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v1.6.1 to add demo sending in chunks
#### Release v1.6.1 1. Add examples [Async_AdvancedWebServer_SendChunked](https://github.com/khoih-prog/AsyncWebServer_STM32/tree/main/examples/Async_AdvancedWebServer_SendChunked) and [AsyncWebServer_SendChunked](https://github.com/khoih-prog/AsyncWebServer_STM32/tree/main/examples/AsyncWebServer_SendChunked) to demo how to use `beginChunkedResponse()` to send large `html` in chunks 2. Use `allman astyle` and add `utils`
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‎examples/AsyncWebServer_SendChunked/AsyncWebServer_SendChunked.ino‎

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/****************************************************************************************************************************
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AsyncWebServer_SendChunked.ino
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For STM32 with LAN8720 (STM32F4/F7) or built-in LAN8742A Ethernet (Nucleo-144, DISCOVERY, etc)
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AsyncWebServer_STM32 is a library for the STM32 with LAN8720 or built-in LAN8742A Ethernet WebServer
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Based on and modified from ESPAsyncWebServer (https://github.com/me-no-dev/ESPAsyncWebServer)
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Built by Khoi Hoang https://github.com/khoih-prog/AsyncWebServer_STM32
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Licensed under GPLv3 license
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*****************************************************************************************************************************/
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/*
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Currently support
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1) STM32 boards with built-in Ethernet (to use USE_BUILTIN_ETHERNET = true) such as :
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- Nucleo-144 (F429ZI, F767ZI)
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- Discovery (STM32F746G-DISCOVERY)
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- STM32 boards (STM32F/L/H/G/WB/MP1) with 32K+ Flash, with Built-in Ethernet,
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- See How To Use Built-in Ethernet at (https://github.com/khoih-prog/EthernetWebServer_STM32/issues/1)
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2) STM32F/L/H/G/WB/MP1 boards (with 64+K Flash) running ENC28J60 shields (to use USE_BUILTIN_ETHERNET = false)
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3) STM32F/L/H/G/WB/MP1 boards (with 64+K Flash) running W5x00 shields
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4) STM32F4 and STM32F7 boards (with 64+K Flash) running LAN8720 shields
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*/
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#include "defines.h"
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// In bytes
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#define STRING_SIZE 50000
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AsyncWebServer server(80);
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int reqCount = 0; // number of requests received
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const int led = 13;
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#define BUFFER_SIZE 512
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char temp[BUFFER_SIZE];
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void createPage(String &pageInput)
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{
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int sec = millis() / 1000;
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int min = sec / 60;
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int hr = min / 60;
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int day = hr / 24;
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snprintf(temp, BUFFER_SIZE - 1,
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"<html>\
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<head>\
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<meta http-equiv='refresh' content='5'/>\
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<title>AsyncWebServer-%s</title>\
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<style>\
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body { background-color: #cccccc; font-family: Arial, Helvetica, Sans-Serif; Color: #000088; }\
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</style>\
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</head>\
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<body>\
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<h2>AsyncWebServer_SendChunked!</h2>\
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<h3>running on %s</h3>\
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<p>Uptime: %d d %02d:%02d:%02d</p>\
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</body>\
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</html>", BOARD_NAME, BOARD_NAME, day, hr % 24, min % 60, sec % 60);
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pageInput = temp;
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}
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void handleNotFound(AsyncWebServerRequest *request)
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{
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String message = "File Not Found\n\n";
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message += "URI: ";
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message += request->url();
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message += "\nMethod: ";
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message += (request->method() == HTTP_GET) ? "GET" : "POST";
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message += "\nArguments: ";
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message += request->args();
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message += "\n";
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for (uint8_t i = 0; i < request->args(); i++)
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{
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message += " " + request->argName(i) + ": " + request->arg(i) + "\n";
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}
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request->send(404, "text/plain", message);
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}
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String out;
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void handleRoot(AsyncWebServerRequest *request)
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{
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// clear the String to start over
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out = String();
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createPage(out);
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out += "<html><body>\r\n<table><tr><th>INDEX</th><th>DATA</th></tr>";
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for (uint16_t lineIndex = 0; lineIndex < 500; lineIndex++)
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{
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out += "<tr><td>";
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out += String(lineIndex);
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out += "</td><td>";
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out += "AsyncWebServer_SendChunked_ABCDEFGHIJKLMNOPQRSTUVWXYZ</td></tr>";
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}
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out += "</table></body></html>\r\n";
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LOGDEBUG1("Total length to send in chunks =", out.length());
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AsyncWebServerResponse *response = request->beginChunkedResponse("text/html", [](uint8_t *buffer, size_t maxLen, size_t filledLength) -> size_t
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{
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size_t len = min(maxLen, out.length() - filledLength);
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memcpy(buffer, out.c_str() + filledLength, len);
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LOGDEBUG1("Bytes sent in chunk =", len);
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return len;
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});
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request->send(response);
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}
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void setup()
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{
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out.reserve(STRING_SIZE);
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pinMode(led, OUTPUT);
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digitalWrite(led, 0);
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Serial.begin(115200);
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while (!Serial && millis() < 5000);
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delay(200);
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Serial.print("\nStart AsyncWebServer_SendChunked on ");
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Serial.print(BOARD_NAME);
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Serial.print(" with ");
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Serial.println(SHIELD_TYPE);
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Serial.println(ASYNC_WEBSERVER_STM32_VERSION);
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#if (_ASYNCWEBSERVER_STM32_LOGLEVEL_ > 2)
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Serial.print("STM32 Core version v");
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Serial.print(STM32_CORE_VERSION_MAJOR);
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Serial.print(".");
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Serial.print(STM32_CORE_VERSION_MINOR);
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Serial.print(".");
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Serial.println(STM32_CORE_VERSION_PATCH);
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#endif
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// start the ethernet connection and the server
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// Use random mac
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uint16_t index = millis() % NUMBER_OF_MAC;
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// Use Static IP
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//Ethernet.begin(mac[index], ip);
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// Use DHCP dynamic IP and random mac
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Ethernet.begin(mac[index]);
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///////////////////////////////////
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server.on("/", HTTP_GET, [](AsyncWebServerRequest * request)
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{
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handleRoot(request);
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});
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server.on("/inline", [](AsyncWebServerRequest * request)
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{
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request->send(200, "text/plain", "This works as well");
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});
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server.onNotFound(handleNotFound);
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server.begin();
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Serial.print(F("AsyncWebServer is @ IP : "));
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Serial.println(Ethernet.localIP());
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}
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void heartBeatPrint()
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{
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static int num = 1;
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Serial.print(F("."));
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if (num == 80)
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{
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Serial.println();
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num = 1;
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}
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else if (num++ % 10 == 0)
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{
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Serial.print(F(" "));
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}
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}
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void check_status()
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{
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static unsigned long checkstatus_timeout = 0;
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#define STATUS_CHECK_INTERVAL 10000L
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// Send status report every STATUS_REPORT_INTERVAL (60) seconds: we don't need to send updates frequently if there is no status change.
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if ((millis() > checkstatus_timeout) || (checkstatus_timeout == 0))
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{
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heartBeatPrint();
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checkstatus_timeout = millis() + STATUS_CHECK_INTERVAL;
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}
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}
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void loop()
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{
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check_status();
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}

‎examples/AsyncWebServer_SendChunked/defines.h‎

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/****************************************************************************************************************************
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defines.h
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For STM32 with LAN8720 (STM32F4/F7) or built-in LAN8742A Ethernet (Nucleo-144, DISCOVERY, etc)
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AsyncWebServer_STM32 is a library for the STM32 with LAN8720 or built-in LAN8742A Ethernet WebServer
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Based on and modified from ESPAsyncWebServer (https://github.com/me-no-dev/ESPAsyncWebServer)
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Built by Khoi Hoang https://github.com/khoih-prog/AsyncWebServer_STM32
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Licensed under GPLv3 license
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***************************************************************************************************************************************/
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#ifndef defines_h
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#define defines_h
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/*
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Currently support
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1) STM32 boards with built-in Ethernet (to use USE_BUILTIN_ETHERNET = true) such as :
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- Nucleo-144 (F429ZI, F767ZI)
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- Discovery (STM32F746G-DISCOVERY)
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- STM32 boards (STM32F/L/H/G/WB/MP1) with 32K+ Flash, with Built-in Ethernet,
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- See How To Use Built-in Ethernet at (https://github.com/khoih-prog/EthernetWebServer_STM32/issues/1)
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2) STM32F/L/H/G/WB/MP1 boards (with 64+K Flash) running ENC28J60 shields (to use USE_BUILTIN_ETHERNET = false)
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3) STM32F/L/H/G/WB/MP1 boards (with 64+K Flash) running W5x00 shields
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4) STM32F4 and STM32F7 boards (with 64+K Flash) running LAN8720 shields
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*/
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#if !( defined(STM32F0) || defined(STM32F1) || defined(STM32F2) || defined(STM32F3) ||defined(STM32F4) || defined(STM32F7) || \
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defined(STM32L0) || defined(STM32L1) || defined(STM32L4) || defined(STM32H7) ||defined(STM32G0) || defined(STM32G4) || \
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defined(STM32WB) || defined(STM32MP1) )
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#error This code is designed to run on STM32F/L/H/G/WB/MP1 platform! Please check your Tools->Board setting.
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#endif
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#define _ASYNCWEBSERVER_STM32_LOGLEVEL_ 4
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#if defined(STM32F0)
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#warning STM32F0 board selected
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#define BOARD_TYPE "STM32F0"
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#elif defined(STM32F1)
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#warning STM32F1 board selected
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#define BOARD_TYPE "STM32F1"
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#elif defined(STM32F2)
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#warning STM32F2 board selected
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#define BOARD_TYPE "STM32F2"
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#elif defined(STM32F3)
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#warning STM32F3 board selected
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#define BOARD_TYPE "STM32F3"
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#elif defined(STM32F4)
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#warning STM32F4 board selected
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#define BOARD_TYPE "STM32F4"
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#elif defined(STM32F7)
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#warning STM32F7 board selected
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#define BOARD_TYPE "STM32F7"
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#elif defined(STM32L0)
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#warning STM32L0 board selected
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#define BOARD_TYPE "STM32L0"
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#elif defined(STM32L1)
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#warning STM32L1 board selected
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#define BOARD_TYPE "STM32L1"
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#elif defined(STM32L4)
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#warning STM32L4 board selected
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#define BOARD_TYPE "STM32L4"
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#elif defined(STM32H7)
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#warning STM32H7 board selected
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#define BOARD_TYPE "STM32H7"
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#elif defined(STM32G0)
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#warning STM32G0 board selected
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#define BOARD_TYPE "STM32G0"
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#elif defined(STM32G4)
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#warning STM32G4 board selected
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#define BOARD_TYPE "STM32G4"
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#elif defined(STM32WB)
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#warning STM32WB board selected
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#define BOARD_TYPE "STM32WB"
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#elif defined(STM32MP1)
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#warning STM32MP1 board selected
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#define BOARD_TYPE "STM32MP1"
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#else
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#warning STM32 unknown board selected
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#define BOARD_TYPE "STM32 Unknown"
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#endif
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#ifndef BOARD_NAME
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#define BOARD_NAME BOARD_TYPE
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#endif
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#define SHIELD_TYPE "LAN8742A built-in Ethernet"
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#include <LwIP.h>
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#include <STM32Ethernet.h>
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#include <AsyncWebServer_STM32.h>
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// Enter a MAC address and IP address for your controller below.
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#define NUMBER_OF_MAC 20
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byte mac[][NUMBER_OF_MAC] =
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{
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{ 0xDE, 0xAD, 0xBE, 0xEF, 0x32, 0x01 },
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{ 0xDE, 0xAD, 0xBE, 0xEF, 0x32, 0x02 },
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{ 0xDE, 0xAD, 0xBE, 0xEF, 0x32, 0x03 },
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{ 0xDE, 0xAD, 0xBE, 0xEF, 0x32, 0x04 },
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{ 0xDE, 0xAD, 0xBE, 0xEF, 0x32, 0x05 },
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{ 0xDE, 0xAD, 0xBE, 0xEF, 0x32, 0x06 },
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{ 0xDE, 0xAD, 0xBE, 0xEF, 0x32, 0x07 },
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{ 0xDE, 0xAD, 0xBE, 0xEF, 0x32, 0x08 },
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{ 0xDE, 0xAD, 0xBE, 0xEF, 0x32, 0x09 },
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{ 0xDE, 0xAD, 0xBE, 0xEF, 0x32, 0x0A },
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{ 0xDE, 0xAD, 0xBE, 0xEF, 0x32, 0x0B },
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{ 0xDE, 0xAD, 0xBE, 0xEF, 0x32, 0x0C },
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{ 0xDE, 0xAD, 0xBE, 0xEF, 0x32, 0x0D },
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{ 0xDE, 0xAD, 0xBE, 0xEF, 0x32, 0x0E },
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{ 0xDE, 0xAD, 0xBE, 0xEF, 0x32, 0x0F },
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{ 0xDE, 0xAD, 0xBE, 0xEF, 0x32, 0x10 },
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{ 0xDE, 0xAD, 0xBE, 0xEF, 0x32, 0x11 },
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{ 0xDE, 0xAD, 0xBE, 0xEF, 0x32, 0x12 },
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{ 0xDE, 0xAD, 0xBE, 0xEF, 0x32, 0x13 },
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{ 0xDE, 0xAD, 0xBE, 0xEF, 0x32, 0x14 },
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};
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// Select the IP address according to your local network
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IPAddress ip(192, 168, 2, 232);
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#endif //defines_h

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