browserServerBackend.ts•2.46 kB
/**
* Copyright (c) Microsoft Corporation.
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
import { FullConfig } from './config.js';
import { Context } from './context.js';
import { logUnhandledError } from './log.js';
import { Response } from './response.js';
import { SessionLog } from './sessionLog.js';
import { filteredTools } from './tools.js';
import { packageJSON } from './package.js';
import type { BrowserContextFactory } from './browserContextFactory.js';
import type * as mcpServer from './mcp/server.js';
import type { ServerBackend } from './mcp/server.js';
import type { Tool } from './tools/tool.js';
export class BrowserServerBackend implements ServerBackend {
name = 'Playwright';
version = packageJSON.version;
onclose?: () => void;
private _tools: Tool[];
private _context: Context;
private _sessionLog: SessionLog | undefined;
constructor(config: FullConfig, browserContextFactory: BrowserContextFactory) {
this._tools = filteredTools(config);
this._context = new Context(this._tools, config, browserContextFactory);
}
async initialize() {
this._sessionLog = this._context.config.saveSession ? await SessionLog.create(this._context.config) : undefined;
}
tools(): mcpServer.ToolSchema<any>[] {
return this._tools.map(tool => tool.schema);
}
async callTool(schema: mcpServer.ToolSchema<any>, parsedArguments: any) {
const response = new Response(this._context, schema.name, parsedArguments);
const tool = this._tools.find(tool => tool.schema.name === schema.name)!;
await tool.handle(this._context, parsedArguments, response);
if (this._sessionLog)
await this._sessionLog.log(response);
return await response.serialize();
}
serverInitialized(version: mcpServer.ClientVersion | undefined) {
this._context.clientVersion = version;
}
serverClosed() {
this.onclose?.();
void this._context.dispose().catch(logUnhandledError);
}
}