Add HttpClient::handleNetworkStatusChanged to clear DNS cache

cocos/network/HttpClient.cpp

@@ -109,6 +109,8 @@ HttpClient::HttpClient()
 
     _service = new yasio::io_service(HttpClient::MAX_CHANNELS);
     _service->set_option(yasio::YOPT_S_DEFERRED_EVENT, 0);
+    _service->set_option(yasio::YOPT_S_DNS_QUERIES_TIMEOUT, 3);
+    _service->set_option(yasio::YOPT_S_DNS_QUERIES_TRIES, 1);
     _service->start([=](yasio::event_ptr&& e) { handleNetworkEvent(e.get()); });
 
     for (int i = 0; i < HttpClient::MAX_CHANNELS; ++i) {
@@ -141,6 +143,11 @@ void HttpClient::setDispatchOnWorkThread(bool bVal)
         _scheduler->schedule([=](float) { dispatchResponseCallbacks(); }, this, 0, false, "#");
 }
 
+void HttpClient::handleNetworkStatusChanged()
+{
+    _service->set_option(YOPT_S_DNS_DIRTY, 1);
+}
+
 bool HttpClient::send(HttpRequest* request) {
     if (!request)
         return false;

cocos/network/HttpClient.h

@@ -188,6 +188,11 @@ public:
 
     void setDispatchOnWorkThread(bool bVal);
     bool isDispatchOnWorkThread() const { return _dispatchOnWorkThread; }
+
+    /*
+    * When the device network status chagned, you should invoke this function
+    */
+    void handleNetworkStatusChanged();
         
 private:
     HttpClient();

thirdparty/yasio/detail/errc.hpp

@@ -0,0 +1,47 @@
+//////////////////////////////////////////////////////////////////////////////////////////
+// A multi-platform support c++11 library with focus on asynchronous socket I/O for any
+// client application.
+//////////////////////////////////////////////////////////////////////////////////////////
+/*
+The MIT License (MIT)
+Copyright (c) 2012-2021 HALX99
+Permission is hereby granted, free of charge, to any person obtaining a copy
+of this software and associated documentation files (the "Software"), to deal
+in the Software without restriction, including without limitation the rights
+to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+copies of the Software, and to permit persons to whom the Software is
+furnished to do so, subject to the following conditions:
+The above copyright notice and this permission notice shall be included in all
+copies or substantial portions of the Software.
+THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
+SOFTWARE.
+*/
+#ifndef YAISO__ERRC_HPP
+#define YAISO__ERRC_HPP
+
+namespace yasio
+{
+namespace errc
+{
+enum
+{
+  no_error              = 0,   // No error.
+  read_timeout          = -28, // The remote host did not respond after a period of time.
+  invalid_packet        = -27, // Invalid packet.
+  resolve_host_failed   = -26, // Resolve host failed.
+  no_available_address  = -25, // No available address to connect.
+  shutdown_by_localhost = -24, // Local shutdown the connection.
+  ssl_handshake_failed  = -23, // SSL handshake failed.
+  ssl_write_failed      = -22, // SSL write failed.
+  ssl_read_failed       = -21, // SSL read failed.
+  eof                   = -20, // end of file.
+};
+}
+} // namespace yasio
+
+#endif

thirdparty/yasio/yasio.hpp

@@ -48,6 +48,7 @@ SOFTWARE.
 #include "yasio/detail/select_interrupter.hpp"
 #include "yasio/detail/concurrent_queue.hpp"
 #include "yasio/detail/utils.hpp"
+#include "yasio/detail/errc.hpp"
 #include "yasio/cxx17/memory.hpp"
 #include "yasio/cxx17/string_view.hpp"
 #include "yasio/xxsocket.hpp"
@@ -154,8 +155,8 @@ enum
   // see also: YOPT_S_DNS_QUERIES_TIMEOUT
   YOPT_S_DNS_QUERIES_TIMEOUTMS,
 
-  // Set dns queries tries when timeout reached, default is: 5
+  // Set dns queries tries when timeout reached, default is: 4
-  // params: dns_queries_tries : int(5)
+  // params: dns_queries_tries : int(4)
   // remarks:
   //        a. this option must be set before 'io_service::start'
   //        b. relative option: YOPT_S_DNS_QUERIES_TIMEOUT
@@ -300,23 +301,6 @@ enum
   YLOG_E,
 };
 
-namespace errc
-{
-enum
-{
-  no_error              = 0,   // No error.
-  read_timeout          = -28, // The remote host did not respond after a period of time.
-  invalid_packet        = -27, // Invalid packet.
-  resolve_host_failed   = -26, // Resolve host failed.
-  no_available_address  = -25, // No available address to connect.
-  shutdown_by_localhost = -24, // Local shutdown the connection.
-  ssl_handshake_failed  = -23, // SSL handshake failed.
-  ssl_write_failed      = -22, // SSL write failed.
-  ssl_read_failed       = -21, // SSL read failed.
-  eof                   = -20, // end of file.
-};
-}
-
 // class fwds
 class highp_timer;
 class io_send_op;