Fix HTTPUpdate flash size check and add SPIFFS size check

libraries/HTTPUpdate/src/HTTPUpdate.cpp

@@ -118,6 +118,8 @@ String HTTPUpdate::getLastErrorString(void)
         return "Verify Bin Header Failed";
     case HTTP_UE_BIN_FOR_WRONG_FLASH:
         return "New Binary Does Not Fit Flash Size";
+    case HTTP_UE_NO_PARTITION:
+        return "Partition Could Not be Found";
     }
 
     return String();
@@ -229,14 +231,25 @@ HTTPUpdateResult HTTPUpdate::handleUpdate(HTTPClient& http, const String& curren
         if(len > 0) {
             bool startUpdate = true;
             if(spiffs) {
-// To do                size_t spiffsSize = ((size_t) &_SPIFFS_end - (size_t) &_SPIFFS_start);
-// To do                if(len > (int) spiffsSize) {
-// To do                    log_e("spiffsSize to low (%d) needed: %d\n", spiffsSize, len);
-// To do                    startUpdate = false;
-// To do                }
+                const esp_partition_t* _partition = esp_partition_find_first(ESP_PARTITION_TYPE_DATA, ESP_PARTITION_SUBTYPE_DATA_SPIFFS, NULL);
+                if(!_partition){
+                    _lastError = HTTP_UE_NO_PARTITION;
+                    return HTTP_UPDATE_FAILED;
+                }
+
+                if(len > _partition->size) {
+                    log_e("spiffsSize to low (%d) needed: %d\n", _partition->size, len);
+                    startUpdate = false;
+                }
             } else {
-                if(len > (int) ESP.getFreeSketchSpace()) {
-                    log_e("FreeSketchSpace to low (%d) needed: %d\n", ESP.getFreeSketchSpace(), len);
+                const esp_partition_t* _partition = esp_ota_get_next_update_partition(NULL);
+                if(!_partition){
+                    _lastError = HTTP_UE_NO_PARTITION;
+                    return HTTP_UPDATE_FAILED;
+                }
+
+                if(len > _partition->size) {
+                    log_e("FreeSketchSpace to low (%d) needed: %d\n", _partition->size, len);
                     startUpdate = false;
                 }
             }
@@ -366,6 +379,10 @@ bool HTTPUpdate::runUpdate(Stream& in, uint32_t size, String md5, int command)
         }
     }
 
+// To do: the SHA256 could be checked if the server sends it
+
+    delay(0);
+
     if(Update.writeStream(in) != size) {
         _lastError = Update.getError();
         Update.printError(error);

libraries/HTTPUpdate/src/HTTPUpdate.h

@@ -42,6 +42,7 @@
 #define HTTP_UE_SERVER_FAULTY_MD5           (-105)
 #define HTTP_UE_BIN_VERIFY_HEADER_FAILED    (-106)
 #define HTTP_UE_BIN_FOR_WRONG_FLASH         (-107)
+#define HTTP_UE_NO_PARTITION                (-108)
 
 enum HTTPUpdateResult {
     HTTP_UPDATE_FAILED,

libraries/WiFi/src/WiFiClient.cpp

@@ -398,6 +398,10 @@ int WiFiClient::peek()
 
 int WiFiClient::available()
 {
+    if(!_rxBuffer)
+    {
+        return 0;
+    }
     int res = _rxBuffer->available();
     if(_rxBuffer->failed()) {
         log_e("%d", errno);