import type { ReadResourceRequest } from '@modelcontextprotocol/sdk/types.js';
interface AppResource {
uri: string;
mimeType: string;
getHtml: () => Promise<string>;
}
const MET_EXPLORER_CSP_RESOURCE_DOMAINS = [
'https://images.metmuseum.org',
'data:',
];
export class ReadResourceHandler {
private readonly appResources: AppResource[];
constructor(appResources: AppResource[]) {
this.appResources = appResources;
}
public async handleReadResource(request: ReadResourceRequest) {
const uri = request.params.uri;
const resource = this.appResources.find(candidate => candidate.uri === uri);
if (resource) {
const html = await resource.getHtml();
return {
contents: [{
uri,
mimeType: resource.mimeType,
text: html,
_meta: {
ui: {
csp: {
resourceDomains: MET_EXPLORER_CSP_RESOURCE_DOMAINS,
},
},
},
}],
};
}
return {
content: [{ type: 'text', text: `Resource not found: ${uri}` }],
isError: true,
};
}
}
