Yves Gugger
85b1be691a
- Disabled verify_drops scheduler job (caused RDAP rate limit bans) - Zone files now saved without RDAP verification (zone diff is reliable) - Added date-based zone file snapshots with 3-day retention - Improved DropsTab UI with better status display: - "In Transition" with countdown timer for dropping_soon - "Available Now" with Buy button - "Re-registered" for taken domains - Track button for dropping_soon domains - Added --shm-size=8g to backend container for multiprocessing - Removed duplicate host cron job (scheduler handles everything)
530 lines
19 KiB
Python
530 lines
19 KiB
Python
"""
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ICANN CZDS (Centralized Zone Data Service) Client
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==================================================
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Downloads zone files from ICANN CZDS, parses them, and detects dropped domains.
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Authentication: OAuth2 with username/password
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Zone Format: Standard DNS zone file format (.txt.gz)
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Usage:
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client = CZDSClient(username, password)
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await client.sync_all_zones(db)
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"""
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import asyncio
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import gzip
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import hashlib
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import logging
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import os
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import re
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import shutil
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from datetime import datetime, timedelta
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from pathlib import Path
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from typing import Optional
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import httpx
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from sqlalchemy import select, func, text
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from sqlalchemy.ext.asyncio import AsyncSession
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from app.config import get_settings
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from app.models.zone_file import ZoneSnapshot, DroppedDomain
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logger = logging.getLogger(__name__)
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settings = get_settings()
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# ============================================================================
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# CONSTANTS
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# ============================================================================
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CZDS_AUTH_URL = "https://account-api.icann.org/api/authenticate"
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CZDS_ZONES_URL = "https://czds-api.icann.org/czds/downloads/links"
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CZDS_DOWNLOAD_BASE = "https://czds-download-api.icann.org"
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# TLDs we have approved access to
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APPROVED_TLDS = ["xyz", "org", "online", "info", "dev", "app"]
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# Regex to extract domain names from zone file NS records
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# Format: example.tld. IN NS ns1.example.com.
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NS_RECORD_PATTERN = re.compile(r'^([a-z0-9][-a-z0-9]*)\.[a-z]+\.\s+\d*\s*IN\s+NS\s+', re.IGNORECASE)
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# ============================================================================
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# CZDS CLIENT
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# ============================================================================
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class CZDSClient:
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"""Client for ICANN CZDS zone file downloads."""
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def __init__(
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self,
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username: Optional[str] = None,
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password: Optional[str] = None,
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data_dir: Optional[Path] = None
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):
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self.username = username or os.getenv("CZDS_USERNAME") or settings.czds_username
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self.password = password or os.getenv("CZDS_PASSWORD") or settings.czds_password
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self.data_dir = data_dir or Path(os.getenv("CZDS_DATA_DIR", "/tmp/pounce_czds"))
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self.data_dir.mkdir(parents=True, exist_ok=True)
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self._token: Optional[str] = None
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self._token_expires: Optional[datetime] = None
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async def _authenticate(self) -> str:
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"""Authenticate with ICANN and get access token."""
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if self._token and self._token_expires and datetime.utcnow() < self._token_expires:
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return self._token
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if not self.username or not self.password:
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raise ValueError("CZDS credentials not configured. Set CZDS_USERNAME and CZDS_PASSWORD.")
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logger.info("Authenticating with ICANN CZDS...")
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async with httpx.AsyncClient(timeout=30) as client:
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response = await client.post(
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CZDS_AUTH_URL,
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json={"username": self.username, "password": self.password},
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headers={"Content-Type": "application/json"}
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)
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if response.status_code != 200:
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logger.error(f"CZDS authentication failed: {response.status_code} {response.text}")
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raise RuntimeError(f"CZDS authentication failed: {response.status_code}")
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data = response.json()
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self._token = data.get("accessToken")
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# Token expires in 24 hours, refresh after 23 hours
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self._token_expires = datetime.utcnow() + timedelta(hours=23)
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logger.info("CZDS authentication successful")
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return self._token
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async def get_available_zones(self) -> dict[str, str]:
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"""
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Get list of zone files available for download.
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Returns dict mapping TLD to download URL.
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"""
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token = await self._authenticate()
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async with httpx.AsyncClient(timeout=60) as client:
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response = await client.get(
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CZDS_ZONES_URL,
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headers={"Authorization": f"Bearer {token}"}
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)
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if response.status_code != 200:
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logger.error(f"Failed to get zone list: {response.status_code}")
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return {}
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# Response is a list of download URLs
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urls = response.json()
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# Extract TLDs and their URLs
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zones = {}
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for url in urls:
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# URL format: https://czds-download-api.icann.org/czds/downloads/xyz.zone
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match = re.search(r'/([a-z0-9-]+)\.zone$', url, re.IGNORECASE)
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if match:
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tld = match.group(1).lower()
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zones[tld] = url
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logger.info(f"Available zones: {list(zones.keys())}")
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return zones
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async def download_zone(self, tld: str, download_url: Optional[str] = None) -> Optional[Path]:
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"""
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Download a zone file for a specific TLD.
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Args:
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tld: The TLD to download
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download_url: Optional explicit download URL (from get_available_zones)
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"""
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token = await self._authenticate()
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# Use provided URL or construct one
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if not download_url:
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download_url = f"{CZDS_DOWNLOAD_BASE}/czds/downloads/{tld}.zone"
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output_path = self.data_dir / f"{tld}.zone.txt.gz"
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logger.info(f"Downloading zone file for .{tld} from {download_url}...")
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async with httpx.AsyncClient(timeout=600, follow_redirects=True) as client:
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try:
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async with client.stream(
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"GET",
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download_url,
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headers={"Authorization": f"Bearer {token}"}
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) as response:
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if response.status_code != 200:
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logger.error(f"Failed to download .{tld}: {response.status_code}")
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return None
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# Stream to file
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with open(output_path, "wb") as f:
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async for chunk in response.aiter_bytes(chunk_size=1024 * 1024):
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f.write(chunk)
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file_size = output_path.stat().st_size / (1024 * 1024)
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logger.info(f"Downloaded .{tld} zone file: {file_size:.1f} MB")
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return output_path
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except Exception as e:
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logger.error(f"Error downloading .{tld}: {e}")
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return None
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def extract_zone_file(self, gz_path: Path) -> Path:
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"""
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Extract gzipped zone file to RAM drive for fastest access.
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Falls back to disk if RAM drive unavailable.
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"""
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from app.services.zone_file_parser import HighPerformanceZoneParser
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parser = HighPerformanceZoneParser(use_ram_drive=True)
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output_path = parser.extract_to_ram(gz_path)
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# Remove gz file to save space
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gz_path.unlink()
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return output_path
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def parse_zone_file(self, zone_path: Path, tld: str) -> set[str]:
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"""
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Parse zone file and extract unique domain names.
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Uses high-performance parallel parser with all CPU cores
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and RAM drive for maximum speed on large zone files.
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Returns set of domain names (without TLD suffix).
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"""
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from app.services.zone_file_parser import HighPerformanceZoneParser
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# Use parallel parser with RAM drive
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parser = HighPerformanceZoneParser(use_ram_drive=True)
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try:
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domains = parser.parse_zone_file_parallel(zone_path, tld)
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return domains
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finally:
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parser.cleanup_ram_drive()
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def compute_checksum(self, domains: set[str]) -> str:
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"""Compute SHA256 checksum of sorted domain list."""
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sorted_domains = "\n".join(sorted(domains))
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return hashlib.sha256(sorted_domains.encode()).hexdigest()
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async def get_previous_domains(self, tld: str) -> Optional[set[str]]:
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"""Load previous day's domain set from cache file."""
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cache_file = self.data_dir / f"{tld}_domains.txt"
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if cache_file.exists():
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try:
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content = cache_file.read_text()
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return set(line.strip() for line in content.splitlines() if line.strip())
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except Exception as e:
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logger.warning(f"Failed to load cache for .{tld}: {e}")
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return None
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async def save_domains(self, tld: str, domains: set[str]):
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"""Save current domains to cache file with date-based retention."""
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from app.config import get_settings
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settings = get_settings()
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# Save current file (for next sync comparison)
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cache_file = self.data_dir / f"{tld}_domains.txt"
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cache_file.write_text("\n".join(sorted(domains)))
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# Also save dated snapshot for retention
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today = datetime.now().strftime("%Y-%m-%d")
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dated_file = self.data_dir / f"{tld}_domains_{today}.txt"
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if not dated_file.exists():
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dated_file.write_text("\n".join(sorted(domains)))
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logger.info(f"Saved snapshot: {dated_file.name}")
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# Cleanup old snapshots (keep last N days)
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retention_days = getattr(settings, 'zone_retention_days', 3)
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await self._cleanup_old_snapshots(tld, retention_days)
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logger.info(f"Saved {len(domains):,} domains for .{tld}")
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async def _cleanup_old_snapshots(self, tld: str, keep_days: int = 3):
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"""Remove zone file snapshots older than keep_days."""
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import re
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from datetime import timedelta
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cutoff = datetime.now() - timedelta(days=keep_days)
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pattern = re.compile(rf"^{tld}_domains_(\d{{4}}-\d{{2}}-\d{{2}})\.txt$")
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for file in self.data_dir.glob(f"{tld}_domains_*.txt"):
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match = pattern.match(file.name)
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if match:
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file_date = datetime.strptime(match.group(1), "%Y-%m-%d")
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if file_date < cutoff:
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file.unlink()
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logger.info(f"Deleted old snapshot: {file.name}")
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async def process_drops(
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self,
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db: AsyncSession,
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tld: str,
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previous: set[str],
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current: set[str]
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) -> list[dict]:
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"""
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Find dropped domains and store them directly.
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NOTE: We do NOT verify availability here to avoid RDAP rate limits/bans.
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Verification happens separately in the 'verify_drops' scheduler job
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which runs in small batches throughout the day.
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"""
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dropped = previous - current
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if not dropped:
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logger.info(f"No dropped domains found for .{tld}")
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return []
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logger.info(f"Found {len(dropped):,} dropped domains for .{tld}, saving to database...")
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today = datetime.utcnow().replace(hour=0, minute=0, second=0, microsecond=0)
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# Store all drops - availability will be verified separately
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dropped_records = []
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batch_size = 1000
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dropped_list = list(dropped)
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for i in range(0, len(dropped_list), batch_size):
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batch = dropped_list[i:i + batch_size]
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for name in batch:
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try:
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record = DroppedDomain(
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domain=name, # Just the name, not full domain!
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tld=tld,
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dropped_date=today,
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length=len(name),
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is_numeric=name.isdigit(),
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has_hyphen='-' in name,
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availability_status='unknown' # Will be verified later
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)
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db.add(record)
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dropped_records.append({
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"domain": f"{name}.{tld}",
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"length": len(name),
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})
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except Exception as e:
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# Duplicate or other error - skip
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pass
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# Commit batch
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try:
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await db.commit()
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except Exception:
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await db.rollback()
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if (i + batch_size) % 5000 == 0:
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logger.info(f"Saved {min(i + batch_size, len(dropped_list)):,}/{len(dropped_list):,} drops")
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# Final commit
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try:
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await db.commit()
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except Exception:
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await db.rollback()
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logger.info(f"CZDS drops for .{tld}: {len(dropped_records):,} saved (verification pending)")
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return dropped_records
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async def sync_zone(
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self,
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db: AsyncSession,
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tld: str,
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download_url: Optional[str] = None
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) -> dict:
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"""
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Sync a single zone file:
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1. Download zone file
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2. Extract and parse
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3. Compare with previous snapshot
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4. Store dropped domains
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5. Save new snapshot
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Args:
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db: Database session
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tld: TLD to sync
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download_url: Optional explicit download URL
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"""
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logger.info(f"Starting sync for .{tld}")
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result = {
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"tld": tld,
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"status": "pending",
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"current_count": 0,
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"previous_count": 0,
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"dropped_count": 0,
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"new_count": 0,
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"error": None
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}
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try:
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# Download zone file
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gz_path = await self.download_zone(tld, download_url)
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if not gz_path:
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result["status"] = "download_failed"
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result["error"] = "Failed to download zone file"
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return result
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# Extract
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zone_path = self.extract_zone_file(gz_path)
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# Parse
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current_domains = self.parse_zone_file(zone_path, tld)
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result["current_count"] = len(current_domains)
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# Clean up zone file (can be very large)
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# Note: Parser may have already deleted the file during cleanup_ram_drive()
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if zone_path.exists():
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zone_path.unlink()
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# Get previous snapshot
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previous_domains = await self.get_previous_domains(tld)
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if previous_domains:
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result["previous_count"] = len(previous_domains)
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# Find dropped domains
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dropped = await self.process_drops(db, tld, previous_domains, current_domains)
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result["dropped_count"] = len(dropped)
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result["new_count"] = len(current_domains - previous_domains)
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# Save current snapshot
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await self.save_domains(tld, current_domains)
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# Save snapshot metadata
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checksum = self.compute_checksum(current_domains)
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snapshot = ZoneSnapshot(
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tld=tld,
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snapshot_date=datetime.utcnow(),
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domain_count=len(current_domains),
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checksum=checksum
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)
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db.add(snapshot)
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await db.commit()
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result["status"] = "success"
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logger.info(
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f"Sync complete for .{tld}: "
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f"{result['current_count']:,} domains, "
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f"{result['dropped_count']:,} dropped, "
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f"{result['new_count']:,} new"
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)
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except Exception as e:
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logger.exception(f"Error syncing .{tld}: {e}")
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result["status"] = "error"
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result["error"] = str(e)
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return result
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async def sync_all_zones(
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self,
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db: AsyncSession,
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tlds: Optional[list[str]] = None
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) -> list[dict]:
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"""
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Sync all approved zone files.
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Args:
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db: Database session
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tlds: Optional list of TLDs to sync. Defaults to APPROVED_TLDS.
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Returns:
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List of sync results for each TLD.
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"""
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target_tlds = tlds or APPROVED_TLDS
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# Get available zones with their download URLs
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available_zones = await self.get_available_zones()
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logger.info(f"Starting CZDS sync for {len(target_tlds)} zones: {target_tlds}")
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logger.info(f"Available zones: {list(available_zones.keys())}")
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results = []
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for tld in target_tlds:
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# Get the actual download URL for this TLD
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download_url = available_zones.get(tld)
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if not download_url:
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logger.warning(f"No download URL available for .{tld}")
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results.append({
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"tld": tld,
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"status": "not_available",
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"current_count": 0,
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"previous_count": 0,
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"dropped_count": 0,
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"new_count": 0,
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"error": f"No access to .{tld} zone"
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})
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continue
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result = await self.sync_zone(db, tld, download_url)
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results.append(result)
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# Small delay between zones to be nice to ICANN servers
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await asyncio.sleep(2)
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# Summary
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success_count = sum(1 for r in results if r["status"] == "success")
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total_dropped = sum(r["dropped_count"] for r in results)
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logger.info(
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f"CZDS sync complete: "
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f"{success_count}/{len(target_tlds)} zones successful, "
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f"{total_dropped:,} total dropped domains"
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)
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return results
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# ============================================================================
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# STANDALONE SCRIPT
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# ============================================================================
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|
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async def main():
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"""Standalone script to run CZDS sync."""
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import sys
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from app.database import AsyncSessionLocal, init_db
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# Initialize database
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await init_db()
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# Parse arguments
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tlds = sys.argv[1:] if len(sys.argv) > 1 else APPROVED_TLDS
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print(f"🌐 CZDS Zone File Sync")
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print(f"📂 TLDs: {', '.join(tlds)}")
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print("-" * 50)
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client = CZDSClient()
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async with AsyncSessionLocal() as db:
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results = await client.sync_all_zones(db, tlds)
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print("\n" + "=" * 50)
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print("📊 RESULTS")
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print("=" * 50)
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for r in results:
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status_icon = "✅" if r["status"] == "success" else "❌"
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print(f"{status_icon} .{r['tld']}: {r['current_count']:,} domains, "
|
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f"{r['dropped_count']:,} dropped, {r['new_count']:,} new")
|
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if r["error"]:
|
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print(f" ⚠️ Error: {r['error']}")
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|
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total_dropped = sum(r["dropped_count"] for r in results)
|
|
print(f"\n🎯 Total dropped domains: {total_dropped:,}")
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|
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if __name__ == "__main__":
|
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asyncio.run(main())
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