From 4c4a6b8d3777857f1c08de4d401f1b608fc8dae3 Mon Sep 17 00:00:00 2001
From: Tomas Pilny <tomas.pilny@espressif.com>
Date: Fri, 18 Aug 2023 14:10:31 +0200
Subject: [PATCH 1/2] Reimplemented flush in WiFiClient

---
 libraries/WiFi/src/WiFiClient.cpp | 29 +++++++++--------------------
 1 file changed, 9 insertions(+), 20 deletions(-)

diff --git a/libraries/WiFi/src/WiFiClient.cpp b/libraries/WiFi/src/WiFiClient.cpp
index 9e2a85f5dea..23484ae30b6 100644
--- a/libraries/WiFi/src/WiFiClient.cpp
+++ b/libraries/WiFi/src/WiFiClient.cpp
@@ -153,6 +153,13 @@ class WiFiClientRxBuffer {
     size_t available(){
         return _fill - _pos + r_available();
     }
+
+    void flush(){
+        if(r_available()){
+            fillBuffer();
+        }
+        _pos = _fill;
+    }
 };
 
 class WiFiClientSocketHandle {
@@ -501,26 +508,8 @@ int WiFiClient::available()
 // Though flushing means to send all pending data,
 // seems that in Arduino it also means to clear RX
 void WiFiClient::flush() {
-    int res;
-    size_t a = available(), toRead = 0;
-    if(!a){
-        return;//nothing to flush
-    }
-    uint8_t * buf = (uint8_t *)malloc(WIFI_CLIENT_FLUSH_BUFFER_SIZE);
-    if(!buf){
-        return;//memory error
-    }
-    while(a){
-        toRead = (a>WIFI_CLIENT_FLUSH_BUFFER_SIZE)?WIFI_CLIENT_FLUSH_BUFFER_SIZE:a;
-        res = recv(fd(), buf, toRead, MSG_DONTWAIT);
-        if(res < 0) {
-            log_e("fail on fd %d, errno: %d, \"%s\"", fd(), errno, strerror(errno));
-            stop();
-            break;
-        }
-        a -= res;
-    }
-    free(buf);
+#ifdef ARDUINO_DEBUG_LEVEL
+    _rxBuffer->flush();
 }
 
 uint8_t WiFiClient::connected()

From dd091755eeb451c12685280c2d1e99aab3d797c4 Mon Sep 17 00:00:00 2001
From: Tomas Pilny <tomas.pilny@espressif.com>
Date: Fri, 18 Aug 2023 15:02:20 +0200
Subject: [PATCH 2/2] Removed forgotten #ifdef

---
 libraries/WiFi/src/WiFiClient.cpp | 1 -
 1 file changed, 1 deletion(-)

diff --git a/libraries/WiFi/src/WiFiClient.cpp b/libraries/WiFi/src/WiFiClient.cpp
index 23484ae30b6..85c348327dc 100644
--- a/libraries/WiFi/src/WiFiClient.cpp
+++ b/libraries/WiFi/src/WiFiClient.cpp
@@ -508,7 +508,6 @@ int WiFiClient::available()
 // Though flushing means to send all pending data,
 // seems that in Arduino it also means to clear RX
 void WiFiClient::flush() {
-#ifdef ARDUINO_DEBUG_LEVEL
     _rxBuffer->flush();
 }