From 5d08c8ee5d4946f469b6dc053d1df19957bd36a9 Mon Sep 17 00:00:00 2001
From: timw1971 <tim@accuix.com>
Date: Thu, 3 Aug 2017 13:38:42 +0100
Subject: [PATCH] Add files via upload

Added public functions to allow content to be uploaded using const char*. For some cases, this can remove the need for content to be copied into a String, and thus can be considerably more space-efficient.
---
 .../ESP8266WebServer/src/ESP8266WebServer.cpp | 22 +++++++++++++++++++
 .../ESP8266WebServer/src/ESP8266WebServer.h   |  2 ++
 2 files changed, 24 insertions(+)

diff --git a/libraries/ESP8266WebServer/src/ESP8266WebServer.cpp b/libraries/ESP8266WebServer/src/ESP8266WebServer.cpp
index bc41a5603b..c0d43f8b0c 100644
--- a/libraries/ESP8266WebServer/src/ESP8266WebServer.cpp
+++ b/libraries/ESP8266WebServer/src/ESP8266WebServer.cpp
@@ -292,6 +292,14 @@ void ESP8266WebServer::send(int code, const char* content_type, const String& co
       sendContent(content);
 }
 
+void ESP8266WebServer::send(int code, const char* content_type, const char* content, size_t contentLength) {
+  String header;
+  _prepareHeader(header, code, content_type, contentLength);
+  sendContent(header);
+
+  sendContent(content, contentLength);
+}
+
 void ESP8266WebServer::send_P(int code, PGM_P content_type, PGM_P content) {
     size_t contentLength = 0;
 
@@ -341,6 +349,20 @@ void ESP8266WebServer::sendContent(const String& content) {
   }
 }
 
+void ESP8266WebServer::sendContent(const char* content, size_t contentLength) {
+  const size_t unit_size = HTTP_DOWNLOAD_UNIT_SIZE;
+
+  while (contentLength) {
+    size_t will_send = (contentLength < unit_size) ? contentLength : unit_size;
+    size_t sent = _currentClient.write(content, will_send);
+    if (sent == 0) {
+      break;
+    }
+    contentLength -= sent;
+    content += sent;
+  }
+}
+
 void ESP8266WebServer::sendContent_P(PGM_P content) {
   sendContent_P(content, strlen_P(content));
 }
diff --git a/libraries/ESP8266WebServer/src/ESP8266WebServer.h b/libraries/ESP8266WebServer/src/ESP8266WebServer.h
index ab22fe659e..60330d9d1e 100644
--- a/libraries/ESP8266WebServer/src/ESP8266WebServer.h
+++ b/libraries/ESP8266WebServer/src/ESP8266WebServer.h
@@ -114,6 +114,7 @@ class ESP8266WebServer
   // content - actual content body
   void send(int code, const char* content_type = NULL, const String& content = String(""));
   void send(int code, char* content_type, const String& content);
+  void send(int code, const char* content_type, const char* content, size_t contentLength);
   void send(int code, const String& content_type, const String& content);
   void send_P(int code, PGM_P content_type, PGM_P content);
   void send_P(int code, PGM_P content_type, PGM_P content, size_t contentLength);
@@ -121,6 +122,7 @@ class ESP8266WebServer
   void setContentLength(size_t contentLength);
   void sendHeader(const String& name, const String& value, bool first = false);
   void sendContent(const String& content);
+  void sendContent(const char* content, size_t contentLength);
   void sendContent_P(PGM_P content);
   void sendContent_P(PGM_P content, size_t size);