Added webapi endpoints to download/upload end delete configuration

include/WebApi.h

@@ -1,6 +1,7 @@
 // SPDX-License-Identifier: GPL-2.0-or-later
 #pragma once
 
+#include "WebApi_config.h"
 #include "WebApi_devinfo.h"
 #include "WebApi_dtu.h"
 #include "WebApi_eventlog.h"
@@ -25,6 +26,7 @@ private:
     AsyncWebServer _server;
     AsyncEventSource _events;
 
+    WebApiConfigClass _webApiConfig;
     WebApiDevInfoClass _webApiDevInfo;
     WebApiDtuClass _webApiDtu;
     WebApiEventlogClass _webApiEventlog;

include/WebApi_config.h

@@ -0,0 +1,18 @@
+// SPDX-License-Identifier: GPL-2.0-or-later
+#pragma once
+
+#include <ESPAsyncWebServer.h>
+
+class WebApiConfigClass {
+public:
+    void init(AsyncWebServer* server);
+    void loop();
+
+private:
+    void onConfigGet(AsyncWebServerRequest* request);
+    void onConfigDelete(AsyncWebServerRequest* request);
+    void onConfigUploadFinish(AsyncWebServerRequest* request);
+    void onConfigUpload(AsyncWebServerRequest* request, String filename, size_t index, uint8_t* data, size_t len, bool final);
+
+    AsyncWebServer* _server;
+};

src/WebApi.cpp

@@ -17,6 +17,7 @@ void WebApiClass::init()
 {
     _server.addHandler(&_events);
 
+    _webApiConfig.init(&_server);
     _webApiDevInfo.init(&_server);
     _webApiDtu.init(&_server);
     _webApiEventlog.init(&_server);
@@ -35,6 +36,7 @@ void WebApiClass::init()
 
 void WebApiClass::loop()
 {
+    _webApiConfig.loop();
     _webApiDevInfo.loop();
     _webApiDtu.loop();
     _webApiEventlog.loop();

src/WebApi_config.cpp

@@ -0,0 +1,125 @@
+// SPDX-License-Identifier: GPL-2.0-or-later
+/*
+ * Copyright (C) 2022 Thomas Basler and others
+ */
+#include "WebApi_config.h"
+#include "ArduinoJson.h"
+#include "AsyncJson.h"
+#include "Configuration.h"
+#include <LittleFS.h>
+
+void WebApiConfigClass::init(AsyncWebServer* server)
+{
+    using std::placeholders::_1;
+    using std::placeholders::_2;
+    using std::placeholders::_3;
+    using std::placeholders::_4;
+    using std::placeholders::_5;
+    using std::placeholders::_6;
+
+    _server = server;
+
+    _server->on("/api/config/get", HTTP_GET, std::bind(&WebApiConfigClass::onConfigGet, this, _1));
+    _server->on("/api/config/delete", HTTP_POST, std::bind(&WebApiConfigClass::onConfigDelete, this, _1));
+    _server->on("/api/config/upload", HTTP_POST,
+        std::bind(&WebApiConfigClass::onConfigUploadFinish, this, _1),
+        std::bind(&WebApiConfigClass::onConfigUpload, this, _1, _2, _3, _4, _5, _6));
+}
+
+void WebApiConfigClass::loop()
+{
+}
+
+void WebApiConfigClass::onConfigGet(AsyncWebServerRequest* request)
+{
+    request->send(LittleFS, CONFIG_FILENAME, String(), true);
+}
+
+void WebApiConfigClass::onConfigDelete(AsyncWebServerRequest* request)
+{
+    AsyncJsonResponse* response = new AsyncJsonResponse();
+    JsonObject retMsg = response->getRoot();
+    retMsg[F("type")] = F("warning");
+
+    if (!request->hasParam("data", true)) {
+        retMsg[F("message")] = F("No values found!");
+        response->setLength();
+        request->send(response);
+        return;
+    }
+
+    String json = request->getParam("data", true)->value();
+
+    if (json.length() > 1024) {
+        retMsg[F("message")] = F("Data too large!");
+        response->setLength();
+        request->send(response);
+        return;
+    }
+
+    DynamicJsonDocument root(1024);
+    DeserializationError error = deserializeJson(root, json);
+
+    if (error) {
+        retMsg[F("message")] = F("Failed to parse data!");
+        response->setLength();
+        request->send(response);
+        return;
+    }
+
+    if (!(root.containsKey("delete"))) {
+        retMsg[F("message")] = F("Values are missing!");
+        response->setLength();
+        request->send(response);
+        return;
+    }
+
+    if (root[F("delete")].as<bool>() == false) {
+        retMsg[F("message")] = F("Not deleted anything!");
+        response->setLength();
+        request->send(response);
+        return;
+    }
+
+    retMsg[F("type")] = F("success");
+    retMsg[F("message")] = F("Configuration resettet. Rebooting now...");
+
+    response->setLength();
+    request->send(response);
+
+    LittleFS.remove(CONFIG_FILENAME);
+    ESP.restart();
+}
+
+void WebApiConfigClass::onConfigUploadFinish(AsyncWebServerRequest* request)
+{
+    // the request handler is triggered after the upload has finished...
+    // create the response, add header, and send response
+
+    AsyncWebServerResponse* response = request->beginResponse(200, "text/plain", "OK");
+    response->addHeader("Connection", "close");
+    response->addHeader("Access-Control-Allow-Origin", "*");
+    request->send(response);
+    yield();
+    delay(1000);
+    yield();
+    ESP.restart();
+}
+
+void WebApiConfigClass::onConfigUpload(AsyncWebServerRequest* request, String filename, size_t index, uint8_t* data, size_t len, bool final)
+{
+    if (!index) {
+        // open the file on first call and store the file handle in the request object
+        request->_tempFile = LittleFS.open(CONFIG_FILENAME, "w");
+    }
+
+    if (len) {
+        // stream the incoming chunk to the opened file
+        request->_tempFile.write(data, len);
+    }
+
+    if (final) {
+        // close the file handle as the upload is now done
+        request->_tempFile.close();
+    }
+}