From e81bb6f57ccf551426bc323b582ced25619202fc Mon Sep 17 00:00:00 2001
From: aesapronov <aesapronov@gmail.com>
Date: Thu, 4 Jul 2019 14:00:54 +0300
Subject: [PATCH] HTTPClient: Added possibility of sending POST with empty
 payload (#4275)

* Added possibility of sending POST with empty payload
Specification does not prohibit the sending of an empty POST requests. In this case "Content-Length: 0" should be set. See thread here: http://lists.w3.org/Archives/Public/ietf-http-wg/2010JulSep/0276.html
---
 libraries/ESP8266HTTPClient/src/ESP8266HTTPClient.cpp | 4 +---
 1 file changed, 1 insertion(+), 3 deletions(-)

diff --git a/libraries/ESP8266HTTPClient/src/ESP8266HTTPClient.cpp b/libraries/ESP8266HTTPClient/src/ESP8266HTTPClient.cpp
index 8d7880e4e..a7c3fb88a 100644
--- a/libraries/ESP8266HTTPClient/src/ESP8266HTTPClient.cpp
+++ b/libraries/ESP8266HTTPClient/src/ESP8266HTTPClient.cpp
@@ -656,9 +656,7 @@ int HTTPClient::sendRequest(const char * type, uint8_t * payload, size_t size)
             return returnError(HTTPC_ERROR_CONNECTION_REFUSED);
         }
 
-        if(payload && size > 0) {
-            addHeader(F("Content-Length"), String(size));
-        }
+        addHeader(F("Content-Length"), String(payload && size > 0 ? size : 0));
 
         // send Header
         if(!sendHeader(type)) {