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1 files changed, 60 insertions, 0 deletions

diff --git a/libraries/ESP_Async_WebServer/examples/CORS/CORS.ino b/libraries/ESP_Async_WebServer/examples/CORS/CORS.ino
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--- /dev/null
+++ b/libraries/ESP_Async_WebServer/examples/CORS/CORS.ino
@@ -0,0 +1,60 @@
+// 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);
+}