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// SPDX-License-Identifier: LGPL-3.0-or-later
// Copyright 2016-2025 Hristo Gochkov, Mathieu Carbou, Emil Muratov
//
// Show how to rate limit the server or some endpoints
//
#include <Arduino.h>
#ifdef ESP32
#include <AsyncTCP.h>
#include <WiFi.h>
#elif defined(ESP8266)
#include <ESP8266WiFi.h>
#include <ESPAsyncTCP.h>
#elif defined(TARGET_RP2040) || defined(TARGET_RP2350) || defined(PICO_RP2040) || defined(PICO_RP2350)
#include <RPAsyncTCP.h>
#include <WiFi.h>
#endif
#include <ESPAsyncWebServer.h>
static AsyncWebServer server(80);
static AsyncRateLimitMiddleware rateLimit;
void setup() {
Serial.begin(115200);
#ifndef CONFIG_IDF_TARGET_ESP32H2
WiFi.mode(WIFI_AP);
WiFi.softAP("esp-captive");
#endif
// maximum 5 requests per 10 seconds
rateLimit.setMaxRequests(5);
rateLimit.setWindowSize(10);
// run quickly several times:
//
// curl -v http://192.168.4.1/
//
server.on("/", HTTP_GET, [](AsyncWebServerRequest *request) {
request->send(200, "text/plain", "Hello, world!");
});
// run quickly several times:
//
// curl -v http://192.168.4.1/rate-limited
//
server
.on(
"/rate-limited", HTTP_GET,
[](AsyncWebServerRequest *request) {
request->send(200, "text/plain", "Hello, world!");
}
)
.addMiddleware(&rateLimit); // only rate limit this endpoint, but could be applied globally to the server
server.begin();
}
// not needed
void loop() {
delay(100);
}
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