From fd0d75ee167d44c83b79d103f71b212846975958 Mon Sep 17 00:00:00 2001
From: Thomas Kolb <cfr34k-git@tkolb.de>
Date: Wed, 20 Nov 2019 22:42:35 +0100
Subject: [PATCH] HTTPServer: serve static file from the SPIFFS

---
 include/HTTPServer.h |  2 ++
 src/HTTPServer.cpp   | 28 ++++++++++++++++++++++------
 2 files changed, 24 insertions(+), 6 deletions(-)

diff --git a/include/HTTPServer.h b/include/HTTPServer.h
index 1f8162f..8256050 100644
--- a/include/HTTPServer.h
+++ b/include/HTTPServer.h
@@ -28,6 +28,8 @@ class HTTPServer
 
         static void serverTask(void *arg);
 
+        static void serveFile(String filename, httpsserver::HTTPResponse *res);
+
         // handlers
         static void handleRoot(httpsserver::HTTPRequest *req, httpsserver::HTTPResponse *res);
         static void handleColor(httpsserver::HTTPRequest *req, httpsserver::HTTPResponse *res);
diff --git a/src/HTTPServer.cpp b/src/HTTPServer.cpp
index dbedffe..8fc5354 100644
--- a/src/HTTPServer.cpp
+++ b/src/HTTPServer.cpp
@@ -1,5 +1,7 @@
 /* HTTP Server setup and handler functions */
 
+#include <SPIFFS.h>
+
 #include "HTTPServer.h"
 
 #include "Fader.h"
@@ -10,14 +12,28 @@ HTTPServer::HTTPServer(void)
     m_server = new httpsserver::HTTPServer();
 }
 
+void HTTPServer::serveFile(String filename, httpsserver::HTTPResponse *res)
+{
+    uint8_t buf[1024];
+    File f = SPIFFS.open(filename.c_str(), "r");
+
+    size_t nread = 1;
+    while(nread > 0) {
+        nread = f.readBytes(reinterpret_cast<char*>(buf), 1024);
+        if(nread <= 0) {
+            break;
+        }
+
+        res->write(buf, nread);
+    }
+
+    f.close();
+}
+
 void HTTPServer::handleRoot(httpsserver::HTTPRequest *req, httpsserver::HTTPResponse *res)
 {
-    res->setHeader("Content-Type", "text/plain");
-
-    res->println("Hello World!");
-    res->print("Uptime: ");
-    res->print(millis());
-    res->println(" ms");
+    serveFile("/index.html", res);
+    res->setHeader("Content-Type", "text/html");
 }
 
 static void error400(httpsserver::HTTPResponse *res, const std::string &reason)