diff --git a/chaquo/src/main/python/app.py b/chaquo/src/main/python/app.py
index 6f5d5f0b9..6e5db1fea 100644
--- a/chaquo/src/main/python/app.py
+++ b/chaquo/src/main/python/app.py
@@ -86,6 +86,10 @@ def localProxy(ru, param):
     return result
 
 
+def destroy(ru):
+    ru.destroy()
+
+
 def run():
     pass
 
diff --git a/chaquo/src/main/python/base/spider.py b/chaquo/src/main/python/base/spider.py
index fa98d6173..1944c942c 100644
--- a/chaquo/src/main/python/base/spider.py
+++ b/chaquo/src/main/python/base/spider.py
@@ -63,7 +63,6 @@ class Spider(metaclass=ABCMeta):
     def getName(self):
         pass
 
-    @abstractmethod
     def destroy(self):
         pass
 
@@ -84,18 +83,18 @@ class Spider(metaclass=ABCMeta):
         clean = re.sub('[\U0001F600-\U0001F64F\U0001F300-\U0001F5FF\U0001F680-\U0001F6FF\U0001F1E0-\U0001F1FF]', '', src)
         return clean
 
-    def fetch(self, url, cookies=None, headers=None, timeout=5, verify=True, stream=False, allow_redirects = True):
-        rsp = requests.get(url, cookies=cookies, headers=headers, timeout=timeout, verify=verify, stream=stream, allow_redirects=allow_redirects)
+    def fetch(self, url, params=None, cookies=None, headers=None, timeout=5, verify=True, stream=False, allow_redirects = True):
+        rsp = requests.get(url, params=params, cookies=cookies, headers=headers, timeout=timeout, verify=verify, stream=stream, allow_redirects=allow_redirects)
         rsp.encoding = 'utf-8'
         return rsp
 
-    def post(self, url, data, cookies=None, headers=None, timeout=5, verify=True, stream=False, allow_redirects = True):
-        rsp = requests.post(url, data=data, cookies=cookies, headers=headers, timeout=timeout, verify=verify, stream=stream, allow_redirects=allow_redirects)
+    def post(self, url, params=None, data, cookies=None, headers=None, timeout=5, verify=True, stream=False, allow_redirects = True):
+        rsp = requests.post(url, params=params, data=data, cookies=cookies, headers=headers, timeout=timeout, verify=verify, stream=stream, allow_redirects=allow_redirects)
         rsp.encoding = 'utf-8'
         return rsp
 
-    def postJson(self, url, json, cookies=None, headers=None, timeout=5, verify=True, stream=False, allow_redirects = True):
-        rsp = requests.post(url, json=json, cookies=cookies, headers=headers, timeout=timeout, verify=verify, stream=stream, allow_redirects=allow_redirects)
+    def postJson(self, url, params=None, json, cookies=None, headers=None, timeout=5, verify=True, stream=False, allow_redirects = True):
+        rsp = requests.post(url, params=params, json=json, cookies=cookies, headers=headers, timeout=timeout, verify=verify, stream=stream, allow_redirects=allow_redirects)
         rsp.encoding = 'utf-8'
         return rsp