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// SPDX-License-Identifier: LGPL-3.0-or-later
// Copyright 2016-2025 Hristo Gochkov, Mathieu Carbou, Emil Muratov
//
// How to use CORS middleware
//
#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 AsyncCorsMiddleware cors;
void setup() {
Serial.begin(115200);
#ifndef CONFIG_IDF_TARGET_ESP32H2
WiFi.mode(WIFI_AP);
WiFi.softAP("esp-captive");
#endif
cors.setOrigin("http://192.168.4.1");
cors.setMethods("POST, GET, OPTIONS, DELETE");
cors.setHeaders("X-Custom-Header");
cors.setAllowCredentials(false);
cors.setMaxAge(600);
server.addMiddleware(&cors);
// Test CORS preflight request
// curl -v -X OPTIONS -H "origin: http://192.168.4.1" http://192.168.4.1/cors
//
// Test CORS request
// curl -v -H "origin: http://192.168.4.1" http://192.168.4.1/cors
//
// Test non-CORS request
// curl -v http://192.168.4.1/cors
//
server.on("/cors", HTTP_GET, [](AsyncWebServerRequest *request) {
request->send(200, "text/plain", "Hello, world!");
});
server.begin();
}
// not needed
void loop() {
delay(100);
}
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