aa

app_web.py

@@ -1,27 +1,42 @@
 import asyncio
 import contextlib
+import html
 import importlib.util
 import io
 import json
+import logging
 import os
 import sqlite3
 import time
+import traceback
 from collections import deque
 from datetime import datetime, timedelta
 from pathlib import Path
-from typing import Any, Dict, List, Optional, Tuple
+from typing import Any, Dict, List, Optional, Tuple, Union
 
 from fastapi import FastAPI, Form, Query, Request
-from fastapi.responses import RedirectResponse
+from fastapi.responses import HTMLResponse, RedirectResponse
 from fastapi.templating import Jinja2Templates
 
 BASE_DIR = Path(__file__).resolve().parent
 ENV_FILE = BASE_DIR / ".env"
 SCRIPT_FILE = BASE_DIR / "telegram-scraper.py"
 STATE_FILE = BASE_DIR / "state.json"
+TEMPLATES_DIR = BASE_DIR / "templates"
+
+logger = logging.getLogger("uvicorn.error")
 
 app = FastAPI(title="Telegram Scraper Web Console")
-templates = Jinja2Templates(directory=str(BASE_DIR / "templates"))
+templates = Jinja2Templates(directory=str(TEMPLATES_DIR))
+
+
+@app.on_event("startup")
+async def _verify_runtime_files() -> None:
+    idx = TEMPLATES_DIR / "index.html"
+    if not idx.is_file():
+        raise RuntimeError(f"缺少模板文件（请确认挂载目录含 templates/）：{idx.resolve()}")
+    if not SCRIPT_FILE.is_file():
+        raise RuntimeError(f"缺少 telegram-scraper.py：{SCRIPT_FILE.resolve()}")
 
 
 def read_state_channel_maps() -> Tuple[Dict[str, str], Dict[str, str]]:
@@ -31,17 +46,27 @@ def read_state_channel_maps() -> Tuple[Dict[str, str], Dict[str, str]]:
         raw = json.loads(STATE_FILE.read_text(encoding="utf-8"))
         titles = raw.get("channel_titles") or {}
         names = raw.get("channel_names") or {}
+        if not isinstance(titles, dict):
+            titles = {}
+        if not isinstance(names, dict):
+            names = {}
         return {str(k): str(v) for k, v in titles.items()}, {str(k): str(v) for k, v in names.items()}
     except Exception:
         return {}, {}
 
 
+def _as_str(v: Union[str, int, float, None]) -> str:
+    if v is None:
+        return ""
+    return str(v).strip()
+
+
 def channel_display_name(cid: str, titles: Dict[str, str], names: Dict[str, str]) -> str:
     cid = str(cid)
-    t = (titles.get(cid) or "").strip()
+    t = _as_str(titles.get(cid))
     if t and t != cid and not (len(t) > 6 and t.startswith("-") and t[1:].replace("-", "").isdigit()):
         return t
-    u = (names.get(cid) or "no_username").strip()
+    u = _as_str(names.get(cid)) or "no_username"
     if u and u != "no_username":
         return "@" + u.lstrip("@")
     return "未命名频道"
@@ -172,9 +197,15 @@ class WebScraperService:
                 return []
             try:
                 raw = json.loads(STATE_FILE.read_text(encoding="utf-8"))
-                channels = raw.get("channels", {})
-                names = raw.get("channel_names", {})
-                titles = raw.get("channel_titles", {})
+                channels = raw.get("channels") or {}
+                if not isinstance(channels, dict):
+                    channels = {}
+                names = raw.get("channel_names") or {}
+                titles = raw.get("channel_titles") or {}
+                if not isinstance(names, dict):
+                    names = {}
+                if not isinstance(titles, dict):
+                    titles = {}
                 return [
                     {
                         "channel_id": str(cid),
@@ -186,8 +217,12 @@ class WebScraperService:
                 ]
             except Exception:
                 return []
-        titles = self.scraper.state.get("channel_titles", {})
-        names = self.scraper.state.get("channel_names", {})
+        titles = self.scraper.state.get("channel_titles") or {}
+        names = self.scraper.state.get("channel_names") or {}
+        if not isinstance(titles, dict):
+            titles = {}
+        if not isinstance(names, dict):
+            names = {}
         rows: List[Dict[str, str]] = []
         for cid, last_id in self.scraper.state.get("channels", {}).items():
             rows.append(
@@ -567,6 +602,7 @@ async def api_stats_overview(
 
 @app.get("/")
 async def index(request: Request):
+    try:
         env_vals = read_env_dict()
         fields = [
             {"key": k, "label": label, "type": field_type, "value": env_vals.get(k, "")}
@@ -599,6 +635,27 @@ async def index(request: Request):
                 "error": err,
             },
         )
+    except Exception as e:
+        logger.exception("GET / 渲染失败")
+        tb = traceback.format_exc()
+        try:
+            service._append(f"首页异常：{e}")
+            for line in tb.splitlines()[:80]:
+                if line.strip():
+                    service._append(line.strip())
+        except Exception:
+            pass
+        detail = tb[:12000]
+        return HTMLResponse(
+            "<!DOCTYPE html><html lang=\"zh-CN\"><head><meta charset=\"utf-8\"/><title>错误</title></head>"
+            "<body style=\"font-family:system-ui;padding:16px;background:#0f172a;color:#e2e8f0;\">"
+            "<h1>首页 Internal Server Error</h1>"
+            "<p>常见原因：Docker 挂载目录里缺少 <code>templates/</code> 或 <code>telegram-scraper.py</code>；或 <code>state.json</code> 格式异常。</p>"
+            "<pre style=\"white-space:pre-wrap;word-break:break-all;font-size:12px;\">"
+            + html.escape(detail)
+            + "</pre></body></html>",
+            status_code=500,
+        )
 
 
 @app.post("/config")

templates/index.html

@@ -908,7 +908,7 @@
                     <div class="list" id="monitored-list" role="list">
                         {% if monitored %}
                             {% for ch in monitored %}
-                                <div class="line" role="listitem">[{{ loop.index }}] {{ ch.display_name }} · 进度消息 ID {{ ch.last_message_id }}</div>
+                                <div class="line" role="listitem">[{{ loop.index }}] {{ ch.display_name | default('未命名频道') }} · 进度消息 ID {{ ch.last_message_id }}</div>
                             {% endfor %}
                         {% else %}
                             <div class="line" role="listitem">暂无</div>