From 68c451aa823d8b8b68717b570bb7b737aec91934 Mon Sep 17 00:00:00 2001
From: Thomas Basler <thomas@familie-basler.net>
Date: Sun, 22 May 2022 22:42:06 +0200
Subject: [PATCH] Serve webapp from flash instead of LITTLEFS

This allows a web based firmware update by just replacing one bin file
---
 platformio.ini |  1 +
 src/WebApi.cpp | 41 ++++++++++++++++++++++++++++++++++++++++-
 2 files changed, 41 insertions(+), 1 deletion(-)

diff --git a/platformio.ini b/platformio.ini
index 82a5580..d0442c8 100644
--- a/platformio.ini
+++ b/platformio.ini
@@ -20,6 +20,7 @@ platform = espressif32
 build_flags =
     ${env.build_flags}
     -D=${PIOENV}
+    -DCOMPONENT_EMBED_FILES=data/index.html.gz:data/zones.json.gz:data/favicon.ico:data/js/app.js.gz
 
 lib_deps =
     https://github.com/me-no-dev/ESPAsyncWebServer.git
diff --git a/src/WebApi.cpp b/src/WebApi.cpp
index d076ee3..a4c9eea 100644
--- a/src/WebApi.cpp
+++ b/src/WebApi.cpp
@@ -17,6 +17,16 @@ WebApiClass::WebApiClass()
 {
 }
 
+extern const uint8_t file_index_html_start[] asm("_binary_data_index_html_gz_start");
+extern const uint8_t file_favicon_ico_start[] asm("_binary_data_favicon_ico_start");
+extern const uint8_t file_zones_json_start[] asm("_binary_data_zones_json_gz_start");
+extern const uint8_t file_app_js_start[] asm("_binary_data_js_app_js_gz_start");
+
+extern const uint8_t file_index_html_end[] asm("_binary_data_index_html_gz_end");
+extern const uint8_t file_favicon_ico_end[] asm("_binary_data_favicon_ico_end");
+extern const uint8_t file_zones_json_end[] asm("_binary_data_zones_json_gz_end");
+extern const uint8_t file_app_js_end[] asm("_binary_data_js_app_js_gz_end");
+
 void WebApiClass::init()
 {
     using namespace std::placeholders;
@@ -45,7 +55,36 @@ void WebApiClass::init()
     _server.on("/api/inverter/edit", HTTP_POST, std::bind(&WebApiClass::onInverterEdit, this, _1));
     _server.on("/api/inverter/del", HTTP_POST, std::bind(&WebApiClass::onInverterDelete, this, _1));
 
-    _server.serveStatic("/", LittleFS, "/", "max-age=86400").setDefaultFile("index.html");
+    _server.on("/", HTTP_GET, [](AsyncWebServerRequest* request) {
+        AsyncWebServerResponse *response = request->beginResponse_P(200, "text/html", file_index_html_start, file_index_html_end - file_index_html_start);
+        response->addHeader("Content-Encoding", "gzip");
+        request->send(response);
+    });
+
+    _server.on("/index.html", HTTP_GET, [](AsyncWebServerRequest* request) {
+        AsyncWebServerResponse *response = request->beginResponse_P(200, "text/html", file_index_html_start, file_index_html_end - file_index_html_start);
+        response->addHeader("Content-Encoding", "gzip");
+        request->send(response);
+    });
+
+    _server.on("/favicon.ico", HTTP_GET, [](AsyncWebServerRequest* request) {
+        AsyncWebServerResponse *response = request->beginResponse_P(200, "image/x-icon", file_favicon_ico_start, file_favicon_ico_end - file_favicon_ico_start);
+        response->addHeader("Content-Encoding", "gzip");
+        request->send(response);
+    });
+
+    _server.on("/zones.json", HTTP_GET, [](AsyncWebServerRequest* request) {
+        AsyncWebServerResponse *response = request->beginResponse_P(200, "application/json", file_zones_json_start, file_zones_json_end - file_zones_json_start);
+        response->addHeader("Content-Encoding", "gzip");
+        request->send(response);
+    });
+
+    _server.on("/js/app.js", HTTP_GET, [](AsyncWebServerRequest* request) {
+        AsyncWebServerResponse *response = request->beginResponse_P(200, "text/javascript", file_app_js_start, file_app_js_end - file_app_js_start);
+        response->addHeader("Content-Encoding", "gzip");
+        request->send(response);
+    });
+
     _server.onNotFound(std::bind(&WebApiClass::onNotFound, this, _1));
     _server.begin();
 }