从 HTTPS 导入 | Node.js API 文档

¥Import from HTTPS

在当前的 Node.js 中，以 https:// 开头的说明符是实验性的（请参阅 HTTPS 和 HTTP 导入）。

¥In current Node.js, specifiers starting with https:// are experimental (see HTTPS and HTTP imports).

下面的钩子注册钩子以启用对此类说明符的基本支持。虽然这看起来像是对 Node.js 核心功能的重大改进，但实际使用这些钩子有很大的缺点：性能比从磁盘加载文件慢得多，没有缓存，也没有安全性。

¥The hook below registers hooks to enable rudimentary support for such specifiers. While this may seem like a significant improvement to Node.js core functionality, there are substantial downsides to actually using these hooks: performance is much slower than loading files from disk, there is no caching, and there is no security.

// https-hooks.mjs
import { get } from 'node:https';

export function load(url, context, nextLoad) {
  // For JavaScript to be loaded over the network, we need to fetch and
  // return it.
  if (url.startsWith('https://')) {
    return new Promise((resolve, reject) => {
      get(url, (res) => {
        let data = '';
        res.setEncoding('utf8');
        res.on('data', (chunk) => data += chunk);
        res.on('end', () => resolve({
          // This example assumes all network-provided JavaScript is ES module
          // code.
          format: 'module',
          shortCircuit: true,
          source: data,
        }));
      }).on('error', (err) => reject(err));
    });
  }

  // Let Node.js handle all other URLs.
  return nextLoad(url);
}

// main.mjs
import { VERSION } from 'https://coffeescript.org/browser-compiler-modern/coffeescript.js';

console.log(VERSION);

使用前面的 hooks 模块，运行 node --import 'data:text/javascript,import { register } from "node:module"; import { pathToFileURL } from "node:url"; register(pathToFileURL("./https-hooks.mjs"));' ./main.mjs 会在 main.mjs 中的 URL 处打印每个模块的 CoffeeScript 的当前版本。

¥With the preceding hooks module, running node --import 'data:text/javascript,import { register } from "node:module"; import { pathToFileURL } from "node:url"; register(pathToFileURL("./https-hooks.mjs"));' ./main.mjs prints the current version of CoffeeScript per the module at the URL in main.mjs.