add additonal source for checking proxy ip

check_proxy.py

@@ -3,15 +3,18 @@ def check_proxy(proxies):
     import requests
     proxies_https = proxies['https'] if proxies is not None else '无'
     try:
-        response = requests.get("https://ipapi.co/json/",
-                                proxies=proxies, timeout=4)
+        response = requests.get("https://ipapi.co/json/", proxies=proxies, timeout=4)
         data = response.json()
         print(f'查询代理的地理位置，返回的结果是{data}')
         if 'country_name' in data:
             country = data['country_name']
             result = f"代理配置 {proxies_https}, 代理所在地：{country}"
         elif 'error' in data:
-            result = f"代理配置 {proxies_https}, 代理所在地：未知，IP查询频率受限"
+            alternative = _check_with_backup_source(proxies)
+            if alternative is None:
+                result = f"代理配置 {proxies_https}, 代理所在地：未知，IP查询频率受限"
+            else:
+                result = f"代理配置 {proxies_https}, 代理所在地：{alternative}"
         else:
             result = f"代理配置 {proxies_https}, 代理数据解析失败：{data}"
         print(result)
@@ -21,6 +24,11 @@ def check_proxy(proxies):
         print(result)
         return result
 
+def _check_with_backup_source(proxies):
+    import random, string, requests
+    random_string = ''.join(random.choices(string.ascii_letters + string.digits, k=32))
+    try: return requests.get(f"http://{random_string}.edns.ip-api.com/json", proxies=proxies, timeout=4).json()['dns']['geo']
+    except: return None
 
 def backup_and_download(current_version, remote_version):
     """