fix websocket客户端连接过程中握手失败导致内存泄漏 (#1899)

* fix word err

* fix word err

* 增加mongo update 测试

* remove unused local variable

* fix websocket客户端连接过程中握手失败导致内存泄漏

lualib/http/websocket.lua

@@ -14,6 +14,7 @@ local pairs = pairs
 local error = error
 local string = string
 local xpcall = xpcall
+local pcall = pcall
 local debug = debug
 local table = table
 local tonumber = tonumber
@@ -481,7 +482,12 @@ function M.connect(url, header, timeout)
     local socket_id = sockethelper.connect(host_addr, host_port, timeout)
     local ws_obj = _new_client_ws(socket_id, protocol, hostname)
     ws_obj.addr = host
-    write_handshake(ws_obj, host_addr, uri, header)
+    
+    local is_ok,err = pcall(write_handshake, ws_obj, host_addr, uri, header)
+    if not is_ok then
+        _close_websocket(ws_obj)
+        error(err)
+    end
     return socket_id
 end