484 lines
18 KiB
Python
484 lines
18 KiB
Python
"""
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download_attachments_v1.3.py
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Nazev: download_attachments_v1.3.py
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Verze: 1.3
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Datum: 2026-06-02
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Autor: vladimir.buzalka
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Popis:
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Stahuje skutecne prilohy (is_inline=False) vsech emailu z MongoDB
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pres Microsoft Graph API a uklada je do adresare
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/mnt/Emails/<schránka>/Attachments/.
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Schránka se predava jako povinny parametr --mailbox.
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Deduplikace podle SHA256 hashe obsahu:
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- stejny hash = soubor uz existuje -> preskoci
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- prvni vyskytu souboru: ulozi pod puvodnimnazvem
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- kolize nazvu (stejny nazev, jiny hash): faktura_2.pdf, faktura_3.pdf ...
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Po ulozeni aktualizuje MongoDB:
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- v email dokumentu: kazda priloha dostane file_hash + local_path
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- kolekce emaily.attachments_index: _id=hash, filename, path, size_bytes,
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mime_type, mailbox, first_seen_at, ref_count
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Bezpecne prerusit a opakovat — emaily kde vsechny prilohy maji file_hash
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se preskoci. --force-recheck znovu overi i uz stazene.
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POZOR: Skript pouze CIST ze schranky — zadny zapis do schranky!
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Spousteni:
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python download_attachments_v1.3.py --mailbox ordinace@buzalkova.cz
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python download_attachments_v1.3.py --mailbox ordinace@buzalkova.cz --limit 50
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python download_attachments_v1.3.py --mailbox ordinace@buzalkova.cz --force-recheck
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Docker:
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docker exec -it python-runner python /scripts/download_attachments_v1.3.py \\
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--mailbox ordinace@buzalkova.cz
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Zavislosti:
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msal, requests, pymongo
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Python 3.10+
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Historie verzi:
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1.0 2026-06-02 Inicialni verze
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1.1 2026-06-02 Schránka jako parametr --mailbox
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1.2 2026-06-02 Oprava: Graph attachment mapa vcetne inline; normalizace nazvu;
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preskoceni S/MIME; inline z Graphu -> SKIP ne ERR
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1.3 2026-06-02 Primarni stazeni pres graph_att_id (prime ID bez name-matchingu);
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oprava $select na attachment listu (odstranen contentId ktery
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zpusoboval BadRequest a vracel prazdny seznam); name-matching
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zustava jako fallback pro stare emaily bez graph_att_id
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"""
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import sys
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import re
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import hashlib
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import logging
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import argparse
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import unicodedata
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from pathlib import Path
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from datetime import datetime, timezone
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from typing import Optional
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import msal
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import requests
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from pymongo import MongoClient, UpdateOne
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if hasattr(sys.stdout, "reconfigure"):
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sys.stdout.reconfigure(encoding="utf-8", errors="replace")
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# ─── KONFIGURACE ──────────────────────────────────────────────────────────────
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GRAPH_TENANT_ID = "7d269944-37a4-43a1-8140-c7517dc426e9"
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GRAPH_CLIENT_ID = "4b222bfd-78c9-4239-a53f-43006b3ed07f"
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GRAPH_CLIENT_SECRET = "Txg8Q~MjhocuopxsJyJBhPmDfMxZ2r5WpTFj1dfk"
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GRAPH_URL = "https://graph.microsoft.com/v1.0"
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MONGO_URI = "mongodb://192.168.1.76:27017"
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MONGO_DB = "emaily"
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MONGO_COL_INDEX = "attachments_index"
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EMAILS_BASE_DIR = Path("/mnt/Emails")
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LOG_FILE = Path(__file__).parent / "parse_emails_errors.log"
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SCRIPT_VERSION = "1.3"
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BATCH_SIZE = 50
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# Typy příloh které přeskočíme (S/MIME podpisy, certifikáty)
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SKIP_EXTENSIONS = {".p7m", ".p7s", ".p7c", ".p7b"}
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# ──────────────────────────────────────────────────────────────────────────────
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logging.basicConfig(
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filename=str(LOG_FILE),
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level=logging.ERROR,
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format="%(asctime)s | %(message)s",
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datefmt="%Y-%m-%d %H:%M:%S",
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encoding="utf-8",
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)
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_graph_token: Optional[str] = None
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# ─── Graph API ────────────────────────────────────────────────────────────────
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def get_token() -> str:
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global _graph_token
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app = msal.ConfidentialClientApplication(
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GRAPH_CLIENT_ID,
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authority=f"https://login.microsoftonline.com/{GRAPH_TENANT_ID}",
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client_credential=GRAPH_CLIENT_SECRET,
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)
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result = app.acquire_token_for_client(scopes=["https://graph.microsoft.com/.default"])
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if "access_token" not in result:
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raise RuntimeError(f"Graph auth failed: {result}")
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_graph_token = result["access_token"]
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return _graph_token
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def graph_get_bytes(url: str) -> bytes:
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global _graph_token
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if not _graph_token:
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get_token()
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for attempt in range(2):
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r = requests.get(url, headers={"Authorization": f"Bearer {_graph_token}"}, timeout=120, stream=True)
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if r.status_code == 401:
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get_token()
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continue
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r.raise_for_status()
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return r.content
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raise RuntimeError(f"Graph GET bytes failed: {url}")
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def graph_get_json(url: str, params: dict = None) -> dict:
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global _graph_token
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if not _graph_token:
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get_token()
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for attempt in range(2):
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r = requests.get(url, headers={"Authorization": f"Bearer {_graph_token}"}, params=params, timeout=30)
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if r.status_code == 401:
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get_token()
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continue
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r.raise_for_status()
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return r.json()
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raise RuntimeError(f"Graph GET json failed: {url}")
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def fetch_message_attachments(mailbox: str, graph_message_id: str) -> list[dict]:
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"""Nacte metadata vsech priloh zpravy (bez contentBytes)."""
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url = f"{GRAPH_URL}/users/{mailbox}/messages/{graph_message_id}/attachments"
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try:
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# Pozor: contentId NENI v base attachment type — nesmi byt v $select
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data = graph_get_json(url, {"$select": "id,name,contentType,size,isInline"})
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return data.get("value", [])
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except Exception as e:
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logging.error("fetch_message_attachments failed [%s]: %s", graph_message_id, e)
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return []
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def fetch_attachment_content(mailbox: str, graph_message_id: str, attachment_id: str) -> Optional[bytes]:
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url = f"{GRAPH_URL}/users/{mailbox}/messages/{graph_message_id}/attachments/{attachment_id}/$value"
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try:
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return graph_get_bytes(url)
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except Exception as e:
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logging.error("fetch_attachment_content failed [msg=%s att=%s]: %s",
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graph_message_id, attachment_id, e)
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return None
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# ─── Pomocné funkce ───────────────────────────────────────────────────────────
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def normalize_name(name: str) -> str:
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"""Normalizuje název pro porovnání — lowercase, bez diakritiky, jen alnum+._-"""
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nfkd = unicodedata.normalize("NFKD", name.lower().strip())
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ascii_str = "".join(c for c in nfkd if not unicodedata.combining(c))
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return re.sub(r"[^\w.\-]", "_", ascii_str)
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def find_graph_att(att_name: str, att_size: int, graph_atts: list[dict]) -> Optional[dict]:
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"""Fallback: hleda prilohu v Graph listu podle jmena (pro emaily bez graph_att_id)."""
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# 1. Presna shoda
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for ga in graph_atts:
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if ga["name"] == att_name:
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return ga
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norm_want = normalize_name(att_name)
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# 2. Normalizovana shoda
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for ga in graph_atts:
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if normalize_name(ga["name"]) == norm_want:
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return ga
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# 3. Normalizovana shoda + velikost (±10 %)
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for ga in graph_atts:
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if normalize_name(ga["name"]) == norm_want:
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ga_size = ga.get("size", 0)
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if att_size == 0 or ga_size == 0 or abs(ga_size - att_size) / max(ga_size, att_size) < 0.1:
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return ga
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# 4. Castecna shoda sufixu (posledních 20 znaků normalizovaného jména)
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for ga in graph_atts:
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if norm_want[-20:] and normalize_name(ga["name"]).endswith(norm_want[-20:]):
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return ga
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return None
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def sha256(data: bytes) -> str:
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return hashlib.sha256(data).hexdigest()
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def safe_filename(name: str) -> str:
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safe = "".join(c if c.isalnum() or c in "._- ()" else "_" for c in name).strip()
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return safe or "attachment"
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def resolve_filename(desired_name: str, att_dir: Path, hash_val: str, col_index) -> str:
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existing = col_index.find_one({"filename": desired_name})
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if existing:
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if existing["_id"] == hash_val:
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return desired_name
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stem = Path(desired_name).stem
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suffix = Path(desired_name).suffix
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n = 2
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while True:
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candidate = f"{stem}_{n}{suffix}"
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ex2 = col_index.find_one({"filename": candidate})
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if not ex2 or ex2["_id"] == hash_val:
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if not (att_dir / candidate).exists() or (ex2 and ex2["_id"] == hash_val):
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return candidate
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n += 1
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return desired_name
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def save_attachment(
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content: bytes,
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original_name: str,
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mime_type: str,
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mailbox: str,
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att_dir: Path,
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col_index,
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) -> tuple[str, str, bool]:
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hash_val = sha256(content)
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existing = col_index.find_one({"_id": hash_val})
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if existing:
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col_index.update_one({"_id": hash_val}, {"$inc": {"ref_count": 1}})
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return hash_val, existing["local_path"], False
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filename = resolve_filename(safe_filename(original_name), att_dir, hash_val, col_index)
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file_path = att_dir / filename
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file_path.write_bytes(content)
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col_index.insert_one({
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"_id": hash_val,
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"filename": filename,
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"local_path": filename,
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"size_bytes": len(content),
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"mime_type": mime_type,
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"mailbox": mailbox,
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"first_seen_at": datetime.now(timezone.utc).replace(tzinfo=None),
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"ref_count": 1,
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})
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return hash_val, filename, True
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# ─── MAIN ─────────────────────────────────────────────────────────────────────
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def main():
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ap = argparse.ArgumentParser(description=f"download_attachments v{SCRIPT_VERSION}")
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ap.add_argument("--mailbox", required=True,
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help="Emailova schranka (napr. ordinace@buzalkova.cz)")
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ap.add_argument("--limit", type=int, default=0,
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help="Zpracovat max N emailu (0 = vse)")
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ap.add_argument("--force-recheck", action="store_true",
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help="Znovu overi i emaily kde prilohy uz maji file_hash")
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ap.add_argument("--no-indexes", action="store_true",
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help="Nevytvorit indexy na attachments_index kolekci")
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args = ap.parse_args()
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mailbox = args.mailbox
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att_dir = EMAILS_BASE_DIR / mailbox / "Attachments"
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mongo_col = mailbox
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start = datetime.now()
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print(f"=== download_attachments v{SCRIPT_VERSION} ===")
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print(f"Start: {start.strftime('%Y-%m-%d %H:%M:%S')}")
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print(f"Schránka: {mailbox}")
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print(f"Cilovy adresar: {att_dir}")
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print(f"MongoDB: {MONGO_URI} -> {MONGO_DB}.{mongo_col}")
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att_dir.mkdir(parents=True, exist_ok=True)
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print(" Adresar OK")
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print("\nPřipojuji se k Graph API...")
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try:
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get_token()
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print(" Graph API OK")
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except Exception as e:
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print(f" CHYBA: {e}")
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sys.exit(1)
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client = MongoClient(MONGO_URI, serverSelectionTimeoutMS=5000)
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try:
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client.admin.command("ping")
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print(" MongoDB OK")
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except Exception as e:
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print(f" CHYBA: MongoDB neni dostupna -- {e}")
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sys.exit(1)
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col_emails = client[MONGO_DB][mongo_col]
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col_index = client[MONGO_DB][MONGO_COL_INDEX]
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if not args.no_indexes:
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col_index.create_index("filename")
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col_index.create_index("mime_type")
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col_index.create_index("mailbox")
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if args.force_recheck:
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query = {"has_attachments": True}
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else:
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query = {
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"has_attachments": True,
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"attachments": {
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"$elemMatch": {
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"is_inline": False,
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"file_hash": {"$exists": False},
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}
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}
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}
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total = col_emails.count_documents(query)
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print(f"\nEmailu ke zpracovani: {total}")
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if total == 0:
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print("Neni co stahnout.")
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client.close()
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return
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cursor = col_emails.find(query, {"_id": 1, "graph_id": 1, "subject": 1, "attachments": 1})
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if args.limit:
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cursor = cursor.limit(args.limit)
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ok_count = 0
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new_count = 0
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dup_count = 0
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skip_count = 0
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err_count = 0
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email_i = 0
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batch = []
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def flush():
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if not batch:
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return
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try:
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col_emails.bulk_write(batch, ordered=False)
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except Exception as e:
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logging.error("bulk_write: %s", e)
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print(f" CHYBA bulk_write: {e}")
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batch.clear()
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for email_doc in cursor:
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email_i += 1
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email_id = email_doc["_id"]
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graph_id = email_doc.get("graph_id", "")
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subject = (email_doc.get("subject") or "")[:60]
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att_list = email_doc.get("attachments") or []
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real_atts = [a for a in att_list if not a.get("is_inline", False)]
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if not real_atts:
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continue
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print(f"\n {email_i:>5}/{total} {subject}")
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# Nacti attachment list z Graphu jen pokud nektere prilohy nemaji graph_att_id
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need_listing = any(
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not a.get("is_inline", False)
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and not (not args.force_recheck and a.get("file_hash"))
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and not a.get("graph_att_id")
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for a in att_list
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)
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graph_atts = fetch_message_attachments(mailbox, graph_id) if need_listing else []
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updated_atts = list(att_list)
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email_ok = True
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for i, att in enumerate(updated_atts):
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if att.get("is_inline", False):
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continue
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if not args.force_recheck and att.get("file_hash"):
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continue
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att_name = att.get("filename", "")
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att_size = att.get("size_bytes", 0)
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graph_att_id = att.get("graph_att_id")
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# Preskoc S/MIME podpisy
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if Path(att_name).suffix.lower() in SKIP_EXTENSIONS:
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updated_atts[i] = {**att, "file_hash": "skip", "local_path": ""}
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skip_count += 1
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print(f" SKIP {att_name} (S/MIME)")
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continue
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# Primy pristup pres graph_att_id (emaily parsovane v1.2+)
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if graph_att_id:
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content = fetch_attachment_content(mailbox, graph_id, graph_att_id)
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if content is None:
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err_count += 1
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email_ok = False
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print(f" ERR {att_name} (stazeni selhalo)")
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continue
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# Zkontroluj zda jde skutecne o inline (pro edge case)
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mime_type = att.get("mime_type", "")
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else:
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# Fallback: name matching pro stare emaily (parsovane pred v1.2)
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graph_att = find_graph_att(att_name, att_size, graph_atts)
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if not graph_att:
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logging.error("attachment not found [email=%s att=%s]", email_id, att_name)
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print(f" ERR {att_name} (nenalezeno)")
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err_count += 1
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email_ok = False
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continue
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# Pokud Graph rika ze je inline — preskoc
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if graph_att.get("isInline", False):
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updated_atts[i] = {**att, "is_inline": True, "file_hash": "skip", "local_path": ""}
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skip_count += 1
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print(f" SKIP {att_name} (inline obrazek)")
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continue
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content = fetch_attachment_content(mailbox, graph_id, graph_att["id"])
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if content is None:
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err_count += 1
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email_ok = False
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print(f" ERR {att_name} (stazeni selhalo)")
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continue
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mime_type = att.get("mime_type") or graph_att.get("contentType", "")
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hash_val, local_path, was_new = save_attachment(
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content, att_name, mime_type, mailbox, att_dir, col_index
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)
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updated_atts[i] = {**att, "file_hash": hash_val, "local_path": local_path}
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if was_new:
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new_count += 1
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print(f" NEW {local_path} ({len(content):,} B)")
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else:
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dup_count += 1
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print(f" DUP {att_name} -> {local_path}")
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if email_ok:
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ok_count += 1
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batch.append(UpdateOne({"_id": email_id}, {"$set": {"attachments": updated_atts}}))
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if len(batch) >= BATCH_SIZE:
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flush()
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if email_i % 100 == 0:
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elapsed = (datetime.now() - start).total_seconds()
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print(f" {'─'*60}")
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print(f" Průběh: emaily={email_i}/{total} nove={new_count} dup={dup_count} skip={skip_count} err={err_count}")
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print(f" {'─'*60}")
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flush()
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elapsed_total = (datetime.now() - start).total_seconds()
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files_total = col_index.count_documents({})
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size_total = sum(d.get("size_bytes", 0) for d in col_index.find({}, {"size_bytes": 1}))
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print(f"\n{'='*52}")
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print(f"Vysledek: emaily={ok_count} | nove={new_count} | dup={dup_count} | skip={skip_count} | err={err_count}")
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print(f"Souboru v indexu: {files_total} ({size_total / 1024 / 1024:.1f} MB)")
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print(f"Celkovy cas: {int(elapsed_total//3600)}h {int((elapsed_total%3600)//60)}m {int(elapsed_total%60)}s")
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print(f"\nKonec: {datetime.now().strftime('%Y-%m-%d %H:%M:%S')}")
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if err_count:
|
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print(f"Chyby logovany do: {LOG_FILE}")
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|
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client.close()
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if __name__ == "__main__":
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main()
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