概念
- 使用Deno的集成HTTP服务器运行您自己的Web服务器。
概览
只需几行代码，您就可以运行自己的HTTP Web服务器，并控制响应状态、请求头等。
ℹ️ 原生的HTTP服务器目前不稳定，这意味着API还没有定稿，在未来版本的Deno中可能会发生破坏性的变化。要让这里讨论的API可用，您必须使用
--unstable标志运行deno。
web server例子
在此示例中，客户端的用户代理返回给客户端：
webserver.ts:
// Start listening on port 8080 of localhost.
const server = Deno.listen({ port: 8080 });
console.log(`HTTP webserver running. Access it at: http://localhost:8080/`);
// Connections to the server will be yielded up as an async iterable.
for await (const conn of server) {
// In order to not be blocking, we need to handle each connection individually
// in its own async function.
(async () => {
// This "upgrades" a network connection into an HTTP connection.
const httpConn = Deno.serveHttp(conn);
// Each request sent over the HTTP connection will be yielded as an async
// iterator from the HTTP connection.
for await (const requestEvent of httpConn) {
// The native HTTP server uses the web standard `Request` and `Response`
// objects.
const body = `Your user-agent is:\n\n${requestEvent.request.headers.get(
"user-agent",
) ?? "Unknown"}`;
// The requestEvent's `.respondWith()` method is how we send the response
// back to the client.
requestEvent.respondWith(
new Response(body, {
status: 200,
}),
);
}
})();
}
然后运行下面命令:
deno run --allow-net --unstable webserver.ts
然后在浏览器中导航到http://localhost:8080/‘。
使用 std/http 库
如果您不想使用不稳定的API，您仍然可以使用标准库的HTTP服务器：
webserver.ts:
import { serve } from "https://deno.land/std@0.95.0/http/server.ts";
const server = serve({ port: 8080 });
console.log(`HTTP webserver running. Access it at: http://localhost:8080/`);
for await (const request of server) {
let bodyContent = "Your user-agent is:\n\n";
bodyContent += request.headers.get("user-agent") || "Unknown";
request.respond({ status: 200, body: bodyContent });
}
然后运行下面的命令:
deno run --allow-net webserver.ts
