Pokus o nejnovejsi upravy kvuli ESP32 - nutno overit na ESP8266!!

src/AsyncEventSource.cpp

@@ -137,16 +137,17 @@ size_t AsyncEventSourceMessage::ack(size_t len, uint32_t time) {
   return 0;
 }
 
+// This could also return void as the return value is not used.
+// Leaving as-is for compatibility...
 size_t AsyncEventSourceMessage::send(AsyncClient *client) {
-  const size_t len = _len - _sent;
+    if (_sent >= _len) {
-  if(client->space() < len){
       return 0;
     }
-  size_t sent = client->add((const char *)_data, len);
+    const size_t len_to_send = _len - _sent;
-  if(client->canSend())
+    auto position = reinterpret_cast<const char*>(_data + _sent);
-    client->send();
+    const size_t sent_now = client->write(position, len_to_send);
-  _sent += sent;
+    _sent += sent_now;
-  return sent;
+    return sent_now;
 }
 
 // Client
@@ -173,7 +174,9 @@ AsyncEventSourceClient::AsyncEventSourceClient(AsyncWebServerRequest *request, A
 }
 
 AsyncEventSourceClient::~AsyncEventSourceClient(){
+  _lockmq.lock();
   _messageQueue.free();
+  _lockmq.unlock();
   close();
 }
 
@@ -184,33 +187,41 @@ void AsyncEventSourceClient::_queueMessage(AsyncEventSourceMessage *dataMessage)
     delete dataMessage;
     return;
   }
+  //length() is not thread-safe, thus acquiring the lock before this call..
+  _lockmq.lock();
   if(_messageQueue.length() >= SSE_MAX_QUEUED_MESSAGES){
       ets_printf(String(F("ERROR: Too many messages queued\n")).c_str());
       delete dataMessage;
   } else {
     _messageQueue.add(dataMessage);
-  }
+    // runqueue trigger when new messages added
-  if(_client->canSend())
+    if(_client->canSend()) {
       _runQueue();
+    }
+  }
+  _lockmq.unlock();
 }
 
 void AsyncEventSourceClient::_onAck(size_t len, uint32_t time){
+  // Same here, acquiring the lock early
+  _lockmq.lock();
   while(len && !_messageQueue.isEmpty()){
     len = _messageQueue.front()->ack(len, time);
     if(_messageQueue.front()->finished())
       _messageQueue.remove(_messageQueue.front());
   }
-
   _runQueue();
+  _lockmq.unlock();
 }
 
 void AsyncEventSourceClient::_onPoll(){
+  _lockmq.lock();
   if(!_messageQueue.isEmpty()){
     _runQueue();
   }
+  _lockmq.unlock();
 }
 
-
 void AsyncEventSourceClient::_onTimeout(uint32_t time __attribute__((unused))){
   _client->close(true);
 }
@@ -225,7 +236,7 @@ void AsyncEventSourceClient::close(){
     _client->close();
 }
 
-void AsyncEventSourceClient::write(const char * message, size_t len){
+void AsyncEventSourceClient::_write(const char * message, size_t len){
   _queueMessage(new AsyncEventSourceMessage(message, len));
 }
 
@@ -234,16 +245,24 @@ void AsyncEventSourceClient::send(const char *message, const char *event, uint32
   _queueMessage(new AsyncEventSourceMessage(ev.c_str(), ev.length()));
 }
 
-void AsyncEventSourceClient::_runQueue(){
+size_t AsyncEventSourceClient::packetsWaiting() const {
-  while(!_messageQueue.isEmpty() && _messageQueue.front()->finished()){
+    size_t len;
-    _messageQueue.remove(_messageQueue.front());
+    _lockmq.lock();
-  }
+    len = _messageQueue.length();
+    _lockmq.unlock();
+    return len;
+}
 
-  for(auto i = _messageQueue.begin(); i != _messageQueue.end(); ++i)
+void AsyncEventSourceClient::_runQueue() {
-  {
+  // Calls to this private method now already protected by _lockmq acquisition
-    if(!(*i)->sent())
+  // so no extra call of _lockmq.lock() here..
+  for (auto i = _messageQueue.begin(); i != _messageQueue.end(); ++i) {
+    // If it crashes here, iterator (i) has been invalidated as _messageQueue
+    // has been changed... (UL 2020-11-15: Not supposed to happen any more ;-) )
+    if (!(*i)->sent()) {
       (*i)->send(_client);
     }
+  }
 }
 
 
@@ -280,17 +299,22 @@ void AsyncEventSource::_addClient(AsyncEventSourceClient * client){
     client->write((const char *)temp, 2053);
     free(temp);
   }*/
-
+  AsyncWebLockGuard l(_client_queue_lock);
   _clients.add(client);
   if(_connectcb)
     _connectcb(client);
 }
 
 void AsyncEventSource::_handleDisconnect(AsyncEventSourceClient * client){
+  AsyncWebLockGuard l(_client_queue_lock);
   _clients.remove(client);
 }
 
 void AsyncEventSource::close(){
+  // While the whole loop is not done, the linked list is locked and so the
+  // iterator should remain valid even when AsyncEventSource::_handleDisconnect()
+  // is called very early
+  AsyncWebLockGuard l(_client_queue_lock);
   for(const auto &c: _clients){
     if(c->connected())
       c->close();
@@ -299,37 +323,39 @@ void AsyncEventSource::close(){
 
 // pmb fix
 size_t AsyncEventSource::avgPacketsWaiting() const {
-  if(_clients.isEmpty())
+  size_t aql = 0;
+  uint32_t nConnectedClients = 0;
+  AsyncWebLockGuard l(_client_queue_lock);
+  if (_clients.isEmpty()) {
     return 0;
-
+  }
-  size_t    aql=0;
-  uint32_t  nConnectedClients=0;
-
   for(const auto &c: _clients){
     if(c->connected()) {
-      aql+=c->packetsWaiting();
+      aql += c->packetsWaiting();
       ++nConnectedClients;
     }
   }
-//  return aql / nConnectedClients;
+  return ((aql) + (nConnectedClients/2)) / (nConnectedClients); // round up
-  return ((aql) + (nConnectedClients/2))/(nConnectedClients); // round up
 }
 
-void AsyncEventSource::send(const char *message, const char *event, uint32_t id, uint32_t reconnect){
+void AsyncEventSource::send(
-
+    const char *message, const char *event, uint32_t id, uint32_t reconnect){
-
   String ev = generateEventMessage(message, event, id, reconnect);
+  AsyncWebLockGuard l(_client_queue_lock);
   for(const auto &c: _clients){
     if(c->connected()) {
-      c->write(ev.c_str(), ev.length());
+      c->_write(ev.c_str(), ev.length());
     }
   }
 }
 
 size_t AsyncEventSource::count() const {
-  return _clients.count_if([](AsyncEventSourceClient *c){
+  size_t n_clients;
+  AsyncWebLockGuard l(_client_queue_lock);
+  n_clients = _clients.count_if([](AsyncEventSourceClient *c){
                                     return c->connected();
                                 });
+  return n_clients;
 }
 
 bool AsyncEventSource::canHandle(AsyncWebServerRequest *request){

src/AsyncEventSource.h

@@ -73,6 +73,8 @@ class AsyncEventSourceClient {
     AsyncEventSource *_server;
     uint32_t _lastId;
     LinkedList<AsyncEventSourceMessage *> _messageQueue;
+    // ArFi 2020-08-27 for protecting/serializing _messageQueue
+    AsyncPlainLock _lockmq;
     void _queueMessage(AsyncEventSourceMessage *dataMessage);
     void _runQueue();
 
@@ -83,12 +85,12 @@ class AsyncEventSourceClient {
 
     AsyncClient* client(){ return _client; }
     void close();
-    void write(const char * message, size_t len);
     void send(const char *message, const char *event=NULL, uint32_t id=0, uint32_t reconnect=0);
     bool connected() const { return (_client != NULL) && _client->connected(); }
     uint32_t lastId() const { return _lastId; }
-    size_t  packetsWaiting() const { return _messageQueue.length(); }
+    size_t  packetsWaiting() const;
 
+    void _write(const char * message, size_t len);
     //system callbacks (do not call)
     void _onAck(size_t len, uint32_t time);
     void _onPoll(); 
@@ -100,6 +102,9 @@ class AsyncEventSource: public AsyncWebHandler {
   private:
     String _url;
     LinkedList<AsyncEventSourceClient *> _clients;
+    // Same as for individual messages, protect mutations of _clients list
+    // since simultaneous access from different tasks is possible
+    AsyncWebLock _client_queue_lock;
     ArEventHandlerFunction _connectcb;
 	ArAuthorizeConnectHandler _authorizeConnectHandler;
   public:
@@ -111,7 +116,7 @@ class AsyncEventSource: public AsyncWebHandler {
     void onConnect(ArEventHandlerFunction cb);
     void authorizeConnect(ArAuthorizeConnectHandler cb);
     void send(const char *message, const char *event=NULL, uint32_t id=0, uint32_t reconnect=0);
-    size_t count() const; //number clinets connected
+    size_t count() const; //number clients connected
     size_t  avgPacketsWaiting() const;
 
     //system callbacks (do not call)

src/AsyncJson.h

@@ -41,7 +41,9 @@
 #if ARDUINOJSON_VERSION_MAJOR == 5
   #define ARDUINOJSON_5_COMPATIBILITY
 #else
+  #ifndef DYNAMIC_JSON_DOCUMENT_SIZE
     #define DYNAMIC_JSON_DOCUMENT_SIZE  1024
+  #endif
 #endif
 
 constexpr const char* JSON_MIMETYPE = "application/json";

src/AsyncWebSocket.h

@@ -24,7 +24,7 @@
 #include <Arduino.h>
 #ifdef ESP32
 #include <AsyncTCP.h>
-#define WS_MAX_QUEUED_MESSAGES 32
+#define WS_MAX_QUEUED_MESSAGES 16
 #else
 #include <ESPAsyncTCP.h>
 #define WS_MAX_QUEUED_MESSAGES 8
@@ -33,6 +33,10 @@
 
 #include "AsyncWebSynchronization.h"
 
+#include <list>
+#include <deque>
+#include <memory>
+
 #ifdef ESP8266
 #include <Hash.h>
 #ifdef CRYPTO_HASH_h // include Hash.h from espressif framework if the first include was from the crypto library
@@ -80,78 +84,25 @@ typedef enum { WS_CONTINUATION, WS_TEXT, WS_BINARY, WS_DISCONNECT = 0x08, WS_PIN
 typedef enum { WS_MSG_SENDING, WS_MSG_SENT, WS_MSG_ERROR } AwsMessageStatus;
 typedef enum { WS_EVT_CONNECT, WS_EVT_DISCONNECT, WS_EVT_PONG, WS_EVT_ERROR, WS_EVT_DATA } AwsEventType;
 
-class AsyncWebSocketMessageBuffer {
+class AsyncWebSocketMessage
-  private:
+{
-    uint8_t * _data;
+private:
-    size_t _len;
+    std::shared_ptr<std::vector<uint8_t>> _WSbuffer;
-    bool _lock;
+    uint8_t _opcode{WS_TEXT};
-    uint32_t _count;
+    bool _mask{false};
+    AwsMessageStatus _status{WS_MSG_ERROR};
+    size_t _sent{};
+    size_t _ack{};
+    size_t _acked{};
 
-  public:
-    AsyncWebSocketMessageBuffer();
-    AsyncWebSocketMessageBuffer(size_t size);
-    AsyncWebSocketMessageBuffer(uint8_t * data, size_t size);
-    AsyncWebSocketMessageBuffer(const AsyncWebSocketMessageBuffer &);
-    AsyncWebSocketMessageBuffer(AsyncWebSocketMessageBuffer &&);
-    ~AsyncWebSocketMessageBuffer();
-    void operator ++(int i) { (void)i; _count++; }
-    void operator --(int i) { (void)i; if (_count > 0) { _count--; } ;  }
-    bool reserve(size_t size);
-    void lock() { _lock = true; }
-    void unlock() { _lock = false; }
-    uint8_t * get() { return _data; }
-    size_t length() { return _len; }
-    uint32_t count() { return _count; }
-    bool canDelete() { return (!_count && !_lock); }
-
-    friend AsyncWebSocket;
-
-};
-
-class AsyncWebSocketMessage {
-  protected:
-    uint8_t _opcode;
-    bool _mask;
-    AwsMessageStatus _status;
-  public:
-    AsyncWebSocketMessage():_opcode(WS_TEXT),_mask(false),_status(WS_MSG_ERROR){}
-    virtual ~AsyncWebSocketMessage(){}
-    virtual void ack(size_t len __attribute__((unused)), uint32_t time __attribute__((unused))){}
-    virtual size_t send(AsyncClient *client __attribute__((unused))){ return 0; }
-    virtual bool finished(){ return _status != WS_MSG_SENDING; }
-    virtual bool betweenFrames() const { return false; }
-};
-
-class AsyncWebSocketBasicMessage: public AsyncWebSocketMessage {
-  private:
-    size_t _len;
-    size_t _sent;
-    size_t _ack;
-    size_t _acked;
-    uint8_t * _data;
 public:
-    AsyncWebSocketBasicMessage(const char * data, size_t len, uint8_t opcode=WS_TEXT, bool mask=false);
+    AsyncWebSocketMessage(std::shared_ptr<std::vector<uint8_t>> buffer, uint8_t opcode=WS_TEXT, bool mask=false);
-    AsyncWebSocketBasicMessage(uint8_t opcode=WS_TEXT, bool mask=false);
-    virtual ~AsyncWebSocketBasicMessage() override;
-    virtual bool betweenFrames() const override { return _acked == _ack; }
-    virtual void ack(size_t len, uint32_t time) override ;
-    virtual size_t send(AsyncClient *client) override ;
-};
 
-class AsyncWebSocketMultiMessage: public AsyncWebSocketMessage {
+    bool finished() const { return _status != WS_MSG_SENDING; }
-  private:
+    bool betweenFrames() const { return _acked == _ack; }
-    uint8_t * _data;
+
-    size_t _len;
+    void ack(size_t len, uint32_t time);
-    size_t _sent;
+    size_t send(AsyncClient *client);
-    size_t _ack;
-    size_t _acked;
-    AsyncWebSocketMessageBuffer * _WSbuffer;
-public:
-    AsyncWebSocketMultiMessage(AsyncWebSocketMessageBuffer * buffer, uint8_t opcode=WS_TEXT, bool mask=false);
-    virtual ~AsyncWebSocketMultiMessage() override;
-    virtual bool betweenFrames() const override { return _acked == _ack; }
-    virtual void ack(size_t len, uint32_t time) override ;
-    virtual size_t send(AsyncClient *client) override ;
 };
 
 class AsyncWebSocketClient {
@@ -161,8 +112,10 @@ class AsyncWebSocketClient {
     uint32_t _clientId;
     AwsClientStatus _status;
 
-    LinkedList<AsyncWebSocketControl *> _controlQueue;
+    AsyncWebLock _lock;
-    LinkedList<AsyncWebSocketMessage *> _messageQueue;
+
+    std::deque<AsyncWebSocketControl> _controlQueue;
+    std::deque<AsyncWebSocketMessage> _messageQueue;
 
     uint8_t _pstate;
     AwsFrameInfo _pinfo;
@@ -170,8 +123,8 @@ class AsyncWebSocketClient {
     uint32_t _lastMessageTime;
     uint32_t _keepAlivePeriod;
 
-    void _queueMessage(AsyncWebSocketMessage *dataMessage);
+    void _queueControl(uint8_t opcode, const uint8_t *data=NULL, size_t len=0, bool mask=false);
-    void _queueControl(AsyncWebSocketControl *controlMessage);
+    void _queueMessage(std::shared_ptr<std::vector<uint8_t>> buffer, uint8_t opcode=WS_TEXT, bool mask=false);
     void _runQueue();
     void _clearQueue();
 
@@ -182,18 +135,22 @@ class AsyncWebSocketClient {
     ~AsyncWebSocketClient();
 
     //client id increments for the given server
-    uint32_t id(){ return _clientId; }
+    uint32_t id() const { return _clientId; }
-    AwsClientStatus status(){ return _status; }
+    AwsClientStatus status() const { return _status; }
-    AsyncClient* client(){ return _client; }
+    AsyncClient* client() { return _client; }
+    const AsyncClient* client() const { return _client; }
     AsyncWebSocket *server(){ return _server; }
+    const AsyncWebSocket *server() const { return _server; }
     AwsFrameInfo const &pinfo() const { return _pinfo; }
 
-    IPAddress remoteIP();
+    IPAddress remoteIP() const;
-    uint16_t  remotePort();
+    uint16_t  remotePort() const;
+
+    bool shouldBeDeleted() const { return !_client; }
 
     //control frames
     void close(uint16_t code=0, const char * message=NULL);
-    void ping(uint8_t *data=NULL, size_t len=0);
+    void ping(const uint8_t *data=NULL, size_t len=0);
 
     //set auto-ping period in seconds. disabled if zero (default)
     void keepAlivePeriod(uint16_t seconds){
@@ -204,31 +161,30 @@ class AsyncWebSocketClient {
     }
 
     //data packets
-    void message(AsyncWebSocketMessage *message){ _queueMessage(message); }
+    void message(std::shared_ptr<std::vector<uint8_t>> buffer, uint8_t opcode=WS_TEXT, bool mask=false) { _queueMessage(buffer, opcode, mask); }
-    bool queueIsFull();
+    bool queueIsFull() const;
-    size_t queueLen() { return _messageQueue.length() + _controlQueue.length(); }
+    size_t queueLen() const;
 
     size_t printf(const char *format, ...)  __attribute__ ((format (printf, 2, 3)));
 #ifndef ESP32
     size_t printf_P(PGM_P formatP, ...)  __attribute__ ((format (printf, 2, 3)));
 #endif
-    void text(const char * message, size_t len);
-    void text(const char * message);
-    void text(uint8_t * message, size_t len);
-    void text(char * message);
-    void text(const String &message);
-    void text(const __FlashStringHelper *data);
-    void text(AsyncWebSocketMessageBuffer *buffer);
 
+    void text(std::shared_ptr<std::vector<uint8_t>> buffer);
+    void text(const uint8_t *message, size_t len);
+    void text(const char *message, size_t len);
+    void text(const char *message);
+    void text(const String &message);
+    void text(const __FlashStringHelper *message);
+
+    void binary(std::shared_ptr<std::vector<uint8_t>> buffer);
+    void binary(const uint8_t *message, size_t len);
     void binary(const char * message, size_t len);
     void binary(const char * message);
-    void binary(uint8_t * message, size_t len);
-    void binary(char * message);
     void binary(const String &message);
-    void binary(const __FlashStringHelper *data, size_t len);
+    void binary(const __FlashStringHelper *message, size_t len);
-    void binary(AsyncWebSocketMessageBuffer *buffer);
 
-    bool canSend() { return _messageQueue.length() < WS_MAX_QUEUED_MESSAGES; }
+    bool canSend() const;
 
     //system callbacks (do not call)
     void _onAck(size_t len, uint32_t time);
@@ -244,11 +200,9 @@ typedef std::function<void(AsyncWebSocket * server, AsyncWebSocketClient * clien
 
 //WebServer Handler implementation that plays the role of a socket server
 class AsyncWebSocket: public AsyncWebHandler {
-  public:
-    typedef LinkedList<AsyncWebSocketClient *> AsyncWebSocketClientLinkedList;
   private:
     String _url;
-    AsyncWebSocketClientLinkedList _clients;
+    std::list<AsyncWebSocketClient> _clients;
     uint32_t _cNextId;
     AwsEventHandler _eventHandler;
 	AwsHandshakeHandler _handshakeHandler;
@@ -272,41 +226,34 @@ class AsyncWebSocket: public AsyncWebHandler {
     void closeAll(uint16_t code=0, const char * message=NULL);
     void cleanupClients(uint16_t maxClients = DEFAULT_MAX_WS_CLIENTS);
 
-    void ping(uint32_t id, uint8_t *data=NULL, size_t len=0);
+    void ping(uint32_t id, const uint8_t *data=NULL, size_t len=0);
-    void pingAll(uint8_t *data=NULL, size_t len=0); //  done
+    void pingAll(const uint8_t *data=NULL, size_t len=0); //  done
 
-    void text(uint32_t id, const char * message, size_t len);
+    void text(uint32_t id, const uint8_t * message, size_t len);
-    void text(uint32_t id, const char * message);
+    void text(uint32_t id, const char *message, size_t len);
-    void text(uint32_t id, uint8_t * message, size_t len);
+    void text(uint32_t id, const char *message);
-    void text(uint32_t id, char * message);
     void text(uint32_t id, const String &message);
     void text(uint32_t id, const __FlashStringHelper *message);
 
+    void textAll(std::shared_ptr<std::vector<uint8_t>> buffer);
+    void textAll(const uint8_t *message, size_t len);
     void textAll(const char * message, size_t len);
     void textAll(const char * message);
-    void textAll(uint8_t * message, size_t len);
-    void textAll(char * message);
     void textAll(const String &message);
     void textAll(const __FlashStringHelper *message); //  need to convert
-    void textAll(AsyncWebSocketMessageBuffer * buffer);
 
-    void binary(uint32_t id, const char * message, size_t len);
+    void binary(uint32_t id, const uint8_t *message, size_t len);
-    void binary(uint32_t id, const char * message);
+    void binary(uint32_t id, const char *message, size_t len);
-    void binary(uint32_t id, uint8_t * message, size_t len);
+    void binary(uint32_t id, const char *message);
-    void binary(uint32_t id, char * message);
     void binary(uint32_t id, const String &message);
     void binary(uint32_t id, const __FlashStringHelper *message, size_t len);
 
-    void binaryAll(const char * message, size_t len);
+    void binaryAll(std::shared_ptr<std::vector<uint8_t>> buffer);
-    void binaryAll(const char * message);
+    void binaryAll(const uint8_t *message, size_t len);
-    void binaryAll(uint8_t * message, size_t len);
+    void binaryAll(const char *message, size_t len);
-    void binaryAll(char * message);
+    void binaryAll(const char *message);
     void binaryAll(const String &message);
     void binaryAll(const __FlashStringHelper *message, size_t len);
-    void binaryAll(AsyncWebSocketMessageBuffer * buffer);
-
-    void message(uint32_t id, AsyncWebSocketMessage *message);
-    void messageAll(AsyncWebSocketMultiMessage *message);
 
     size_t printf(uint32_t id, const char *format, ...)  __attribute__ ((format (printf, 3, 4)));
     size_t printfAll(const char *format, ...)  __attribute__ ((format (printf, 2, 3)));
@@ -327,20 +274,12 @@ class AsyncWebSocket: public AsyncWebHandler {
 	
     //system callbacks (do not call)
     uint32_t _getNextId(){ return _cNextId++; }
-    void _addClient(AsyncWebSocketClient * client);
+    AsyncWebSocketClient *_newClient(AsyncWebServerRequest *request);
-    void _handleDisconnect(AsyncWebSocketClient * client);
     void _handleEvent(AsyncWebSocketClient * client, AwsEventType type, void * arg, uint8_t *data, size_t len);
     virtual bool canHandle(AsyncWebServerRequest *request) override final;
     virtual void handleRequest(AsyncWebServerRequest *request) override final;
 
-
+    const std::list<AsyncWebSocketClient> &getClients() const { return _clients; }
-    //  messagebuffer functions/objects.
-    AsyncWebSocketMessageBuffer * makeBuffer(size_t size = 0);
-    AsyncWebSocketMessageBuffer * makeBuffer(uint8_t * data, size_t size);
-    LinkedList<AsyncWebSocketMessageBuffer *> _buffers;
-    void _cleanBuffers();
-
-    AsyncWebSocketClientLinkedList getClients() const;
 };
 
 //WebServer response to authenticate the socket and detach the tcp client from the web server request

src/AsyncWebSynchronization.h

@@ -7,16 +7,52 @@
 
 #ifdef ESP32
 
+// This is the ESP32 version of the Sync Lock, using the FreeRTOS Semaphore
+// Modified 'AsyncWebLock' to just only use mutex since pxCurrentTCB is not
+// always available. According to example by Arjan Filius, changed name,
+// added unimplemented version for ESP8266
+class AsyncPlainLock
+{
+private:
+  SemaphoreHandle_t _lock;
+
+public:
+  AsyncPlainLock() {
+    _lock = xSemaphoreCreateBinary();
+    // In this fails, the system is likely that much out of memory that
+    // we should abort anyways. If assertions are disabled, nothing is lost..
+    assert(_lock);
+    xSemaphoreGive(_lock);
+  }
+
+  ~AsyncPlainLock() {
+    vSemaphoreDelete(_lock);
+  }
+
+  bool lock() const {
+      xSemaphoreTake(_lock, portMAX_DELAY);
+      return true;
+  }
+
+  void unlock() const {
+    xSemaphoreGive(_lock);
+  }
+};
+
 // This is the ESP32 version of the Sync Lock, using the FreeRTOS Semaphore
 class AsyncWebLock
 {
 private:
     SemaphoreHandle_t _lock;
-  mutable void *_lockedBy;
+    mutable TaskHandle_t _lockedBy{};
 
 public:
-  AsyncWebLock() {
+    AsyncWebLock()
+    {
         _lock = xSemaphoreCreateBinary();
+        // In this fails, the system is likely that much out of memory that
+        // we should abort anyways. If assertions are disabled, nothing is lost..
+        assert(_lock);
         _lockedBy = NULL;
         xSemaphoreGive(_lock);
     }
@@ -26,10 +62,10 @@ public:
     }
 
     bool lock() const {
-    extern void *pxCurrentTCB;
+        const auto currentTask = xTaskGetCurrentTaskHandle();
-    if (_lockedBy != pxCurrentTCB) {
+        if (_lockedBy != currentTask) {
             xSemaphoreTake(_lock, portMAX_DELAY);
-      _lockedBy = pxCurrentTCB;
+            _lockedBy = currentTask;
             return true;
         }
         return false;
@@ -61,6 +97,10 @@ public:
   void unlock() const {
   }
 };
+
+// Same for AsyncPlainLock, for ESP8266 this is just the unimplemented version above. 
+using AsyncPlainLock = AsyncWebLock;
+
 #endif
 
 class AsyncWebLockGuard
@@ -82,6 +122,13 @@ public:
       _lock->unlock();
     }
   }
+
+  void unlock() {
+    if (_lock) {
+      _lock->unlock();
+      _lock = NULL;
+    }
+  }
 };
 
 #endif // ASYNCWEBSYNCHRONIZATION_H_

src/ESPAsyncWebServer.h

@@ -24,6 +24,8 @@
 #include "Arduino.h"
 
 #include <functional>
+#include <list>
+#include <vector>
 #include "FS.h"
 
 #include "StringArray.h"
@@ -59,22 +61,14 @@ class AsyncResponseStream;
 
 #ifndef WEBSERVER_H
 typedef enum {
-  HTTP_GET       = 0b0000000000000001,
+  HTTP_GET     = 0b00000001,
-  HTTP_POST      = 0b0000000000000010,
+  HTTP_POST    = 0b00000010,
-  HTTP_DELETE    = 0b0000000000000100,
+  HTTP_DELETE  = 0b00000100,
-  HTTP_PUT       = 0b0000000000001000,
+  HTTP_PUT     = 0b00001000,
-  HTTP_PATCH     = 0b0000000000010000,
+  HTTP_PATCH   = 0b00010000,
-  HTTP_HEAD      = 0b0000000000100000,
+  HTTP_HEAD    = 0b00100000,
-  HTTP_OPTIONS   = 0b0000000001000000,
+  HTTP_OPTIONS = 0b01000000,
-  HTTP_PROPFIND  = 0b0000000010000000,
+  HTTP_ANY     = 0b01111111,
-  HTTP_LOCK      = 0b0000000100000000,
-  HTTP_UNLOCK    = 0b0000001000000000,
-  HTTP_PROPPATCH = 0b0000010000000000,
-  HTTP_MKCOL     = 0b0000100000000000,
-  HTTP_MOVE      = 0b0001000000000000,
-  HTTP_COPY      = 0b0010000000000000,
-  HTTP_RESERVED  = 0b0100000000000000,
-  HTTP_ANY       = 0b0111111111111111,
 } WebRequestMethod;
 #endif
 
@@ -94,7 +88,7 @@ namespace fs {
 //if this value is returned when asked for data, packet will not be sent and you will be asked for data again
 #define RESPONSE_TRY_AGAIN 0xFFFFFFFF
 
-typedef uint16_t WebRequestMethodComposite;
+typedef uint8_t WebRequestMethodComposite;
 typedef std::function<void(void)> ArDisconnectHandler;
 
 /*
@@ -129,6 +123,9 @@ class AsyncWebHeader {
     String _value;
 
   public:
+    AsyncWebHeader() = default;
+    AsyncWebHeader(const AsyncWebHeader &) = default;
+
     AsyncWebHeader(const String& name, const String& value): _name(name), _value(value){}
     AsyncWebHeader(const String& data): _name(), _value(){
       if(!data) return;
@@ -137,10 +134,12 @@ class AsyncWebHeader {
       _name = data.substring(0, index);
       _value = data.substring(index + 2);
     }
-    ~AsyncWebHeader(){}
+
+    AsyncWebHeader &operator=(const AsyncWebHeader &) = default;
+
     const String& name() const { return _name; }
     const String& value() const { return _value; }
-    String toString() const { return String(_name + F(": ") + _value + F("\r\n")); }
+    String toString() const { return _name + F(": ") + _value + F("\r\n"); }
 };
 
 /*
@@ -162,7 +161,7 @@ class AsyncWebServerRequest {
     AsyncWebServer* _server;
     AsyncWebHandler* _handler;
     AsyncWebServerResponse* _response;
-    StringArray _interestingHeaders;
+    std::vector<String> _interestingHeaders;
     ArDisconnectHandler _onDisconnectfn;
 
     String _temp;
@@ -184,9 +183,9 @@ class AsyncWebServerRequest {
     size_t _contentLength;
     size_t _parsedLength;
 
-    LinkedList<AsyncWebHeader *> _headers;
+    std::list<AsyncWebHeader> _headers;
     LinkedList<AsyncWebParameter *> _params;
-    LinkedList<String *> _pathParams;
+    std::vector<String> _pathParams;
 
     uint8_t _multiParseState;
     uint8_t _boundaryPosition;
@@ -278,9 +277,12 @@ class AsyncWebServerRequest {
     bool hasHeader(const String& name) const;   // check if header exists
     bool hasHeader(const __FlashStringHelper * data) const;   // check if header exists
 
-    AsyncWebHeader* getHeader(const String& name) const;
+    AsyncWebHeader* getHeader(const String& name);
-    AsyncWebHeader* getHeader(const __FlashStringHelper * data) const;
+    const AsyncWebHeader* getHeader(const String& name) const;
-    AsyncWebHeader* getHeader(size_t num) const;
+    AsyncWebHeader* getHeader(const __FlashStringHelper * data);
+    const AsyncWebHeader* getHeader(const __FlashStringHelper * data) const;
+    AsyncWebHeader* getHeader(size_t num);
+    const AsyncWebHeader* getHeader(size_t num) const;
 
     size_t params() const;                      // get arguments count
     bool hasParam(const String& name, bool post=false, bool file=false) const;
@@ -379,7 +381,7 @@ typedef enum {
 class AsyncWebServerResponse {
   protected:
     int _code;
-    LinkedList<AsyncWebHeader *> _headers;
+    std::list<AsyncWebHeader> _headers;
     String _contentType;
     size_t _contentLength;
     bool _sendContentLength;
@@ -462,17 +464,16 @@ class AsyncWebServer {
 };
 
 class DefaultHeaders {
-  using headers_t = LinkedList<AsyncWebHeader *>;
+  using headers_t = std::list<AsyncWebHeader>;
   headers_t _headers;
 
-  DefaultHeaders()
-  :_headers(headers_t([](AsyncWebHeader *h){ delete h; }))
-  {}
 public:
-  using ConstIterator = headers_t::ConstIterator;
+  DefaultHeaders() = default;
+
+  using ConstIterator = headers_t::const_iterator;
 
   void addHeader(const String& name, const String& value){
-    _headers.add(new AsyncWebHeader(name, value));
+    _headers.emplace_back(name, value);
   }
 
   ConstIterator begin() const { return _headers.begin(); }
@@ -480,6 +481,7 @@ public:
 
   DefaultHeaders(DefaultHeaders const &) = delete;
   DefaultHeaders &operator=(DefaultHeaders const &) = delete;
+
   static DefaultHeaders &Instance() {
     static DefaultHeaders instance;
     return instance;

src/SPIFFSEditor.cpp

@@ -1,8 +1,6 @@
 #include "SPIFFSEditor.h"
 #include <FS.h>
 
-#define EDFS
-
 #ifndef EDFS
  #include "edit.htm.gz.h"
 #endif

src/StringArray.h

@@ -171,23 +171,4 @@ class LinkedList {
     }
 };
 
-
-class StringArray : public LinkedList<String> {
-public:
-  
-  StringArray() : LinkedList(nullptr) {}
-  
-  bool containsIgnoreCase(const String& str){
-    for (const auto& s : *this) {
-      if (str.equalsIgnoreCase(s)) {
-        return true;
-      }
-    }
-    return false;
-  }
-};
-
-
-
-
 #endif /* STRINGARRAY_H_ */

src/WebAuthentication.cpp

@@ -77,9 +77,9 @@ static bool getMD5(uint8_t * data, uint16_t len, char * output){//33 bytes or mo
   memset(_buf, 0x00, 16);
 #ifdef ESP32
   mbedtls_md5_init(&_ctx);
-  mbedtls_md5_starts(&_ctx);
+  mbedtls_md5_starts_ret(&_ctx);
-  mbedtls_md5_update(&_ctx, data, len);
+  mbedtls_md5_update_ret(&_ctx, data, len);
-  mbedtls_md5_finish(&_ctx, _buf);
+  mbedtls_md5_finish_ret(&_ctx, _buf);
 #else
   MD5Init(&_ctx);
   MD5Update(&_ctx, data, len);

src/WebRequest.cpp

@@ -51,9 +51,7 @@ AsyncWebServerRequest::AsyncWebServerRequest(AsyncWebServer* s, AsyncClient* c)
   , _expectingContinue(false)
   , _contentLength(0)
   , _parsedLength(0)
-  , _headers(LinkedList<AsyncWebHeader *>([](AsyncWebHeader *h){ delete h; }))
   , _params(LinkedList<AsyncWebParameter *>([](AsyncWebParameter *p){ delete p; }))
-  , _pathParams(LinkedList<String *>([](String *p){ delete p; }))
   , _multiParseState(0)
   , _boundaryPosition(0)
   , _itemStartIndex(0)
@@ -76,12 +74,12 @@ AsyncWebServerRequest::AsyncWebServerRequest(AsyncWebServer* s, AsyncClient* c)
 }
 
 AsyncWebServerRequest::~AsyncWebServerRequest(){
-  _headers.free();
+  _headers.clear();
 
   _params.free();
-  _pathParams.free();
+  _pathParams.clear();
 
-  _interestingHeaders.free();
+  _interestingHeaders.clear();
 
   if(_response != NULL){
     delete _response;
@@ -182,11 +180,19 @@ void AsyncWebServerRequest::_onData(void *buf, size_t len){
 }
 
 void AsyncWebServerRequest::_removeNotInterestingHeaders(){
-  if (_interestingHeaders.containsIgnoreCase(F("ANY"))) return; // nothing to do
+  if (std::any_of(std::begin(_interestingHeaders), std::end(_interestingHeaders),
-  for(const auto& header: _headers){
+      [](const String &str){ return str.equalsIgnoreCase(F("ANY")); }))
-      if(!_interestingHeaders.containsIgnoreCase(header->name().c_str())){
+      return; // nothing to do
-        _headers.remove(header);
+
-      }
+  for(auto iter = std::begin(_headers); iter != std::end(_headers); )
+  {
+      const auto name = iter->name();
+
+      if (std::none_of(std::begin(_interestingHeaders), std::end(_interestingHeaders),
+                       [&name](const String &str){ return str.equalsIgnoreCase(name); }))
+          iter = _headers.erase(iter);
+      else
+          iter++;
   }
 }
 
@@ -247,7 +253,7 @@ void AsyncWebServerRequest::_addParam(AsyncWebParameter *p){
 }
 
 void AsyncWebServerRequest::_addPathParam(const char *p){
-  _pathParams.add(new String(p));
+  _pathParams.emplace_back(p);
 }
 
 void AsyncWebServerRequest::_addGetParams(const String& params){
@@ -286,24 +292,6 @@ bool AsyncWebServerRequest::_parseReqHead(){
     _method = HTTP_HEAD;
   } else if(m == F("OPTIONS")){
     _method = HTTP_OPTIONS;
-  } else if(m == F("PROPFIND")){
-    _method = HTTP_PROPFIND;
-  } else if(m == F("LOCK")){
-    _method = HTTP_LOCK;
-  } else if(m == F("UNLOCK")){
-    _method = HTTP_UNLOCK;
-  } else if(m == F("PROPPATCH")){
-    _method = HTTP_PROPPATCH;
-  } else if(m == F("MKCOL")){
-    _method = HTTP_MKCOL;
-  } else if(m == F("MOVE")){
-    _method = HTTP_MOVE;
-  } else if(m == F("COPY")){
-    _method = HTTP_COPY;
-  } else if(m == F("RESERVED")){
-    _method = HTTP_RESERVED;
-  } else if(m == F("ANY")){
-    _method = HTTP_ANY;
   }
 
   String g;
@@ -379,7 +367,7 @@ bool AsyncWebServerRequest::_parseReqHeader(){
         }
       }
     }
-    _headers.add(new AsyncWebHeader(name, value));
+    _headers.emplace_back(name, value);
   }
   _temp = String();
   return true;
@@ -620,12 +608,12 @@ void AsyncWebServerRequest::_parseLine(){
 }
 
 size_t AsyncWebServerRequest::headers() const{
-  return _headers.length();
+  return _headers.size();
 }
 
 bool AsyncWebServerRequest::hasHeader(const String& name) const {
   for(const auto& h: _headers){
-    if(h->name().equalsIgnoreCase(name)){
+    if(h.name().equalsIgnoreCase(name)){
       return true;
     }
   }
@@ -636,22 +624,64 @@ bool AsyncWebServerRequest::hasHeader(const __FlashStringHelper * data) const {
   return hasHeader(String(data));
 }
 
-AsyncWebHeader* AsyncWebServerRequest::getHeader(const String& name) const {
+AsyncWebHeader* AsyncWebServerRequest::getHeader(const String& name) {
-  for(const auto& h: _headers){
+  auto iter = std::find_if(std::begin(_headers), std::end(_headers),
-    if(h->name().equalsIgnoreCase(name)){
+                           [&name](const AsyncWebHeader &header){ return header.name().equalsIgnoreCase(name); });
-      return h;
+
-    }
+  if (iter == std::end(_headers))
-  }
         return nullptr;
+
+  return &(*iter);
 }
 
-AsyncWebHeader* AsyncWebServerRequest::getHeader(const __FlashStringHelper * data) const {
+const AsyncWebHeader* AsyncWebServerRequest::getHeader(const String& name) const {
-  return getHeader(String(data));
+  auto iter = std::find_if(std::begin(_headers), std::end(_headers),
+                           [&name](const AsyncWebHeader &header){ return header.name().equalsIgnoreCase(name); });
+
+  if (iter == std::end(_headers))
+        return nullptr;
+
+  return &(*iter);
 }
 
-AsyncWebHeader* AsyncWebServerRequest::getHeader(size_t num) const {
+AsyncWebHeader* AsyncWebServerRequest::getHeader(const __FlashStringHelper * data) {
-  auto header = _headers.nth(num);
+  PGM_P p = reinterpret_cast<PGM_P>(data);
-  return header ? *header : nullptr;
+  size_t n = strlen_P(p);
+  char * name = (char*) malloc(n+1);
+  if (name) {
+    strcpy_P(name, p);
+    AsyncWebHeader* result = getHeader( String(name));
+    free(name);
+    return result;
+  } else {
+    return nullptr;
+  }
+}
+
+const AsyncWebHeader* AsyncWebServerRequest::getHeader(const __FlashStringHelper * data) const {
+  PGM_P p = reinterpret_cast<PGM_P>(data);
+  size_t n = strlen_P(p);
+  char * name = (char*) malloc(n+1);
+  if (name) {
+    strcpy_P(name, p);
+    const AsyncWebHeader* result = getHeader( String(name));
+    free(name);
+    return result;
+  } else {
+    return nullptr;
+  }
+}
+
+AsyncWebHeader* AsyncWebServerRequest::getHeader(size_t num) {
+  if (num >= _headers.size())
+      return nullptr;
+  return &(*std::next(std::begin(_headers), num));
+}
+
+const AsyncWebHeader* AsyncWebServerRequest::getHeader(size_t num) const {
+  if (num >= _headers.size())
+      return nullptr;
+  return &(*std::next(std::begin(_headers), num));
 }
 
 size_t AsyncWebServerRequest::params() const {
@@ -690,8 +720,9 @@ AsyncWebParameter* AsyncWebServerRequest::getParam(size_t num) const {
 }
 
 void AsyncWebServerRequest::addInterestingHeader(const String& name){
-  if(!_interestingHeaders.containsIgnoreCase(name))
+  if(std::none_of(std::begin(_interestingHeaders), std::end(_interestingHeaders),
-    _interestingHeaders.add(name);
+                  [&name](const String &str){ return str.equalsIgnoreCase(name); }))
+    _interestingHeaders.push_back(name);
 }
 
 void AsyncWebServerRequest::send(AsyncWebServerResponse *response){
@@ -883,12 +914,11 @@ const String& AsyncWebServerRequest::argName(size_t i) const {
 }
 
 const String& AsyncWebServerRequest::pathArg(size_t i) const {
-  auto param = _pathParams.nth(i);
+  return i < _pathParams.size() ? _pathParams[i] : emptyString;
-  return param ? **param : emptyString;
 }
 
 const String& AsyncWebServerRequest::header(const char* name) const {
-  AsyncWebHeader* h = getHeader(String(name));
+  const AsyncWebHeader* h = getHeader(String(name));
   return h ? h->value() : emptyString;
 }
 
@@ -898,12 +928,12 @@ const String& AsyncWebServerRequest::header(const __FlashStringHelper * data) co
 
 
 const String& AsyncWebServerRequest::header(size_t i) const {
-  AsyncWebHeader* h = getHeader(i);
+  const AsyncWebHeader* h = getHeader(i);
   return h ?  h->value() : emptyString;
 }
 
 const String& AsyncWebServerRequest::headerName(size_t i) const {
-  AsyncWebHeader* h = getHeader(i);
+  const AsyncWebHeader* h = getHeader(i);
   return h ? h->name() : emptyString;
 }
 
@@ -940,14 +970,6 @@ const __FlashStringHelper *AsyncWebServerRequest::methodToString() const {
   else if(_method & HTTP_PATCH) return F("PATCH");
   else if(_method & HTTP_HEAD) return F("HEAD");
   else if(_method & HTTP_OPTIONS) return F("OPTIONS");
-  else if(_method & HTTP_PROPFIND) return F("PROPFIND");
-  else if(_method & HTTP_LOCK) return F("LOCK");
-  else if(_method & HTTP_UNLOCK) return F("UNLOCK");
-  else if(_method & HTTP_PROPPATCH) return F("PROPPATCH");
-  else if(_method & HTTP_MKCOL) return F("MKCOL");
-  else if(_method & HTTP_MOVE) return F("MOVE");
-  else if(_method & HTTP_COPY) return F("COPY");
-  else if(_method & HTTP_RESERVED) return F("RESERVED");
   return F("UNKNOWN");
 }
 

src/WebResponseImpl.h

@@ -27,6 +27,8 @@
 #undef max
 #endif
 #include <vector>
+#include <memory>
+
 // It is possible to restore these defines, but one can use _min and _max instead. Or std::min, std::max.
 
 class AsyncBasicResponse: public AsyncWebServerResponse {
@@ -122,7 +124,7 @@ class cbuf;
 
 class AsyncResponseStream: public AsyncAbstractResponse, public Print {
   private:
-    cbuf *_content;
+    std::unique_ptr<cbuf> _content;
   public:
     AsyncResponseStream(const String& contentType, size_t bufferSize);
     ~AsyncResponseStream();

src/WebResponses.cpp

@@ -88,7 +88,6 @@ const __FlashStringHelper *AsyncWebServerResponse::responseCodeToString(int code
 
 AsyncWebServerResponse::AsyncWebServerResponse()
   : _code(0)
-  , _headers(LinkedList<AsyncWebHeader *>([](AsyncWebHeader *h){ delete h; }))
   , _contentType()
   , _contentLength(0)
   , _sendContentLength(true)
@@ -99,14 +98,12 @@ AsyncWebServerResponse::AsyncWebServerResponse()
   , _writtenLength(0)
   , _state(RESPONSE_SETUP)
 {
-  for(auto header: DefaultHeaders::Instance()) {
+  for(const auto &header: DefaultHeaders::Instance()) {
-    _headers.add(new AsyncWebHeader(header->name(), header->value()));
+    _headers.emplace_back(header);
   }
 }
 
-AsyncWebServerResponse::~AsyncWebServerResponse(){
+AsyncWebServerResponse::~AsyncWebServerResponse() = default;
-  _headers.free();
-}
 
 void AsyncWebServerResponse::setCode(int code){
   if(_state == RESPONSE_SETUP)
@@ -124,7 +121,7 @@ void AsyncWebServerResponse::setContentType(const String& type){
 }
 
 void AsyncWebServerResponse::addHeader(const String& name, const String& value){
-  _headers.add(new AsyncWebHeader(name, value));
+  _headers.emplace_back(name, value);
 }
 
 String AsyncWebServerResponse::_assembleHead(uint8_t version){
@@ -150,10 +147,10 @@ String AsyncWebServerResponse::_assembleHead(uint8_t version){
   }
 
   for(const auto& header: _headers){
-    snprintf_P(buf, bufSize, PSTR("%s: %s\r\n"), header->name().c_str(), header->value().c_str());
+    snprintf_P(buf, bufSize, PSTR("%s: %s\r\n"), header.name().c_str(), header.value().c_str());
     out.concat(buf);
   }
-  _headers.free();
+  _headers.clear();
 
   out.concat(F("\r\n"));
   _headLength = out.length();
@@ -675,16 +672,15 @@ size_t AsyncProgmemResponse::_fillBuffer(uint8_t *data, size_t len){
  * Response Stream (You can print/write/printf to it, up to the contentLen bytes)
  * */
 
-AsyncResponseStream::AsyncResponseStream(const String& contentType, size_t bufferSize){
+AsyncResponseStream::AsyncResponseStream(const String& contentType, size_t bufferSize)
+{
   _code = 200;
   _contentLength = 0;
   _contentType = contentType;
-  _content = new cbuf(bufferSize);
+  _content = std::unique_ptr<cbuf>(new cbuf(bufferSize)); //std::make_unique<cbuf>(bufferSize);
 }
 
-AsyncResponseStream::~AsyncResponseStream(){
+AsyncResponseStream::~AsyncResponseStream() = default;
-  delete _content;
-}
 
 size_t AsyncResponseStream::_fillBuffer(uint8_t *buf, size_t maxLen){
   return _content->read((char*)buf, maxLen);