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deno serve
deno serve 使用 Deno.serve() 将一个文件作为 HTTP 服务器运行。该文件必须导出一个带有 fetch 处理器的默认对象。有关构建 HTTP 服务器的完整指南，请参阅 编写 HTTP 服务器。
基本用法 Jump to heading
export default {
fetch(_req: Request) {
return new Response("Hello world!");
},
} satisfies Deno.ServeDefaultExport;
deno serve server.ts
默认情况下，服务器监听 8000 端口。可以使用 --port 覆盖它：
deno serve --port=3000 server.ts
路由请求 Jump to heading
fetch 处理器接收一个标准的
Request 对象。
使用 URL 进行路由：
export default {
fetch(request: Request) {
const url = new URL(request.url);
if (url.pathname === "/api/health") {
return Response.json({ status: "ok" });
}
return new Response("Not found", { status: 404 });
},
} satisfies Deno.ServeDefaultExport;
绑定到主机名 Jump to heading
默认情况下，deno serve 监听 0.0.0.0。使用 --host 绑定到特定接口：
deno serve --host=127.0.0.1 server.ts
水平扩展 Jump to heading
跨多个 CPU 核心运行多个服务器实例，以获得更好的吞吐量：
deno serve --parallel server.ts
监视模式 Jump to heading
在文件发生更改时自动重启服务器：
deno serve --watch server.ts
权限 Jump to heading
deno serve 会自动允许服务器监听，无需 --allow-net。其他权限（如文件读取）必须显式授予：
deno serve --allow-read server.ts
Type checking options Jump to heading
--check Jump to heading
Enable type-checking. This subcommand does not type-check by default If the value of "all" is supplied, remote modules will be included. Alternatively, the 'deno check' subcommand can be used.
--no-check Jump to heading
Skip type-checking. If the value of "remote" is supplied, diagnostic errors from remote modules will be ignored.
Dependency management options Jump to heading
--cached-only Jump to heading
Require that remote dependencies are already cached.
--frozen Jump to heading
Error out if lockfile is out of date.
--import-map Jump to heading
Load import map file from local file or remote URL.
--lock Jump to heading
Check the specified lock file. (If value is not provided, defaults to "./deno.lock").
--no-lock Jump to heading
Disable auto discovery of the lock file.
--no-npm Jump to heading
Do not resolve npm modules.
--no-remote Jump to heading
Do not resolve remote modules.
--node-modules-dir Jump to heading
Sets the node modules management mode for npm packages.
--reload Jump to heading
Short flag: -r
Reload source code cache (recompile TypeScript) no value Reload everything jsr:@std/http/file-server,jsr:@std/assert/assert-equals Reloads specific modules npm: Reload all npm modules npm:chalk Reload specific npm module.
--vendor Jump to heading
Toggles local vendor folder usage for remote modules and a node_modules folder for npm packages.
Options Jump to heading
--allow-scripts Jump to heading
Allow running npm lifecycle scripts for the given packages
Note: Scripts will only be executed when using a node_modules directory (--node-modules-dir).
--cert Jump to heading
Load certificate authority from PEM encoded file.
--conditions Jump to heading
Use this argument to specify custom conditions for npm package exports. You can also use DENO_CONDITIONS env var. .
--config Jump to heading
Short flag: -c
Configure different aspects of deno including TypeScript, linting, and code formatting.
Typically the configuration file will be called deno.json or deno.jsonc and
automatically detected; in that case this flag is not necessary.
--cpu-prof Jump to heading
Start the V8 CPU profiler on startup and write the profile to disk on exit. Profiles are written to the current directory by default.
--cpu-prof-dir Jump to heading
Directory where the V8 CPU profiles will be written. Implicitly enables --cpu-prof.
--cpu-prof-flamegraph Jump to heading
Generate an SVG flamegraph alongside the CPU profile.
--cpu-prof-interval Jump to heading
Sampling interval in microseconds for CPU profiling (default: 1000).
--cpu-prof-md Jump to heading
Generate a human-readable markdown report alongside the CPU profile.
--cpu-prof-name Jump to heading
Filename for the CPU profile (defaults to CPU.
--env-file Jump to heading
Load environment variables from local file Only the first environment variable with a given key is used. Existing process environment variables are not overwritten, so if variables with the same names already exist in the environment, their values will be preserved. Where multiple declarations for the same environment variable exist in your .env file, the first one encountered is applied. This is determined by the order of the files you pass as arguments.
--ext Jump to heading
Set content type of the supplied file.
--host Jump to heading
The TCP address to serve on, defaulting to 0.0.0.0 (all interfaces).
--location Jump to heading
Value of globalThis.location used by some web APIs.
--minimum-dependency-age Jump to heading
(Unstable) The age in minutes, ISO-8601 duration or RFC3339 absolute timestamp (e.g. '120' for two hours, 'P2D' for two days, '2025-09-16' for cutoff date, '2025-09-16T12:00:00+00:00' for cutoff time, '0' to disable).
--no-code-cache Jump to heading
Disable V8 code cache feature.
--no-config Jump to heading
Disable automatic loading of the configuration file.
--open Jump to heading
Open the browser on the address that the server is running on.
--parallel Jump to heading
Run multiple server workers in parallel. Parallelism defaults to the number of available CPUs or the value of the DENO_JOBS environment variable.
--port Jump to heading
The TCP port to serve on. Pass 0 to pick a random free port [default: 8000]
--preload Jump to heading
A list of files that will be executed before the main module.
--require Jump to heading
A list of CommonJS modules that will be executed before the main module.
--seed Jump to heading
Set the random number generator seed.
--tunnel Jump to heading
Short flag: -t
Execute tasks with a tunnel to Deno Deploy.
Create a secure connection between your local machine and Deno Deploy, providing access to centralised environment variables, logging, and serving from your local environment to the public internet.
--v8-flags Jump to heading
To see a list of all available flags use --v8-flags=--help
Flags can also be set via the DENO_V8_FLAGS environment variable.
Any flags set with this flag are appended after the DENO_V8_FLAGS environment variable.
Debugging options Jump to heading
--inspect Jump to heading
Activate inspector on host:port [default: 127.0.0.1:9229]. Host and port are optional. Using port 0 will assign a random free port.
--inspect-brk Jump to heading
Activate inspector on host:port, wait for debugger to connect and break at the start of user script.
--inspect-wait Jump to heading
Activate inspector on host:port and wait for debugger to connect before running user code.
File watching options Jump to heading
--no-clear-screen Jump to heading
Do not clear terminal screen when under watch mode.
--watch Jump to heading
Watch for file changes and restart process automatically. Local files from entry point module graph are watched by default. Additional paths might be watched by passing them as arguments to this flag.
--watch-exclude Jump to heading
Exclude provided files/patterns from watch mode.
--watch-hmr Jump to heading
Watch for file changes and restart process automatically. Local files from entry point module graph are watched by default. Additional paths might be watched by passing them as arguments to this flag.