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# HTTP 服务器
[English](http-server.md) | 中文
[dsh-host-webserver](../../packages/host/webserver) 是 GUI 宿主 web 形态的 HTTP 载体:单个提供 `ctx.httpServer``node:http` 插件,由具名路由注册表加 index.html 转换挂点组成,兜底是静态 dist 回退。它不属于 agent loop(智能体循环)主干,也不是能力 seam:它不了解任何 harness 概念,每个功能表面(`/api` 桥接、插件 bundle、HMR(热模块替换)事件流)都是由其他插件注册的一条路由([分层说明](../../.agents/notes/implemented/architecture/2026-07-19-gui-layering-and-rpc-protocol.md))。仅限 web(浏览器)形态:Electron 通过 `file://` 加载 dist,并经 IPC 桥接承载 fetch,不经过本服务器。
源码:[`packages/host/webserver/src/index.ts`](../../packages/host/webserver/src/index.ts)
## 路由
```ts type-equiv
/** Route match kind: 'exact' matches the pathname verbatim; 'prefix' p matches p and p/<anything>. */
type WebRouteKind = 'exact' | 'prefix'
```
```ts type-equiv
/** One named route registration. */
interface WebRoute {
kind: WebRouteKind
/** Absolute pathname, no trailing slash. */
path: string
/** Owns the full response lifecycle (may hold the response open, e.g. SSE). */
handler: (req: IncomingMessage, res: ServerResponse) => void | Promise<void>
}
```
匹配顺序固定:先查 exact 表,再取最长匹配前缀,最后落到静态 dist 回退。注册顺序不携带任何面向请求的语义:具名路由在组合上互不相交,启动窗口期内尚未被认领的请求全部由回退应答。回退遵循固定语义:非 GET/HEAD 返回 405,越出 dist 根目录的遍历返回 403,任何未命中都以 HTTP 200 回退到 `index.html`(SPA 路由),未知扩展名按 octet-stream 提供([`static.ts`](../../packages/host/webserver/src/static.ts))。
## 配置
```ts type-equiv
/** Gateway config: listen address plus the static dist anchor (injected by the composing app, never self-resolved). */
interface Config {
/** Listen host; the two supported values are loopback and all-interfaces. */
host: '127.0.0.1' | '0.0.0.0'
/** Listen port; zero requests an OS-assigned port. */
port: number
/** Absolute path of index.html inside the static root (dist location is workspace knowledge of the app). */
distIndex: string
}
```
`host` 只接受 `127.0.0.1`(默认姿态)和 `0.0.0.0`(刻意的网络暴露);没有 TLS、认证或 origin 策略,因此绑定到非回环地址会把服务器暴露给该网络。`distIndex` 是组合应用解析后注入的组装事实。
## 服务
`HttpServerService``ctx.httpServer`)在激活时立即监听;监听失败(EADDRINUSE 等)会从 init 抛出,形成一个 FAILED fiber,由启动的大声失败 sweep 上报。`register(route)` 添加一条具名路由并返回其 disposer;重复的 `(kind, path)` 抛出异常,因为路由模式是组合层契约,冲突即配置错误。`tapIndex(transform)` 添加一个纯的 html 到 html 转换,按注册顺序应用于每个 index 响应(`/` 和每次 SPA 回退);[dsh-client-modules](../../packages/client/modules) 用它注入启动 manifest(元数据清单)。`port` 读取监听端口,`config.port` 为 0 时读到的是操作系统分配的值。
处理过程中抛出异常的请求(畸形的 % 转义撞上 `decodeURIComponent`、客户端在请求体中途断开)会记录为警告并应答 400(响应头已发出时则销毁 socket),绝不导致进程退出。dispose(资源释放)把 `close()` 与 `closeAllConnections()` 配对使用,因为处理器可能像 SSEServer-Sent Events)那样保持响应打开,而这类连接永远不会自行结束;没有强制关闭,拆卸就会挂起。该包(package)从不打印输出:URL 行归 shell 所有。逐包运维细节(含开发模式的 bundle 监视流水线)留在 [README](../../packages/host/webserver/README.md) 中。