Merge pull request #15 from modelcontextprotocol/ochafik/simple-host-example
Add simple host example
This commit is contained in:
Olivier Chafik
GitHub
commit
123b74090c
18 changed files with 1248 additions and 24 deletions
49
README.md
49
README.md
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@ -16,6 +16,10 @@ This repo provides:
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- [ui-vanilla.tsx](./examples/simple-server/src/ui-vanilla.ts): vanilla App returned by the `create-ui-vanilla`
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- [ui-raw.tsx](./examples/simple-server/src/ui-raw.ts): same as vanilla App but doesn't use the SDK runtime (just its types)
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- [examples/simple-host](./examples/simple-host): bare-bone examples on how to host MCP Apps (both use the [AppBridge](./src/app-bridge.ts) class to talk to a hosted App)
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- [example-host-react.tsx](./examples/simple-host/src/example-host-react.tsx) uses React (esp. [AppRenderer.tsx](./examples/simple-host/src/AppRenderer.tsx))
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- [example-host-vanilla.tsx](./examples/simple-host/src/example-host-vanilla.tsx) doesn't use React
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- [message-transport](./src/message-transport.ts): `PostMessageTransport` class that uses `postMessage` to exchange JSON-RPC messages between windows / iframes
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- [app.ts](./src/app.ts): `App` class used by an App to talk to its host
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@ -26,22 +30,47 @@ This repo provides:
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What this repo does NOT provide:
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- There's no host implementation here (beyond the `AppBridge` just used for communications).
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- There's no _supported_ host implementation in this repo (beyond the [examples/simple-host](./examples/simple-host) example)
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- We have [contributed a tentative implementation](https://github.com/MCP-UI-Org/mcp-ui/pull/147) of hosting / iframing / sandboxing logic to the [MCP-UI](https://github.com/idosal/mcp-ui) repository, and expect OSS clients may use it, while other clients might roll their own hosting logic.
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- A prior iteration of an e2e prototype w/ client, server and hosting parts is available [in this gist](https://gist.github.com/ochafik/a9603ba2d6757d6038ce066eded4c354)
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## Installation
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## Using the SDK
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This repo is in flux and isn't published to npm (when it is, it will use the `@modelcontextprotocol/ext-apps` package). Please install it from git for now:
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### Run examples
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```bash
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npm install git+https://github.com/modelcontextprotocol/ext-apps.git
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Run the examples in this repo end-to-end:
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```
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npm i
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npm start
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open http://localhost:8080/
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```
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## Development Notes
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> [!NOTE]
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> Please bear with us while we add more examples!
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### Build tools in dependencies
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### Using the SDK in your project
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The build tools (`esbuild`, `tsx`, `typescript`) are in `dependencies` rather than `devDependencies`. This is intentional: it allows the `prepare` script to run when the package is installed from git, since npm doesn't install devDependencies for git dependencies.
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This repo is in flux and isn't published to npm yet: when it is, it will use the `@modelcontextprotocol/ext-apps` package.
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Once the package is published to npm with pre-built `dist/`, these can be moved back to `devDependencies`.
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In the meantime you can depend on the SDK library in a Node.js project by installing it w/ its git URL:
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```bash
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npm install -S git+https://github.com/modelcontextprotocol/ext-apps.git
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```
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Your `package.json` will then look like:
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```json
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{
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...
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"dependencies": {
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...
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"@modelcontextprotocol/ext-apps": "git+https://github.com/modelcontextprotocol/ext-apps.git"
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}
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}
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```
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> [!NOTE]
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> The build tools (`esbuild`, `tsx`, `typescript`) are in `dependencies` rather than `devDependencies`. This is intentional: it allows the `prepare` script to run when the package is installed from git, since npm doesn't install devDependencies for git dependencies.
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>
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> Once the package is published to npm with pre-built `dist/`, these can be moved back to `devDependencies`.
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21
examples/simple-host/example-host-react.html
Normal file
21
examples/simple-host/example-host-react.html
Normal file
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@ -0,0 +1,21 @@
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<!DOCTYPE html>
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<html lang="en">
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<head>
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<meta charset="UTF-8">
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<meta name="viewport" content="width=device-width, initial-scale=1.0">
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<style>
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* {
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box-sizing: border-box;
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}
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body {
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margin: 0;
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font-family: system-ui, -apple-system, sans-serif;
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}
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</style>
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<title>Example MCP-UI React Host</title>
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</head>
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<body>
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<div id="root"></div>
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<script src="/src/example-host-react.tsx" type="module"></script>
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</body>
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</html>
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21
examples/simple-host/example-host-vanilla.html
Normal file
21
examples/simple-host/example-host-vanilla.html
Normal file
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@ -0,0 +1,21 @@
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<!DOCTYPE html>
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<html lang="en">
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<head>
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<meta charset="UTF-8">
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<meta name="viewport" content="width=device-width, initial-scale=1.0">
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<style>
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#chat-root {
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display: flex;
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flex-direction: column;
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}
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</style>
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<script src="/src/example-host-vanilla.ts" type="module"></script>
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<title>Example MCP View Host</title>
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</head>
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<body>
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<h1>Example MCP View Host</h1>
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<div id="controls"></div>
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<div id="chat-root"></div>
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</body>
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</html>
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37
examples/simple-host/package.json
Normal file
37
examples/simple-host/package.json
Normal file
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@ -0,0 +1,37 @@
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{
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"homepage": "https://github.com/modelcontextprotocol/ext-apps/tree/main/examples/simple-host",
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"name": "@modelcontextprotocol/ext-apps-host",
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"version": "1.0.0",
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"type": "module",
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"scripts": {
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"start:server": "tsx server.ts",
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"start:mcp-server": "cd ../simple-server && npm install && npm run start",
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"build": "concurrently 'INPUT=example-host-vanilla.html vite build' 'INPUT=example-host-react.html vite build' 'INPUT=sandbox.html vite build'",
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"server": "bun server.ts",
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"start": "NODE_ENV=development npm run build && concurrently 'npm run start:server' 'npm run start:mcp-server'"
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},
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"dependencies": {
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"@modelcontextprotocol/ext-apps": "../..",
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"@modelcontextprotocol/sdk": "^1.22.0",
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"react-dom": "^19.2.0",
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"react": "^19.2.0",
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"zod": "^3.25.0"
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},
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"devDependencies": {
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"@types/express": "^5.0.0",
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"@types/node": "^22.0.0",
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"@types/react-dom": "^19.2.2",
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"@types/react": "^19.2.2",
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"@vitejs/plugin-react": "^4.3.4",
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"concurrently": "^9.2.1",
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"cors": "^2.8.5",
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"esbuild": "~0.19.10",
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"express": "^5.1.0",
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"prettier": "^3.6.2",
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"tsx": "^4.20.6",
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"typescript": "^5.9.3",
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"vite-plugin-singlefile": "^2.3.0",
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"vite": "^6.0.0",
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"vitest": "^3.2.4"
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}
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}
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48
examples/simple-host/sandbox.html
Normal file
48
examples/simple-host/sandbox.html
Normal file
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@ -0,0 +1,48 @@
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<!doctype html>
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<html>
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<head>
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<meta charset="utf-8" />
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<!-- Permissive CSP so nested content is not constrained by host CSP -->
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<meta http-equiv="Content-Security-Policy" content="
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default-src 'self';
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img-src * data: blob: 'unsafe-inline';
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media-src * blob: data:;
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font-src * blob: data:;
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script-src 'self'
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'wasm-unsafe-eval'
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'unsafe-inline'
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'unsafe-eval'
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blob: data: http://localhost:* https://localhost:*;
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style-src * blob: data: 'unsafe-inline';
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connect-src *;
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frame-src * blob: data: http://localhost:* https://localhost:*;
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base-uri 'self';
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" />
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<title>MCP-UI Proxy</title>
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<style>
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html,
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body {
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margin: 0;
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height: 100vh;
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width: 100vw;
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}
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body {
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display: flex;
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flex-direction: column;
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}
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* {
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box-sizing: border-box;
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}
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iframe {
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background-color: transparent;
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border: 0px none transparent;
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padding: 0px;
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overflow: hidden;
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flex-grow: 1;
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}
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</style>
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</head>
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<body>
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<script type="module" src="/src/sandbox.ts"></script>
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</body>
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</html>
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58
examples/simple-host/server.ts
Normal file
58
examples/simple-host/server.ts
Normal file
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@ -0,0 +1,58 @@
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#!/usr/bin/env npx tsx
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/**
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* Simple HTTP server to serve the host and sandbox html files with appropriate
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* Content Security Policy (CSP) headers.
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*/
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import express from "express";
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import cors from "cors";
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import { fileURLToPath } from "url";
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import { dirname, join } from "path";
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const __filename = fileURLToPath(import.meta.url);
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const __dirname = dirname(__filename);
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const PORT = parseInt(process.env.PORT || "8080", 10);
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const DIRECTORY = join(__dirname, "dist");
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const app = express();
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// CORS middleware for all routes
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app.use(cors());
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// Custom middleware for sandbox.html and root
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app.use((req, res, next) => {
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if (req.path === "/sandbox.html" || req.path === "/") {
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// Permissive CSP to allow external resources (images, styles, scripts)
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const csp = [
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"default-src 'self'",
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"img-src * data: blob: 'unsafe-inline'",
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"style-src * blob: data: 'unsafe-inline'",
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"script-src * blob: data: 'unsafe-inline' 'unsafe-eval'",
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"connect-src *",
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"font-src * blob: data:",
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"media-src * blob: data:",
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"frame-src * blob: data:",
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].join("; ");
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res.setHeader("Content-Security-Policy", csp);
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// Disable caching to ensure fresh content on every request
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res.setHeader("Cache-Control", "no-cache, no-store, must-revalidate");
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res.setHeader("Pragma", "no-cache");
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res.setHeader("Expires", "0");
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}
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next();
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});
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// Serve static files from dist directory
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app.use(express.static(DIRECTORY));
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// Redirect root to example-host.html
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app.get("/", (_req, res) => {
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res.redirect("/example-host-react.html");
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});
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app.listen(PORT, () => {
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console.log(`Server running on: http://localhost:${PORT}`);
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console.log("Press Ctrl+C to stop the server\n");
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});
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340
examples/simple-host/src/AppRenderer.tsx
Normal file
340
examples/simple-host/src/AppRenderer.tsx
Normal file
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@ -0,0 +1,340 @@
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import { useEffect, useRef, useState } from "react";
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import { Client } from "@modelcontextprotocol/sdk/client/index.js";
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import {
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type CallToolResult,
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type LoggingMessageNotification,
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McpError,
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ErrorCode,
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} from "@modelcontextprotocol/sdk/types.js";
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import {
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AppBridge,
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PostMessageTransport,
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} from "@modelcontextprotocol/ext-apps/app-bridge";
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import {
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getToolUiResourceUri,
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readToolUiResourceHtml,
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setupSandboxProxyIframe,
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} from "./app-host-utils";
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/**
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* Props for the AppRenderer component.
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*/
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export interface AppRendererProps {
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/** URL to the sandbox proxy HTML that will host the tool UI iframe */
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sandboxProxyUrl: URL;
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/** MCP client connected to the server providing the tool */
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client: Client;
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/** Name of the MCP tool to render UI for */
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toolName: string;
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/** Optional pre-fetched resource URI. If not provided, will be fetched via getToolUiResourceUri() */
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toolResourceUri?: string;
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/** Optional input arguments to pass to the tool UI once it's ready */
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toolInput?: Record<string, unknown>;
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/** Optional result from tool execution to pass to the tool UI once it's ready */
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toolResult?: CallToolResult;
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onopenlink?: AppBridge["onopenlink"];
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onmessage?: AppBridge["onmessage"];
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onloggingmessage?: AppBridge["onloggingmessage"];
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/** Callback invoked when an error occurs during setup or message handling */
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onerror?: (error: Error) => void;
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}
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/**
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* React component that renders an MCP tool's custom UI in a sandboxed iframe.
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*
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* This component manages the complete lifecycle of an MCP-UI tool:
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* 1. Creates a sandboxed iframe with the proxy HTML
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* 2. Establishes MCP communication channel between host and iframe
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* 3. Fetches and loads the tool's UI resource (HTML)
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* 4. Sends tool inputs and results to the UI when ready
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* 5. Handles UI actions (intents, link opening, prompts, notifications)
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* 6. Automatically resizes iframe based on content size changes
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*
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* @example
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* ```tsx
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* <AppRenderer
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* sandboxProxyUrl={new URL('http://localhost:8765/sandbox_proxy.html')}
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* client={mcpClient}
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* toolName="create-chart"
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* toolInput={{ data: [1, 2, 3], type: 'bar' }}
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* onUIAction={async (action) => {
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* if (action.type === 'intent') {
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* // Handle intent request from UI
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* console.log('Intent:', action.payload.intent);
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* }
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* }}
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* onerror={(error) => console.error('UI Error:', error)}
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* />
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* ```
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*
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* **Architecture:**
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* - Host (this component) ↔ Sandbox Proxy (iframe) ↔ Tool UI (nested iframe)
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* - Communication uses MCP protocol over postMessage
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* - Sandbox proxy provides CSP isolation for untrusted tool UIs
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* - Standard MCP initialization flow determines when UI is ready
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*
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* **Lifecycle:**
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* 1. `setupSandboxProxyIframe()` creates iframe and waits for proxy ready
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* 2. Component creates `McpUiProxyServer` instance
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* 3. Registers all handlers (BEFORE connecting to avoid race conditions)
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* 4. Connects proxy to iframe via `MessageTransport`
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* 5. MCP initialization completes → `onClientReady` callback fires
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* 6. Fetches tool UI resource and sends to sandbox proxy
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* 7. Sends tool inputs/results when iframe signals ready
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*
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* @param props - Component props
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* @returns React element containing the sandboxed tool UI iframe
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*/
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export const AppRenderer = (props: AppRendererProps) => {
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const {
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client,
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sandboxProxyUrl,
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toolName,
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toolResourceUri,
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toolInput,
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toolResult,
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onmessage,
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onopenlink,
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onloggingmessage,
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onerror,
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} = props;
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// State
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const [appBridge, setAppBridge] = useState<AppBridge | null>(null);
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const [iframeReady, setIframeReady] = useState(false);
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const [error, setError] = useState<Error | null>(null);
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const containerRef = useRef<HTMLDivElement | null>(null);
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const iframeRef = useRef<HTMLIFrameElement | null>(null);
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// Use refs for callbacks to avoid effect re-runs when they change
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const onmessageRef = useRef(onmessage);
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const onopenlinkRef = useRef(onopenlink);
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const onloggingmessageRef = useRef(onloggingmessage);
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const onerrorRef = useRef(onerror);
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useEffect(() => {
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onmessageRef.current = onmessage;
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onopenlinkRef.current = onopenlink;
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onloggingmessageRef.current = onloggingmessage;
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onerrorRef.current = onerror;
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});
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useEffect(() => {
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let mounted = true;
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const setup = async () => {
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try {
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const { iframe, onReady } =
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await setupSandboxProxyIframe(sandboxProxyUrl);
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if (!mounted) return;
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iframeRef.current = iframe;
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if (containerRef.current) {
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containerRef.current.appendChild(iframe);
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}
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await onReady;
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if (!mounted) return;
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const serverCapabilities = client.getServerCapabilities();
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const appBridge = new AppBridge(
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client,
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{
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name: "Example MCP UI Host",
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version: "1.0.0",
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},
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{
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openLinks: {},
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serverTools: serverCapabilities?.tools,
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serverResources: serverCapabilities?.resources,
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},
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);
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// Step 3: Register ALL handlers BEFORE connecting (critical for avoiding race conditions)
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// Hook into the standard MCP initialization to know when the inner iframe is ready
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appBridge.oninitialized = () => {
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if (!mounted) return;
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console.log("[Host] Inner iframe MCP client initialized");
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setIframeReady(true);
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};
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// Register handlers passed in via props
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appBridge.onmessage = (params, extra) => {
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if (!onmessageRef.current) {
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throw new McpError(ErrorCode.MethodNotFound, "Method not found");
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}
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return onmessageRef.current(params, extra);
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};
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appBridge.onopenlink = (params, extra) => {
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if (!onopenlinkRef.current) {
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throw new McpError(ErrorCode.MethodNotFound, "Method not found");
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}
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return onopenlinkRef.current(params, extra);
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};
|
||||
appBridge.onloggingmessage = (params) => {
|
||||
if (!onloggingmessageRef.current) {
|
||||
throw new McpError(ErrorCode.MethodNotFound, "Method not found");
|
||||
}
|
||||
return onloggingmessageRef.current(params);
|
||||
};
|
||||
|
||||
appBridge.onsizechange = async ({ width, height }) => {
|
||||
if (iframeRef.current) {
|
||||
if (width !== undefined) {
|
||||
iframeRef.current.style.width = `${width}px`;
|
||||
}
|
||||
if (height !== undefined) {
|
||||
iframeRef.current.style.height = `${height}px`;
|
||||
}
|
||||
}
|
||||
};
|
||||
|
||||
// Step 4: NOW connect (triggers MCP initialization handshake)
|
||||
// IMPORTANT: Pass iframe.contentWindow as BOTH target and source to ensure
|
||||
// this proxy only responds to messages from its specific iframe
|
||||
await appBridge.connect(
|
||||
new PostMessageTransport(
|
||||
iframe.contentWindow!,
|
||||
iframe.contentWindow!,
|
||||
),
|
||||
);
|
||||
|
||||
if (!mounted) return;
|
||||
|
||||
// Step 5: Store proxy in state
|
||||
setAppBridge(appBridge);
|
||||
} catch (err) {
|
||||
console.error("[AppRenderer] Error:", err);
|
||||
if (!mounted) return;
|
||||
const error = err instanceof Error ? err : new Error(String(err));
|
||||
setError(error);
|
||||
onerrorRef.current?.(error);
|
||||
}
|
||||
};
|
||||
|
||||
setup();
|
||||
|
||||
return () => {
|
||||
mounted = false;
|
||||
// Cleanup: remove iframe from DOM
|
||||
if (
|
||||
iframeRef.current &&
|
||||
containerRef.current?.contains(iframeRef.current)
|
||||
) {
|
||||
containerRef.current.removeChild(iframeRef.current);
|
||||
}
|
||||
};
|
||||
}, [client, sandboxProxyUrl]);
|
||||
|
||||
// Effect 2: Fetch and send UI resource
|
||||
useEffect(() => {
|
||||
if (!appBridge) return;
|
||||
|
||||
let mounted = true;
|
||||
|
||||
const fetchAndSendResource = async () => {
|
||||
try {
|
||||
// Get the resource URI (use prop if provided, otherwise fetch)
|
||||
let resourceInfo: { uri: string };
|
||||
|
||||
if (toolResourceUri) {
|
||||
// When URI is provided directly, assume it's NOT OpenAI Apps SDK format
|
||||
resourceInfo = {
|
||||
uri: toolResourceUri,
|
||||
};
|
||||
console.log(
|
||||
`[Host] Using provided resource URI: ${resourceInfo.uri}`,
|
||||
);
|
||||
} else {
|
||||
console.log(`[Host] Fetching resource URI for tool: ${toolName}`);
|
||||
const info = await getToolUiResourceUri(client, toolName);
|
||||
if (!info) {
|
||||
throw new Error(
|
||||
`Tool ${toolName} has no UI resource (no ui/resourceUri or openai/outputTemplate in tool._meta)`,
|
||||
);
|
||||
}
|
||||
resourceInfo = info;
|
||||
console.log(`[Host] Got resource URI: ${resourceInfo.uri}`);
|
||||
}
|
||||
|
||||
if (!resourceInfo.uri) {
|
||||
throw new Error(`Tool ${toolName}: URI is undefined or empty`);
|
||||
}
|
||||
|
||||
if (!mounted) return;
|
||||
|
||||
// Read the HTML content
|
||||
console.log(`[Host] Reading resource HTML from: ${resourceInfo.uri}`);
|
||||
const html = await readToolUiResourceHtml(client, {
|
||||
uri: resourceInfo.uri,
|
||||
});
|
||||
|
||||
if (!mounted) return;
|
||||
|
||||
// Send the resource to the sandbox proxy
|
||||
console.log("[Host] Sending sandbox resource ready");
|
||||
await appBridge.sendSandboxResourceReady({ html });
|
||||
} catch (err) {
|
||||
if (!mounted) return;
|
||||
const error = err instanceof Error ? err : new Error(String(err));
|
||||
setError(error);
|
||||
onerrorRef.current?.(error);
|
||||
}
|
||||
};
|
||||
|
||||
fetchAndSendResource();
|
||||
|
||||
return () => {
|
||||
mounted = false;
|
||||
};
|
||||
}, [appBridge, toolName, toolResourceUri, client]);
|
||||
|
||||
// Effect 3: Send tool input when ready
|
||||
useEffect(() => {
|
||||
if (appBridge && iframeReady && toolInput) {
|
||||
console.log("[Host] Sending tool input:", toolInput);
|
||||
appBridge.sendToolInput({ arguments: toolInput });
|
||||
}
|
||||
}, [appBridge, iframeReady, toolInput]);
|
||||
|
||||
// Effect 4: Send tool result when ready
|
||||
useEffect(() => {
|
||||
if (appBridge && iframeReady && toolResult) {
|
||||
console.log("[Host] Sending tool result:", toolResult);
|
||||
appBridge.sendToolResult(toolResult);
|
||||
}
|
||||
}, [appBridge, iframeReady, toolResult]);
|
||||
|
||||
// Render
|
||||
return (
|
||||
<div
|
||||
ref={containerRef}
|
||||
style={{
|
||||
width: "100%",
|
||||
height: "100%",
|
||||
display: "flex",
|
||||
flexDirection: "column",
|
||||
}}
|
||||
>
|
||||
{error && (
|
||||
<div style={{ color: "red", padding: "1rem" }}>
|
||||
Error: {error.message}
|
||||
</div>
|
||||
)}
|
||||
</div>
|
||||
);
|
||||
};
|
||||
114
examples/simple-host/src/app-host-utils.ts
Normal file
114
examples/simple-host/src/app-host-utils.ts
Normal file
|
|
@ -0,0 +1,114 @@
|
|||
import { McpUiSandboxProxyReadyNotificationSchema } from "@modelcontextprotocol/ext-apps";
|
||||
import { Client } from "@modelcontextprotocol/sdk/client/index.js";
|
||||
import { Tool } from "@modelcontextprotocol/sdk/types.js";
|
||||
|
||||
const MCP_UI_RESOURCE_META_KEY = "ui/resourceUri";
|
||||
|
||||
export async function setupSandboxProxyIframe(sandboxProxyUrl: URL): Promise<{
|
||||
iframe: HTMLIFrameElement;
|
||||
onReady: Promise<void>;
|
||||
}> {
|
||||
const iframe = document.createElement("iframe");
|
||||
iframe.style.width = "100%";
|
||||
iframe.style.height = "600px";
|
||||
iframe.style.border = "none";
|
||||
iframe.style.backgroundColor = "transparent";
|
||||
iframe.setAttribute("sandbox", "allow-scripts allow-same-origin allow-forms");
|
||||
|
||||
const onReady = new Promise<void>((resolve, _reject) => {
|
||||
const initialListener = async (event: MessageEvent) => {
|
||||
if (event.source === iframe.contentWindow) {
|
||||
if (
|
||||
event.data &&
|
||||
event.data.method ===
|
||||
McpUiSandboxProxyReadyNotificationSchema.shape.method._def.value
|
||||
) {
|
||||
window.removeEventListener("message", initialListener);
|
||||
resolve();
|
||||
}
|
||||
}
|
||||
};
|
||||
window.addEventListener("message", initialListener);
|
||||
});
|
||||
|
||||
iframe.src = sandboxProxyUrl.href;
|
||||
|
||||
return { iframe, onReady };
|
||||
}
|
||||
|
||||
export type ToolUiResourceInfo = {
|
||||
uri: string;
|
||||
};
|
||||
|
||||
export async function getToolUiResourceUri(
|
||||
client: Client,
|
||||
toolName: string,
|
||||
): Promise<ToolUiResourceInfo | null> {
|
||||
let tool: Tool | undefined;
|
||||
let cursor: string | undefined = undefined;
|
||||
do {
|
||||
const toolsResult = await client.listTools({ cursor });
|
||||
tool = toolsResult.tools.find((t) => t.name === toolName);
|
||||
cursor = toolsResult.nextCursor;
|
||||
} while (!tool && cursor);
|
||||
if (!tool) {
|
||||
throw new Error(`tool ${toolName} not found`);
|
||||
}
|
||||
if (!tool._meta) {
|
||||
return null;
|
||||
}
|
||||
|
||||
let uri: string;
|
||||
if (MCP_UI_RESOURCE_META_KEY in tool._meta) {
|
||||
uri = String(tool._meta[MCP_UI_RESOURCE_META_KEY]);
|
||||
} else {
|
||||
return null;
|
||||
}
|
||||
if (!uri.startsWith("ui://")) {
|
||||
throw new Error(
|
||||
`tool ${toolName} has unsupported output template URI: ${uri}`,
|
||||
);
|
||||
}
|
||||
return { uri };
|
||||
}
|
||||
|
||||
export async function readToolUiResourceHtml(
|
||||
client: Client,
|
||||
opts: {
|
||||
uri: string;
|
||||
},
|
||||
): Promise<string> {
|
||||
const resource = await client.readResource({ uri: opts.uri });
|
||||
|
||||
if (!resource) {
|
||||
throw new Error("UI resource not found: " + opts.uri);
|
||||
}
|
||||
if (resource.contents.length !== 1) {
|
||||
throw new Error(
|
||||
"Unsupported UI resource content length: " + resource.contents.length,
|
||||
);
|
||||
}
|
||||
const content = resource.contents[0];
|
||||
let html: string;
|
||||
const isHtml = (t?: string) => t === "text/html+mcp";
|
||||
|
||||
if (
|
||||
"text" in content &&
|
||||
typeof content.text === "string" &&
|
||||
isHtml(content.mimeType)
|
||||
) {
|
||||
html = content.text;
|
||||
} else if (
|
||||
"blob" in content &&
|
||||
typeof content.blob === "string" &&
|
||||
isHtml(content.mimeType)
|
||||
) {
|
||||
html = atob(content.blob);
|
||||
} else {
|
||||
throw new Error(
|
||||
"Unsupported UI resource content format: " + JSON.stringify(content),
|
||||
);
|
||||
}
|
||||
|
||||
return html;
|
||||
}
|
||||
260
examples/simple-host/src/example-host-react.tsx
Normal file
260
examples/simple-host/src/example-host-react.tsx
Normal file
|
|
@ -0,0 +1,260 @@
|
|||
import { useEffect, useState } from "react";
|
||||
import { createRoot } from "react-dom/client";
|
||||
|
||||
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 { Tool } from "@modelcontextprotocol/sdk/types.js";
|
||||
import { AppRenderer, AppRendererProps } from "../src/AppRenderer";
|
||||
import { AppBridge } from "../../../dist/src/app-bridge";
|
||||
|
||||
const SANDBOX_PROXY_URL = URL.parse("/sandbox.html", location.href)!;
|
||||
|
||||
/**
|
||||
* Example React application demonstrating the AppRenderer component.
|
||||
*
|
||||
* This shows how to:
|
||||
* - Connect to an MCP server
|
||||
* - List available tools
|
||||
* - Render tool UIs using AppRenderer
|
||||
* - Handle UI actions from the tool
|
||||
*/
|
||||
function ExampleApp() {
|
||||
const [client, setClient] = useState<Client | null>(null);
|
||||
const [tools, setTools] = useState<Tool[]>([]);
|
||||
const [activeTools, setActiveTools] = useState<
|
||||
Array<{ id: string; name: string; input: Record<string, unknown> }>
|
||||
>([]);
|
||||
const [error, setError] = useState<string | null>(null);
|
||||
|
||||
// Connect to MCP server on mount
|
||||
useEffect(() => {
|
||||
let mounted = true;
|
||||
|
||||
async function connect() {
|
||||
try {
|
||||
const newClient = new Client({
|
||||
name: "MCP UI React Host",
|
||||
version: "1.0.0",
|
||||
});
|
||||
|
||||
const mcpServerUrl = new URL("http://localhost:3001/mcp");
|
||||
console.log(
|
||||
"[React Host] Attempting SSE connection to",
|
||||
mcpServerUrl.href,
|
||||
);
|
||||
|
||||
try {
|
||||
await newClient.connect(new SSEClientTransport(mcpServerUrl));
|
||||
console.log("[React Host] SSE connection successful");
|
||||
} catch (err) {
|
||||
console.warn(
|
||||
"[React Host] SSE connection failed, falling back to HTTP:",
|
||||
err,
|
||||
);
|
||||
await newClient.connect(
|
||||
new StreamableHTTPClientTransport(mcpServerUrl),
|
||||
);
|
||||
console.log("[React Host] HTTP connection successful");
|
||||
}
|
||||
|
||||
if (!mounted) return;
|
||||
|
||||
// List available tools
|
||||
const toolsResult = await newClient.listTools();
|
||||
|
||||
if (!mounted) return;
|
||||
|
||||
setClient(newClient);
|
||||
setTools(toolsResult.tools);
|
||||
} catch (err) {
|
||||
if (!mounted) return;
|
||||
const errorMsg = err instanceof Error ? err.message : String(err);
|
||||
setError(`Failed to connect to MCP server: ${errorMsg}`);
|
||||
console.error("[React Host] Connection error:", err);
|
||||
}
|
||||
}
|
||||
|
||||
connect();
|
||||
|
||||
return () => {
|
||||
mounted = false;
|
||||
};
|
||||
}, []);
|
||||
|
||||
const handleAddToolUI = (
|
||||
toolName: string,
|
||||
input: Record<string, unknown>,
|
||||
) => {
|
||||
const id = `${toolName}-${Date.now()}`;
|
||||
setActiveTools((prev) => [...prev, { id, name: toolName, input }]);
|
||||
};
|
||||
|
||||
const handleRemoveToolUI = (id: string) => {
|
||||
setActiveTools((prev) => prev.filter((t) => t.id !== id));
|
||||
};
|
||||
|
||||
const handleMessage: AppRendererProps["onmessage"] = async (
|
||||
params,
|
||||
_extra,
|
||||
) => {
|
||||
console.log("[React Host] Message:", params);
|
||||
return {};
|
||||
};
|
||||
|
||||
const handleLoggingMessage: AppRendererProps["onloggingmessage"] = (
|
||||
params,
|
||||
) => {
|
||||
console.log("[React Host] Logging message:", params);
|
||||
};
|
||||
|
||||
const handleOpenLink: AppRendererProps["onopenlink"] = async (
|
||||
params,
|
||||
_extra,
|
||||
) => {
|
||||
console.log("[React Host] Open link request:", params);
|
||||
window.open(params.url, "_blank", "noopener,noreferrer");
|
||||
return { isError: false };
|
||||
};
|
||||
|
||||
const handleError = (toolId: string, err: Error) => {
|
||||
console.error(`[React Host] Error from tool ${toolId}:`, err);
|
||||
setError(`Tool ${toolId}: ${err.message}`);
|
||||
};
|
||||
|
||||
if (error) {
|
||||
return (
|
||||
<div style={{ padding: "20px" }}>
|
||||
<h1>Example MCP-UI React Host</h1>
|
||||
<div
|
||||
style={{
|
||||
color: "red",
|
||||
padding: "10px",
|
||||
border: "1px solid red",
|
||||
borderRadius: "4px",
|
||||
}}
|
||||
>
|
||||
<strong>Error:</strong> {error}
|
||||
</div>
|
||||
<button onClick={() => window.location.reload()}>Retry</button>
|
||||
</div>
|
||||
);
|
||||
}
|
||||
|
||||
if (!client) {
|
||||
return (
|
||||
<div style={{ padding: "20px" }}>
|
||||
<h1>Example MCP-UI React Host</h1>
|
||||
<p>Connecting to MCP server...</p>
|
||||
</div>
|
||||
);
|
||||
}
|
||||
|
||||
return (
|
||||
<div style={{ padding: "20px", fontFamily: "system-ui, sans-serif" }}>
|
||||
<h1>Example MCP-UI React Host</h1>
|
||||
|
||||
<div
|
||||
style={{
|
||||
marginBottom: "20px",
|
||||
padding: "15px",
|
||||
backgroundColor: "#f5f5f5",
|
||||
borderRadius: "4px",
|
||||
}}
|
||||
>
|
||||
<h2 style={{ marginTop: 0 }}>Available Tools</h2>
|
||||
{tools.length === 0 ? (
|
||||
<p>No tools available with UI resources.</p>
|
||||
) : (
|
||||
<div style={{ display: "flex", gap: "10px", flexWrap: "wrap" }}>
|
||||
{tools.map((tool) => (
|
||||
<button
|
||||
key={tool.name}
|
||||
onClick={() => {
|
||||
// Example input - in a real app, you'd have a form for this
|
||||
const input = tool.name.startsWith("pizza-")
|
||||
? { pizzaTopping: "Mushrooms" }
|
||||
: { message: "Hello from React!" };
|
||||
handleAddToolUI(tool.name, input);
|
||||
}}
|
||||
style={{
|
||||
padding: "8px 16px",
|
||||
backgroundColor: "#007bff",
|
||||
color: "white",
|
||||
border: "none",
|
||||
borderRadius: "4px",
|
||||
cursor: "pointer",
|
||||
}}
|
||||
>
|
||||
Add {tool.name}
|
||||
</button>
|
||||
))}
|
||||
</div>
|
||||
)}
|
||||
</div>
|
||||
|
||||
<div style={{ display: "flex", flexDirection: "column", gap: "20px" }}>
|
||||
{activeTools.map((tool) => (
|
||||
<div
|
||||
key={tool.id}
|
||||
style={{
|
||||
padding: "10px",
|
||||
border: "2px solid #ddd",
|
||||
borderRadius: "8px",
|
||||
position: "relative",
|
||||
}}
|
||||
>
|
||||
<div
|
||||
style={{
|
||||
display: "flex",
|
||||
justifyContent: "space-between",
|
||||
alignItems: "center",
|
||||
marginBottom: "10px",
|
||||
}}
|
||||
>
|
||||
<h3 style={{ margin: 0 }}>{tool.name}</h3>
|
||||
<button
|
||||
onClick={() => handleRemoveToolUI(tool.id)}
|
||||
style={{
|
||||
padding: "4px 12px",
|
||||
backgroundColor: "#dc3545",
|
||||
color: "white",
|
||||
border: "none",
|
||||
borderRadius: "4px",
|
||||
cursor: "pointer",
|
||||
}}
|
||||
>
|
||||
Remove
|
||||
</button>
|
||||
</div>
|
||||
|
||||
<AppRenderer
|
||||
sandboxProxyUrl={SANDBOX_PROXY_URL}
|
||||
client={client}
|
||||
toolName={tool.name}
|
||||
toolInput={tool.input}
|
||||
onmessage={handleMessage}
|
||||
onloggingmessage={handleLoggingMessage}
|
||||
onopenlink={handleOpenLink}
|
||||
onerror={(err) => handleError(tool.id, err)}
|
||||
/>
|
||||
</div>
|
||||
))}
|
||||
|
||||
{activeTools.length === 0 && (
|
||||
<p style={{ color: "#666", textAlign: "center", padding: "40px" }}>
|
||||
No tool UIs active. Click a button above to add one.
|
||||
</p>
|
||||
)}
|
||||
</div>
|
||||
</div>
|
||||
);
|
||||
}
|
||||
|
||||
// Mount the React app
|
||||
const root = document.getElementById("root");
|
||||
if (root) {
|
||||
createRoot(root).render(<ExampleApp />);
|
||||
} else {
|
||||
console.error("Root element not found");
|
||||
}
|
||||
159
examples/simple-host/src/example-host-vanilla.ts
Normal file
159
examples/simple-host/src/example-host-vanilla.ts
Normal file
|
|
@ -0,0 +1,159 @@
|
|||
import {
|
||||
AppBridge,
|
||||
PostMessageTransport,
|
||||
} from "@modelcontextprotocol/ext-apps/app-bridge";
|
||||
import {
|
||||
setupSandboxProxyIframe,
|
||||
getToolUiResourceUri,
|
||||
readToolUiResourceHtml,
|
||||
} from "../src/app-host-utils";
|
||||
|
||||
import { Client } from "@modelcontextprotocol/sdk/client/index.js";
|
||||
import { StreamableHTTPClientTransport } from "@modelcontextprotocol/sdk/client/streamableHttp.js";
|
||||
import { SSEClientTransport } from "@modelcontextprotocol/sdk/client/sse.js";
|
||||
import { LoggingMessageNotificationSchema } from "@modelcontextprotocol/sdk/types.js";
|
||||
import {
|
||||
McpUiOpenLinkRequestSchema,
|
||||
McpUiMessageRequestSchema,
|
||||
McpUiSizeChangeNotificationSchema,
|
||||
} from "@modelcontextprotocol/ext-apps";
|
||||
|
||||
const SANDBOX_PROXY_URL = URL.parse("/sandbox.html", location.href)!;
|
||||
|
||||
window.addEventListener("load", async () => {
|
||||
const client = new Client({
|
||||
name: "MCP UI Proxy Server",
|
||||
version: "1.0.0",
|
||||
});
|
||||
const mcpServerUrl = new URL("http://localhost:3001/mcp");
|
||||
console.log("[Client] Attempting SSE connection to", mcpServerUrl.href);
|
||||
try {
|
||||
await client.connect(new SSEClientTransport(mcpServerUrl));
|
||||
console.log("[Client] SSE connection successful");
|
||||
} catch (error) {
|
||||
console.warn(
|
||||
"[Client] SSE connection failed, falling back to HTTP:",
|
||||
error,
|
||||
);
|
||||
await client.connect(new StreamableHTTPClientTransport(mcpServerUrl));
|
||||
console.log("[Client] HTTP connection successful");
|
||||
}
|
||||
|
||||
const tools = Object.fromEntries(
|
||||
(await client.listTools()).tools.map((t) => [t.name, t]),
|
||||
);
|
||||
|
||||
const controlsDiv = document.getElementById("controls") as HTMLDivElement;
|
||||
const chatRootDiv = document.getElementById("chat-root") as HTMLDivElement;
|
||||
|
||||
/**
|
||||
* Creates a tool UI instance for the given tool name.
|
||||
* This demonstrates the new simplified API where the host manages the full proxy lifecycle.
|
||||
*/
|
||||
async function createToolUI(
|
||||
toolName: string,
|
||||
toolInput: Record<string, unknown>,
|
||||
) {
|
||||
try {
|
||||
// Step 1: Create iframe and wait for sandbox proxy ready
|
||||
const { iframe, onReady } =
|
||||
await setupSandboxProxyIframe(SANDBOX_PROXY_URL);
|
||||
|
||||
chatRootDiv.appendChild(iframe);
|
||||
|
||||
// Wait for sandbox proxy to be ready
|
||||
await onReady;
|
||||
|
||||
// Step 2: Create proxy server instance
|
||||
const serverCapabilities = client.getServerCapabilities();
|
||||
const appBridge = new AppBridge(
|
||||
client,
|
||||
{
|
||||
name: "Example MCP UI Host",
|
||||
version: "1.0.0",
|
||||
},
|
||||
{
|
||||
openLinks: {},
|
||||
serverTools: serverCapabilities?.tools,
|
||||
serverResources: serverCapabilities?.resources,
|
||||
},
|
||||
);
|
||||
|
||||
// Step 3: Register handlers BEFORE connecting
|
||||
appBridge.oninitialized = () => {
|
||||
console.log("[Example] Inner iframe MCP client initialized");
|
||||
|
||||
// Send tool input once iframe is ready
|
||||
appBridge.sendToolInput({ arguments: toolInput });
|
||||
};
|
||||
|
||||
appBridge.onopenlink = async ({ url }) => {
|
||||
console.log("[Example] Open link requested:", url);
|
||||
window.open(url, "_blank", "noopener,noreferrer");
|
||||
return { isError: false };
|
||||
};
|
||||
|
||||
appBridge.onmessage = async (params) => {
|
||||
console.log("[Example] Message requested:", params);
|
||||
return { isError: false };
|
||||
};
|
||||
|
||||
// Handle size changes by resizing the iframe
|
||||
appBridge.onsizechange = ({ width, height }) => {
|
||||
if (width !== undefined) {
|
||||
iframe.style.width = `${width}px`;
|
||||
}
|
||||
if (height !== undefined) {
|
||||
iframe.style.height = `${height}px`;
|
||||
}
|
||||
};
|
||||
|
||||
appBridge.onloggingmessage = async (params) => {
|
||||
console.log("[Tool UI Log]", params);
|
||||
};
|
||||
|
||||
// Step 4: Connect proxy to iframe (triggers MCP initialization)
|
||||
// Pass iframe.contentWindow as both target and source for proper message filtering
|
||||
await appBridge.connect(
|
||||
new PostMessageTransport(iframe.contentWindow!, iframe.contentWindow!),
|
||||
);
|
||||
|
||||
// Step 5: Fetch and send UI resource
|
||||
const resourceInfo = await getToolUiResourceUri(client, toolName);
|
||||
if (!resourceInfo) {
|
||||
throw new Error(`Tool ${toolName} has no UI resource`);
|
||||
}
|
||||
|
||||
const html = await readToolUiResourceHtml(client, {
|
||||
uri: resourceInfo.uri,
|
||||
});
|
||||
await appBridge.sendSandboxResourceReady({ html });
|
||||
|
||||
console.log("[Example] Tool UI setup complete for:", toolName);
|
||||
} catch (error) {
|
||||
console.error("[Example] Error setting up tool UI:", error);
|
||||
}
|
||||
}
|
||||
|
||||
// Create buttons for available tools
|
||||
if ([...Object.keys(tools)].some((n) => n.startsWith("pizza-"))) {
|
||||
for (const t of Object.values(tools)) {
|
||||
if (t.name.startsWith("pizza-")) {
|
||||
controlsDiv.appendChild(
|
||||
Object.assign(document.createElement("button"), {
|
||||
innerText: t.name,
|
||||
onclick: () => createToolUI(t.name, { pizzaTopping: "Mushrooms" }),
|
||||
}),
|
||||
);
|
||||
}
|
||||
}
|
||||
} else {
|
||||
controlsDiv.appendChild(
|
||||
Object.assign(document.createElement("button"), {
|
||||
innerText: "Add MCP UI View",
|
||||
onclick: () =>
|
||||
createToolUI("create-ui-vanilla", { message: "Hello from Host!" }),
|
||||
}),
|
||||
);
|
||||
}
|
||||
});
|
||||
41
examples/simple-host/src/sandbox.ts
Normal file
41
examples/simple-host/src/sandbox.ts
Normal file
|
|
@ -0,0 +1,41 @@
|
|||
// Double-iframe raw HTML mode (HTML sent via postMessage)
|
||||
const inner = document.createElement("iframe");
|
||||
inner.style = "width:100%; height:100%; border:none;";
|
||||
// sandbox will be set from postMessage payload; default minimal before html arrives
|
||||
inner.setAttribute("sandbox", "allow-scripts allow-same-origin allow-forms");
|
||||
document.body.appendChild(inner);
|
||||
|
||||
// Wait for HTML content from parent
|
||||
window.addEventListener("message", async (event) => {
|
||||
if (event.source === window.parent) {
|
||||
if (
|
||||
event.data &&
|
||||
event.data.method === "ui/notifications/sandbox-resource-ready"
|
||||
) {
|
||||
const { html, sandbox } = event.data.params;
|
||||
if (typeof sandbox === "string") {
|
||||
inner.setAttribute("sandbox", sandbox);
|
||||
}
|
||||
if (typeof html === "string") {
|
||||
inner.srcdoc = html;
|
||||
}
|
||||
} else {
|
||||
if (inner && inner.contentWindow) {
|
||||
inner.contentWindow.postMessage(event.data, "*");
|
||||
}
|
||||
}
|
||||
} else if (event.source === inner.contentWindow) {
|
||||
// Relay messages from inner to parent
|
||||
window.parent.postMessage(event.data, "*");
|
||||
}
|
||||
});
|
||||
|
||||
// Notify parent that proxy is ready to receive HTML (distinct event)
|
||||
window.parent.postMessage(
|
||||
{
|
||||
jsonrpc: "2.0",
|
||||
method: "ui/notifications/sandbox-proxy-ready",
|
||||
params: {},
|
||||
},
|
||||
"*",
|
||||
);
|
||||
25
examples/simple-host/tsconfig.json
Normal file
25
examples/simple-host/tsconfig.json
Normal file
|
|
@ -0,0 +1,25 @@
|
|||
{
|
||||
"compilerOptions": {
|
||||
"target": "ES2020",
|
||||
"module": "ESNext",
|
||||
"lib": ["ES2021", "DOM"],
|
||||
"jsx": "react-jsx",
|
||||
"declaration": true,
|
||||
"emitDeclarationOnly": true,
|
||||
"outDir": "./dist",
|
||||
"rootDir": "./",
|
||||
"moduleResolution": "bundler",
|
||||
"esModuleInterop": true,
|
||||
"forceConsistentCasingInFileNames": true,
|
||||
"strict": true,
|
||||
"skipLibCheck": true,
|
||||
"resolveJsonModule": true
|
||||
},
|
||||
"include": [
|
||||
"examples/**/*.ts",
|
||||
"examples/**/*.tsx",
|
||||
"src/**/*.ts",
|
||||
"src/**/*.tsx"
|
||||
],
|
||||
"exclude": ["node_modules", "dist"]
|
||||
}
|
||||
24
examples/simple-host/vite.config.ts
Normal file
24
examples/simple-host/vite.config.ts
Normal file
|
|
@ -0,0 +1,24 @@
|
|||
import { defineConfig } from "vite";
|
||||
import react from "@vitejs/plugin-react";
|
||||
import { viteSingleFile } from "vite-plugin-singlefile";
|
||||
|
||||
const INPUT = process.env.INPUT;
|
||||
if (!INPUT) {
|
||||
throw new Error("INPUT environment variable is not set");
|
||||
}
|
||||
|
||||
const isDevelopment = process.env.NODE_ENV === "development";
|
||||
|
||||
export default defineConfig({
|
||||
plugins: [react(), viteSingleFile()],
|
||||
build: {
|
||||
sourcemap: isDevelopment ? "inline" : undefined,
|
||||
cssMinify: !isDevelopment,
|
||||
minify: !isDevelopment,
|
||||
rollupOptions: {
|
||||
input: INPUT,
|
||||
},
|
||||
outDir: `dist`,
|
||||
emptyOutDir: false,
|
||||
},
|
||||
});
|
||||
|
|
@ -4,9 +4,9 @@
|
|||
"private": true,
|
||||
"type": "module",
|
||||
"scripts": {
|
||||
"build:uis": "rm -rf dist && concurrently 'UI=ui-raw.html vite build' 'UI=ui-vanilla.html vite build' 'UI=ui-react.html vite build'",
|
||||
"build": "concurrently 'INPUT=ui-raw.html vite build' 'INPUT=ui-vanilla.html vite build' 'INPUT=ui-react.html vite build'",
|
||||
"server": "bun server.ts",
|
||||
"start": "npm run build:uis && npm run server"
|
||||
"start": "npm run build && npm run server"
|
||||
},
|
||||
"dependencies": {
|
||||
"@modelcontextprotocol/ext-apps": "../..",
|
||||
|
|
|
|||
|
|
@ -1,16 +1,23 @@
|
|||
import { defineConfig } from "vite";
|
||||
import react from "@vitejs/plugin-react";
|
||||
import { viteSingleFile } from "vite-plugin-singlefile";
|
||||
import { resolve } from "path";
|
||||
|
||||
// Get the entry from environment variable, default to ui-react
|
||||
const uiPath = process.env.UI;
|
||||
const INPUT = process.env.INPUT;
|
||||
if (!INPUT) {
|
||||
throw new Error("INPUT environment variable is not set");
|
||||
}
|
||||
|
||||
const isDevelopment = process.env.NODE_ENV === "development";
|
||||
|
||||
export default defineConfig({
|
||||
plugins: [react(), viteSingleFile()],
|
||||
build: {
|
||||
sourcemap: isDevelopment ? "inline" : undefined,
|
||||
cssMinify: !isDevelopment,
|
||||
minify: !isDevelopment,
|
||||
|
||||
rollupOptions: {
|
||||
input: uiPath,
|
||||
input: INPUT,
|
||||
},
|
||||
outDir: `dist`,
|
||||
emptyOutDir: false,
|
||||
|
|
|
|||
|
|
@ -1,7 +1,7 @@
|
|||
{
|
||||
"homepage": "https://gist.github.com/a9603ba2d6757d6038ce066eded4c354",
|
||||
"name": "@modelcontextprotocol/ext-apps",
|
||||
"version": "1.0.0",
|
||||
"version": "0.0.1",
|
||||
"description": "Hey",
|
||||
"type": "module",
|
||||
"main": "./dist/src/app.js",
|
||||
|
|
@ -23,11 +23,7 @@
|
|||
"dist"
|
||||
],
|
||||
"scripts": {
|
||||
"start:example-server0": "bun examples/example-server.ts",
|
||||
"start:example-server": "cd ../openai-apps-sdk-examples && concurrently \"npm run serve\" \"cd pizzaz_server_node && PORT=3001 npm start\"",
|
||||
"start:sandbox-proxy": "python3 sandbox_proxy.py",
|
||||
"start": "npm run build && npm run start:example-server",
|
||||
"start:dev": "NODE_ENV=development npm start",
|
||||
"start": "cd examples/simple-host && npm i && npm start",
|
||||
"build": "bun build.bun.ts",
|
||||
"prepare": "npm run build",
|
||||
"prettier:base-cmd": "prettier -u --ignore-path ./.gitignore --ignore-path ./.prettierignore",
|
||||
|
|
|
|||
|
|
@ -12,6 +12,8 @@ import {
|
|||
ListResourcesResultSchema,
|
||||
ListResourceTemplatesRequestSchema,
|
||||
ListResourceTemplatesResultSchema,
|
||||
LoggingMessageNotification,
|
||||
LoggingMessageNotificationSchema,
|
||||
Notification,
|
||||
PingRequest,
|
||||
PingRequestSchema,
|
||||
|
|
@ -40,6 +42,12 @@ import {
|
|||
McpUiInitializeRequest,
|
||||
McpUiInitializeRequestSchema,
|
||||
McpUiInitializeResult,
|
||||
McpUiMessageRequest,
|
||||
McpUiMessageRequestSchema,
|
||||
McpUiMessageResult,
|
||||
McpUiOpenLinkRequest,
|
||||
McpUiOpenLinkRequestSchema,
|
||||
McpUiOpenLinkResult,
|
||||
McpUiResourceTeardownRequest,
|
||||
McpUiResourceTeardownResultSchema,
|
||||
McpUiSandboxProxyReadyNotification,
|
||||
|
|
@ -101,6 +109,42 @@ export class AppBridge extends Protocol<Request, Notification, Result> {
|
|||
callback(n.params),
|
||||
);
|
||||
}
|
||||
set onmessage(
|
||||
callback: (
|
||||
params: McpUiMessageRequest["params"],
|
||||
extra: RequestExtra,
|
||||
) => Promise<McpUiMessageResult>,
|
||||
) {
|
||||
this.setRequestHandler(
|
||||
McpUiMessageRequestSchema,
|
||||
async (request, extra) => {
|
||||
return callback(request.params, extra);
|
||||
},
|
||||
);
|
||||
}
|
||||
set onopenlink(
|
||||
callback: (
|
||||
params: McpUiOpenLinkRequest["params"],
|
||||
extra: RequestExtra,
|
||||
) => Promise<McpUiOpenLinkResult>,
|
||||
) {
|
||||
this.setRequestHandler(
|
||||
McpUiOpenLinkRequestSchema,
|
||||
async (request, extra) => {
|
||||
return callback(request.params, extra);
|
||||
},
|
||||
);
|
||||
}
|
||||
set onloggingmessage(
|
||||
callback: (params: LoggingMessageNotification["params"]) => void,
|
||||
) {
|
||||
this.setNotificationHandler(
|
||||
LoggingMessageNotificationSchema,
|
||||
async (notification) => {
|
||||
callback(notification.params);
|
||||
},
|
||||
);
|
||||
}
|
||||
|
||||
assertCapabilityForMethod(method: Request["method"]): void {
|
||||
// TODO
|
||||
|
|
|
|||
|
|
@ -20,7 +20,7 @@ export const McpUiOpenLinkRequestSchema = RequestSchema.extend({
|
|||
export type McpUiOpenLinkRequest = z.infer<typeof McpUiOpenLinkRequestSchema>;
|
||||
|
||||
export const McpUiOpenLinkResultSchema = z.object({
|
||||
isError: z.boolean(),
|
||||
isError: z.boolean().optional(),
|
||||
});
|
||||
export type McpUiOpenLinkResult = z.infer<typeof McpUiOpenLinkResultSchema>;
|
||||
|
||||
|
|
@ -36,7 +36,7 @@ export type McpUiMessageRequest = z.infer<typeof McpUiMessageRequestSchema>;
|
|||
export const McpUiMessageResultSchema = z.object({
|
||||
// Note: we don't return the result from follow up messages as they might leak info from the chat.
|
||||
// We do tell the caller if it errored, though.
|
||||
isError: z.boolean(),
|
||||
isError: z.boolean().optional(),
|
||||
});
|
||||
export type McpUiMessageResult = z.infer<typeof McpUiMessageResultSchema>;
|
||||
|
||||
|
|
|
|||
Loading…
Reference in a new issue