playwright_new_session
Create and manage new browser sessions to open windows and optionally navigate to specified URLs using browser automation capabilities.
Instructions
创建新的浏览器会话，打开一个浏览器窗口并可选择性地访问指定网址
Input Schema
TableJSON Schema
| Name | Required | Description | Default |
|---|---|---|---|
| url | No | 需要访问的初始网址，可选参数，不填则只打开浏览器 |
Implementation Reference
- NewSessionToolHandler class implements the core logic for the 'playwright_new_session' tool, launching a new Chromium browser instance, creating a page, managing sessions, and optionally navigating to a URL.
class NewSessionToolHandler(ToolHandler): name = "playwright_new_session" description = "创建新的浏览器会话，打开一个浏览器窗口并可选择性地访问指定网址" inputSchema = [ Property(name="url", typ="string", description="需要访问的初始网址，可选参数，不填则只打开浏览器", required=False) ] async def handle(self, name: str, arguments: dict | None) -> list[types.TextContent | types.ImageContent | types.EmbeddedResource]: logger.info("开始创建新的浏览器会话") try: self._playwright = await async_playwright().start() logger.debug("Playwright 实例已创建") browser = await self._playwright.chromium.launch(headless=False) logger.debug("浏览器已启动") page = await browser.new_page() logger.debug("新页面已创建") session_id = str(uuid.uuid4()) self._sessions[session_id] = {"browser": browser, "page": page} logger.info(f"会话已创建，ID: {session_id}") url = arguments.get("url") if url: if not url.startswith("http://") and not url.startswith("https://"): url = "https://" + url logger.info(f"正在导航到 URL: {url}") await page.goto(url) logger.debug(f"导航完成, 当前URL: {page.url}") return [types.TextContent(type="text", text="succ")] except Exception as e: logger.error(f"创建会话失败: {str(e)}", exc_info=True) return [types.TextContent(type="text", text=f"创建会话失败: {str(e)}")] - Defines the input schema for the tool, with an optional 'url' parameter of type string.
inputSchema = [ Property(name="url", typ="string", description="需要访问的初始网址，可选参数，不填则只打开浏览器", required=False) ] - src/playwright_server/server.py:43-54 (registration)Registers the NewSessionToolHandler instance in tool_handler_list and creates tool_handlers dictionary mapped by name, used by MCP server for list_tools() and call_tool().
tool_handler_list = [ NavigateToolHandler(), # ScreenshotToolHandler(), EvaluateToolHandler(), GetTextContentToolHandler(), GetHtmlContentToolHandler(), NewSessionToolHandler(), ActionToolHandler() ] # 根据每个处理程序的 name 属性创建字典 tool_handlers = {handler.name: handler for handler in tool_handler_list} - src/playwright_server/server.py:11-11 (registration)Imports the NewSessionToolHandler class required for registration.
from playwright_server.tools.handles import NavigateToolHandler, ScreenshotToolHandler, EvaluateToolHandler, GetTextContentToolHandler, GetHtmlContentToolHandler, NewSessionToolHandler - ToolHandler base class method to_tool() converts the handler's name, description, and inputSchema into MCP Tool object for registration in list_tools().
@classmethod def to_tool(cls) -> types.Tool: return types.Tool( name=cls.name, description=cls.description, inputSchema={ "type": "object", "properties": { property.name: { "type": property.typ, "description": property.description } for property in cls.inputSchema }, "required": [property.name for property in cls.inputSchema if property.required] } )