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authorschererleander <leander@schererleander.de>2026-01-20 08:34:54 +0100
committerschererleander <leander@schererleander.de>2026-01-20 08:34:54 +0100
commit85ea4e995a75abe061f6fc375ea0481084dddd43 (patch)
tree7eb5d57653ecd8f041aeac4e68d7d554c1168681 /libraries/ESP_Async_WebServer/examples/Middleware
initial commitHEADmain
Diffstat (limited to 'libraries/ESP_Async_WebServer/examples/Middleware')
-rw-r--r--libraries/ESP_Async_WebServer/examples/Middleware/Middleware.ino82
1 files changed, 82 insertions, 0 deletions
diff --git a/libraries/ESP_Async_WebServer/examples/Middleware/Middleware.ino b/libraries/ESP_Async_WebServer/examples/Middleware/Middleware.ino
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+// SPDX-License-Identifier: LGPL-3.0-or-later
+// Copyright 2016-2025 Hristo Gochkov, Mathieu Carbou, Emil Muratov
+
+//
+// Show how to sue 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);
+
+// New middleware classes can be created!
+class MyMiddleware : public AsyncMiddleware {
+public:
+ void run(AsyncWebServerRequest *request, ArMiddlewareNext next) override {
+ Serial.printf("Before handler: %s %s\n", request->methodToString(), request->url().c_str());
+ next(); // continue middleware chain
+ Serial.printf("After handler: response code=%d\n", request->getResponse()->code());
+ }
+};
+
+void setup() {
+ Serial.begin(115200);
+
+#ifndef CONFIG_IDF_TARGET_ESP32H2
+ WiFi.mode(WIFI_AP);
+ WiFi.softAP("esp-captive");
+#endif
+
+ // add a global middleware to the server
+ server.addMiddleware(new MyMiddleware());
+
+ // Test with:
+ //
+ // - curl -v http://192.168.4.1/ => 200 OK
+ // - curl -v http://192.168.4.1/?user=anon => 403 Forbidden
+ // - curl -v http://192.168.4.1/?user=foo => 200 OK
+ // - curl -v http://192.168.4.1/?user=error => 400 ERROR
+ //
+ AsyncCallbackWebHandler &handler = server.on("/", HTTP_GET, [](AsyncWebServerRequest *request) {
+ Serial.printf("In Handler: %s %s\n", request->methodToString(), request->url().c_str());
+ request->send(200, "text/plain", "Hello, world!");
+ });
+
+ // add a middleware to this handler only to send 403 if the user is anon
+ handler.addMiddleware([](AsyncWebServerRequest *request, ArMiddlewareNext next) {
+ Serial.println("Checking user=anon");
+ if (request->hasParam("user") && request->getParam("user")->value() == "anon") {
+ request->send(403, "text/plain", "Forbidden");
+ } else {
+ next();
+ }
+ });
+
+ // add a middleware to this handler that will replace the previously created response by another one
+ handler.addMiddleware([](AsyncWebServerRequest *request, ArMiddlewareNext next) {
+ next();
+ Serial.println("Checking user=error");
+ if (request->hasParam("user") && request->getParam("user")->value() == "error") {
+ request->send(400, "text/plain", "ERROR");
+ }
+ });
+
+ server.begin();
+}
+
+// not needed
+void loop() {
+ delay(100);
+}