||
server = authState.server
|
||||
|
||||
// If auth was completed by another instance, just log that we'll use the auth from disk
|
||||
if (authState.skipBrowserAuth) {
|
||||
log('Authentication was completed by another instance - will use tokens from disk...')
|
||||
// TODO: remove, the callback is happening before the tokens are exchanged
|
||||
// so we're slightly too early
|
||||
await new Promise((res) => setTimeout(res, 1_000))
|
||||
}
|
||||
|
||||
return {
|
||||
waitForAuthCode: authState.waitForAuthCode,
|
||||
skipBrowserAuth: authState.skipBrowserAuth,
|
||||
}
|
||||
}
|
||||
|
||||
try {
|
||||
// Connect to remote server with lazy authentication
|
||||
const transport = await connectToRemoteServer(client, serverUrl, authProvider, headers, authInitializer, transportStrategy)
|
||||
|
||||
// Set up message and error handlers
|
||||
transport.onmessage = (message) => {
|
||||
|
@ -75,63 +101,19 @@ async function runClient(serverUrl: string, callbackPort: number, headers: Recor
|
|||
log('Connection closed.')
|
||||
process.exit(0)
|
||||
}
|
||||
return transport
|
||||
}
|
||||
|
||||
const transport = initTransport()
|
||||
|
||||
// Set up cleanup handler
|
||||
const cleanup = async () => {
|
||||
log('\nClosing connection...')
|
||||
await client.close()
|
||||
// If auth was initialized and server was created, close it
|
||||
if (server) {
|
||||
server.close()
|
||||
}
|
||||
}
|
||||
setupSignalHandlers(cleanup)
|
||||
|
||||
// Try to connect
|
||||
try {
|
||||
log('Connecting to server...')
|
||||
await client.connect(transport)
|
||||
log('Connected successfully!')
|
||||
} catch (error) {
|
||||
if (error instanceof UnauthorizedError || (error instanceof Error && error.message.includes('Unauthorized'))) {
|
||||
log('Authentication required. Waiting for authorization...')
|
||||
|
||||
// Wait for the authorization code from the callback or another instance
|
||||
const code = await waitForAuthCode()
|
||||
|
||||
try {
|
||||
log('Completing authorization...')
|
||||
await transport.finishAuth(code)
|
||||
|
||||
// Reconnect after authorization with a new transport
|
||||
log('Connecting after authorization...')
|
||||
await client.connect(initTransport())
|
||||
|
||||
log('Connected successfully!')
|
||||
|
||||
// Request tools list after auth
|
||||
log('Requesting tools list...')
|
||||
const tools = await client.request({ method: 'tools/list' }, ListToolsResultSchema)
|
||||
log('Tools:', JSON.stringify(tools, null, 2))
|
||||
|
||||
// Request resources list after auth
|
||||
log('Requesting resource list...')
|
||||
const resources = await client.request({ method: 'resources/list' }, ListResourcesResultSchema)
|
||||
log('Resources:', JSON.stringify(resources, null, 2))
|
||||
|
||||
log('Listening for messages. Press Ctrl+C to exit.')
|
||||
} catch (authError) {
|
||||
log('Authorization error:', authError)
|
||||
server.close()
|
||||
process.exit(1)
|
||||
}
|
||||
} else {
|
||||
log('Connection error:', error)
|
||||
server.close()
|
||||
process.exit(1)
|
||||
}
|
||||
}
|
||||
|
||||
try {
|
||||
// Request tools list
|
||||
|
@ -151,13 +133,27 @@ async function runClient(serverUrl: string, callbackPort: number, headers: Recor
|
|||
log('Error requesting resources list:', e)
|
||||
}
|
||||
|
||||
log('Listening for messages. Press Ctrl+C to exit.')
|
||||
// log('Listening for messages. Press Ctrl+C to exit.')
|
||||
log('Exiting OK...')
|
||||
// Only close the server if it was initialized
|
||||
if (server) {
|
||||
server.close()
|
||||
}
|
||||
process.exit(0)
|
||||
} catch (error) {
|
||||
log('Fatal error:', error)
|
||||
// Only close the server if it was initialized
|
||||
if (server) {
|
||||
server.close()
|
||||
}
|
||||
process.exit(1)
|
||||
}
|
||||
}
|
||||
|
||||
// Parse command-line arguments and run the client
|
||||
parseCommandLineArgs(process.argv.slice(2), 3333, 'Usage: npx tsx client.ts <https://server-url> [callback-port]')
|
||||
.then(({ serverUrl, callbackPort, headers }) => {
|
||||
return runClient(serverUrl, callbackPort, headers)
|
||||
.then(({ serverUrl, callbackPort, headers, transportStrategy }) => {
|
||||
return runClient(serverUrl, callbackPort, headers, transportStrategy)
|
||||
})
|
||||
.catch((error) => {
|
||||
console.error('Fatal error:', error)
|
||||
|
|
|
@ -5,6 +5,10 @@ import express from 'express'
|
|||
import { AddressInfo } from 'net'
|
||||
import { log, setupOAuthCallbackServerWithLongPoll } from './utils'
|
||||
|
||||
export type AuthCoordinator = {
|
||||
initializeAuth: () => Promise<{ server: Server; waitForAuthCode: () => Promise<string>; skipBrowserAuth: boolean }>
|
||||
}
|
||||
|
||||
/**
|
||||
* Checks if a process with the given PID is running
|
||||
* @param pid The process ID to check
|
||||
|
@ -88,6 +92,36 @@ export async function waitForAuthentication(port: number): Promise<boolean> {
|
|||
}
|
||||
}
|
||||
|
||||
/**
|
||||
* Creates a lazy auth coordinator that will only initiate auth when needed
|
||||
* @param serverUrlHash The hash of the server URL
|
||||
* @param callbackPort The port to use for the callback server
|
||||
* @param events The event emitter to use for signaling
|
||||
* @returns An AuthCoordinator object with an initializeAuth method
|
||||
*/
|
||||
export function createLazyAuthCoordinator(
|
||||
serverUrlHash: string,
|
||||
callbackPort: number,
|
||||
events: EventEmitter
|
||||
): AuthCoordinator {
|
||||
let authState: { server: Server; waitForAuthCode: () => Promise<string>; skipBrowserAuth: boolean } | null = null
|
||||
|
||||
return {
|
||||
initializeAuth: async () => {
|
||||
// If auth has already been initialized, return the existing state
|
||||
if (authState) {
|
||||
return authState
|
||||
}
|
||||
|
||||
log('Initializing auth coordination on-demand')
|
||||
|
||||
// Initialize auth using the existing coordinateAuth logic
|
||||
authState = await coordinateAuth(serverUrlHash, callbackPort, events)
|
||||
return authState
|
||||
}
|
||||
}
|
||||
}
|
||||
|
||||
/**
|
||||
* Coordinates authentication between multiple instances of the client/proxy
|
||||
* @param serverUrlHash The hash of the server URL
|
||||
|
|
144
src/lib/utils.ts
144
src/lib/utils.ts
|
@ -1,6 +1,15 @@
|
|||
import { OAuthClientProvider, UnauthorizedError } from '@modelcontextprotocol/sdk/client/auth.js'
|
||||
import { Client } from '@modelcontextprotocol/sdk/client/index.js'
|
||||
import { SSEClientTransport } from '@modelcontextprotocol/sdk/client/sse.js'
|
||||
import { StreamableHTTPClientTransport } from '@modelcontextprotocol/sdk/client/streamableHttp.js'
|
||||
import { Transport } from '@modelcontextprotocol/sdk/shared/transport.js'
|
||||
|
||||
// Connection constants
|
||||
export const REASON_AUTH_NEEDED = 'authentication-needed'
|
||||
export const REASON_TRANSPORT_FALLBACK = 'falling-back-to-alternate-transport'
|
||||
|
||||
// Transport strategy types
|
||||
export type TransportStrategy = 'sse-only' | 'http-only' | 'sse-first' | 'http-first'
|
||||
import { OAuthCallbackServerOptions } from './types'
|
||||
import express from 'express'
|
||||
import net from 'net'
|
||||
|
@ -65,21 +74,33 @@ export function mcpProxy({ transportToClient, transportToServer }: { transportTo
|
|||
}
|
||||
|
||||
/**
|
||||
* Creates and connects to a remote SSE server with OAuth authentication
|
||||
* Type for the auth initialization function
|
||||
*/
|
||||
export type AuthInitializer = () => Promise<{
|
||||
waitForAuthCode: () => Promise<string>
|
||||
skipBrowserAuth: boolean
|
||||
}>
|
||||
|
||||
/**
|
||||
* Creates and connects to a remote server with OAuth authentication
|
||||
* @param client The client to connect with
|
||||
* @param serverUrl The URL of the remote server
|
||||
* @param authProvider The OAuth client provider
|
||||
* @param headers Additional headers to send with the request
|
||||
* @param waitForAuthCode Function to wait for the auth code
|
||||
* @param skipBrowserAuth Whether to skip browser auth and use shared auth
|
||||
* @returns The connected SSE client transport
|
||||
* @param authInitializer Function to initialize authentication when needed
|
||||
* @param transportStrategy Strategy for selecting transport type ('sse-only', 'http-only', 'sse-first', 'http-first')
|
||||
* @param recursionReasons Set of reasons for recursive calls (internal use)
|
||||
* @returns The connected transport
|
||||
*/
|
||||
export async function connectToRemoteServer(
|
||||
client: Client | null,
|
||||
serverUrl: string,
|
||||
authProvider: OAuthClientProvider,
|
||||
headers: Record<string, string>,
|
||||
waitForAuthCode: () => Promise<string>,
|
||||
skipBrowserAuth: boolean = false,
|
||||
): Promise<SSEClientTransport> {
|
||||
authInitializer: AuthInitializer,
|
||||
transportStrategy: TransportStrategy = 'http-first',
|
||||
recursionReasons: Set<string> = new Set(),
|
||||
): Promise<Transport> {
|
||||
log(`[${pid}] Connecting to remote server: ${serverUrl}`)
|
||||
const url = new URL(serverUrl)
|
||||
|
||||
|
@ -93,25 +114,88 @@ export async function connectToRemoteServer(
|
|||
...(init?.headers as Record<string, string> | undefined),
|
||||
...headers,
|
||||
...(tokens?.access_token ? { Authorization: `Bearer ${tokens.access_token}` } : {}),
|
||||
Accept: "text/event-stream",
|
||||
Accept: 'text/event-stream',
|
||||
} as Record<string, string>,
|
||||
})
|
||||
);
|
||||
}),
|
||||
)
|
||||
},
|
||||
};
|
||||
}
|
||||
|
||||
const transport = new SSEClientTransport(url, {
|
||||
log(`Using transport strategy: ${transportStrategy}`)
|
||||
// Determine if we should attempt to fallback on error
|
||||
// Choose transport based on user strategy and recursion history
|
||||
const shouldAttemptFallback = transportStrategy === 'http-first' || transportStrategy === 'sse-first'
|
||||
|
||||
// Create transport instance based on the strategy
|
||||
const sseTransport = transportStrategy === 'sse-only' || transportStrategy === 'sse-first'
|
||||
const transport = sseTransport
|
||||
? new SSEClientTransport(url, {
|
||||
authProvider,
|
||||
requestInit: { headers },
|
||||
eventSourceInit,
|
||||
})
|
||||
: new StreamableHTTPClientTransport(url, {
|
||||
authProvider,
|
||||
requestInit: { headers },
|
||||
})
|
||||
|
||||
try {
|
||||
if (client) {
|
||||
await client.connect(transport)
|
||||
} else {
|
||||
await transport.start()
|
||||
log('Connected to remote server')
|
||||
if (!sseTransport) {
|
||||
// Extremely hacky, but we didn't actually send a request when calling transport.start() above, so we don't
|
||||
// know if we're even talking to an HTTP server. But if we forced that now we'd get an error later saying that
|
||||
// the client is already connected. So let's just create a one-off client to make a single request and figure
|
||||
// out if we're actually talking to an HTTP server or not.
|
||||
const testTransport = new StreamableHTTPClientTransport(url, { authProvider, requestInit: { headers } })
|
||||
const testClient = new Client({ name: 'mcp-remote-fallback-test', version: '0.0.0' }, { capabilities: {} })
|
||||
await testClient.connect(testTransport)
|
||||
}
|
||||
}
|
||||
log(`Connected to remote server using ${transport.constructor.name}`)
|
||||
|
||||
return transport
|
||||
} catch (error) {
|
||||
if (error instanceof UnauthorizedError || (error instanceof Error && error.message.includes('Unauthorized'))) {
|
||||
// Check if it's a protocol error and we should attempt fallback
|
||||
if (
|
||||
error instanceof Error &&
|
||||
shouldAttemptFallback &&
|
||||
(sseTransport
|
||||
? error.message.includes('405') || error.message.includes('Method Not Allowed')
|
||||
: error.message.includes('404') || error.message.includes('Not Found'))
|
||||
) {
|
||||
log(`Received error: ${error.message}`)
|
||||
|
||||
// If we've already tried falling back once, throw an error
|
||||
if (recursionReasons.has(REASON_TRANSPORT_FALLBACK)) {
|
||||
const errorMessage = `Already attempted transport fallback. Giving up.`
|
||||
log(errorMessage)
|
||||
throw new Error(errorMessage)
|
||||
}
|
||||
|
||||
log(`Recursively reconnecting for reason: ${REASON_TRANSPORT_FALLBACK}`)
|
||||
|
||||
// Add to recursion reasons set
|
||||
recursionReasons.add(REASON_TRANSPORT_FALLBACK)
|
||||
|
||||
// Recursively call connectToRemoteServer with the updated recursion tracking
|
||||
return connectToRemoteServer(
|
||||
client,
|
||||
serverUrl,
|
||||
authProvider,
|
||||
headers,
|
||||
authInitializer,
|
||||
sseTransport ? 'http-only' : 'sse-only',
|
||||
recursionReasons,
|
||||
)
|
||||
} else if (error instanceof UnauthorizedError || (error instanceof Error && error.message.includes('Unauthorized'))) {
|
||||
log('Authentication required. Initializing auth...')
|
||||
|
||||
// Initialize authentication on-demand
|
||||
const { waitForAuthCode, skipBrowserAuth } = await authInitializer()
|
||||
|
||||
if (skipBrowserAuth) {
|
||||
log('Authentication required but skipping browser auth - using shared auth')
|
||||
} else {
|
||||
|
@ -125,11 +209,18 @@ export async function connectToRemoteServer(
|
|||
log('Completing authorization...')
|
||||
await transport.finishAuth(code)
|
||||
|
||||
// Create a new transport after auth
|
||||
const newTransport = new SSEClientTransport(url, { authProvider, requestInit: { headers } })
|
||||
await newTransport.start()
|
||||
log('Connected to remote server after authentication')
|
||||
return newTransport
|
||||
if (recursionReasons.has(REASON_AUTH_NEEDED)) {
|
||||
const errorMessage = `Already attempted reconnection for reason: ${REASON_AUTH_NEEDED}. Giving up.`
|
||||
log(errorMessage)
|
||||
throw new Error(errorMessage)
|
||||
}
|
||||
|
||||
// Track this reason for recursion
|
||||
recursionReasons.add(REASON_AUTH_NEEDED)
|
||||
log(`Recursively reconnecting for reason: ${REASON_AUTH_NEEDED}`)
|
||||
|
||||
// Recursively call connectToRemoteServer with the updated recursion tracking
|
||||
return connectToRemoteServer(client, serverUrl, authProvider, headers, authInitializer, transportStrategy, recursionReasons)
|
||||
} catch (authError) {
|
||||
log('Authorization error:', authError)
|
||||
throw authError
|
||||
|
@ -301,6 +392,19 @@ export async function parseCommandLineArgs(args: string[], defaultPort: number,
|
|||
const specifiedPort = args[1] ? parseInt(args[1]) : undefined
|
||||
const allowHttp = args.includes('--allow-http')
|
||||
|
||||
// Parse transport strategy
|
||||
let transportStrategy: TransportStrategy = 'http-first' // Default
|
||||
const transportIndex = args.indexOf('--transport')
|
||||
if (transportIndex !== -1 && transportIndex < args.length - 1) {
|
||||
const strategy = args[transportIndex + 1]
|
||||
if (strategy === 'sse-only' || strategy === 'http-only' || strategy === 'sse-first' || strategy === 'http-first') {
|
||||
transportStrategy = strategy as TransportStrategy
|
||||
log(`Using transport strategy: ${transportStrategy}`)
|
||||
} else {
|
||||
log(`Warning: Ignoring invalid transport strategy: ${strategy}. Valid values are: sse-only, http-only, sse-first, http-first`)
|
||||
}
|
||||
}
|
||||
|
||||
if (!serverUrl) {
|
||||
log(usage)
|
||||
process.exit(1)
|
||||
|
@ -343,7 +447,7 @@ export async function parseCommandLineArgs(args: string[], defaultPort: number,
|
|||
})
|
||||
}
|
||||
|
||||
return { serverUrl, callbackPort, headers }
|
||||
return { serverUrl, callbackPort, headers, transportStrategy }
|
||||
}
|
||||
|
||||
/**
|
||||
|
|
62
src/proxy.ts
62
src/proxy.ts
|
@ -11,22 +11,36 @@
|
|||
|
||||
import { EventEmitter } from 'events'
|
||||
import { StdioServerTransport } from '@modelcontextprotocol/sdk/server/stdio.js'
|
||||
import { connectToRemoteServer, log, mcpProxy, parseCommandLineArgs, setupSignalHandlers, getServerUrlHash } from './lib/utils'
|
||||
import {
|
||||
connectToRemoteServer,
|
||||
log,
|
||||
mcpProxy,
|
||||
parseCommandLineArgs,
|
||||
setupSignalHandlers,
|
||||
getServerUrlHash,
|
||||
MCP_REMOTE_VERSION,
|
||||
TransportStrategy,
|
||||
} from './lib/utils'
|
||||
import { NodeOAuthClientProvider } from './lib/node-oauth-client-provider'
|
||||
import { coordinateAuth } from './lib/coordination'
|
||||
import { createLazyAuthCoordinator } from './lib/coordination'
|
||||
|
||||
/**
|
||||
* Main function to run the proxy
|
||||
*/
|
||||
async function runProxy(serverUrl: string, callbackPort: number, headers: Record<string, string>) {
|
||||
async function runProxy(
|
||||
serverUrl: string,
|
||||
callbackPort: number,
|
||||
headers: Record<string, string>,
|
||||
transportStrategy: TransportStrategy = 'http-first',
|
||||
) {
|
||||
// Set up event emitter for auth flow
|
||||
const events = new EventEmitter()
|
||||
|
||||
// Get the server URL hash for lockfile operations
|
||||
const serverUrlHash = getServerUrlHash(serverUrl)
|
||||
|
||||
// Coordinate authentication with other instances
|
||||
const { server, waitForAuthCode, skipBrowserAuth } = await coordinateAuth(serverUrlHash, callbackPort, events)
|
||||
// Create a lazy auth coordinator
|
||||
const authCoordinator = createLazyAuthCoordinator(serverUrlHash, callbackPort, events)
|
||||
|
||||
// Create the OAuth client provider
|
||||
const authProvider = new NodeOAuthClientProvider({
|
||||
|
@ -35,20 +49,36 @@ async function runProxy(serverUrl: string, callbackPort: number, headers: Record
|
|||
clientName: 'MCP CLI Proxy',
|
||||
})
|
||||
|
||||
// Create the STDIO transport for local connections
|
||||
const localTransport = new StdioServerTransport()
|
||||
|
||||
// Keep track of the server instance for cleanup
|
||||
let server: any = null
|
||||
|
||||
// Define an auth initializer function
|
||||
const authInitializer = async () => {
|
||||
const authState = await authCoordinator.initializeAuth()
|
||||
|
||||
// Store server in outer scope for cleanup
|
||||
server = authState.server
|
||||
|
||||
// If auth was completed by another instance, just log that we'll use the auth from disk
|
||||
if (skipBrowserAuth) {
|
||||
if (authState.skipBrowserAuth) {
|
||||
log('Authentication was completed by another instance - will use tokens from disk')
|
||||
// TODO: remove, the callback is happening before the tokens are exchanged
|
||||
// so we're slightly too early
|
||||
await new Promise((res) => setTimeout(res, 1_000))
|
||||
}
|
||||
|
||||
// Create the STDIO transport for local connections
|
||||
const localTransport = new StdioServerTransport()
|
||||
return {
|
||||
waitForAuthCode: authState.waitForAuthCode,
|
||||
skipBrowserAuth: authState.skipBrowserAuth,
|
||||
}
|
||||
}
|
||||
|
||||
try {
|
||||
// Connect to remote server with authentication
|
||||
const remoteTransport = await connectToRemoteServer(serverUrl, authProvider, headers, waitForAuthCode, skipBrowserAuth)
|
||||
// Connect to remote server with lazy authentication
|
||||
const remoteTransport = await connectToRemoteServer(null, serverUrl, authProvider, headers, authInitializer, transportStrategy)
|
||||
|
||||
// Set up bidirectional proxy between local and remote transports
|
||||
mcpProxy({
|
||||
|
@ -59,15 +89,18 @@ async function runProxy(serverUrl: string, callbackPort: number, headers: Record
|
|||
// Start the local STDIO server
|
||||
await localTransport.start()
|
||||
log('Local STDIO server running')
|
||||
log('Proxy established successfully between local STDIO and remote SSE')
|
||||
log(`Proxy established successfully between local STDIO and remote ${remoteTransport.constructor.name}`)
|
||||
log('Press Ctrl+C to exit')
|
||||
|
||||
// Setup cleanup handler
|
||||
const cleanup = async () => {
|
||||
await remoteTransport.close()
|
||||
await localTransport.close()
|
||||
// Only close the server if it was initialized
|
||||
if (server) {
|
||||
server.close()
|
||||
}
|
||||
}
|
||||
setupSignalHandlers(cleanup)
|
||||
} catch (error) {
|
||||
log('Fatal error:', error)
|
||||
|
@ -93,15 +126,18 @@ to the CA certificate file. If using claude_desktop_config.json, this might look
|
|||
}
|
||||
`)
|
||||
}
|
||||
// Only close the server if it was initialized
|
||||
if (server) {
|
||||
server.close()
|
||||
}
|
||||
process.exit(1)
|
||||
}
|
||||
}
|
||||
|
||||
// Parse command-line arguments and run the proxy
|
||||
parseCommandLineArgs(process.argv.slice(2), 3334, 'Usage: npx tsx proxy.ts <https://server-url> [callback-port]')
|
||||
.then(({ serverUrl, callbackPort, headers }) => {
|
||||
return runProxy(serverUrl, callbackPort, headers)
|
||||
.then(({ serverUrl, callbackPort, headers, transportStrategy }) => {
|
||||
return runProxy(serverUrl, callbackPort, headers, transportStrategy)
|
||||
})
|
||||
.catch((error) => {
|
||||
log('Fatal error:', error)
|
||||
|
|
Loading…
Add table
Add a link
Reference in a new issue