Merge pull request #280 from ESP32Async/issue/279

Correctly support form POST with text/plain content type

Author: mathieucarbou

src/WebRequest.cpp

@@ -7,7 +7,9 @@
 #include "literals.h"
 #include <cstring>
 
-#define __is_param_char(c) ((c) && ((c) != '{') && ((c) != '[') && ((c) != '&') && ((c) != '='))
+static inline bool isParamChar(char c) {
+  return ((c) && ((c) != '{') && ((c) != '[') && ((c) != '&') && ((c) != '='));
+}
 
 static void doNotDelete(AsyncWebServerRequest *) {}
 
@@ -183,9 +185,12 @@ void AsyncWebServerRequest::_onData(void *buf, size_t len) {
         if (_parsedLength == 0) {
           if (_contentType.startsWith(T_app_xform_urlencoded)) {
             _isPlainPost = true;
-          } else if (_contentType == T_text_plain && __is_param_char(((char *)buf)[0])) {
+          } else if (_contentType == T_text_plain && isParamChar(((char *)buf)[0])) {
             size_t i = 0;
-            while (i < len && __is_param_char(((char *)buf)[i++]));
+            char ch;
+            do {
+              ch = ((char *)buf)[i];
+            } while (i++ < len && isParamChar(ch));
             if (i < len && ((char *)buf)[i - 1] == '=') {
               _isPlainPost = true;
             }