53 lines
2.2 KiB
TypeScript
53 lines
2.2 KiB
TypeScript
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/**
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* 客户端静态资源托管（任务 A1.5）。
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*
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* 构建后的客户端（client/app/dist）由平台服务托管，这样一个端口就能跑起完整平台——
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* 桌面端与浏览器都指向同一个服务地址。未构建时返回 false，由调用方按 404 处理。
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*/
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import { existsSync } from 'node:fs';
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import { readFile } from 'node:fs/promises';
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import type { ServerResponse } from 'node:http';
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import { extname, join, normalize, resolve, sep } from 'node:path';
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import { fileURLToPath } from 'node:url';
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const MIME_TYPES: Record<string, string> = {
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'.html': 'text/html; charset=utf-8',
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'.js': 'text/javascript; charset=utf-8',
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'.css': 'text/css; charset=utf-8',
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'.json': 'application/json; charset=utf-8',
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'.svg': 'image/svg+xml',
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'.png': 'image/png',
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'.jpg': 'image/jpeg',
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'.woff2': 'font/woff2',
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};
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/** 默认目录：仓库内 client/app/dist；可用 APS_CLIENT_DIST 覆盖 */
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export function clientDistDir(): string {
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const override = process.env.APS_CLIENT_DIST;
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if (override && override.trim() !== '') return resolve(override);
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// server/dist/entry/static.js → 仓库根
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return fileURLToPath(new URL('../../../client/app/dist', import.meta.url));
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}
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export function createStaticHandler(root = clientDistDir()): (urlPath: string, res: ServerResponse) => Promise<boolean> {
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const rootDir = resolve(root);
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const indexFile = join(rootDir, 'index.html');
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return async function serveStatic(urlPath: string, res: ServerResponse): Promise<boolean> {
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if (!existsSync(indexFile)) return false;
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const relativePath = normalize(decodeURIComponent(urlPath)).replace(/^[/\\]+/, '');
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const candidate = resolve(rootDir, relativePath);
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const insideRoot = candidate === rootDir || candidate.startsWith(rootDir + sep);
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if (!insideRoot) return false; // 目录穿越
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const file = relativePath === '' || !existsSync(candidate) || !extname(candidate) ? indexFile : candidate;
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const body = await readFile(file);
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res.writeHead(200, {
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'content-type': MIME_TYPES[extname(file)] ?? 'application/octet-stream',
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'cache-control': file === indexFile ? 'no-store' : 'public, max-age=3600',
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});
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res.end(body);
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return true;
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};
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}
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