Doubt button esp8266

Projects Programming
1

sorry for my English.
Hello, I am having a doubt with the esp8266, I am putting together a tool that through an arduino nano I receive information that is sent and displayed on a page through the esp8266, what I cannot do is generate a button that, when pressed, downloads in this case the "/data.txt" when pressing the button

#include <ESP8266WiFi.h>
#include <FS.h>
#include <ESP8266mDNS.h>
#include <ESPAsyncTCP.h>
#include <ESPAsyncWebServer.h>
#include <SPIFFSEditor.h>
#include <EEPROM.h>

#define BAUD_RATE 115200

const char *ssid = "Telecentrologger";
const char *password = "root3030"; 

AsyncWebServer server(80);
FSInfo fs_info;
File f;

void setup() {
  
  Serial.begin(BAUD_RATE);
  
  WiFi.mode(WIFI_STA);
  WiFi.softAP(ssid,password);
  
  EEPROM.begin(4096);
  SPIFFS.begin();
  
  MDNS.addService("http","tcp",80);

  f = SPIFFS.open("/data.txt", "a+");
  if(!f) Serial.println("Fallo al abrir el archivo");

  server.on("/", HTTP_GET, [](AsyncWebServerRequest *request){
    request->send(SPIFFS, "/data.txt", "text/plain");
  });

  server.on("/clear", HTTP_GET, [](AsyncWebServerRequest *request){
    f.close();
    f = SPIFFS.open("/data.txt", "w");
    request->send(200, "text/plain", "file cleared!");
  });
  
  server.begin();
}

void loop() {
  
  if(Serial.available()) {
    f.write(Serial.read());
  }
  
}
2

words like "arduino uno push button" can generate a result set that gives things like;

and more.

3

what happens is that I don't need a physical button, I need a button inside the page that generates the esp8266, I was searching but I couldn't find any help so that the button apart from appearing downloads that file that it generates

4

see the SimpleAuthentication example of the ESP8266WebServer library

5

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