Update app.py

app.py

@@ -1,4 +1,7 @@
 import os
+# ✅ Fix Matplotlib config/cache permission issue in read-only containers
+os.environ["MPLCONFIGDIR"] = "/tmp/matplotlib"
+
 import uuid
 import tempfile
 from datetime import datetime, timedelta, timezone
@@ -17,9 +20,9 @@ from linebot.v3.webhooks import MessageEvent, TextMessageContent
 import requests
 import pandas as pd
 
-# --- Matplotlib (no GUI) ---
+# --- Matplotlib (headless)
 import matplotlib
-matplotlib.use("Agg")   # headless backend
+matplotlib.use("Agg")   # Use Agg backend (no display server required)
 import matplotlib.pyplot as plt
 from matplotlib.colors import Normalize
 import matplotlib.cm as cm
@@ -29,7 +32,7 @@ CHANNEL_ACCESS_TOKEN = os.getenv("CHANNEL_ACCESS_TOKEN")
 CHANNEL_SECRET = os.getenv("CHANNEL_SECRET")
 HF_SPACE_URL = os.getenv("SPACEURL")  # e.g., https://<space>.hf.space
 
-# --- Writable static directory (avoid PermissionError) ---
+# --- Writable static directory ---
 STATIC_DIR = os.getenv("STATIC_DIR", os.path.join(tempfile.gettempdir(), "static"))
 os.makedirs(STATIC_DIR, exist_ok=True)
 
@@ -67,7 +70,6 @@ def home():
 def healthz():
     return "ok"
 
-# Serve files from our writable static dir (e.g., /tmp/static)
 @app.route("/static/<path:filename>")
 def serve_static(filename):
     return send_from_directory(STATIC_DIR, filename)
@@ -145,12 +147,9 @@ def fetch_taiwan_df_this_year(min_mag=5.0) -> pd.DataFrame | str:
     except Exception as e:
         return f"❌ 查詢失敗: {e}"
 
-# --- Map (PNG via Matplotlib, no Chrome needed) ---
+# --- Map with Matplotlib ---
 def create_and_save_map(df: pd.DataFrame) -> str:
-    # Figure
     fig, ax = plt.subplots(figsize=(9, 6), dpi=150)
-
-    # Taiwan bounding box & grid
     lon_min, lon_max = 118.5, 123.5
     lat_min, lat_max = 20.5, 26.8
     ax.set_xlim(lon_min, lon_max)
@@ -158,17 +157,13 @@ def create_and_save_map(df: pd.DataFrame) -> str:
     ax.set_xlabel("Longitude (°E)")
     ax.set_ylabel("Latitude (°N)")
     ax.set_title(f"今年 ({datetime.now(timezone.utc).year}) 台灣區域顯著地震 (M≥5.0)  — UTC")
-
     ax.grid(True, linestyle="--", linewidth=0.5, alpha=0.4)
 
-    # Scatter colored by magnitude
     mags = df["magnitude"].astype(float).clip(lower=0)
     norm = Normalize(vmin=max(4.5, mags.min()), vmax=max(6.5, mags.max()))
     cmap = cm.get_cmap("YlOrRd")
     colors = cmap(norm(mags.values))
-
-    # Size scale (points^2): tune for LINE preview
-    sizes = 15 + (mags - mags.min()) * 25  # 15–approx 140
+    sizes = 15 + (mags - mags.min()) * 25
 
     sc = ax.scatter(
         df["longitude"].values,
@@ -180,16 +175,13 @@ def create_and_save_map(df: pd.DataFrame) -> str:
         alpha=0.9,
     )
 
-    # Colorbar
     cbar = fig.colorbar(cm.ScalarMappable(norm=norm, cmap=cmap), ax=ax, pad=0.02)
     cbar.set_label("Magnitude")
 
-    # Legend example (size ~ mag)
     for m in [5.0, 6.0, 7.0]:
         ax.scatter([], [], s=15 + (m - mags.min()) * 25, c="none", edgecolor="k", label=f"M {m:.1f}")
     ax.legend(title="Size ∝ Magnitude", loc="lower right", framealpha=0.9)
 
-    # Save
     filename = f"map_{uuid.uuid4().hex}.png"
     filepath = os.path.join(STATIC_DIR, filename)
     fig.tight_layout()
@@ -221,7 +213,6 @@ def handle_message(event):
     with ApiClient(configuration) as api_client:
         line_bot_api = MessagingApi(api_client)
 
-        # Taiwan map command
         if ("臺灣地震畫圖" in user_message) or ("台灣地震畫圖" in user_message):
             result = fetch_taiwan_df_this_year()
             if isinstance(result, pd.DataFrame):
@@ -245,7 +236,6 @@ def handle_message(event):
             line_bot_api.reply_message_with_http_info(reply)
             return
 
-        # Help
         if user_message == "/help":
             text = (
                 "📖 地震預警 dayichen 指令說明\n\n"
@@ -260,7 +250,6 @@ def handle_message(event):
             )
             return
 
-        # Taiwan list
         if ("臺灣地震" in user_message) or ("台灣地震" in user_message):
             result = fetch_taiwan_df_this_year()
             if isinstance(result, pd.DataFrame):
@@ -274,13 +263,11 @@ def handle_message(event):
                 reply_text = "\n\n".join(lines)
             else:
                 reply_text = result
-
             line_bot_api.reply_message_with_http_info(
                 ReplyMessageRequest(reply_token=event.reply_token, messages=[TextMessage(text=reply_text)])
             )
             return
 
-        # Global last 24h
         if ("地震" in user_message) or ("quake" in user_message):
             reply_text = fetch_global_last24h_text()
             line_bot_api.reply_message_with_http_info(
@@ -288,7 +275,6 @@ def handle_message(event):
             )
             return
 
-        # Greeting
         if ("你好" in user_message) or ("hi" in user_message):
             line_bot_api.reply_message_with_http_info(
                 ReplyMessageRequest(
@@ -296,7 +282,4 @@ def handle_message(event):
                     messages=[TextMessage(text="👋 你好！我是地震查詢機器人���\n\n輸入 /help 查看所有指令。")]
                 )
             )
-            return
-
-        # Unmatched: no-op
-        return
+            return