void send(int code, const String& contentType = String(), const String& content = String());

request->send(200, textPlainStr, ArduinoStr);

void send(int code, const String& contentType, const char *content, bool nonDetructiveSend = true);    // RSMOD

request->send(200, textPlainStr, cStr);

void send(int code, const String& contentType, const char *content, bool nonDetructiveSend = true);    // RSMOD

request->send(200, textPlainStr, cStr, false);

#define USING_CORE_ESP32_CORE_V200_PLUS       false

request->version();       // uint8_t: 0 = HTTP/1.0, 1 = HTTP/1.1
request->method();        // enum:    HTTP_GET, HTTP_POST, HTTP_DELETE, HTTP_PUT, HTTP_PATCH, HTTP_HEAD, HTTP_OPTIONS
request->url();           // String:  URL of the request (not including host, port or GET parameters)
request->host();          // String:  The requested host (can be used for virtual hosting)
request->contentType();   // String:  ContentType of the request (not available in Handler::canHandle)
request->contentLength(); // size_t:  ContentLength of the request (not available in Handler::canHandle)
request->multipart();     // bool:    True if the request has content type "multipart"

//List all collected headers
int headers = request->headers();
int i;

for (i=0;i<headers;i++)
{
  AsyncWebHeader* h = request->getHeader(i);
  Serial.printf("HEADER[%s]: %s\n", h->name().c_str(), h->value().c_str());
}

//get specific header by name
if (request->hasHeader("MyHeader"))
{
  AsyncWebHeader* h = request->getHeader("MyHeader");
  Serial.printf("MyHeader: %s\n", h->value().c_str());
}

//List all collected headers (Compatibility)
int headers = request->headers();
int i;

for (i=0;i<headers;i++)
{
  Serial.printf("HEADER[%s]: %s\n", request->headerName(i).c_str(), request->header(i).c_str());
}

//get specific header by name (Compatibility)
if (request->hasHeader("MyHeader"))
{
  Serial.printf("MyHeader: %s\n", request->header("MyHeader").c_str());
}

//List all parameters
int params = request->params();

for (int i=0;i<params;i++)
{
  AsyncWebParameter* p = request->getParam(i);
  
  if (p->isFile())
  { 
    //p->isPost() is also true
    Serial.printf("FILE[%s]: %s, size: %u\n", p->name().c_str(), p->value().c_str(), p->size());
  } 
  else if (p->isPost())
  {
    Serial.printf("POST[%s]: %s\n", p->name().c_str(), p->value().c_str());
  } 
  else 
  {
    Serial.printf("GET[%s]: %s\n", p->name().c_str(), p->value().c_str());
  }
}

//Check if GET parameter exists
if (request->hasParam("download"))
  AsyncWebParameter* p = request->getParam("download");

//Check if POST (but not File) parameter exists
if (request->hasParam("download", true))
  AsyncWebParameter* p = request->getParam("download", true);

//Check if FILE was uploaded
if (request->hasParam("download", true, true))
  AsyncWebParameter* p = request->getParam("download", true, true);

//List all parameters (Compatibility)
int args = request->args();

for (int i=0;i<args;i++)
{
  Serial.printf("ARG[%s]: %s\n", request->argName(i).c_str(), request->arg(i).c_str());
}

//Check if parameter exists (Compatibility)
if (request->hasArg("download"))
  String arg = request->arg("download");

#include "AsyncJson.h"
#include "ArduinoJson.h"

AsyncCallbackJsonWebHandler* handler = new AsyncCallbackJsonWebHandler("/rest/endpoint", [](AsyncWebServerRequest *request, JsonVariant &json) 
{
  JsonObject& jsonObj = json.as<JsonObject>();
  // ...
});

server.addHandler(handler);

//to local url
request->redirect("/login");

//to external url
request->redirect("https://esp8266.com");

request->send(404); //Sends 404 File Not Found

AsyncWebServerResponse *response = request->beginResponse(404); //Sends 404 File Not Found
response->addHeader("Server","AsyncWebServer_WT32_ETH01");
request->send(response);

request->send(200, "text/plain", "Hello World!");

AsyncWebServerResponse *response = request->beginResponse(200, "text/plain", "Hello World!");
response->addHeader("Server","AsyncWebServer");
request->send(response);

//read 12 bytes from Serial and send them as Content Type text/plain
request->send(Serial, "text/plain", 12);

//read 12 bytes from Serial and send them as Content Type text/plain
AsyncWebServerResponse *response = request->beginResponse(Serial, "text/plain", 12);
response->addHeader("Server","AsyncWebServer_WT32_ETH01");
request->send(response);

String processor(const String& var)
{
  if (var == "HELLO_FROM_TEMPLATE")
    return F("Hello world!");
    
  return String();
}

// ...

//read 12 bytes from Serial and send them as Content Type text/plain
request->send(Serial, "text/plain", 12, processor);

String processor(const String& var)
{
  if (var == "HELLO_FROM_TEMPLATE")
    return F("Hello world!");
  return String();
}

// ...

//read 12 bytes from Serial and send them as Content Type text/plain
AsyncWebServerResponse *response = request->beginResponse(Serial, "text/plain", 12, processor);
response->addHeader("Server","AsyncWebServer_WT32_ETH01");
request->send(response);

//send 128 bytes as plain text
request->send("text/plain", 128, [](uint8_t *buffer, size_t maxLen, size_t index) -> size_t 
{
  //Write up to "maxLen" bytes into "buffer" and return the amount written.
  //index equals the amount of bytes that have been already sent
  //You will not be asked for more bytes once the content length has been reached.
  //Keep in mind that you can not delay or yield waiting for more data!
  //Send what you currently have and you will be asked for more again
  return mySource.read(buffer, maxLen);
});

//send 128 bytes as plain text
AsyncWebServerResponse *response = request->beginResponse("text/plain", 128, [](uint8_t *buffer, size_t maxLen, size_t index) -> size_t 
{
  //Write up to "maxLen" bytes into "buffer" and return the amount written.
  //index equals the amount of bytes that have been already sent
  //You will not be asked for more bytes once the content length has been reached.
  //Keep in mind that you can not delay or yield waiting for more data!
  //Send what you currently have and you will be asked for more again
  return mySource.read(buffer, maxLen);
});

response->addHeader("Server","AsyncWebServer_WT32_ETH01");
request->send(response);

String processor(const String& var)
{
  if (var == "HELLO_FROM_TEMPLATE")
    return F("Hello world!");
    
  return String();
}

// ...

//send 128 bytes as plain text
request->send("text/plain", 128, [](uint8_t *buffer, size_t maxLen, size_t index) -> size_t 
{
  //Write up to "maxLen" bytes into "buffer" and return the amount written.
  //index equals the amount of bytes that have been already sent
  //You will not be asked for more bytes once the content length has been reached.
  //Keep in mind that you can not delay or yield waiting for more data!
  //Send what you currently have and you will be asked for more again
  return mySource.read(buffer, maxLen);
}, processor);

String processor(const String& var)
{
  if (var == "HELLO_FROM_TEMPLATE")
    return F("Hello world!");
  return String();
}

// ...

//send 128 bytes as plain text
AsyncWebServerResponse *response = request->beginResponse("text/plain", 128, [](uint8_t *buffer, size_t maxLen, size_t index) -> size_t 
{
  //Write up to "maxLen" bytes into "buffer" and return the amount written.
  //index equals the amount of bytes that have been already sent
  //You will not be asked for more bytes once the content length has been reached.
  //Keep in mind that you can not delay or yield waiting for more data!
  //Send what you currently have and you will be asked for more again
  return mySource.read(buffer, maxLen);
}, processor);

response->addHeader("Server","AsyncWebServer_WT32_ETH01");
request->send(response);

AsyncWebServerResponse *response = request->beginChunkedResponse("text/plain", [](uint8_t *buffer, size_t maxLen, size_t index) -> size_t 
{
  //Write up to "maxLen" bytes into "buffer" and return the amount written.
  //index equals the amount of bytes that have been already sent
  //You will be asked for more data until 0 is returned
  //Keep in mind that you can not delay or yield waiting for more data!
  return mySource.read(buffer, maxLen);
});

response->addHeader("Server","AsyncWebServer_WT32_ETH01");
request->send(response);

String processor(const String& var)
{
  if (var == "HELLO_FROM_TEMPLATE")
    return F("Hello world!");
    
  return String();
}

// ...

AsyncWebServerResponse *response = request->beginChunkedResponse("text/plain", [](uint8_t *buffer, size_t maxLen, size_t index) -> size_t 
{
  //Write up to "maxLen" bytes into "buffer" and return the amount written.
  //index equals the amount of bytes that have been already sent
  //You will be asked for more data until 0 is returned
  //Keep in mind that you can not delay or yield waiting for more data!
  return mySource.read(buffer, maxLen);
}, processor);

response->addHeader("Server","AsyncWebServer_WT32_ETH01");
request->send(response);

AsyncResponseStream *response = request->beginResponseStream("text/html");
response->addHeader("Server","AsyncWebServer_WT32_ETH01");
response->printf("<!DOCTYPE html><html><head><title>Webpage at %s</title></head><body>", request->url().c_str());

response->print("<h2>Hello ");
response->print(request->client()->remoteIP());
response->print("</h2>");

response->print("<h3>General</h3>");
response->print("<ul>");
response->printf("<li>Version: HTTP/1.%u</li>", request->version());
response->printf("<li>Method: %s</li>", request->methodToString());
response->printf("<li>URL: %s</li>", request->url().c_str());
response->printf("<li>Host: %s</li>", request->host().c_str());
response->printf("<li>ContentType: %s</li>", request->contentType().c_str());
response->printf("<li>ContentLength: %u</li>", request->contentLength());
response->printf("<li>Multipart: %s</li>", request->multipart()?"true":"false");
response->print("</ul>");

response->print("<h3>Headers</h3>");
response->print("<ul>");
int headers = request->headers();

for (int i=0;i<headers;i++)
{
  AsyncWebHeader* h = request->getHeader(i);
  response->printf("<li>%s: %s</li>", h->name().c_str(), h->value().c_str());
}

response->print("</ul>");

response->print("<h3>Parameters</h3>");
response->print("<ul>");

int params = request->params();

for (int i=0;i<params;i++)
{
  AsyncWebParameter* p = request->getParam(i);
  
  if (p->isFile())
  {
    response->printf("<li>FILE[%s]: %s, size: %u</li>", p->name().c_str(), p->value().c_str(), p->size());
  } 
  else if (p->isPost())
  {
    response->printf("<li>POST[%s]: %s</li>", p->name().c_str(), p->value().c_str());
  } 
  else 
  {
    response->printf("<li>GET[%s]: %s</li>", p->name().c_str(), p->value().c_str());
  }
}

response->print("</ul>");

response->print("</body></html>");
//send the response last
request->send(response);

#include "AsyncJson.h"
#include "ArduinoJson.h"


AsyncResponseStream *response = request->beginResponseStream("application/json");
DynamicJsonBuffer jsonBuffer;
JsonObject &root = jsonBuffer.createObject();
root["heap"] = ESP.getFreeHeap();
root["ssid"] = WiFi.SSID();
root.printTo(*response);

request->send(response);

#include "AsyncJson.h"
#include "ArduinoJson.h"

AsyncJsonResponse * response = new AsyncJsonResponse();
response->addHeader("Server","AsyncWebServer");
JsonObject& root = response->getRoot();
root["IP"] = Ethernet.localIP();
response->setLength();

request->send(response);

class OneParamRewrite : public AsyncWebRewrite
{
  protected:
    String _urlPrefix;
    int _paramIndex;
    String _paramsBackup;

  public:
  OneParamRewrite(const char* from, const char* to)
    : AsyncWebRewrite(from, to) 
    {

      _paramIndex = _from.indexOf('{');

      if ( _paramIndex >=0 && _from.endsWith("}")) 
      {
        _urlPrefix = _from.substring(0, _paramIndex);
        int index = _params.indexOf('{');
        
        if (index >= 0) 
        {
          _params = _params.substring(0, index);
        }
      } 
      else 
      {
        _urlPrefix = _from;
      }
      
      _paramsBackup = _params;
  }

  bool match(AsyncWebServerRequest *request) override 
  {
    if (request->url().startsWith(_urlPrefix)) 
    {
      if (_paramIndex >= 0) 
      {
        _params = _paramsBackup + request->url().substring(_paramIndex);
      } 
      else 
      {
        _params = _paramsBackup;
      }
      
      return true;

    } 
    else 
    {
      return false;
    }
  }
};

  server.addRewrite( new OneParamRewrite("/radio/{frequence}", "/radio?f={frequence}") );

//This is used as fallback for chunked responses to HTTP/1.0 Clients
request->send("text/plain", 0, [](uint8_t *buffer, size_t maxLen, size_t index) -> size_t 
{
  //Write up to "maxLen" bytes into "buffer" and return the amount written.
  //You will be asked for more data until 0 is returned
  //Keep in mind that you can not delay or yield waiting for more data!
  return mySource.read(buffer, maxLen);
});

void onEvent(AsyncWebSocket * server, AsyncWebSocketClient * client, AwsEventType type, void * arg, uint8_t *data, size_t len)
{
  if (type == WS_EVT_CONNECT)
  {
    //client connected
    Serial.printf("ws[%s][%u] connect\n", server->url(), client->id());
    client->printf("Hello Client %u :)", client->id());
    client->ping();
  } 
  else if (type == WS_EVT_DISCONNECT)
  {
    //client disconnected
    Serial.printf("ws[%s][%u] disconnect: %u\n", server->url(), client->id());
  } 
  else if (type == WS_EVT_ERROR)
  {
    //error was received from the other end
    Serial.printf("ws[%s][%u] error(%u): %s\n", server->url(), client->id(), *((uint16_t*)arg), (char*)data);
  } 
  else if (type == WS_EVT_PONG)
  {
    //pong message was received (in response to a ping request maybe)
    Serial.printf("ws[%s][%u] pong[%u]: %s\n", server->url(), client->id(), len, (len)?(char*)data:"");
  } 
  else if (type == WS_EVT_DATA)
  {
    //data packet
    AwsFrameInfo * info = (AwsFrameInfo*)arg;
    
    if (info->final && info->index == 0 && info->len == len)
    {
      //the whole message is in a single frame and we got all of it's data
      Serial.printf("ws[%s][%u] %s-message[%llu]: ", server->url(), client->id(), (info->opcode == WS_TEXT)?"text":"binary", info->len);
      
      if (info->opcode == WS_TEXT)
      {
        data[len] = 0;
        Serial.printf("%s\n", (char*)data);
      } 
      else 
      {
        for (size_t i=0; i < info->len; i++)
        {
          Serial.printf("%02x ", data[i]);
        }
        
        Serial.printf("\n");
      }
      
      if (info->opcode == WS_TEXT)
        client->text("I got your text message");
      else
        client->binary("I got your binary message");
    } 
    else 
    {
      //message is comprised of multiple frames or the frame is split into multiple packets
      if (info->index == 0)
      {
        if (info->num == 0)
          Serial.printf("ws[%s][%u] %s-message start\n", server->url(), client->id(), (info->message_opcode == WS_TEXT)?"text":"binary");
          
        Serial.printf("ws[%s][%u] frame[%u] start[%llu]\n", server->url(), client->id(), info->num, info->len);
      }

      Serial.printf("ws[%s][%u] frame[%u] %s[%llu - %llu]: ", server->url(), client->id(), info->num, (info->message_opcode == WS_TEXT)?"text":"binary", info->index, info->index + len);
      
      if (info->message_opcode == WS_TEXT)
      {
        data[len] = 0;
        Serial.printf("%s\n", (char*)data);
      } 
      else 
      {
        for (size_t i=0; i < len; i++){
          Serial.printf("%02x ", data[i]);
        }
        Serial.printf("\n");
      }

      if ((info->index + len) == info->len)
      {
        Serial.printf("ws[%s][%u] frame[%u] end[%llu]\n", server->url(), client->id(), info->num, info->len);
        
        if (info->final)
        {
          Serial.printf("ws[%s][%u] %s-message end\n", server->url(), client->id(), (info->message_opcode == WS_TEXT)?"text":"binary");
          
          if (info->message_opcode == WS_TEXT)
            client->text("I got your text message");
          else
            client->binary("I got your binary message");
        }
      }
    }
  }
}

//Server methods
AsyncWebSocket ws("/ws");
//printf to a client
ws.printf((uint32_t)client_id, arguments...);
//printf to all clients
ws.printfAll(arguments...);
//send text to a client
ws.text((uint32_t)client_id, (char*)text);
ws.text((uint32_t)client_id, (uint8_t*)text, (size_t)len);
//send text to all clients
ws.textAll((char*)text);
ws.textAll((uint8_t*)text, (size_t)len);
//send binary to a client
ws.binary((uint32_t)client_id, (char*)binary);
ws.binary((uint32_t)client_id, (uint8_t*)binary, (size_t)len);
ws.binary((uint32_t)client_id, flash_binary, 4);
//send binary to all clients
ws.binaryAll((char*)binary);
ws.binaryAll((uint8_t*)binary, (size_t)len);
//HTTP Authenticate before switch to Websocket protocol
ws.setAuthentication("user", "pass");

//client methods
AsyncWebSocketClient * client;
//printf
client->printf(arguments...);
//send text
client->text((char*)text);
client->text((uint8_t*)text, (size_t)len);
//send binary
client->binary((char*)binary);
client->binary((uint8_t*)binary, (size_t)len);

void sendDataWs(AsyncWebSocketClient * client)
{
    DynamicJsonBuffer jsonBuffer;
    JsonObject& root = jsonBuffer.createObject();
    root["a"] = "abc";
    root["b"] = "abcd";
    root["c"] = "abcde";
    root["d"] = "abcdef";
    root["e"] = "abcdefg";
    size_t len = root.measureLength();
    AsyncWebSocketMessageBuffer * buffer = ws.makeBuffer(len); //  creates a buffer (len + 1) for you.
    
    if (buffer) 
    {
        root.printTo((char *)buffer->get(), len + 1);
        
        if (client) 
        {
            client->text(buffer);
        } 
        else 
        {
            ws.textAll(buffer);
        }
    }
}

void loop()
{
  ws.cleanupClients();
}

AsyncWebServer server(80);
AsyncEventSource events("/events");

void setup()
{
  // setup ......
  events.onConnect([](AsyncEventSourceClient *client)
  {
    if (client->lastId())
    {
      Serial.printf("Client reconnected! Last message ID that it got is: %u\n", client->lastId());
    }
    
    //send event with message "hello!", id current millis
    // and set reconnect delay to 1 second
    client->send("hello!",NULL,millis(),1000);
  });
  
  //HTTP Basic authentication
  events.setAuthentication("user", "pass");
  server.addHandler(&events);
  // setup ......
}

void loop()
{
  if (eventTriggered)
  { 
    // your logic here
    //send event "myevent"
    events.send("my event content","myevent",millis());
  }
}

// save callback for particular URL path
auto handler = server.on("/some/path", [](AsyncWebServerRequest *request)
{
  //do something useful
});

// when you don't need handler anymore remove it
server.removeHandler(&handler);

// same with rewrites
server.removeRewrite(&someRewrite);

server.onNotFound([](AsyncWebServerRequest *request)
{
  request->send(404);
});

// remove server.onNotFound handler
server.onNotFound(NULL);

// remove all rewrites, handlers and onNotFound/onFileUpload/onRequestBody callbacks
server.reset();

#if !( defined(ESP32) )
  #error This code is designed for WT32_ETH01 to run on ESP32 platform! Please check your Tools->Board setting.
#endif

#include <Arduino.h>

#define _ASYNC_WEBSERVER_LOGLEVEL_       4

// Select the IP address according to your local network
IPAddress myIP(192, 168, 2, 232);
IPAddress myGW(192, 168, 2, 1);
IPAddress mySN(255, 255, 255, 0);

// Google DNS Server IP
IPAddress myDNS(8, 8, 8, 8);

#include <AsyncTCP.h>

#include <AsyncWebServer_WT32_ETH01.h>

AsyncWebServer    server(80);

void handleRoot(AsyncWebServerRequest *request)
{
  request->send(200, "text/plain", String("Hello from Async_HelloServer on ") + BOARD_NAME );
}

void handleNotFound(AsyncWebServerRequest *request)
{
  String message = "File Not Found\n\n";

  message += "URI: ";
  //message += server.uri();
  message += request->url();
  message += "\nMethod: ";
  message += (request->method() == HTTP_GET) ? "GET" : "POST";
  message += "\nArguments: ";
  message += request->args();
  message += "\n";

  for (uint8_t i = 0; i < request->args(); i++)
  {
    message += " " + request->argName(i) + ": " + request->arg(i) + "\n";
  }

  request->send(404, "text/plain", message);
}

void setup()
{
  Serial.begin(115200);
  while (!Serial && millis() < 5000);

  delay(200);

  Serial.print(F("\nStart Async_HelloServer on ")); Serial.print(BOARD_NAME);
  Serial.print(F(" with ")); Serial.println(SHIELD_TYPE);
  Serial.println(ASYNC_WEBSERVER_WT32_ETH01_VERSION);

  //bool begin(uint8_t phy_addr=ETH_PHY_ADDR, int power=ETH_PHY_POWER, int mdc=ETH_PHY_MDC, int mdio=ETH_PHY_MDIO, 
  //           eth_phy_type_t type=ETH_PHY_TYPE, eth_clock_mode_t clk_mode=ETH_CLK_MODE);
  //ETH.begin(ETH_PHY_ADDR, ETH_PHY_POWER, ETH_PHY_MDC, ETH_PHY_MDIO, ETH_PHY_TYPE, ETH_CLK_MODE);
  ETH.begin(ETH_PHY_ADDR, ETH_PHY_POWER);

  // Static IP, leave without this line to get IP via DHCP
  //bool config(IPAddress local_ip, IPAddress gateway, IPAddress subnet, IPAddress dns1 = 0, IPAddress dns2 = 0);
  ETH.config(myIP, myGW, mySN, myDNS);

  WT32_ETH01_onEvent();

  WT32_ETH01_waitForConnect();
  
  server.on("/", HTTP_GET, [](AsyncWebServerRequest * request)
  {
    handleRoot(request);
  });

  server.on("/inline", [](AsyncWebServerRequest * request)
  {
    request->send(200, "text/plain", "This works as well");
  });

  server.onNotFound(handleNotFound);

  server.begin();

  Serial.print(F("HTTP EthernetWebServer is @ IP : "));
  Serial.println(ETH.localIP());
}

void loop()
{
}

#include <Arduino.h>

#include <AsyncWebServer_WT32_ETH01.h>

...

void handleRequest(AsyncWebServerRequest *request){}

class WebClass 
{
public :
  AsyncWebServer classWebServer = AsyncWebServer(81);

  WebClass(){};

  void classRequest (AsyncWebServerRequest *request){}

  void begin()
  {
    // attach global request handler
    classWebServer.on("/example", HTTP_ANY, handleRequest);

    // attach class request handler
    classWebServer.on("/example", HTTP_ANY, std::bind(&WebClass::classRequest, this, std::placeholders::_1));
  }
};

AsyncWebServer globalWebServer(80);
WebClass webClassInstance;

void setup() 
{
  // attach global request handler
  globalWebServer.on("/example", HTTP_ANY, handleRequest);

  // attach class request handler
  globalWebServer.on("/example", HTTP_ANY, std::bind(&WebClass::classRequest, webClassInstance, std::placeholders::_1));
}

void loop() 
{

}

  // Disable client connections if it was activated
  if ( ws.enabled() )
    ws.enable(false);

  // enable client connections if it was disabled
  if ( !ws.enabled() )
    ws.enable(true);

DefaultHeaders::Instance().addHeader("Access-Control-Allow-Origin", "*");
webServer.begin();

webServer.onNotFound([](AsyncWebServerRequest *request) 
{
  if (request->method() == HTTP_OPTIONS) {
    request->send(200);
  } else {
    request->send(404);
  }
});

  server.on("^\\/sensor\\/([0-9]+)$", HTTP_GET, [] (AsyncWebServerRequest *request) 
  {
      String sensorId = request->pathArg(0);
  });

// Use this to output debug msgs to Serial
#define DEBUG_ASYNC_WEBSERVER_PORT       Serial
// Use this to disable all output debug msgs
// Debug Level from 0 to 4
#define _ASYNC_WEBSERVER_LOGLEVEL_       0