mirror of https://github.com/jackwener/wx-cli.git
1739 lines
58 KiB
Python
1739 lines
58 KiB
Python
r"""
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||
WeChat MCP Server - query WeChat messages, contacts via Claude
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Based on FastMCP (stdio transport), reuses existing decryption.
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Runs on Windows Python (needs access to D:\ WeChat databases).
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"""
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import os, sys, json, time, sqlite3, tempfile, struct, hashlib, atexit, re
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import hmac as hmac_mod
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from contextlib import closing
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from datetime import datetime
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import xml.etree.ElementTree as ET
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from Crypto.Cipher import AES
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from mcp.server.fastmcp import FastMCP
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import zstandard as zstd
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from decode_image import ImageResolver
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from key_utils import get_key_info, key_path_variants, strip_key_metadata
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# ============ 加密常量 ============
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PAGE_SZ = 4096
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KEY_SZ = 32
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SALT_SZ = 16
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RESERVE_SZ = 80
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SQLITE_HDR = b'SQLite format 3\x00'
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WAL_HEADER_SZ = 32
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WAL_FRAME_HEADER_SZ = 24
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# ============ 配置加载 ============
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SCRIPT_DIR = os.path.dirname(os.path.abspath(__file__))
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CONFIG_FILE = os.path.join(SCRIPT_DIR, "config.json")
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with open(CONFIG_FILE, encoding="utf-8") as f:
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_cfg = json.load(f)
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for _key in ("keys_file", "decrypted_dir"):
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if _key in _cfg and not os.path.isabs(_cfg[_key]):
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_cfg[_key] = os.path.join(SCRIPT_DIR, _cfg[_key])
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DB_DIR = _cfg["db_dir"]
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KEYS_FILE = _cfg["keys_file"]
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DECRYPTED_DIR = _cfg["decrypted_dir"]
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# 图片相关路径
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_db_dir = _cfg["db_dir"]
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if os.path.basename(_db_dir) == "db_storage":
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WECHAT_BASE_DIR = os.path.dirname(_db_dir)
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else:
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WECHAT_BASE_DIR = _db_dir
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DECODED_IMAGE_DIR = _cfg.get("decoded_image_dir")
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if not DECODED_IMAGE_DIR:
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DECODED_IMAGE_DIR = os.path.join(SCRIPT_DIR, "decoded_images")
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elif not os.path.isabs(DECODED_IMAGE_DIR):
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DECODED_IMAGE_DIR = os.path.join(SCRIPT_DIR, DECODED_IMAGE_DIR)
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with open(KEYS_FILE, encoding="utf-8") as f:
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ALL_KEYS = strip_key_metadata(json.load(f))
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# ============ 解密函数 ============
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def decrypt_page(enc_key, page_data, pgno):
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iv = page_data[PAGE_SZ - RESERVE_SZ : PAGE_SZ - RESERVE_SZ + 16]
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if pgno == 1:
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encrypted = page_data[SALT_SZ : PAGE_SZ - RESERVE_SZ]
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cipher = AES.new(enc_key, AES.MODE_CBC, iv)
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decrypted = cipher.decrypt(encrypted)
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return bytes(bytearray(SQLITE_HDR + decrypted + b'\x00' * RESERVE_SZ))
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else:
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encrypted = page_data[: PAGE_SZ - RESERVE_SZ]
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cipher = AES.new(enc_key, AES.MODE_CBC, iv)
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decrypted = cipher.decrypt(encrypted)
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return decrypted + b'\x00' * RESERVE_SZ
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def full_decrypt(db_path, out_path, enc_key):
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file_size = os.path.getsize(db_path)
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total_pages = file_size // PAGE_SZ
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os.makedirs(os.path.dirname(out_path), exist_ok=True)
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with open(db_path, 'rb') as fin, open(out_path, 'wb') as fout:
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for pgno in range(1, total_pages + 1):
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page = fin.read(PAGE_SZ)
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if len(page) < PAGE_SZ:
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if len(page) > 0:
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page = page + b'\x00' * (PAGE_SZ - len(page))
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else:
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break
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fout.write(decrypt_page(enc_key, page, pgno))
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return total_pages
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def decrypt_wal(wal_path, out_path, enc_key):
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if not os.path.exists(wal_path):
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return 0
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wal_size = os.path.getsize(wal_path)
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if wal_size <= WAL_HEADER_SZ:
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return 0
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frame_size = WAL_FRAME_HEADER_SZ + PAGE_SZ
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patched = 0
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with open(wal_path, 'rb') as wf, open(out_path, 'r+b') as df:
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wal_hdr = wf.read(WAL_HEADER_SZ)
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wal_salt1 = struct.unpack('>I', wal_hdr[16:20])[0]
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wal_salt2 = struct.unpack('>I', wal_hdr[20:24])[0]
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while wf.tell() + frame_size <= wal_size:
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fh = wf.read(WAL_FRAME_HEADER_SZ)
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if len(fh) < WAL_FRAME_HEADER_SZ:
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break
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pgno = struct.unpack('>I', fh[0:4])[0]
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frame_salt1 = struct.unpack('>I', fh[8:12])[0]
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frame_salt2 = struct.unpack('>I', fh[12:16])[0]
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ep = wf.read(PAGE_SZ)
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if len(ep) < PAGE_SZ:
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break
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if pgno == 0 or pgno > 1000000:
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continue
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if frame_salt1 != wal_salt1 or frame_salt2 != wal_salt2:
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continue
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dec = decrypt_page(enc_key, ep, pgno)
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df.seek((pgno - 1) * PAGE_SZ)
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df.write(dec)
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patched += 1
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return patched
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# ============ DB 缓存 ============
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class DBCache:
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"""缓存解密后的 DB，通过 mtime 检测变化。使用固定文件名，重启后可复用。"""
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CACHE_DIR = os.path.join(tempfile.gettempdir(), "wechat_mcp_cache")
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MTIME_FILE = os.path.join(tempfile.gettempdir(), "wechat_mcp_cache", "_mtimes.json")
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def __init__(self):
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self._cache = {} # rel_key -> (db_mtime, wal_mtime, tmp_path)
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os.makedirs(self.CACHE_DIR, exist_ok=True)
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self._load_persistent_cache()
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def _cache_path(self, rel_key):
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"""rel_key -> 固定的缓存文件路径"""
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h = hashlib.md5(rel_key.encode()).hexdigest()[:12]
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return os.path.join(self.CACHE_DIR, f"{h}.db")
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def _load_persistent_cache(self):
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"""启动时从磁盘恢复缓存映射，验证 mtime 后复用"""
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if not os.path.exists(self.MTIME_FILE):
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return
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try:
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with open(self.MTIME_FILE, encoding="utf-8") as f:
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saved = json.load(f)
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except (json.JSONDecodeError, OSError):
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return
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reused = 0
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for rel_key, info in saved.items():
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tmp_path = info["path"]
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if not os.path.exists(tmp_path):
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continue
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rel_path = rel_key.replace('\\', os.sep)
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db_path = os.path.join(DB_DIR, rel_path)
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wal_path = db_path + "-wal"
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try:
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db_mtime = os.path.getmtime(db_path)
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wal_mtime = os.path.getmtime(wal_path) if os.path.exists(wal_path) else 0
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except OSError:
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continue
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if db_mtime == info["db_mt"] and wal_mtime == info["wal_mt"]:
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self._cache[rel_key] = (db_mtime, wal_mtime, tmp_path)
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reused += 1
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if reused:
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print(f"[DBCache] reused {reused} cached decrypted DBs from previous run", flush=True)
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def _save_persistent_cache(self):
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"""持久化缓存映射到磁盘"""
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data = {}
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for rel_key, (db_mt, wal_mt, path) in self._cache.items():
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data[rel_key] = {"db_mt": db_mt, "wal_mt": wal_mt, "path": path}
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try:
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with open(self.MTIME_FILE, 'w', encoding="utf-8") as f:
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json.dump(data, f)
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except OSError:
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pass
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def get(self, rel_key):
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key_info = get_key_info(ALL_KEYS, rel_key)
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if not key_info:
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return None
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rel_path = rel_key.replace('\\', '/').replace('/', os.sep)
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db_path = os.path.join(DB_DIR, rel_path)
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wal_path = db_path + "-wal"
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if not os.path.exists(db_path):
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return None
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try:
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db_mtime = os.path.getmtime(db_path)
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wal_mtime = os.path.getmtime(wal_path) if os.path.exists(wal_path) else 0
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except OSError:
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return None
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if rel_key in self._cache:
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c_db_mt, c_wal_mt, c_path = self._cache[rel_key]
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if c_db_mt == db_mtime and c_wal_mt == wal_mtime and os.path.exists(c_path):
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return c_path
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tmp_path = self._cache_path(rel_key)
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enc_key = bytes.fromhex(key_info["enc_key"])
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full_decrypt(db_path, tmp_path, enc_key)
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if os.path.exists(wal_path):
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decrypt_wal(wal_path, tmp_path, enc_key)
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self._cache[rel_key] = (db_mtime, wal_mtime, tmp_path)
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self._save_persistent_cache()
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return tmp_path
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def cleanup(self):
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"""正常退出时保存缓存映射（不删文件，下次启动可复用）"""
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self._save_persistent_cache()
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_cache = DBCache()
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atexit.register(_cache.cleanup)
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# ============ 联系人缓存 ============
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_contact_names = None # {username: display_name}
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_contact_full = None # [{username, nick_name, remark}]
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_contact_tags = None # {label_id: {name, sort_order, members: [{username, display_name}]}}
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_self_username = None
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_XML_UNSAFE_RE = re.compile(r'<!DOCTYPE|<!ENTITY', re.IGNORECASE)
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_XML_PARSE_MAX_LEN = 20000
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_QUERY_LIMIT_MAX = 500
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_HISTORY_QUERY_BATCH_SIZE = 500
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def _load_contacts_from(db_path):
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names = {}
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full = []
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conn = sqlite3.connect(db_path)
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try:
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for r in conn.execute("SELECT username, nick_name, remark FROM contact").fetchall():
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uname, nick, remark = r
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display = remark if remark else nick if nick else uname
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names[uname] = display
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full.append({'username': uname, 'nick_name': nick or '', 'remark': remark or ''})
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finally:
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conn.close()
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return names, full
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def get_contact_names():
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global _contact_names, _contact_full
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if _contact_names is not None:
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return _contact_names
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# 优先用已解密的 contact.db
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pre_decrypted = os.path.join(DECRYPTED_DIR, "contact", "contact.db")
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if os.path.exists(pre_decrypted):
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try:
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_contact_names, _contact_full = _load_contacts_from(pre_decrypted)
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return _contact_names
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except Exception:
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pass
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# 实时解密
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path = _cache.get(os.path.join("contact", "contact.db"))
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if path:
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try:
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_contact_names, _contact_full = _load_contacts_from(path)
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return _contact_names
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except Exception:
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||
pass
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||
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||
return {}
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||
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||
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||
def get_contact_full():
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global _contact_full
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if _contact_full is None:
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||
get_contact_names()
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return _contact_full or []
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||
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||
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||
def _get_contact_db_path():
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||
"""获取 contact.db 路径（优先已解密，其次实时解密）"""
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pre = os.path.join(DECRYPTED_DIR, "contact", "contact.db")
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if os.path.exists(pre):
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||
return pre
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||
return _cache.get(os.path.join("contact", "contact.db"))
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||
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||
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def _extract_pb_field_30(data):
|
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"""从 extra_buffer (protobuf) 中提取 Field #30 的字符串值（联系人标签ID）"""
|
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if not data:
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return None
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pos = 0
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n = len(data)
|
||
while pos < n:
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||
# 读 varint tag
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||
tag = 0
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||
shift = 0
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||
while pos < n:
|
||
b = data[pos]; pos += 1
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||
tag |= (b & 0x7f) << shift
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if not (b & 0x80):
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||
break
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||
shift += 7
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||
field_num = tag >> 3
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||
wire_type = tag & 0x07
|
||
if wire_type == 0: # varint
|
||
while pos < n and data[pos] & 0x80:
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||
pos += 1
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||
pos += 1
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||
elif wire_type == 2: # length-delimited
|
||
length = 0; shift = 0
|
||
while pos < n:
|
||
b = data[pos]; pos += 1
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||
length |= (b & 0x7f) << shift
|
||
if not (b & 0x80):
|
||
break
|
||
shift += 7
|
||
if field_num == 30:
|
||
try:
|
||
return data[pos:pos + length].decode('utf-8')
|
||
except Exception:
|
||
return None
|
||
pos += length
|
||
elif wire_type == 1: # 64-bit
|
||
pos += 8
|
||
elif wire_type == 5: # 32-bit
|
||
pos += 4
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||
else:
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||
break
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||
return None
|
||
|
||
|
||
def _load_contact_tags():
|
||
"""加载并缓存联系人标签数据"""
|
||
global _contact_tags
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||
if _contact_tags is not None:
|
||
return _contact_tags
|
||
|
||
db_path = _get_contact_db_path()
|
||
if not db_path:
|
||
return {}
|
||
|
||
try:
|
||
conn = sqlite3.connect(db_path)
|
||
except Exception:
|
||
return {}
|
||
|
||
try:
|
||
# 1. 加载标签定义
|
||
try:
|
||
label_rows = conn.execute(
|
||
"SELECT label_id_, label_name_, sort_order_ FROM contact_label ORDER BY sort_order_"
|
||
).fetchall()
|
||
except sqlite3.OperationalError:
|
||
return {}
|
||
if not label_rows:
|
||
return {}
|
||
|
||
labels = {}
|
||
for lid, lname, sort_order in label_rows:
|
||
labels[lid] = {'name': lname, 'sort_order': sort_order, 'members': []}
|
||
|
||
# 2. 扫描联系人的标签关联
|
||
names = get_contact_names()
|
||
rows = conn.execute(
|
||
"SELECT username, extra_buffer FROM contact WHERE extra_buffer IS NOT NULL"
|
||
).fetchall()
|
||
|
||
for username, buf in rows:
|
||
label_str = _extract_pb_field_30(buf)
|
||
if not label_str:
|
||
continue
|
||
display = names.get(username, username)
|
||
for lid_s in label_str.split(','):
|
||
try:
|
||
lid = int(lid_s.strip())
|
||
except (ValueError, AttributeError):
|
||
continue
|
||
if lid in labels:
|
||
labels[lid]['members'].append({'username': username, 'display_name': display})
|
||
|
||
_contact_tags = labels
|
||
return _contact_tags
|
||
except Exception:
|
||
return {}
|
||
finally:
|
||
conn.close()
|
||
|
||
|
||
# ============ 辅助函数 ============
|
||
|
||
def format_msg_type(t):
|
||
base_type, _ = _split_msg_type(t)
|
||
return {
|
||
1: '文本', 3: '图片', 34: '语音', 42: '名片',
|
||
43: '视频', 47: '表情', 48: '位置', 49: '链接/文件',
|
||
50: '通话', 10000: '系统', 10002: '撤回',
|
||
}.get(base_type, f'type={t}')
|
||
|
||
|
||
def _split_msg_type(t):
|
||
try:
|
||
t = int(t)
|
||
except (TypeError, ValueError):
|
||
return 0, 0
|
||
# WeChat packs the base type into the low 32 bits and app subtype into the high 32 bits.
|
||
if t > 0xFFFFFFFF:
|
||
return t & 0xFFFFFFFF, t >> 32
|
||
return t, 0
|
||
|
||
|
||
def resolve_username(chat_name):
|
||
"""将聊天名/备注名/wxid 解析为 username"""
|
||
names = get_contact_names()
|
||
|
||
# 直接是 username
|
||
if chat_name in names or chat_name.startswith('wxid_') or '@chatroom' in chat_name:
|
||
return chat_name
|
||
|
||
# 模糊匹配(优先精确包含)
|
||
chat_lower = chat_name.lower()
|
||
for uname, display in names.items():
|
||
if chat_lower == display.lower():
|
||
return uname
|
||
for uname, display in names.items():
|
||
if chat_lower in display.lower():
|
||
return uname
|
||
|
||
return None
|
||
|
||
|
||
_zstd_dctx = zstd.ZstdDecompressor()
|
||
|
||
|
||
def _decompress_content(content, ct):
|
||
"""解压 zstd 压缩的消息内容"""
|
||
if ct and ct == 4 and isinstance(content, bytes):
|
||
try:
|
||
return _zstd_dctx.decompress(content).decode('utf-8', errors='replace')
|
||
except Exception:
|
||
return None
|
||
if isinstance(content, bytes):
|
||
try:
|
||
return content.decode('utf-8', errors='replace')
|
||
except Exception:
|
||
return None
|
||
return content
|
||
|
||
|
||
def _parse_message_content(content, local_type, is_group):
|
||
"""解析消息内容，返回 (sender_id, text)"""
|
||
if content is None:
|
||
return '', ''
|
||
if isinstance(content, bytes):
|
||
return '', '(二进制内容)'
|
||
|
||
sender = ''
|
||
text = content
|
||
if is_group and ':\n' in content:
|
||
sender, text = content.split(':\n', 1)
|
||
|
||
return sender, text
|
||
|
||
|
||
def _collapse_text(text):
|
||
if not text:
|
||
return ''
|
||
return re.sub(r'\s+', ' ', text).strip()
|
||
|
||
|
||
def _get_self_username():
|
||
global _self_username
|
||
if _self_username:
|
||
return _self_username
|
||
|
||
if not DB_DIR:
|
||
return ''
|
||
|
||
names = get_contact_names()
|
||
account_dir = os.path.basename(os.path.dirname(DB_DIR))
|
||
candidates = [account_dir]
|
||
|
||
m = re.fullmatch(r'(.+)_([0-9a-fA-F]{4,})', account_dir)
|
||
if m:
|
||
candidates.insert(0, m.group(1))
|
||
|
||
for candidate in candidates:
|
||
if candidate and candidate in names:
|
||
_self_username = candidate
|
||
return _self_username
|
||
|
||
return ''
|
||
|
||
|
||
def _load_name2id_maps(conn):
|
||
id_to_username = {}
|
||
try:
|
||
rows = conn.execute("SELECT rowid, user_name FROM Name2Id").fetchall()
|
||
except sqlite3.Error:
|
||
return id_to_username
|
||
|
||
for rowid, user_name in rows:
|
||
if not user_name:
|
||
continue
|
||
id_to_username[rowid] = user_name
|
||
return id_to_username
|
||
|
||
|
||
def _display_name_for_username(username, names):
|
||
if not username:
|
||
return ''
|
||
if username == _get_self_username():
|
||
return 'me'
|
||
return names.get(username, username)
|
||
|
||
|
||
def _resolve_sender_label(real_sender_id, sender_from_content, is_group, chat_username, chat_display_name, names, id_to_username):
|
||
sender_username = id_to_username.get(real_sender_id, '')
|
||
|
||
if is_group:
|
||
if sender_username and sender_username != chat_username:
|
||
return _display_name_for_username(sender_username, names)
|
||
if sender_from_content:
|
||
return _display_name_for_username(sender_from_content, names)
|
||
return ''
|
||
|
||
if sender_username == chat_username:
|
||
return chat_display_name
|
||
if sender_username:
|
||
return _display_name_for_username(sender_username, names)
|
||
return ''
|
||
|
||
|
||
def _resolve_quote_sender_label(ref_user, ref_display_name, is_group, chat_username, chat_display_name, names):
|
||
if is_group:
|
||
if ref_user:
|
||
return _display_name_for_username(ref_user, names)
|
||
return ref_display_name or ''
|
||
|
||
self_username = _get_self_username()
|
||
if ref_user:
|
||
if ref_user == chat_username:
|
||
return chat_display_name
|
||
if self_username and ref_user == self_username:
|
||
return 'me'
|
||
return names.get(ref_user, ref_display_name or ref_user)
|
||
if ref_display_name:
|
||
if ref_display_name == chat_display_name:
|
||
return chat_display_name
|
||
self_display_name = names.get(self_username, self_username) if self_username else ''
|
||
if self_display_name and ref_display_name == self_display_name:
|
||
return 'me'
|
||
return ref_display_name
|
||
return ''
|
||
|
||
|
||
def _parse_xml_root(content):
|
||
if not content or len(content) > _XML_PARSE_MAX_LEN or _XML_UNSAFE_RE.search(content):
|
||
return None
|
||
|
||
try:
|
||
return ET.fromstring(content)
|
||
except ET.ParseError:
|
||
return None
|
||
|
||
|
||
def _parse_int(value, fallback=0):
|
||
try:
|
||
return int(value)
|
||
except (TypeError, ValueError):
|
||
return fallback
|
||
|
||
|
||
def _format_app_message_text(content, local_type, is_group, chat_username, chat_display_name, names):
|
||
if not content or '<appmsg' not in content:
|
||
return None
|
||
|
||
_, sub_type = _split_msg_type(local_type)
|
||
root = _parse_xml_root(content)
|
||
if root is None:
|
||
return None
|
||
|
||
appmsg = root.find('.//appmsg')
|
||
if appmsg is None:
|
||
return None
|
||
|
||
title = _collapse_text(appmsg.findtext('title') or '')
|
||
app_type_text = (appmsg.findtext('type') or '').strip()
|
||
app_type = _parse_int(app_type_text, _parse_int(sub_type, 0))
|
||
|
||
if app_type == 57:
|
||
ref = appmsg.find('.//refermsg')
|
||
ref_user = ''
|
||
ref_display_name = ''
|
||
ref_content = ''
|
||
if ref is not None:
|
||
ref_user = (ref.findtext('fromusr') or '').strip()
|
||
ref_display_name = (ref.findtext('displayname') or '').strip()
|
||
ref_content = _collapse_text(ref.findtext('content') or '')
|
||
if len(ref_content) > 160:
|
||
ref_content = ref_content[:160] + "..."
|
||
|
||
quote_text = title or "[引用消息]"
|
||
if ref_content:
|
||
ref_label = _resolve_quote_sender_label(
|
||
ref_user, ref_display_name, is_group, chat_username, chat_display_name, names
|
||
)
|
||
prefix = f"回复 {ref_label}: " if ref_label else "回复: "
|
||
quote_text += f"\n ↳ {prefix}{ref_content}"
|
||
return quote_text
|
||
|
||
if app_type == 6:
|
||
return f"[文件] {title}" if title else "[文件]"
|
||
if app_type == 5:
|
||
return f"[链接] {title}" if title else "[链接]"
|
||
if app_type in (33, 36, 44):
|
||
return f"[小程序] {title}" if title else "[小程序]"
|
||
if title:
|
||
return f"[链接/文件] {title}"
|
||
return "[链接/文件]"
|
||
|
||
|
||
def _format_voip_message_text(content):
|
||
if not content or '<voip' not in content:
|
||
return None
|
||
|
||
root = _parse_xml_root(content)
|
||
if root is None:
|
||
return "[通话]"
|
||
|
||
raw_text = _collapse_text(root.findtext('.//msg') or '')
|
||
if not raw_text:
|
||
return "[通话]"
|
||
|
||
status_map = {
|
||
'Canceled': '已取消',
|
||
'Line busy': '对方忙线',
|
||
'Already answered elsewhere': '已在其他设备接听',
|
||
'Declined on other device': '已在其他设备拒接',
|
||
'Call canceled by caller': '主叫已取消',
|
||
'Call not answered': '未接听',
|
||
"Call wasn't answered": '未接听',
|
||
}
|
||
|
||
if raw_text.startswith('Duration:'):
|
||
duration = raw_text.split(':', 1)[1].strip()
|
||
return f"[通话] 通话时长 {duration}" if duration else "[通话]"
|
||
|
||
return f"[通话] {status_map.get(raw_text, raw_text)}"
|
||
|
||
|
||
def _format_message_text(local_id, local_type, content, is_group, chat_username, chat_display_name, names):
|
||
sender_from_content, text = _parse_message_content(content, local_type, is_group)
|
||
base_type, _ = _split_msg_type(local_type)
|
||
|
||
if base_type == 3:
|
||
text = f"[图片] (local_id={local_id})"
|
||
elif base_type == 47:
|
||
text = "[表情]"
|
||
elif base_type == 50:
|
||
text = _format_voip_message_text(text) or "[通话]"
|
||
elif base_type == 49:
|
||
text = _format_app_message_text(
|
||
text, local_type, is_group, chat_username, chat_display_name, names
|
||
) or "[链接/文件]"
|
||
elif base_type != 1:
|
||
type_label = format_msg_type(local_type)
|
||
text = f"[{type_label}] {text}" if text else f"[{type_label}]"
|
||
|
||
return sender_from_content, text
|
||
|
||
|
||
def _is_safe_msg_table_name(table_name):
|
||
return bool(re.fullmatch(r'Msg_[0-9a-f]{32}', table_name))
|
||
|
||
|
||
# 消息 DB 的 rel_keys
|
||
# 用 message_\d+\.db$ 匹配，自然排除 message_resource.db / message_fts_*.db
|
||
MSG_DB_KEYS = sorted([
|
||
k for k in ALL_KEYS
|
||
if any(v.startswith("message/") for v in key_path_variants(k))
|
||
and any(re.search(r"message_\d+\.db$", v) for v in key_path_variants(k))
|
||
])
|
||
|
||
|
||
def _find_msg_table_for_user(username):
|
||
"""在所有 message_N.db 中查找用户的消息表，返回 (db_path, table_name)"""
|
||
table_hash = hashlib.md5(username.encode()).hexdigest()
|
||
table_name = f"Msg_{table_hash}"
|
||
if not _is_safe_msg_table_name(table_name):
|
||
return None, None
|
||
|
||
for rel_key in MSG_DB_KEYS:
|
||
path = _cache.get(rel_key)
|
||
if not path:
|
||
continue
|
||
conn = sqlite3.connect(path)
|
||
try:
|
||
exists = conn.execute(
|
||
"SELECT 1 FROM sqlite_master WHERE type='table' AND name=?",
|
||
(table_name,)
|
||
).fetchone()
|
||
if exists:
|
||
conn.close()
|
||
return path, table_name
|
||
except Exception:
|
||
pass
|
||
finally:
|
||
conn.close()
|
||
|
||
return None, None
|
||
|
||
|
||
def _find_msg_tables_for_user(username):
|
||
"""返回用户在所有 message_N.db 中对应的消息表，按最新消息时间倒序排列。"""
|
||
table_hash = hashlib.md5(username.encode()).hexdigest()
|
||
table_name = f"Msg_{table_hash}"
|
||
if not _is_safe_msg_table_name(table_name):
|
||
return []
|
||
|
||
matches = []
|
||
for rel_key in MSG_DB_KEYS:
|
||
path = _cache.get(rel_key)
|
||
if not path:
|
||
continue
|
||
conn = sqlite3.connect(path)
|
||
try:
|
||
exists = conn.execute(
|
||
"SELECT 1 FROM sqlite_master WHERE type='table' AND name=?",
|
||
(table_name,)
|
||
).fetchone()
|
||
if not exists:
|
||
continue
|
||
max_create_time = conn.execute(
|
||
f"SELECT MAX(create_time) FROM [{table_name}]"
|
||
).fetchone()[0] or 0
|
||
matches.append({
|
||
'db_path': path,
|
||
'table_name': table_name,
|
||
'max_create_time': max_create_time,
|
||
})
|
||
except Exception:
|
||
pass
|
||
finally:
|
||
conn.close()
|
||
|
||
matches.sort(key=lambda item: item['max_create_time'], reverse=True)
|
||
return matches
|
||
|
||
|
||
def _validate_pagination(limit, offset=0, limit_max=_QUERY_LIMIT_MAX):
|
||
if limit <= 0:
|
||
raise ValueError("limit 必须大于 0")
|
||
if limit_max is not None and limit > limit_max:
|
||
raise ValueError(f"limit 不能大于 {limit_max}")
|
||
if offset < 0:
|
||
raise ValueError("offset 不能小于 0")
|
||
|
||
|
||
def _parse_time_value(value, field_name, is_end=False):
|
||
value = (value or '').strip()
|
||
if not value:
|
||
return None
|
||
|
||
formats = [
|
||
('%Y-%m-%d %H:%M:%S', False),
|
||
('%Y-%m-%d %H:%M', False),
|
||
('%Y-%m-%d', True),
|
||
]
|
||
for fmt, date_only in formats:
|
||
try:
|
||
dt = datetime.strptime(value, fmt)
|
||
if date_only and is_end:
|
||
dt = dt.replace(hour=23, minute=59, second=59)
|
||
return int(dt.timestamp())
|
||
except ValueError:
|
||
continue
|
||
|
||
raise ValueError(
|
||
f"{field_name} 格式无效: {value}。支持 YYYY-MM-DD / YYYY-MM-DD HH:MM / YYYY-MM-DD HH:MM:SS"
|
||
)
|
||
|
||
|
||
def _parse_time_range(start_time='', end_time=''):
|
||
start_ts = _parse_time_value(start_time, 'start_time', is_end=False)
|
||
end_ts = _parse_time_value(end_time, 'end_time', is_end=True)
|
||
if start_ts is not None and end_ts is not None and start_ts > end_ts:
|
||
raise ValueError('start_time 不能晚于 end_time')
|
||
return start_ts, end_ts
|
||
|
||
|
||
def _build_message_filters(start_ts=None, end_ts=None, keyword=''):
|
||
clauses = []
|
||
params = []
|
||
if start_ts is not None:
|
||
clauses.append('create_time >= ?')
|
||
params.append(start_ts)
|
||
if end_ts is not None:
|
||
clauses.append('create_time <= ?')
|
||
params.append(end_ts)
|
||
if keyword:
|
||
clauses.append('message_content LIKE ?')
|
||
params.append(f'%{keyword}%')
|
||
return clauses, params
|
||
|
||
|
||
def _query_messages(conn, table_name, start_ts=None, end_ts=None, keyword='', limit=20, offset=0):
|
||
if not _is_safe_msg_table_name(table_name):
|
||
raise ValueError(f'非法消息表名: {table_name}')
|
||
|
||
clauses, params = _build_message_filters(start_ts, end_ts, keyword)
|
||
where_sql = f"WHERE {' AND '.join(clauses)}" if clauses else ''
|
||
sql = f"""
|
||
SELECT local_id, local_type, create_time, real_sender_id, message_content,
|
||
WCDB_CT_message_content
|
||
FROM [{table_name}]
|
||
{where_sql}
|
||
ORDER BY create_time DESC
|
||
"""
|
||
if limit is None:
|
||
return conn.execute(sql, params).fetchall()
|
||
sql += "\n LIMIT ? OFFSET ?"
|
||
return conn.execute(sql, (*params, limit, offset)).fetchall()
|
||
|
||
|
||
def _resolve_chat_context(chat_name):
|
||
username = resolve_username(chat_name)
|
||
if not username:
|
||
return None
|
||
|
||
names = get_contact_names()
|
||
display_name = names.get(username, username)
|
||
message_tables = _find_msg_tables_for_user(username)
|
||
if not message_tables:
|
||
return {
|
||
'query': chat_name,
|
||
'username': username,
|
||
'display_name': display_name,
|
||
'db_path': None,
|
||
'table_name': None,
|
||
'message_tables': [],
|
||
'is_group': '@chatroom' in username,
|
||
}
|
||
|
||
primary = message_tables[0]
|
||
return {
|
||
'query': chat_name,
|
||
'username': username,
|
||
'display_name': display_name,
|
||
'db_path': primary['db_path'],
|
||
'table_name': primary['table_name'],
|
||
'message_tables': message_tables,
|
||
'is_group': '@chatroom' in username,
|
||
}
|
||
|
||
|
||
def _resolve_chat_contexts(chat_names):
|
||
if not chat_names:
|
||
raise ValueError('chat_names 不能为空')
|
||
|
||
resolved = []
|
||
unresolved = []
|
||
missing_tables = []
|
||
seen = set()
|
||
|
||
for chat_name in chat_names:
|
||
name = (chat_name or '').strip()
|
||
if not name:
|
||
unresolved.append('(空)')
|
||
continue
|
||
ctx = _resolve_chat_context(name)
|
||
if not ctx:
|
||
unresolved.append(name)
|
||
continue
|
||
if not ctx['message_tables']:
|
||
missing_tables.append(ctx['display_name'])
|
||
continue
|
||
if ctx['username'] in seen:
|
||
continue
|
||
seen.add(ctx['username'])
|
||
resolved.append(ctx)
|
||
|
||
return resolved, unresolved, missing_tables
|
||
|
||
|
||
def _normalize_chat_names(chat_name):
|
||
if chat_name is None:
|
||
return []
|
||
if isinstance(chat_name, str):
|
||
value = chat_name.strip()
|
||
return [value] if value else []
|
||
if isinstance(chat_name, (list, tuple, set)):
|
||
normalized = []
|
||
for item in chat_name:
|
||
if item is None:
|
||
continue
|
||
value = str(item).strip()
|
||
if value:
|
||
normalized.append(value)
|
||
return normalized
|
||
value = str(chat_name).strip()
|
||
return [value] if value else []
|
||
|
||
|
||
def _format_history_lines(rows, username, display_name, is_group, names, id_to_username):
|
||
lines = []
|
||
ctx = {
|
||
'username': username,
|
||
'display_name': display_name,
|
||
'is_group': is_group,
|
||
}
|
||
for row in reversed(rows):
|
||
_, line = _build_history_line(row, ctx, names, id_to_username)
|
||
lines.append(line)
|
||
return lines
|
||
|
||
|
||
def _build_search_entry(row, ctx, names, id_to_username):
|
||
local_id, local_type, create_time, real_sender_id, content, ct = row
|
||
content = _decompress_content(content, ct)
|
||
if content is None:
|
||
return None
|
||
|
||
sender, text = _format_message_text(
|
||
local_id, local_type, content, ctx['is_group'], ctx['username'], ctx['display_name'], names
|
||
)
|
||
if text and len(text) > 300:
|
||
text = text[:300] + '...'
|
||
|
||
sender_label = _resolve_sender_label(
|
||
real_sender_id,
|
||
sender,
|
||
ctx['is_group'],
|
||
ctx['username'],
|
||
ctx['display_name'],
|
||
names,
|
||
id_to_username,
|
||
)
|
||
time_str = datetime.fromtimestamp(create_time).strftime('%Y-%m-%d %H:%M')
|
||
entry = f"[{time_str}] [{ctx['display_name']}]"
|
||
if sender_label:
|
||
entry += f" {sender_label}:"
|
||
entry += f" {text}"
|
||
return create_time, entry
|
||
|
||
|
||
def _build_history_line(row, ctx, names, id_to_username):
|
||
local_id, local_type, create_time, real_sender_id, content, ct = row
|
||
time_str = datetime.fromtimestamp(create_time).strftime('%Y-%m-%d %H:%M')
|
||
content = _decompress_content(content, ct)
|
||
if content is None:
|
||
content = '(无法解压)'
|
||
|
||
sender, text = _format_message_text(
|
||
local_id, local_type, content, ctx['is_group'], ctx['username'], ctx['display_name'], names
|
||
)
|
||
|
||
sender_label = _resolve_sender_label(
|
||
real_sender_id, sender, ctx['is_group'], ctx['username'], ctx['display_name'], names, id_to_username
|
||
)
|
||
if sender_label:
|
||
return create_time, f'[{time_str}] {sender_label}: {text}'
|
||
return create_time, f'[{time_str}] {text}'
|
||
|
||
|
||
def _get_chat_message_tables(ctx):
|
||
if ctx.get('message_tables'):
|
||
return ctx['message_tables']
|
||
if ctx.get('db_path') and ctx.get('table_name'):
|
||
return [{'db_path': ctx['db_path'], 'table_name': ctx['table_name']}]
|
||
return []
|
||
|
||
|
||
def _iter_table_contexts(ctx):
|
||
for table in _get_chat_message_tables(ctx):
|
||
yield {
|
||
'query': ctx['query'],
|
||
'username': ctx['username'],
|
||
'display_name': ctx['display_name'],
|
||
'db_path': table['db_path'],
|
||
'table_name': table['table_name'],
|
||
'is_group': ctx['is_group'],
|
||
}
|
||
|
||
|
||
def _candidate_page_size(limit, offset):
|
||
return limit + offset
|
||
|
||
|
||
def _message_query_batch_size(candidate_limit):
|
||
return candidate_limit
|
||
|
||
|
||
def _history_query_batch_size(candidate_limit):
|
||
return min(candidate_limit, _HISTORY_QUERY_BATCH_SIZE)
|
||
|
||
|
||
def _page_ranked_entries(entries, limit, offset):
|
||
ordered = sorted(entries, key=lambda item: item[0], reverse=True)
|
||
paged = ordered[offset:offset + limit]
|
||
paged.sort(key=lambda item: item[0])
|
||
return paged
|
||
|
||
|
||
def _collect_chat_history_lines(ctx, names, start_ts=None, end_ts=None, limit=20, offset=0):
|
||
collected = []
|
||
failures = []
|
||
candidate_limit = _candidate_page_size(limit, offset)
|
||
batch_size = _history_query_batch_size(candidate_limit)
|
||
|
||
for table_ctx in _iter_table_contexts(ctx):
|
||
try:
|
||
with closing(sqlite3.connect(table_ctx['db_path'])) as conn:
|
||
id_to_username = _load_name2id_maps(conn)
|
||
fetch_offset = 0
|
||
collected_before_table = len(collected)
|
||
# 当前页上的消息一定落在各分表最近的 offset+limit 条记录内。
|
||
while len(collected) - collected_before_table < candidate_limit:
|
||
rows = _query_messages(
|
||
conn,
|
||
table_ctx['table_name'],
|
||
start_ts=start_ts,
|
||
end_ts=end_ts,
|
||
limit=batch_size,
|
||
offset=fetch_offset,
|
||
)
|
||
if not rows:
|
||
break
|
||
fetch_offset += len(rows)
|
||
|
||
for row in rows:
|
||
try:
|
||
collected.append(_build_history_line(row, table_ctx, names, id_to_username))
|
||
except Exception as e:
|
||
failures.append(
|
||
f"{table_ctx['display_name']} local_id={row[0]} create_time={row[2]}: {e}"
|
||
)
|
||
if len(collected) - collected_before_table >= candidate_limit:
|
||
break
|
||
|
||
if len(rows) < batch_size:
|
||
break
|
||
except Exception as e:
|
||
failures.append(f"{table_ctx['db_path']}: {e}")
|
||
|
||
paged = _page_ranked_entries(collected, limit, offset)
|
||
return [line for _, line in paged], failures
|
||
|
||
|
||
def _collect_chat_search_entries(ctx, names, keyword, start_ts=None, end_ts=None, candidate_limit=20):
|
||
collected = []
|
||
failures = []
|
||
contexts_by_db = {}
|
||
for table_ctx in _iter_table_contexts(ctx):
|
||
contexts_by_db.setdefault(table_ctx['db_path'], []).append(table_ctx)
|
||
|
||
for db_path, db_contexts in contexts_by_db.items():
|
||
try:
|
||
with closing(sqlite3.connect(db_path)) as conn:
|
||
db_entries, db_failures = _collect_search_entries(
|
||
conn,
|
||
db_contexts,
|
||
names,
|
||
keyword,
|
||
start_ts=start_ts,
|
||
end_ts=end_ts,
|
||
candidate_limit=candidate_limit,
|
||
)
|
||
collected.extend(db_entries)
|
||
failures.extend(db_failures)
|
||
except Exception as e:
|
||
failures.extend(f"{table_ctx['display_name']}: {e}" for table_ctx in db_contexts)
|
||
|
||
return collected, failures
|
||
|
||
|
||
def _load_search_contexts_from_db(conn, db_path, names):
|
||
tables = conn.execute(
|
||
"SELECT name FROM sqlite_master WHERE type='table' AND name LIKE 'Msg_%'"
|
||
).fetchall()
|
||
|
||
table_to_username = {}
|
||
try:
|
||
for (user_name,) in conn.execute("SELECT user_name FROM Name2Id").fetchall():
|
||
if not user_name:
|
||
continue
|
||
table_hash = hashlib.md5(user_name.encode()).hexdigest()
|
||
table_to_username[f"Msg_{table_hash}"] = user_name
|
||
except sqlite3.Error:
|
||
pass
|
||
|
||
contexts = []
|
||
for (table_name,) in tables:
|
||
username = table_to_username.get(table_name, '')
|
||
display_name = names.get(username, username) if username else table_name
|
||
contexts.append({
|
||
'query': display_name,
|
||
'username': username,
|
||
'display_name': display_name,
|
||
'db_path': db_path,
|
||
'table_name': table_name,
|
||
'is_group': '@chatroom' in username,
|
||
})
|
||
return contexts
|
||
|
||
|
||
def _collect_search_entries(conn, contexts, names, keyword, start_ts=None, end_ts=None, candidate_limit=20):
|
||
collected = []
|
||
failures = []
|
||
id_to_username = _load_name2id_maps(conn)
|
||
batch_size = _message_query_batch_size(candidate_limit)
|
||
|
||
for ctx in contexts:
|
||
try:
|
||
fetch_offset = 0
|
||
collected_before_table = len(collected)
|
||
# 全局分页只需要每个分表最新的 offset+limit 条有效命中，无需把整表命中读进内存。
|
||
while len(collected) - collected_before_table < candidate_limit:
|
||
rows = _query_messages(
|
||
conn,
|
||
ctx['table_name'],
|
||
start_ts=start_ts,
|
||
end_ts=end_ts,
|
||
keyword=keyword,
|
||
limit=batch_size,
|
||
offset=fetch_offset,
|
||
)
|
||
if not rows:
|
||
break
|
||
fetch_offset += len(rows)
|
||
|
||
for row in rows:
|
||
formatted = _build_search_entry(row, ctx, names, id_to_username)
|
||
if formatted:
|
||
collected.append(formatted)
|
||
if len(collected) - collected_before_table >= candidate_limit:
|
||
break
|
||
|
||
if len(rows) < batch_size:
|
||
break
|
||
except Exception as e:
|
||
failures.append(f"{ctx['display_name']}: {e}")
|
||
|
||
return collected, failures
|
||
|
||
|
||
def _page_search_entries(entries, limit, offset):
|
||
return _page_ranked_entries(entries, limit, offset)
|
||
|
||
|
||
def _search_single_chat(ctx, keyword, start_ts, end_ts, start_time, end_time, limit, offset):
|
||
names = get_contact_names()
|
||
candidate_limit = _candidate_page_size(limit, offset)
|
||
|
||
entries, failures = _collect_chat_search_entries(
|
||
ctx,
|
||
names,
|
||
keyword,
|
||
start_ts=start_ts,
|
||
end_ts=end_ts,
|
||
candidate_limit=candidate_limit,
|
||
)
|
||
|
||
paged = _page_search_entries(entries, limit, offset)
|
||
|
||
if not paged:
|
||
if failures:
|
||
return "查询失败: " + "；".join(failures)
|
||
return f"未在 {ctx['display_name']} 中找到包含 \"{keyword}\" 的消息"
|
||
|
||
header = f"在 {ctx['display_name']} 中搜索 \"{keyword}\" 找到 {len(paged)} 条结果（offset={offset}, limit={limit}）"
|
||
if start_time or end_time:
|
||
header += f"\n时间范围: {start_time or '最早'} ~ {end_time or '最新'}"
|
||
if failures:
|
||
header += "\n查询失败: " + "；".join(failures)
|
||
return header + ":\n\n" + "\n\n".join(item[1] for item in paged)
|
||
|
||
|
||
def _search_multiple_chats(chat_names, keyword, start_ts, end_ts, start_time, end_time, limit, offset):
|
||
try:
|
||
resolved_contexts, unresolved, missing_tables = _resolve_chat_contexts(chat_names)
|
||
except ValueError as e:
|
||
return f"错误: {e}"
|
||
|
||
if not resolved_contexts:
|
||
details = []
|
||
if unresolved:
|
||
details.append("未找到联系人: " + "、".join(unresolved))
|
||
if missing_tables:
|
||
details.append("无消息表: " + "、".join(missing_tables))
|
||
suffix = f"\n{chr(10).join(details)}" if details else ""
|
||
return f"错误: 没有可查询的聊天对象{suffix}"
|
||
|
||
names = get_contact_names()
|
||
candidate_limit = _candidate_page_size(limit, offset)
|
||
collected = []
|
||
failures = []
|
||
for ctx in resolved_contexts:
|
||
chat_entries, chat_failures = _collect_chat_search_entries(
|
||
ctx,
|
||
names,
|
||
keyword,
|
||
start_ts=start_ts,
|
||
end_ts=end_ts,
|
||
candidate_limit=candidate_limit,
|
||
)
|
||
collected.extend(chat_entries)
|
||
failures.extend(chat_failures)
|
||
|
||
paged = _page_search_entries(collected, limit, offset)
|
||
|
||
notes = []
|
||
if unresolved:
|
||
notes.append("未找到联系人: " + "、".join(unresolved))
|
||
if missing_tables:
|
||
notes.append("无消息表: " + "、".join(missing_tables))
|
||
if failures:
|
||
notes.append("查询失败: " + "；".join(failures))
|
||
|
||
if not paged:
|
||
header = f"在 {len(resolved_contexts)} 个聊天对象中未找到包含 \"{keyword}\" 的消息"
|
||
if start_time or end_time:
|
||
header += f"\n时间范围: {start_time or '最早'} ~ {end_time or '最新'}"
|
||
if notes:
|
||
header += "\n" + "\n".join(notes)
|
||
return header
|
||
|
||
header = (
|
||
f"在 {len(resolved_contexts)} 个聊天对象中搜索 \"{keyword}\" 找到 {len(paged)} 条结果"
|
||
f"（offset={offset}, limit={limit}）"
|
||
)
|
||
if start_time or end_time:
|
||
header += f"\n时间范围: {start_time or '最早'} ~ {end_time or '最新'}"
|
||
if notes:
|
||
header += "\n" + "\n".join(notes)
|
||
return header + ":\n\n" + "\n\n".join(item[1] for item in paged)
|
||
|
||
|
||
def _search_all_messages(keyword, start_ts, end_ts, start_time, end_time, limit, offset):
|
||
names = get_contact_names()
|
||
collected = []
|
||
failures = []
|
||
candidate_limit = _candidate_page_size(limit, offset)
|
||
|
||
for rel_key in MSG_DB_KEYS:
|
||
path = _cache.get(rel_key)
|
||
if not path:
|
||
continue
|
||
|
||
try:
|
||
with closing(sqlite3.connect(path)) as conn:
|
||
contexts = _load_search_contexts_from_db(conn, path, names)
|
||
db_entries, db_failures = _collect_search_entries(
|
||
conn,
|
||
contexts,
|
||
names,
|
||
keyword,
|
||
start_ts=start_ts,
|
||
end_ts=end_ts,
|
||
candidate_limit=candidate_limit,
|
||
)
|
||
collected.extend(db_entries)
|
||
failures.extend(db_failures)
|
||
except Exception as e:
|
||
failures.append(f"{rel_key}: {e}")
|
||
|
||
paged = _page_search_entries(collected, limit, offset)
|
||
|
||
if not paged:
|
||
header = f"未找到包含 \"{keyword}\" 的消息"
|
||
if start_time or end_time:
|
||
header += f"\n时间范围: {start_time or '最早'} ~ {end_time or '最新'}"
|
||
if failures:
|
||
header += "\n查询失败: " + "；".join(failures)
|
||
return header
|
||
|
||
header = f"搜索 \"{keyword}\" 找到 {len(paged)} 条结果（offset={offset}, limit={limit}）"
|
||
if start_time or end_time:
|
||
header += f"\n时间范围: {start_time or '最早'} ~ {end_time or '最新'}"
|
||
if failures:
|
||
header += "\n查询失败: " + "；".join(failures)
|
||
return header + ":\n\n" + "\n\n".join(item[1] for item in paged)
|
||
|
||
|
||
# ============ MCP Server ============
|
||
|
||
mcp = FastMCP("wechat", instructions="查询微信消息、联系人等数据")
|
||
|
||
# 新消息追踪
|
||
_last_check_state = {} # {username: last_timestamp}
|
||
|
||
|
||
@mcp.tool()
|
||
def get_recent_sessions(limit: int = 20) -> str:
|
||
"""获取微信最近会话列表，包含最新消息摘要、未读数、时间等。
|
||
用于了解最近有哪些人/群在聊天。
|
||
|
||
Args:
|
||
limit: 返回的会话数量，默认20
|
||
"""
|
||
path = _cache.get(os.path.join("session", "session.db"))
|
||
if not path:
|
||
return "错误: 无法解密 session.db"
|
||
|
||
names = get_contact_names()
|
||
with closing(sqlite3.connect(path)) as conn:
|
||
rows = conn.execute("""
|
||
SELECT username, unread_count, summary, last_timestamp,
|
||
last_msg_type, last_msg_sender, last_sender_display_name
|
||
FROM SessionTable
|
||
WHERE last_timestamp > 0
|
||
ORDER BY last_timestamp DESC
|
||
LIMIT ?
|
||
""", (limit,)).fetchall()
|
||
|
||
results = []
|
||
for r in rows:
|
||
username, unread, summary, ts, msg_type, sender, sender_name = r
|
||
display = names.get(username, username)
|
||
is_group = '@chatroom' in username
|
||
|
||
if isinstance(summary, bytes):
|
||
try:
|
||
summary = _zstd_dctx.decompress(summary).decode('utf-8', errors='replace')
|
||
except Exception:
|
||
summary = '(压缩内容)'
|
||
if isinstance(summary, str) and ':\n' in summary:
|
||
summary = summary.split(':\n', 1)[1]
|
||
|
||
sender_display = ''
|
||
if is_group and sender:
|
||
sender_display = names.get(sender, sender_name or sender)
|
||
|
||
time_str = datetime.fromtimestamp(ts).strftime('%m-%d %H:%M')
|
||
|
||
entry = f"[{time_str}] {display}"
|
||
if is_group:
|
||
entry += " [群]"
|
||
if unread and unread > 0:
|
||
entry += f" ({unread}条未读)"
|
||
entry += f"\n {format_msg_type(msg_type)}: "
|
||
if sender_display:
|
||
entry += f"{sender_display}: "
|
||
entry += str(summary or "(无内容)")
|
||
|
||
results.append(entry)
|
||
|
||
return f"最近 {len(results)} 个会话:\n\n" + "\n\n".join(results)
|
||
|
||
|
||
@mcp.tool()
|
||
def get_chat_history(chat_name: str, limit: int = 50, offset: int = 0, start_time: str = "", end_time: str = "") -> str:
|
||
"""获取指定聊天的消息记录。
|
||
|
||
Args:
|
||
chat_name: 聊天对象的名字、备注名或wxid，自动模糊匹配
|
||
limit: 返回的消息数量，默认50；支持较大的值，建议配合 offset 分页使用
|
||
offset: 分页偏移量，默认0
|
||
start_time: 起始时间，支持 YYYY-MM-DD / YYYY-MM-DD HH:MM / YYYY-MM-DD HH:MM:SS
|
||
end_time: 结束时间，支持 YYYY-MM-DD / YYYY-MM-DD HH:MM / YYYY-MM-DD HH:MM:SS
|
||
"""
|
||
try:
|
||
_validate_pagination(limit, offset, limit_max=None)
|
||
start_ts, end_ts = _parse_time_range(start_time, end_time)
|
||
except ValueError as e:
|
||
return f"错误: {e}"
|
||
|
||
ctx = _resolve_chat_context(chat_name)
|
||
if not ctx:
|
||
return f"找不到聊天对象: {chat_name}\n提示: 可以用 get_contacts(query='{chat_name}') 搜索联系人"
|
||
if not ctx['db_path']:
|
||
return f"找不到 {ctx['display_name']} 的消息记录（可能在未解密的DB中或无消息）"
|
||
|
||
names = get_contact_names()
|
||
lines, failures = _collect_chat_history_lines(
|
||
ctx,
|
||
names,
|
||
start_ts=start_ts,
|
||
end_ts=end_ts,
|
||
limit=limit,
|
||
offset=offset,
|
||
)
|
||
|
||
if not lines:
|
||
if failures:
|
||
return "查询失败: " + "；".join(failures)
|
||
return f"{ctx['display_name']} 无消息记录"
|
||
|
||
header = f"{ctx['display_name']} 的消息记录（返回 {len(lines)} 条，offset={offset}, limit={limit}）"
|
||
if ctx['is_group']:
|
||
header += " [群聊]"
|
||
if start_time or end_time:
|
||
header += f"\n时间范围: {start_time or '最早'} ~ {end_time or '最新'}"
|
||
if failures:
|
||
header += "\n查询失败: " + "；".join(failures)
|
||
return header + ":\n\n" + "\n".join(lines)
|
||
|
||
|
||
@mcp.tool()
|
||
def search_messages(
|
||
keyword: str,
|
||
chat_name: str | list[str] | None = None,
|
||
start_time: str = "",
|
||
end_time: str = "",
|
||
limit: int = 20,
|
||
offset: int = 0,
|
||
) -> str:
|
||
"""搜索消息内容，支持全库、单个聊天对象、多个聊天对象，以及时间范围和分页。
|
||
|
||
Args:
|
||
keyword: 搜索关键词
|
||
chat_name: 聊天对象名称，可为空、单个字符串或字符串列表
|
||
start_time: 起始时间，可为空
|
||
end_time: 结束时间，可为空
|
||
limit: 返回的结果数量，默认20，最大500
|
||
offset: 分页偏移量，默认0
|
||
"""
|
||
if not keyword or len(keyword) < 1:
|
||
return "请提供搜索关键词"
|
||
|
||
chat_names = _normalize_chat_names(chat_name)
|
||
|
||
try:
|
||
_validate_pagination(limit, offset)
|
||
start_ts, end_ts = _parse_time_range(start_time, end_time)
|
||
except ValueError as e:
|
||
return f"错误: {e}"
|
||
|
||
if len(chat_names) == 1:
|
||
ctx = _resolve_chat_context(chat_names[0])
|
||
if not ctx:
|
||
return f"找不到聊天对象: {chat_names[0]}\n提示: 可以用 get_contacts(query='{chat_names[0]}') 搜索联系人"
|
||
if not ctx['db_path']:
|
||
return f"找不到 {ctx['display_name']} 的消息记录（可能在未解密的DB中或无消息）"
|
||
return _search_single_chat(
|
||
ctx,
|
||
keyword,
|
||
start_ts,
|
||
end_ts,
|
||
start_time,
|
||
end_time,
|
||
limit,
|
||
offset,
|
||
)
|
||
|
||
if len(chat_names) > 1:
|
||
return _search_multiple_chats(
|
||
chat_names,
|
||
keyword,
|
||
start_ts,
|
||
end_ts,
|
||
start_time,
|
||
end_time,
|
||
limit,
|
||
offset,
|
||
)
|
||
|
||
return _search_all_messages(
|
||
keyword,
|
||
start_ts,
|
||
end_ts,
|
||
start_time,
|
||
end_time,
|
||
limit,
|
||
offset,
|
||
)
|
||
|
||
@mcp.tool()
|
||
def get_contacts(query: str = "", limit: int = 50) -> str:
|
||
"""搜索或列出微信联系人。
|
||
|
||
Args:
|
||
query: 搜索关键词（匹配昵称、备注名、wxid），留空列出所有
|
||
limit: 返回数量，默认50
|
||
"""
|
||
contacts = get_contact_full()
|
||
if not contacts:
|
||
return "错误: 无法加载联系人数据"
|
||
|
||
if query:
|
||
q = query.lower()
|
||
filtered = [
|
||
c for c in contacts
|
||
if q in c['nick_name'].lower()
|
||
or q in c['remark'].lower()
|
||
or q in c['username'].lower()
|
||
]
|
||
else:
|
||
filtered = contacts
|
||
|
||
filtered = filtered[:limit]
|
||
|
||
if not filtered:
|
||
return f"未找到匹配 \"{query}\" 的联系人"
|
||
|
||
lines = []
|
||
for c in filtered:
|
||
line = c['username']
|
||
if c['remark']:
|
||
line += f" 备注: {c['remark']}"
|
||
if c['nick_name']:
|
||
line += f" 昵称: {c['nick_name']}"
|
||
lines.append(line)
|
||
|
||
header = f"找到 {len(filtered)} 个联系人"
|
||
if query:
|
||
header += f"（搜索: {query}）"
|
||
return header + ":\n\n" + "\n".join(lines)
|
||
|
||
|
||
@mcp.tool()
|
||
def get_contact_tags() -> str:
|
||
"""列出所有微信联系人标签及成员数量。"""
|
||
tags = _load_contact_tags()
|
||
if not tags:
|
||
return "未找到标签数据（contact_label 表可能不存在）"
|
||
|
||
sorted_tags = sorted(tags.values(), key=lambda t: t['sort_order'])
|
||
total_assoc = sum(len(t['members']) for t in sorted_tags)
|
||
|
||
lines = [f"共 {len(sorted_tags)} 个标签，{total_assoc} 个关联:\n"]
|
||
for t in sorted_tags:
|
||
lines.append(f" [{t['name']}] {len(t['members'])}人")
|
||
return "\n".join(lines)
|
||
|
||
|
||
@mcp.tool()
|
||
def get_tag_members(tag_name: str) -> str:
|
||
"""获取指定标签下的所有联系人。支持模糊匹配标签名。
|
||
|
||
Args:
|
||
tag_name: 标签名称，支持精确和模糊匹配
|
||
"""
|
||
tags = _load_contact_tags()
|
||
if not tags:
|
||
return "未找到标签数据（contact_label 表可能不存在）"
|
||
|
||
q = tag_name.strip().lower()
|
||
|
||
# 精确匹配
|
||
exact = [t for t in tags.values() if t['name'].lower() == q]
|
||
if exact:
|
||
matched = exact[0]
|
||
else:
|
||
# 模糊匹配 (contains)
|
||
fuzzy = [t for t in tags.values() if q in t['name'].lower()]
|
||
if not fuzzy:
|
||
all_names = [t['name'] for t in sorted(tags.values(), key=lambda t: t['sort_order'])]
|
||
return f"未找到匹配 \"{tag_name}\" 的标签。\n\n现有标签: {', '.join(all_names)}"
|
||
if len(fuzzy) == 1:
|
||
matched = fuzzy[0]
|
||
else:
|
||
names = [t['name'] for t in fuzzy]
|
||
return f"找到 {len(fuzzy)} 个匹配的标签，请指定:\n" + "\n".join(f" [{n}]" for n in names)
|
||
|
||
members = matched['members']
|
||
if not members:
|
||
return f"标签 [{matched['name']}] 没有成员"
|
||
|
||
lines = [f"标签 [{matched['name']}] 共 {len(members)} 人:\n"]
|
||
for m in members:
|
||
line = m['username']
|
||
if m['display_name'] != m['username']:
|
||
line += f" {m['display_name']}"
|
||
lines.append(f" {line}")
|
||
return "\n".join(lines)
|
||
|
||
|
||
@mcp.tool()
|
||
def get_new_messages() -> str:
|
||
"""获取自上次调用以来的新消息。首次调用返回最近的会话状态。"""
|
||
global _last_check_state
|
||
|
||
path = _cache.get(os.path.join("session", "session.db"))
|
||
if not path:
|
||
return "错误: 无法解密 session.db"
|
||
|
||
names = get_contact_names()
|
||
with closing(sqlite3.connect(path)) as conn:
|
||
rows = conn.execute("""
|
||
SELECT username, unread_count, summary, last_timestamp,
|
||
last_msg_type, last_msg_sender, last_sender_display_name
|
||
FROM SessionTable
|
||
WHERE last_timestamp > 0
|
||
ORDER BY last_timestamp DESC
|
||
""").fetchall()
|
||
|
||
curr_state = {}
|
||
for r in rows:
|
||
username, unread, summary, ts, msg_type, sender, sender_name = r
|
||
curr_state[username] = {
|
||
'unread': unread, 'summary': summary, 'timestamp': ts,
|
||
'msg_type': msg_type, 'sender': sender or '', 'sender_name': sender_name or '',
|
||
}
|
||
|
||
if not _last_check_state:
|
||
_last_check_state = {u: s['timestamp'] for u, s in curr_state.items()}
|
||
# 首次调用，返回有未读的会话
|
||
unread_msgs = []
|
||
for username, s in curr_state.items():
|
||
if s['unread'] and s['unread'] > 0:
|
||
display = names.get(username, username)
|
||
is_group = '@chatroom' in username
|
||
summary = s['summary']
|
||
if isinstance(summary, bytes):
|
||
try:
|
||
summary = _zstd_dctx.decompress(summary).decode('utf-8', errors='replace')
|
||
except Exception:
|
||
summary = '(压缩内容)'
|
||
if isinstance(summary, str) and ':\n' in summary:
|
||
summary = summary.split(':\n', 1)[1]
|
||
time_str = datetime.fromtimestamp(s['timestamp']).strftime('%H:%M')
|
||
tag = "[群]" if is_group else ""
|
||
unread_msgs.append(f"[{time_str}] {display}{tag} ({s['unread']}条未读): {summary}")
|
||
|
||
if unread_msgs:
|
||
return f"当前 {len(unread_msgs)} 个未读会话:\n\n" + "\n".join(unread_msgs)
|
||
return "当前无未读消息（已记录状态，下次调用将返回新消息）"
|
||
|
||
# 对比上次状态
|
||
new_msgs = []
|
||
for username, s in curr_state.items():
|
||
prev_ts = _last_check_state.get(username, 0)
|
||
if s['timestamp'] > prev_ts:
|
||
display = names.get(username, username)
|
||
is_group = '@chatroom' in username
|
||
summary = s['summary']
|
||
if isinstance(summary, bytes):
|
||
try:
|
||
summary = _zstd_dctx.decompress(summary).decode('utf-8', errors='replace')
|
||
except Exception:
|
||
summary = '(压缩内容)'
|
||
if isinstance(summary, str) and ':\n' in summary:
|
||
summary = summary.split(':\n', 1)[1]
|
||
|
||
sender_display = ''
|
||
if is_group and s['sender']:
|
||
sender_display = names.get(s['sender'], s['sender_name'] or s['sender'])
|
||
|
||
time_str = datetime.fromtimestamp(s['timestamp']).strftime('%H:%M:%S')
|
||
entry = f"[{time_str}] {display}"
|
||
if is_group:
|
||
entry += " [群]"
|
||
entry += f": {format_msg_type(s['msg_type'])}"
|
||
if sender_display:
|
||
entry += f" ({sender_display})"
|
||
entry += f" - {summary}"
|
||
new_msgs.append((s['timestamp'], entry))
|
||
|
||
_last_check_state = {u: s['timestamp'] for u, s in curr_state.items()}
|
||
|
||
if not new_msgs:
|
||
return "无新消息"
|
||
|
||
new_msgs.sort(key=lambda x: x[0])
|
||
entries = [m[1] for m in new_msgs]
|
||
return f"{len(entries)} 条新消息:\n\n" + "\n".join(entries)
|
||
|
||
|
||
# ============ 图片解密 ============
|
||
|
||
_image_resolver = ImageResolver(WECHAT_BASE_DIR, DECODED_IMAGE_DIR, _cache)
|
||
|
||
|
||
@mcp.tool()
|
||
def decode_image(chat_name: str, local_id: int) -> str:
|
||
"""解密微信聊天中的一张图片。
|
||
|
||
先用 get_chat_history 查看消息，图片消息会显示 local_id，
|
||
然后用此工具解密对应图片。
|
||
|
||
Args:
|
||
chat_name: 聊天对象的名字、备注名或wxid
|
||
local_id: 图片消息的 local_id（从 get_chat_history 获取）
|
||
"""
|
||
username = resolve_username(chat_name)
|
||
if not username:
|
||
return f"找不到聊天对象: {chat_name}"
|
||
|
||
result = _image_resolver.decode_image(username, local_id)
|
||
if result['success']:
|
||
return (
|
||
f"解密成功!\n"
|
||
f" 文件: {result['path']}\n"
|
||
f" 格式: {result['format']}\n"
|
||
f" 大小: {result['size']:,} bytes\n"
|
||
f" MD5: {result['md5']}"
|
||
)
|
||
else:
|
||
error = result['error']
|
||
if 'md5' in result:
|
||
error += f"\n MD5: {result['md5']}"
|
||
return f"解密失败: {error}"
|
||
|
||
|
||
@mcp.tool()
|
||
def get_chat_images(chat_name: str, limit: int = 20) -> str:
|
||
"""列出某个聊天中的图片消息。
|
||
|
||
返回图片的时间、local_id、MD5、文件大小等信息。
|
||
可以配合 decode_image 工具解密指定图片。
|
||
|
||
Args:
|
||
chat_name: 聊天对象的名字、备注名或wxid
|
||
limit: 返回数量，默认20
|
||
"""
|
||
username = resolve_username(chat_name)
|
||
if not username:
|
||
return f"找不到聊天对象: {chat_name}"
|
||
|
||
names = get_contact_names()
|
||
display_name = names.get(username, username)
|
||
|
||
db_path, table_name = _find_msg_table_for_user(username)
|
||
if not db_path:
|
||
return f"找不到 {display_name} 的消息记录"
|
||
|
||
images = _image_resolver.list_chat_images(db_path, table_name, username, limit)
|
||
if not images:
|
||
return f"{display_name} 无图片消息"
|
||
|
||
lines = []
|
||
for img in images:
|
||
time_str = datetime.fromtimestamp(img['create_time']).strftime('%Y-%m-%d %H:%M')
|
||
line = f"[{time_str}] local_id={img['local_id']}"
|
||
if img.get('md5'):
|
||
line += f" MD5={img['md5']}"
|
||
if img.get('size'):
|
||
size_kb = img['size'] / 1024
|
||
line += f" {size_kb:.0f}KB"
|
||
if not img.get('md5'):
|
||
line += " (无资源信息)"
|
||
lines.append(line)
|
||
|
||
return f"{display_name} 的 {len(lines)} 张图片:\n\n" + "\n".join(lines)
|
||
|
||
|
||
if __name__ == "__main__":
|
||
mcp.run()
|