新增速率限制；增强兼容性

main.py

@@ -1,4 +1,6 @@
-import os, json, random, socket, logging, ipaddress, urllib.error, urllib.parse, urllib.request
+import os, json, random, socket, logging, ipaddress, urllib.error, urllib.parse, urllib.request, threading
+from collections import defaultdict, deque
+from time import monotonic
 from pathlib import Path
 from datetime import date, datetime
 from zoneinfo import ZoneInfo, available_timezones
@@ -90,6 +92,34 @@ for item in RIDDLE_DATA:
     RIDDLE_RIDDLE_MAP[riddle_lower].append(item)
     RIDDLE_ANSWER_MAP[answer_lower].append(item)
 
+RATE_LIMIT = 30
+RATE_WINDOW_SECONDS = 60
+_request_times = defaultdict(deque)
+_rate_limit_lock = threading.Lock()
+
+
+@app.before_request
+def enforce_rate_limit():
+    now = monotonic()
+    forwarded_for = request.headers.get("X-Forwarded-For", "")
+    client_ip = forwarded_for.split(",", 1)[0].strip() or request.remote_addr or "unknown"
+    with _rate_limit_lock:
+        timestamps = _request_times[client_ip]
+        cutoff = now - RATE_WINDOW_SECONDS
+        while timestamps and timestamps[0] <= cutoff:
+            timestamps.popleft()
+        if len(timestamps) >= RATE_LIMIT:
+            retry_after = max(1, int(timestamps[0] + RATE_WINDOW_SECONDS - now + 0.999))
+            response = jsonify({
+                "error": "请求过于频繁，请稍后再试",
+                "limit": f"{RATE_LIMIT}/min",
+                "retry_after": retry_after,
+            })
+            response.status_code = 429
+            response.headers["Retry-After"] = str(retry_after)
+            return response
+        timestamps.append(now)
+
 
 @app.route("/favicon.ico")
 def favicon():
@@ -135,7 +165,7 @@ def lunar():
     args_lower = {k.lower(): v for k, v in request.args.items()}
     if set(args_lower.keys()) - {"date"}:
         return jsonify({
-            "error": f"{set(args_lower.keys()) - {"date"}}参数非法",
+            "error": "{}参数非法".format(set(args_lower.keys()) - {"date"}),
             "allowed_params": ["date=YYYY-MM-DD"],
         })
     ds = args_lower.get("date", "").strip()
@@ -193,7 +223,7 @@ def luck():
     args_lower = {k.lower(): v for k, v in request.args.items()}
     if set(args_lower.keys()) - {"id", "title", "type"}:
         return jsonify({
-            "error": f"{set(args_lower.keys()) - {"id", "title", "type"}}参数非法",
+            "error": "{}参数非法".format(set(args_lower.keys()) - {"id", "title", "type"}),
             "allowed_params": ["id=xxx", "title=xxx", "type=xxx"],
         })
     luck_id = args_lower.get("id", "").strip()
@@ -251,7 +281,7 @@ def poem():
     args_lower = {k.lower(): v for k, v in request.args.items()}
     if set(args_lower.keys()) - {"id", "title", "author", "type", "full"}:
         return jsonify({
-            "error": f"{set(args_lower.keys()) - {"id", "title", "author", "type", "full"}}参数非法",
+            "error": "{}参数非法".format(set(args_lower.keys()) - {"id", "title", "author", "type", "full"}),
             "allowed_params": ["id=xxx", "title=xxx", "author=xxx", "type=xxx", "full=true/false"],
         })
     poem_id = args_lower.get("id", "").strip()
@@ -347,7 +377,7 @@ def ip():
     args_lower = {k.lower(): v for k, v in request.args.items()}
     if set(args_lower.keys()) - {"name"}:
         return jsonify({
-            "error": f"{set(args_lower.keys()) - {"name"}}参数非法",
+            "error": "{}参数非法".format(set(args_lower.keys()) - {"name"}),
             "allowed_params": ["name=xxx"],
         })
     query_name = args_lower.get("name", "").strip()
@@ -417,7 +447,7 @@ def time_api():
     args_lower = {k.lower(): v for k, v in request.args.items()}
     if set(args_lower.keys()) - {"tz"}:
         return jsonify({
-            "error": f"{set(args_lower.keys()) - {"tz"}}参数非法",
+            "error": "{}参数非法".format(set(args_lower.keys()) - {"tz"}),
             "allowed_params": ["tz=xxx"],
         })
     tz = args_lower.get("tz", "").strip()
@@ -482,7 +512,7 @@ def riddle():
     args_lower = {k.lower(): v for k, v in request.args.items()}
     if set(args_lower.keys()) - {"riddle", "answer"}:
         return jsonify({
-            "error": f"{set(args_lower.keys()) - {"riddle", "answer"}}参数非法",
+            "error": "{}参数非法".format(set(args_lower.keys()) - {"riddle", "answer"}),
             "allowed_params": ["riddle=xxx", "answer=xxx"],
         })
     query_riddle = args_lower.get("riddle", "").strip()
@@ -532,7 +562,7 @@ def sci():
     args_lower = {k.lower(): v for k, v in request.args.items()}
     if set(args_lower.keys()) - {"nane", "name"}:
         return jsonify({
-            "error": f"{set(args_lower.keys()) - {"nane", "name"}}参数非法",
+            "error": "{}参数非法".format(set(args_lower.keys()) - {"nane", "name"}),
             "allowed_params": ["nane=xxx"],
         })
     publication_name = args_lower.get("nane", "").strip() or args_lower.get("name", "").strip()
@@ -604,7 +634,7 @@ def agent():
     extra_params = set(args_lower.keys()) - allowed_keys
     if extra_params:
         return jsonify({
-            "error": f"{extra_params}参数非法",
+            "error": "{}参数非法".format(extra_params),
             "allowed_params": ["url=xxx", "ref=xxx", "pwd=xxx"],
         })
     target_url = args_lower.get("url", "").strip()
@@ -692,7 +722,7 @@ def pan_file_download():
     extra_params = set(args_lower.keys()) - allowed_keys
     if extra_params:
         return jsonify({
-            "error": f"{extra_params}参数非法",
+            "error": "{}参数非法".format(extra_params),
             "allowed_params": ["name=xxx", "download=true/false"],
         })
     file_name = args_lower.get("name", "").strip()