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Commit3a3d1c6

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added ArduinoWiFiServer with send-to-all-clients functionality (#7612)
and with available() working according to Arduino documentationplus PagerServer example
1 parent4436e32 commit3a3d1c6

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2 files changed

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/*
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Pager Server
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The ESP8266WiFi library's WiFiServer and WiFiServerSecure
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work differently then WiFiServer and EthernetSever
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in Arduino networking libraries.
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This example demonstrates the ArduinoWiFiServer,
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which enhances the WiFiServer.
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ArduinoWiFiServer has available() behaving as documented
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and supports send-to-all-clients functionality, which
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is not implemented in ESP8266WiFi library's WiFiServer
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and WiFiServerSecure.
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The example is a simple server that echoes any incoming
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messages to all connected clients. Connect two or more
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telnet sessions to see how server.available() and
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server.print() work.
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created in September 2020 for ESP8266WiFi library
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by Juraj Andrassy https://github.com/jandrassy
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*/
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#include<ESP8266WiFi.h>
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#include<ArduinoWiFiServer.h>
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#ifndef STASSID
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#defineSTASSID"your-ssid"
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#defineSTAPSK"your-password"
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#endif
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constchar* ssid = STASSID;
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constchar* password = STAPSK;
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ArduinoWiFiServerserver(2323);
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voidsetup() {
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Serial.begin(115200);
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Serial.println();
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Serial.print("Connecting to");
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Serial.println(ssid);
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WiFi.begin(ssid, password);
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while (WiFi.status() != WL_CONNECTED) {
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delay(500);
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Serial.print(".");
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}
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server.begin();
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IPAddress ip = WiFi.localIP();
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Serial.println();
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Serial.println("Connected to WiFi network.");
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Serial.print("To access the server, connect with Telnet client to");
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Serial.print(ip);
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Serial.println(" 2323");
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}
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voidloop() {
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WiFiClient client = server.available();// returns first client which has data to read or a 'false' client
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if (client) {// client is true only if it is connected and has data to read
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String s = client.readStringUntil('\n');// read the message incoming from one of the clients
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s.trim();// trim eventual \r
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Serial.println(s);// print the message to Serial Monitor
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client.print("echo:");// this is only for the sending client
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server.println(s);// send the message to all connected clients
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server.flush();// flush the buffers
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}
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}
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/*
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ArduinoWiFiServer.h - Arduino compatible WiFiServer
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implementation for ESP8266Wifi library.
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Copyright (c) 2020 Juraj Andrassy
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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 arduinowifiserver_h
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#definearduinowifiserver_h
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#include<ESP8266WiFi.h>
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#ifndef MAX_MONITORED_CLIENTS
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#defineMAX_MONITORED_CLIENTS5
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#endif
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template<classTServer,classTClient>
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classArduinoComptibleWiFiServerTemplate :publicTServer {
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public:
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ArduinoComptibleWiFiServerTemplate(const IPAddress& addr,uint16_t port) : TServer(addr, port) {}
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ArduinoComptibleWiFiServerTemplate(uint16_t port) : TServer(port) {}
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virtual~ArduinoComptibleWiFiServerTemplate() {}
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// https://www.arduino.cc/en/Reference/EthernetServerAccept
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TClientaccept() {
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returnTServer::available();
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}
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// https://www.arduino.cc/en/Reference/WiFiServerAvailable
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TClientavailable() {
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// update connected clients
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for (uint8_t i =0; i < MAX_MONITORED_CLIENTS; i++) {
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if (!connectedClients[i]) {
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connectedClients[i] =accept();
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}
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}
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// find next client with data available
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for (uint8_t i =0; i < MAX_MONITORED_CLIENTS; i++) {
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if (index == MAX_MONITORED_CLIENTS) {
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index =0;
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}
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TClient& client = connectedClients[index];
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index++;
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if (client.available())
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return client;
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}
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returnTClient();// no client with data found
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}
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virtualsize_twrite(uint8_t b)override {
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returnwrite(&b,1);
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}
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virtualsize_twrite(constuint8_t *buf,size_t size)override {
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if (size ==0)
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return0;
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size_t ret =0;
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size_t a = size;
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while (true) {
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for (uint8_t i =0; i < MAX_MONITORED_CLIENTS; i++) {
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WiFiClient& client = connectedClients[i];
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if (client.status() == ESTABLISHED && client.availableForWrite() < (int) a) {
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a = client.availableForWrite();
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}
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}
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if (a ==0)
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break;
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for (uint8_t i =0; i < MAX_MONITORED_CLIENTS; i++) {
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if (connectedClients[i].status() == ESTABLISHED) {
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connectedClients[i].write(buf, a);
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}
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}
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ret += a;
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if (ret == size)
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break;
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buf += a;
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a = size - ret;
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}
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return ret;
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}
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using Print::write;
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virtualvoidflush()override {
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flush(0);
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}
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virtualvoidflush(unsignedint maxWaitMs) {
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for (uint8_t i =0; i < MAX_MONITORED_CLIENTS; i++) {
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if (connectedClients[i].status() == ESTABLISHED) {
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connectedClients[i].flush(maxWaitMs);
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}
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}
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}
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operatorbool() {
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return (TServer::status() == LISTEN);
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}
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voidclose() {
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TServer::stop();
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for (uint8_t i =0; i < MAX_MONITORED_CLIENTS; i++) {
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if (connectedClients[i]) {
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connectedClients[i].stop();
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}
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}
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}
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voidstop() {close();}
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voidend() {close();}
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private:
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TClient connectedClients[MAX_MONITORED_CLIENTS];
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uint8_t index =0;
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};
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typedef ArduinoComptibleWiFiServerTemplate<WiFiServer, WiFiClient> ArduinoWiFiServer;
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typedef ArduinoComptibleWiFiServerTemplate<WiFiServerSecure, WiFiClientSecure> ArduinoWiFiServerSecure;
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#endif

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