115 lines
3.7 KiB
C++
115 lines
3.7 KiB
C++
/*
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Asynchronous WebServer library for Espressif MCUs
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Copyright (c) 2016 Hristo Gochkov. All rights reserved.
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This library is free software; you can redistribute it and/or
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modify it under the terms of the GNU Lesser General Public
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License as published by the Free Software Foundation; either
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version 2.1 of the License, or (at your option) any later version.
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This library is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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Lesser General Public License for more details.
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You should have received a copy of the GNU Lesser General Public
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License along with this library; if not, write to the Free Software
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Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
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*/
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#ifndef ASYNCEVENTSOURCE_H_
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#define ASYNCEVENTSOURCE_H_
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#include <Arduino.h>
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#ifdef ESP32
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#include <AsyncTCP.h>
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#else
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#include <ESPAsyncTCP.h>
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#endif
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#include <ESPAsyncWebServer.h>
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class AsyncEventSource;
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class AsyncEventSourceResponse;
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class AsyncEventSourceClient;
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typedef std::function<void(AsyncEventSourceClient *client)> ArEventHandlerFunction;
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class AsyncEventSourceMessage {
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private:
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uint8_t * _data;
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size_t _len;
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size_t _sent;
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//size_t _ack;
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size_t _acked;
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public:
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AsyncEventSourceMessage(const char * data, size_t len);
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~AsyncEventSourceMessage();
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size_t ack(size_t len, uint32_t time __attribute__((unused)));
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size_t send(AsyncClient *client);
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bool finished(){ return _acked == _len; }
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bool sent() { return _sent == _len; }
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};
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class AsyncEventSourceClient {
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private:
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AsyncClient *_client;
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AsyncEventSource *_server;
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uint32_t _lastId;
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LinkedList<AsyncEventSourceMessage *> _messageQueue;
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void _queueMessage(AsyncEventSourceMessage *dataMessage);
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void _runQueue();
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public:
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AsyncEventSourceClient(AsyncWebServerRequest *request, AsyncEventSource *server);
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~AsyncEventSourceClient();
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AsyncClient* client(){ return _client; }
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void close();
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void write(const char * message, size_t len);
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void send(const char *message, const char *event=NULL, uint32_t id=0, uint32_t reconnect=0);
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bool connected() const { return (_client != NULL) && _client->connected(); }
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uint32_t lastId() const { return _lastId; }
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//system callbacks (do not call)
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void _onAck(size_t len, uint32_t time);
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void _onPoll();
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void _onTimeout(uint32_t time);
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void _onDisconnect();
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};
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class AsyncEventSource: public AsyncWebHandler {
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private:
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String _url;
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LinkedList<AsyncEventSourceClient *> _clients;
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ArEventHandlerFunction _connectcb;
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public:
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AsyncEventSource(const String& url);
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~AsyncEventSource();
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const char * url() const { return _url.c_str(); }
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void close();
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void onConnect(ArEventHandlerFunction cb);
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void send(const char *message, const char *event=NULL, uint32_t id=0, uint32_t reconnect=0);
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size_t count() const; //number clinets connected
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//system callbacks (do not call)
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void _addClient(AsyncEventSourceClient * client);
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void _handleDisconnect(AsyncEventSourceClient * client);
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virtual bool canHandle(AsyncWebServerRequest *request) override final;
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virtual void handleRequest(AsyncWebServerRequest *request) override final;
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};
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class AsyncEventSourceResponse: public AsyncWebServerResponse {
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private:
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String _content;
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AsyncEventSource *_server;
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public:
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AsyncEventSourceResponse(AsyncEventSource *server);
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void _respond(AsyncWebServerRequest *request);
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size_t _ack(AsyncWebServerRequest *request, size_t len, uint32_t time);
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bool _sourceValid() const { return true; }
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};
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#endif /* ASYNCEVENTSOURCE_H_ */
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