ESP8266WebServer cookie save problem

Projects Programming
6

As this problem is still not solved, I've simplified the code as much as possible to just read a cookie when connecting, showing it, and create a new one, which should show up at the next logon etc ...

This is the code used

#include <ESP8266WiFi.h>
#include <ESP8266WebServer.h>

const char* ssid = "ESP8266_SoftAP";
ESP8266WebServer server(80);

void handleRoot() {
  String storedCookieValue = "None";
  String newCookieValue = String(millis());

  if (server.hasHeader("Cookie")) {
    String cookie = server.header("Cookie");
    int pos = cookie.indexOf("clientID=");
    if (pos != -1) {
      pos += 9; // Length of "clientID="
      int endPos = cookie.indexOf(";", pos);
      if (endPos == -1) endPos = cookie.length();
      storedCookieValue = cookie.substring(pos, endPos);
    }
  }

  server.sendHeader("Set-Cookie", "clientID=" + newCookieValue + "; Path=/;");
  Serial.println("Stored Cookie: " + storedCookieValue);
  Serial.println("New Cookie: " + newCookieValue);

  String html = "<html>"
                "<head>"
                "<style>"
                "body { display: flex; justify-content: center; align-items: center; height: 100vh; margin: 0; font-family: Arial, sans-serif; background-color: #f0f0f0; }"
                "div { text-align: center; background: #fff; padding: 40px; border-radius: 10px; box-shadow: 0 0 10px rgba(0,0,0,0.1); }"
                "h1 { font-size: 3em; margin-bottom: 20px; }"
                "p { font-size: 1.5em; margin-bottom: 20px; }"
                "</style>"
                "</head>"
                "<body>"
                "<div>"
                "<h1>Stored Cookie Value: " + storedCookieValue + "</h1>"
                "<p>New Cookie Value: " + newCookieValue + "</p>"
                "</div>"
                "</body>"
                "</html>";
  server.send(200, "text/html", html);
}

void setup() {
  Serial.begin(115200);
  WiFi.softAP(ssid);

  IPAddress IP = WiFi.softAPIP();
  Serial.print("AP IP address: ");
  Serial.println(IP);

  server.on("/", handleRoot);
  server.onNotFound([]() {
    server.send(404, "text/plain", "Not found");
  });

  server.begin();
}

void loop() {
  server.handleClient();
}

And this is the result on the serial monitor for the first logon (which is strange that it shows it 2 times)
17:07:11.008 -> Stored Cookie: None
17:07:11.008 -> New Cookie: 33970
17:07:29.009 -> Stored Cookie: None
17:07:29.009 -> New Cookie: 51951

And this for the second logon
17:08:35.230 -> Stored Cookie: None
17:08:35.230 -> New Cookie: 118209

I want to use SoftAP on the NODEMCU as a stand-alone device without internet access.

Any help to solve this will be greatly appreciated (ChatGPT doesn't manage to solve the issue :slight_smile