记录技术和生活 Zola 2026-10-14T00:04:00+08:00 https://blog.laofu.online/tags/mcp/atom.xml 2026-10-14T00:04:00+08:00 2026-10-14T00:04:00+08:00 bigfish https://blog.laofu.online/blog/20261014-0004-mcpshi-shen-me/

<p>很多 MCP 文章讲的是“Host、Client、Server”三个概念，但真正接入一个 MCP Server 时，代码要处理的事情远不止发一条 JSON-RPC：配置如何解析？本地进程如何启动？远程 HTTP 会话如何保存？超时后能不能安全退出？工具列表变化后是否重新发现？</p> <p>这篇文章不再从 MCP 规范泛讲，而是直接阅读 <code>rpi-mcp-adapter</code> 的代码，回答一个具体问题：<strong>rpi 是如何把外部 MCP Server 接进自己的工具循环的？</strong></p> <p>本文对应 <code>rpi-packages</code> 中的 <code>rpi-mcp-adapter</code> <strong>0.2.1</strong>，源码范围主要是：</p> <pre class="giallo z-l-code z-d-code" ><code data-lang="plain"><span class="giallo-l"><span>packages/rpi-mcp-adapter/</span></span> <span class="giallo-l"><span>├── src/lib.rs 插件入口和三个宿主工具</span></span> <span class="giallo-l"><span>├── src/config.rs mcpServers 配置解析</span></span> <span class="giallo-l"><span>├── src/connection.rs MCP 初始化与 tools 请求构造</span></span> <span class="giallo-l"><span>├── src/runtime.rs 连接缓存、发现、调用和关闭</span></span> <span class="giallo-l"><span>├── src/transport.rs stdio 子进程传输</span></span> <span class="giallo-l"><span>└── src/http.rs Streamable HTTP 传输</span></span></code></pre> <p>源码仓库：<a rel="noopener noreferrer external" target="_blank" href="https://github.com/pi-rust/rpi-package/tree/master/packages/rpi-mcp-adapter">https://github.com/pi-rust/rpi-package/tree/master/packages/rpi-mcp-adapter</a></p>