Example image element (Equivalent to Hello World but with base64)

examples/HelloWorld_Image/HelloWorld_Image.ino

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+/*
+  HelloWorld.ino, Example for the AutoConnect library.
+  Copyright (c) 2019, Hieromon Ikasamo
+  https://github.com/Hieromon/AutoConnect
+
+  This software is released under the MIT License.
+  https://opensource.org/licenses/MIT
+*/
+/*
+  To experience this example, upload the JSON file which is style.json
+  from the data folder. Its file contains the attributes for the Caption
+  of AutoConnectText. You can change the elements for your realization.
+*/
+
+#if defined(ARDUINO_ARCH_ESP8266)
+#include <ESP8266WiFi.h>
+#include <ESP8266WebServer.h>
+typedef ESP8266WebServer WEBServer;
+#elif defined(ARDUINO_ARCH_ESP32)
+#include <WiFi.h>
+#include <WebServer.h>
+#include <SPIFFS.h>
+typedef WebServer WEBServer;
+#endif
+#include <FS.h>
+#include <AutoConnect.h>
+
+#define HELLO_URI   "/hello"
+#define PARAM_STYLE "/style.json"
+
+// Declare AutoConnectText with only a value.
+// Qualify the Caption by reading style attributes from the SPIFFS style.json file.
+ACImage(Caption, "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");
+
+//AutoConnectAux for the custom Web page.
+AutoConnectAux helloPage(HELLO_URI, "Hello", true, { Caption });
+AutoConnect portal;
+
+// JSON document loading buffer
+String ElementJson;
+
+// Redirects from root to the hello page.
+void onRoot() {
+  WEBServer& webServer = portal.host();
+  webServer.sendHeader("Location", String("http://") + webServer.client().localIP().toString() + String(HELLO_URI));
+  webServer.send(302, "text/plain", "");
+  webServer.client().flush();
+  webServer.client().stop();
+}
+
+// Load the attribute of the element to modify at runtime from external.
+String onHello(AutoConnectAux& aux, PageArgument& args) {
+  aux.loadElement(ElementJson);
+  return String();
+}
+
+// Load the element from specified file in SPIFFS.
+void loadParam(const char* fileName) {
+  SPIFFS.begin();
+  File param = SPIFFS.open(fileName, "r");
+  if (param) {
+    ElementJson = param.readString();
+    param.close();
+  }
+  SPIFFS.end();
+}
+
+void setup() {
+  delay(1000);
+  Serial.begin(115200);
+
+  loadParam(PARAM_STYLE);     // Pre-load the element from JSON.
+  helloPage.on(onHello);      // Register the attribute overwrite handler.
+  portal.join(helloPage);     // Join the hello page.
+  portal.begin();
+  
+  WEBServer& webServer = portal.host();
+  webServer.on("/", onRoot);  // Register the root page redirector.
+}
+
+void loop() {
+  portal.handleClient();
+}

examples/HelloWorld_Image/data/style.json

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+{
+  "name" : "Caption",
+  "type" : "ACImage",
+  "style": "text-align:center;font-size:24px;font-family:'Impact','Futura',sans-serif;color:tomato;"
+}