JavaScriptでNextCloudからファイルをダウンロードする方法

import fetch from 'node-fetch';
import * as fs from 'fs';

const nextCloudUrl = 'http://localhost:8081';
const username = 'username';
const password = '******';
const filePath = '/Readme.md';

const download = async () => {
  const url = `${nextCloudUrl}/remote.php/dav/files/${username}${filePath}`;
  const response = await fetch(url, {
    headers: {
      'Authorization': 'Basic ' + Buffer.from(username + ':' + password).toString('base64')
    }
  });

  if (!response.ok) {
    throw new Error(`Error: ${response.status}`);
  }

  if (response.body) {
    const fileStream = fs.createWriteStream('./downloaded_file.txt');
    response.body.pipe(fileStream);
    fileStream.on('finish', () => {
      console.log('File downloaded successfully.');
    });
  } else {
    console.log('No response body to download.');
  }
};

download().catch(error => console.error(error));

クラス版

import fetch from 'node-fetch';
import * as fs from 'fs';

class NextCloudClient {
  private nextCloudUrl: string;
  private username: string;
  private password: string;

  constructor(nextCloudUrl: string, username: string, password: string) {
    this.nextCloudUrl = nextCloudUrl;
    this.username = username;
    this.password = password;
  }

  private getAuthHeader(): string {
    return 'Basic ' + Buffer.from(this.username + ':' + this.password).toString('base64');
  }

  public async download(filePath: string, destination: string): Promise<void> {
    const url = `${this.nextCloudUrl}/remote.php/dav/files/${this.username}${filePath}`;
    const response = await fetch(url, {
      headers: {
        'Authorization': this.getAuthHeader()
      }
    });

    if (!response.ok) {
      throw new Error(`Error: ${response.status}`);
    }

    if (response.body) {
      const fileStream = fs.createWriteStream(destination);
      response.body.pipe(fileStream);
      return new Promise((resolve, reject) => {
        fileStream.on('finish', () => {
          console.log('File downloaded successfully.');
          resolve();
        });
        fileStream.on('error', reject);
      });
    } else {
      console.log('No response body to download.');
    }
  }
}

// Usage
const client = new NextCloudClient('http://localhost:8081', 'user', '******');
client.download('/Readme.md', './downloaded_file.txt').catch(console.error);