fediverse/getpeers.py

import os
import sys
import time
from datetime import datetime
import requests
import json
import psycopg2
import ray

ray.init(num_cpus = 32) # Specify this system CPUs.

def write_servers(world_servers):

    i = 0

    while i < len(world_servers):

        insert_sql = "INSERT INTO world(server, federated_with, updated_at, saved_at) VALUES(%s,%s,%s,%s) ON CONFLICT DO NOTHING"

        conn = None

        try:

            conn = psycopg2.connect(database = fediverse_db, user = fediverse_db_user, password = "", host = "/var/run/postgresql", port = "5432")

            cur = conn.cursor()

            cur.execute(insert_sql, (world_servers[i], peer, now, now,))

            print(f'writing to database {str(i)} of {str(len(world_servers))}: {world_servers[i]}')

            conn.commit()

            cur.close()

        except (Exception, psycopg2.DatabaseError) as error:

            print(error)

        finally:

            if conn is not None:

                conn.close()

        i += 1

@ray.remote
def get_peers(peer):

    try:

        user_agent = {'User-agent': "fediverse's stats (fediverse@mastodont.cat)"}

        response = requests.get('https://' + peer + peers_api, headers = user_agent, timeout=3)

        response_json = response.json()

        if response.status_code == 200:

            try:

                print(f"Server: {peer}, federated with {str(len(response_json))} servers")

                for peer_peer in response_json:

                    exist_count = world_peers.count(peer_peer)

                    if exist_count == 0:

                        world_peers.append(peer_peer)

            except:

                pass
    except:

        pass

def get_parameter( parameter, file_path ):

    # Check if secrets file exists
    if not os.path.isfile(file_path):
        print("File %s not found, exiting."%file_path)
        sys.exit(0)

    # Find parameter in file
    with open( file_path ) as f:
        for line in f:
            if line.startswith( parameter ):
                return line.replace(parameter + ":", "").strip()

    # Cannot find parameter, exit
    print(file_path + "  Missing parameter %s "%parameter)
    sys.exit(0)

###############################################################################
# main

if __name__ == '__main__':

    now = datetime.now()

    peers_api = '/api/v1/instance/peers?'

    # Load configuration from config file
    config_filepath = "config/config.txt"
    mastodon_hostname = get_parameter("mastodon_hostname", config_filepath)

    # Load database config from db_config file
    db_config_filepath = "config/db_config.txt"
    fediverse_db = get_parameter("fediverse_db", db_config_filepath)
    fediverse_db_user = get_parameter("fediverse_db_user", db_config_filepath)

    world_peers = []

    user_agent = {'User-agent': "fediverse's stats (fediverse@mastodont.cat)"}

    res = requests.get('https://' + mastodon_hostname + peers_api, headers = user_agent, timeout=3)

    hostname_peers = res.json()

    for peer in hostname_peers:

        exist_count = world_peers.count(peer)

        if exist_count == 0:

            world_peers.append(peer)

    start = time.time()

    results = ray.get([get_peers.remote(server) for server in hostname_peers])

    print(f"duration = {time.time() - start}.\nprocessed servers: {len(results)}")

    write_servers(world_peers)