check-online-instance/index.js

const axios = require('axios');

class InstanceChecker {
  constructor() {
    this.axiosInstance = axios.create();
  }

  async checkInstanceStatus(instance) {
    try {
      const response = await Promise.race([
        this.axiosInstance.get(`https://${instance}/api/v1/instance`),
        new Promise((resolve, reject) => {
          setTimeout(() => reject(new Error('Tempo de espera excedido')), 6000);
        })
      ]);

      return { instance, status: true };
    } catch (error) {
      return { instance, status: false };
    }
  }

  async fetchPeersFromAPI() {
    try {
      const response = await this.axiosInstance.get('https://mastodon.social/api/v1/instance/peers');
      return response.data;
    } catch (error) {
      console.error('Erro ao buscar peers da API:', error.message);
      return [];
    }
  }

  async checkPeersStatus() {
    const peers = await this.fetchPeersFromAPI();

    if (peers.length === 0) {
      console.log('Nenhum peer encontrado na API.');
      return;
    }

    const results = [];

    for (const peer of peers) {
      try {
        const result = await this.checkInstanceStatus(peer);
        console.log(`${result.instance} está ${result.status}.`);
        results.push(result);
      } catch (error) {
        console.error(`Erro ao verificar o status de ${peer}:`, error.message);
      }
    }
  }
}

const instanceChecker = new InstanceChecker();
instanceChecker.checkPeersStatus();