removed lambda function

include/WebApi_database.h

@@ -12,7 +12,7 @@ public:
     void loop();
     bool write(float energy);
 
-    struct Data {
+    struct pvData {
         uint8_t	tm_year;
         uint8_t tm_mon;
         uint8_t tm_mday;
@@ -22,6 +22,8 @@ public:
 
 private:
     void onDatabase(AsyncWebServerRequest* request);
+    static size_t readchunk(uint8_t* buffer, size_t maxLen, size_t index);
+    static size_t readchunk1(uint8_t* buffer, size_t maxLen, size_t index);
     
     AsyncWebServer* _server;
 };

src/WebApi_database.cpp

@@ -48,7 +48,7 @@ bool WebApiDatabaseClass::write(float energy)
         return (false);
     // MessageOutput.println("Energy difference > 0");
 
-    struct Data d;
+    struct pvData d;
     d.tm_hour = old_hour;
     old_hour = timeinfo.tm_hour;
     d.tm_year = timeinfo.tm_year - 100; // year counting from 2000
@@ -70,27 +70,22 @@ bool WebApiDatabaseClass::write(float energy)
         MessageOutput.println("Failed to append to database.");
         return (false);
     }
-    f.write((const uint8_t*)&d, sizeof(Data));
+    f.write((const uint8_t*)&d, sizeof(pvData));
     f.close();
     // MessageOutput.println("Write data point.");
     return (true);
 }
 
-void WebApiDatabaseClass::onDatabase(AsyncWebServerRequest* request)
+// read chunk from database
+size_t WebApiDatabaseClass::readchunk(uint8_t* buffer, size_t maxLen, size_t index)
 {
-    if (!WebApi.checkCredentialsReadonly(request)) {
-        return;
-    }
-
-    AsyncWebServerResponse* response = request->beginChunkedResponse("application/json",
-        [](uint8_t* buffer, size_t maxLen, size_t index) -> size_t {
     static bool first = true;
     static bool last = false;
     static File f;
     uint8_t* pr = buffer;
-            uint8_t* pre = pr + maxLen - 30;
+    uint8_t* pre = pr + maxLen - 50;
     size_t r;
-            struct Data d;
+    struct pvData d;
 
     if (first) {
         f = LittleFS.open(DATABASE_FILENAME, "r", false);
@@ -100,7 +95,7 @@ void WebApiDatabaseClass::onDatabase(AsyncWebServerRequest* request)
         *pr++ = '[';
     }
     while (true) {
-                r = f.read((uint8_t*)&d, sizeof(Data)); // read from database
+        r = f.read((uint8_t*)&d, sizeof(pvData)); // read from database
         if (r <= 0) {
             if (last) {
                 f.close();
@@ -125,8 +120,23 @@ void WebApiDatabaseClass::onDatabase(AsyncWebServerRequest* request)
         if (pr >= pre)
             return (pr - buffer); // buffer full, return number of chars
     }
-        });
+}
 
+size_t WebApiDatabaseClass::readchunk1(uint8_t* buffer, size_t maxLen, size_t index)
+{
+    size_t x = readchunk(buffer, maxLen, index);
+    MessageOutput.println("----------");
+    MessageOutput.println(maxLen);
+    MessageOutput.println(x);
+    return(x);
+}
+
+void WebApiDatabaseClass::onDatabase(AsyncWebServerRequest* request)
+{
+    if (!WebApi.checkCredentialsReadonly(request)) {
+        return;
+    }
+    AsyncWebServerResponse* response = request->beginChunkedResponse("application/json", readchunk);
     request->send(response);
 }
 

webapp/src/components/BarChart.vue

@@ -1,12 +1,10 @@
 <template>
     <div class="card" :class="{}">
-        <div v-if="dataBase.valid_data">
         <div class="card-header">
             {{ $t('chart.LastDay') }}
         </div>
         <GoogleChart />
     </div>
-    </div>
 </template>
 
 <script lang="ts">

webapp/src/components/CalendarChart.vue

@@ -1,13 +1,9 @@
 <template>
     <div class="card" :class="{}">
-        <div v-if="dataBase.valid_data">
         <div class="card-header">
         </div>
-            <div>
         <GoogleChart />
     </div>
-        </div>
-    </div>
 </template>
 
 <script lang="ts">

webapp/src/views/HomeView.vue

@@ -16,7 +16,7 @@
                     </button>
                 </div>
             </div>
-            <BarChart v-bind:dataBase="dataBase" dataLoading="dataLoading" />
+            <BarChart v-bind:dataBase="dataBase" />
             <CalendarChart v-bind:dataBase="dataBase" />
 
             <div class="tab-content" id="v-pills-tabContent" :class="{