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- /** External browser fixture; screenshots contain no host or network content. */
- import { mkdirSync, readFileSync, unlinkSync, writeFileSync } from 'node:fs'
- import { createInterface } from 'node:readline'
- mkdirSync('.dsh', { recursive: true })
- const catalog = JSON.parse(readFileSync(new URL('./catalog.json', import.meta.url), 'utf8'))
- const png = 'iVBORw0KGgoAAAANSUhEUgAAAAEAAAABCAIAAACQd1PeAAAACXBIWXMAAAPoAAAD6AG1e1JrAAAADElEQVQImWNgZGIGAAAOAAeCcsnOAAAAAElFTkSuQmCC'
- const lines = createInterface({ input: process.stdin })
- lines.once('close', () => process.exit(0))
- lines.on('line', line => {
- const request = JSON.parse(line)
- if (request.id === undefined) return
- let result
- switch (request.method) {
- case 'server/discover':
- process.stdout.write(JSON.stringify({ jsonrpc: '2.0', id: request.id, error: { code: -32601, message: 'Legacy browser fixture' } }) + '\n')
- return
- case 'initialize':
- writeFileSync('.dsh/browser-fixture.started', 'chrome-devtools-mcp\n', { flag: 'wx' })
- process.once('exit', () => unlinkSync('.dsh/browser-fixture.started'))
- result = { protocolVersion: request.params.protocolVersion, capabilities: { tools: {} }, serverInfo: { name: 'browser-fixture', version: '1' } }
- break
- case 'tools/list':
- result = catalog
- break
- case 'tools/call':
- if (request.params.name !== 'take_screenshot') throw new Error(`Unexpected Chrome DevTools fixture tool: ${request.params.name}`)
- result = { content: [{ type: 'text', text: 'Chromium page' }, { type: 'image', mimeType: 'image/png', data: png }] }
- break
- default:
- throw new Error(`Unexpected Chrome DevTools fixture request: ${request.method}`)
- }
- process.stdout.write(JSON.stringify({ jsonrpc: '2.0', id: request.id, result }) + '\n')
- })
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