JLNTV_IPD/web-font
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zixu 2024-08-19 18:19:09 +08:00
parent a1b5502891
commit 2477caf183
1 changed files with 24 additions and 40 deletions
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64
backend/app.ts
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@ -3,7 +3,9 @@ import { mimeTypes } from "./server/mime_type";
import type { cMiddleware } from "./server/req_res";
import { SimpleHttpServer } from "./server/server";
import { path_join, readFile, stat } from "./interface";
import "./server/tjs";
if (global.tjs) {
import("./server/tjs");
}
const ROOT_DIR = "dist"; // 静态文件目录
const logMiddleware: cMiddleware = async (req, res, next) => {
@ -14,28 +16,7 @@ const logMiddleware: cMiddleware = async (req, res, next) => {
return r;
};
const reqs: Promise<unknown>[] = [];
const limitMiddleware: cMiddleware = async (req, res, next) => {
const sleep = (ms: number) => new Promise((resolve) => setTimeout(resolve, ms));
while (reqs.length > 5) {
if (req.socket.destroyed) {
// 连接销毁，不再执行
console.log("destroyed");
return { req, res };
}
await sleep(50);
}
const r = Promise.resolve(next(req, res));
reqs.push(r);
r.finally(() => {
const index = reqs.indexOf(r);
if (index > -1) {
reqs.splice(index, 1);
}
});
return r;
};
const staticFileMiddleware: cMiddleware = async function (req, res, next) {
let newRes: Response;
if (req.method === "GET") {
@ -83,28 +64,31 @@ const staticFileMiddleware: cMiddleware = async function (req, res, next) {
return next(req, newRes);
};
const corsMiddleware: cMiddleware = async (req, res, next) => {
// 允许所有域跨域请求
res.headers["Access-Control-Allow-Origin"] = "*";
// 如果你只想允许特定域名：
// res.headers["Access-Control-Allow-Origin"] = "https://example.com";
// 允许常见的 HTTP 方法
res.headers["Access-Control-Allow-Methods"] = "GET, POST, PUT, DELETE, OPTIONS";
// 允许的请求头
res.headers["Access-Control-Allow-Headers"] = "Content-Type, Authorization";
// 如果是 OPTIONS 请求（预检请求），直接返回成功响应
if (req.method === "OPTIONS") {
res.statusCode = 204;
res.headers["Content-Length"] = "0";
res.body = "";
// 直接结束请求，不继续传递到下一个中间件
return { req, res };
return {
req,
res: new Response("", {
status: 204,
headers: {
"Content-Length": "0",
},
}),
};
} else {
return next(req, res);
const newRes = await next(req, res);
// 允许所有域跨域请求
newRes.res.headers.append("Access-Control-Allow-Origin", "*");
// 如果你只想允许特定域名：
// res.headers["Access-Control-Allow-Origin"] = "https://example.com";
// 允许常见的 HTTP 方法
newRes.res.headers.append("Access-Control-Allow-Methods", "GET, POST, PUT, DELETE, OPTIONS");
// 允许的请求头
newRes.res.headers.append("Access-Control-Allow-Headers", "Content-Type, Authorization");
return newRes;
}
};
const fontCache: { [key: string]: any } = {};
const textCache: { [key: string]: any } = {};
const fontApiMiddleware: cMiddleware = async (req, res, next) => {
if (!req.url.startsWith("/api")) return next(req, res);
// 创建一个新的 URL 对象（需要一个完整的 URL，必须包含协议和主机）
@ -117,7 +101,7 @@ const fontApiMiddleware: cMiddleware = async (req, res, next) => {
}
const path = `font/${font}`;
const fontType = path.split(".").pop() as "ttf";
const oldFontBuffer = fontCache[path] ?? new Uint8Array(await readFile(path)).buffer;
const oldFontBuffer = new Uint8Array(await readFile(path)).buffer;
const outType = "ttf";
const newFont = await fontSubset(oldFontBuffer, text, {
@ -140,7 +124,7 @@ const server = new SimpleHttpServer({ port: 8087 });
server.use(
logMiddleware,
// limitMiddleware,
// corsMiddleware,
corsMiddleware,
fontApiMiddleware,
staticFileMiddleware,
);