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Showing content from https://github.com/nuintun/koa-files below:

nuintun/koa-files: A static files serving middleware for koa.

A static files serving middleware for koa.

import { Middleware } from 'koa';
import fs, { Stats } from 'node:fs';

interface Headers {
  [key: string]: string | string[];
}

interface IgnoreFunction {
  (path: string): Promise<boolean> | boolean;
}

interface HighWaterMarkFunction {
  (path: string, stats: Stats): Promise<number> | number;
}

interface HeadersFunction {
  (path: string, stats: Stats): Promise<Headers | void> | Headers | void;
}

export interface FileSystem {
  stat: typeof fs.stat;
  open: typeof fs.open;
  read: typeof fs.read;
  close: typeof fs.close;
}

export interface Options {
  etag?: boolean;
  defer?: boolean;
  fs?: FileSystem;
  acceptRanges?: boolean;
  lastModified?: boolean;
  ignore?: IgnoreFunction;
  headers?: Headers | HeadersFunction;
  highWaterMark?: number | HighWaterMarkFunction;
}

export function server(root: string, options?: Options): Middleware;

• Root directory string.
• Nothing above this root directory can be served.

• Defaults to node:fs.
• The file system to used.

• Defaults to false.
• If true, serves after await next().
• Allowing any downstream middleware to respond first.

• Defaults to true.
• Enable or disable etag generation.
• Use weak etag internally.
• Can be overridden by the headers.

• Defaults to true.
• Enable or disable accepting ranged requests.
• Disabling this will not send Accept-Ranges and ignore the contents of the Range request header.
• Can be overridden by the headers.

• Defaults to true.
• Enable or disable Last-Modified header.
• Use the file system's last modified value.
• Can be overridden by the headers.

• Defaults to 65536 (64 KiB).
• Set the high water mark for the read stream.

• Defaults to undefined.
• Function that determines if a file should be ignored.

• Defaults to undefined.
• Set headers to be sent.
• See docs: Headers in MDN.

/**
 * @module server
 * @license MIT
 * @author nuintun
 */

import Koa from 'koa';
import { server } from 'koa-files';

const app = new Koa();
const port = process.env.PORT || 80;

// Static files server
app.use(
  server('tests', {
    headers: {
      'Cache-Control': 'public, max-age=31557600'
    }
  })
);

/**
 * @function httpError
 * @param {NodeJS.ErrnoException} error
 * @returns {boolean}
 */
function httpError(error) {
  return /^(EOF|EPIPE|ECANCELED|ECONNRESET|ECONNABORTED)$/i.test(error.code);
}

// Listen error event
app.on('error', error => {
  !httpError(error) && console.error(error);
});

// Start server
app.listen(port, () => {
  console.log(`> server running at: 127.0.0.1:${port}`);
});

Support multipart range and download resumption.

MIT

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