Dax
233 lines
7.2 KiB
TypeScript
233 lines
7.2 KiB
TypeScript
import { createConnection } from "net"
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import { createServer } from "http"
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import * as Log from "@opencode-ai/core/util/log"
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import { OAUTH_CALLBACK_PORT, OAUTH_CALLBACK_PATH, parseRedirectUri } from "./oauth-provider"
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const log = Log.create({ service: "mcp.oauth-callback" })
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// Current callback server configuration (may differ from defaults if custom redirectUri is used)
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let currentPort = OAUTH_CALLBACK_PORT
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let currentPath = OAUTH_CALLBACK_PATH
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const HTML_SUCCESS = `<!DOCTYPE html>
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<html>
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<head>
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<title>OpenCode - Authorization Successful</title>
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<style>
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body { font-family: system-ui, -apple-system, sans-serif; display: flex; justify-content: center; align-items: center; height: 100vh; margin: 0; background: #1a1a2e; color: #eee; }
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.container { text-align: center; padding: 2rem; }
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h1 { color: #4ade80; margin-bottom: 1rem; }
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p { color: #aaa; }
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</style>
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</head>
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<body>
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<div class="container">
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<h1>Authorization Successful</h1>
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<p>You can close this window and return to OpenCode.</p>
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</div>
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<script>setTimeout(() => window.close(), 2000);</script>
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</body>
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</html>`
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const HTML_ERROR = (error: string) => `<!DOCTYPE html>
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<html>
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<head>
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<title>OpenCode - Authorization Failed</title>
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<style>
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body { font-family: system-ui, -apple-system, sans-serif; display: flex; justify-content: center; align-items: center; height: 100vh; margin: 0; background: #1a1a2e; color: #eee; }
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.container { text-align: center; padding: 2rem; }
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h1 { color: #f87171; margin-bottom: 1rem; }
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p { color: #aaa; }
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.error { color: #fca5a5; font-family: monospace; margin-top: 1rem; padding: 1rem; background: rgba(248,113,113,0.1); border-radius: 0.5rem; }
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</style>
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</head>
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<body>
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<div class="container">
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<h1>Authorization Failed</h1>
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<p>An error occurred during authorization.</p>
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<div class="error">${error}</div>
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</div>
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</body>
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</html>`
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interface PendingAuth {
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resolve: (code: string) => void
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reject: (error: Error) => void
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timeout: ReturnType<typeof setTimeout>
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}
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let server: ReturnType<typeof createServer> | undefined
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const pendingAuths = new Map<string, PendingAuth>()
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// Reverse index: mcpName → oauthState, so cancelPending(mcpName) can
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// find the right entry in pendingAuths (which is keyed by oauthState).
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const mcpNameToState = new Map<string, string>()
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const CALLBACK_TIMEOUT_MS = 5 * 60 * 1000 // 5 minutes
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function cleanupStateIndex(oauthState: string) {
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for (const [name, state] of mcpNameToState) {
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if (state === oauthState) {
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mcpNameToState.delete(name)
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break
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}
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}
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}
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function handleRequest(req: import("http").IncomingMessage, res: import("http").ServerResponse) {
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const url = new URL(req.url || "/", `http://localhost:${currentPort}`)
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if (url.pathname !== currentPath) {
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res.writeHead(404)
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res.end("Not found")
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return
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}
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const code = url.searchParams.get("code")
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const state = url.searchParams.get("state")
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const error = url.searchParams.get("error")
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const errorDescription = url.searchParams.get("error_description")
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log.info("received oauth callback", { hasCode: !!code, state, error })
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// Enforce state parameter presence
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if (!state) {
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const errorMsg = "Missing required state parameter - potential CSRF attack"
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log.error("oauth callback missing state parameter", { url: url.toString() })
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res.writeHead(400, { "Content-Type": "text/html" })
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res.end(HTML_ERROR(errorMsg))
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return
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}
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if (error) {
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const errorMsg = errorDescription || error
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if (pendingAuths.has(state)) {
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const pending = pendingAuths.get(state)!
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clearTimeout(pending.timeout)
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pendingAuths.delete(state)
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cleanupStateIndex(state)
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pending.reject(new Error(errorMsg))
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}
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res.writeHead(200, { "Content-Type": "text/html" })
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res.end(HTML_ERROR(errorMsg))
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return
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}
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if (!code) {
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res.writeHead(400, { "Content-Type": "text/html" })
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res.end(HTML_ERROR("No authorization code provided"))
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return
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}
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// Validate state parameter
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if (!pendingAuths.has(state)) {
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const errorMsg = "Invalid or expired state parameter - potential CSRF attack"
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log.error("oauth callback with invalid state", { state, pendingStates: Array.from(pendingAuths.keys()) })
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res.writeHead(400, { "Content-Type": "text/html" })
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res.end(HTML_ERROR(errorMsg))
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return
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}
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const pending = pendingAuths.get(state)!
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clearTimeout(pending.timeout)
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pendingAuths.delete(state)
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cleanupStateIndex(state)
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pending.resolve(code)
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res.writeHead(200, { "Content-Type": "text/html" })
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res.end(HTML_SUCCESS)
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}
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export async function ensureRunning(redirectUri?: string): Promise<void> {
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// Parse the redirect URI to get port and path (uses defaults if not provided)
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const { port, path } = parseRedirectUri(redirectUri)
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// If server is running on a different port/path, stop it first
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if (server && (currentPort !== port || currentPath !== path)) {
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log.info("stopping oauth callback server to reconfigure", { oldPort: currentPort, newPort: port })
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await stop()
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}
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if (server) return
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const running = await isPortInUse(port)
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if (running) {
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log.info("oauth callback server already running on another instance", { port })
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return
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}
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currentPort = port
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currentPath = path
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server = createServer(handleRequest)
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await new Promise<void>((resolve, reject) => {
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server!.listen(currentPort, () => {
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log.info("oauth callback server started", { port: currentPort, path: currentPath })
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resolve()
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})
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server!.on("error", reject)
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})
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}
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export function waitForCallback(oauthState: string, mcpName?: string): Promise<string> {
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if (mcpName) mcpNameToState.set(mcpName, oauthState)
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return new Promise((resolve, reject) => {
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const timeout = setTimeout(() => {
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if (pendingAuths.has(oauthState)) {
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pendingAuths.delete(oauthState)
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if (mcpName) mcpNameToState.delete(mcpName)
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reject(new Error("OAuth callback timeout - authorization took too long"))
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}
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}, CALLBACK_TIMEOUT_MS)
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pendingAuths.set(oauthState, { resolve, reject, timeout })
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})
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}
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export function cancelPending(mcpName: string): void {
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// Look up the oauthState for this mcpName via the reverse index
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const oauthState = mcpNameToState.get(mcpName)
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const key = oauthState ?? mcpName
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const pending = pendingAuths.get(key)
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if (pending) {
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clearTimeout(pending.timeout)
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pendingAuths.delete(key)
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mcpNameToState.delete(mcpName)
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pending.reject(new Error("Authorization cancelled"))
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}
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}
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export async function isPortInUse(port: number = OAUTH_CALLBACK_PORT): Promise<boolean> {
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return new Promise((resolve) => {
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const socket = createConnection(port, "127.0.0.1")
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socket.on("connect", () => {
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socket.destroy()
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resolve(true)
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})
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socket.on("error", () => {
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resolve(false)
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})
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})
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}
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export async function stop(): Promise<void> {
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if (server) {
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await new Promise<void>((resolve) => server!.close(() => resolve()))
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server = undefined
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log.info("oauth callback server stopped")
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}
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for (const [_name, pending] of pendingAuths) {
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clearTimeout(pending.timeout)
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pending.reject(new Error("OAuth callback server stopped"))
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}
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pendingAuths.clear()
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mcpNameToState.clear()
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}
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export function isRunning(): boolean {
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return server !== undefined
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}
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export * as McpOAuthCallback from "./oauth-callback"
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