/****************************************************************************************************************************
Async_AdvancedWebServer_SendChunked.ino
For Teensy41 with QNEthernet
AsyncWebServer_Teensy41 is a library for the Teensy41 with QNEthernet
Based on and modified from ESPAsyncWebServer (https://github.com/me-no-dev/ESPAsyncWebServer)
Built by Khoi Hoang https://github.com/khoih-prog/AsyncWebServer_Teensy41
Licensed under GPLv3 license
Copyright (c) 2015, Majenko Technologies
All rights reserved.
Redistribution and use in source and binary forms, with or without modification,
are permitted provided that the following conditions are met:
Redistributions of source code must retain the above copyright notice, this
list of conditions and the following disclaimer.
Redistributions in binary form must reproduce the above copyright notice, this
list of conditions and the following disclaimer in the documentation and/or
other materials provided with the distribution.
Neither the name of Majenko Technologies nor the names of its
contributors may be used to endorse or promote products derived from
this software without specific prior written permission.
THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" AND
ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE FOR
ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
(INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON
ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
(INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*****************************************************************************************************************************/
#if !( defined(CORE_TEENSY) && defined(__IMXRT1062__) && defined(ARDUINO_TEENSY41) )
#error Only Teensy 4.1 supported
#endif
// Debug Level from 0 to 4
#define _TEENSY41_ASYNC_TCP_LOGLEVEL_ 1
#define _AWS_TEENSY41_LOGLEVEL_ 4
#define SHIELD_TYPE "Teensy4.1 QNEthernet"
#if (_AWS_TEENSY41_LOGLEVEL_ > 3)
#warning Using QNEthernet lib for Teensy 4.1. Must also use Teensy Packages Patch or error
#endif
#define USING_DHCP true
//#define USING_DHCP false
#if !USING_DHCP
// Set the static IP address to use if the DHCP fails to assign
IPAddress myIP(192, 168, 2, 222);
IPAddress myNetmask(255, 255, 255, 0);
IPAddress myGW(192, 168, 2, 1);
//IPAddress mydnsServer(192, 168, 2, 1);
IPAddress mydnsServer(8, 8, 8, 8);
#endif
#include "QNEthernet.h" // https://github.com/ssilverman/QNEthernet
using namespace qindesign::network;
#include <AsyncWebServer_Teensy41.h>
AsyncWebServer server(80);
int reqCount = 0; // number of requests received
const int led = 13;
// In bytes
#define STRING_SIZE 40000
#define BUFFER_SIZE 512
char temp[BUFFER_SIZE];
void handleRoot(AsyncWebServerRequest *request)
{
digitalWrite(led, 1);
int sec = millis() / 1000;
int min = sec / 60;
int hr = min / 60;
int day = hr / 24;
snprintf(temp, BUFFER_SIZE - 1,
"<html>\
<head>\
<meta http-equiv='refresh' content='5'/>\
<title>AsyncWebServer-%s</title>\
<style>\
body { background-color: #cccccc; font-family: Arial, Helvetica, Sans-Serif; Color: #000088; }\
</style>\
</head>\
<body>\
<h2>Async_AdvancedWebServer_SendChunked !</h2>\
<h3>running on %s</h3>\
<p>Uptime: %d d %02d:%02d:%02d</p>\
<img src=\"/test.svg\" />\
</body>\
</html>", BOARD_NAME, BOARD_NAME, day, hr % 24, min % 60, sec % 60);
request->send(200, "text/html", temp);
digitalWrite(led, 0);
}
void handleNotFound(AsyncWebServerRequest *request)
{
digitalWrite(led, 1);
String message = "File Not Found\n\n";
message += "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);
digitalWrite(led, 0);
}
String out;
void drawGraph(AsyncWebServerRequest *request)
{
out.reserve(STRING_SIZE);
char temp[70];
out = String();
out += "<svg xmlns=\"http://www.w3.org/2000/svg\" version=\"1.1\" width=\"1810\" height=\"150\">\n";
out += "<rect width=\"1810\" height=\"150\" fill=\"rgb(250, 230, 210)\" stroke-width=\"2\" stroke=\"rgb(0, 0, 0)\" />\n";
out += "<g stroke=\"blue\">\n";
int y = rand() % 130;
for (int x = 10; x < 5000; x += 10)
{
int y2 = rand() % 130;
sprintf(temp, "<line x1=\"%d\" y1=\"%d\" x2=\"%d\" y2=\"%d\" stroke-width=\"2\" />\n", x, 140 - y, x + 10, 140 - y2);
out += temp;
y = y2;
}
out += "</g>\n</svg>\n";
LOGDEBUG1("Total length to send in chunks =", out.length());
AsyncWebServerResponse *response = request->beginChunkedResponse("image/svg+xml", [](uint8_t *buffer, size_t maxLen,
size_t filledLength) -> size_t
{
size_t len = min(maxLen, out.length() - filledLength);
memcpy(buffer, out.c_str() + filledLength, len);
LOGDEBUG1("Bytes sent in chunk =", len);
return len;
});
request->send(response);
}
void setup()
{
pinMode(led, OUTPUT);
digitalWrite(led, 0);
Serial.begin(115200);
while (!Serial && millis() < 5000);
delay(200);
Serial.print("\nStart Async_AdvancedWebServer_SendChunked on ");
Serial.print(BOARD_NAME);
Serial.print(" with ");
Serial.println(SHIELD_TYPE);
Serial.println(ASYNC_WEBSERVER_TEENSY41_VERSION);
///////////////////////////////////
delay(500);
#if USING_DHCP
// Start the Ethernet connection, using DHCP
Serial.print("Initialize Ethernet using DHCP => ");
Ethernet.begin();
#else
// Start the Ethernet connection, using static IP
Serial.print("Initialize Ethernet using static IP => ");
Ethernet.begin(myIP, myNetmask, myGW);
Ethernet.setDNSServerIP(mydnsServer);
#endif
if (!Ethernet.waitForLocalIP(5000))
{
Serial.println(F("Failed to configure Ethernet"));
if (!Ethernet.linkStatus())
{
Serial.println(F("Ethernet cable is not connected."));
}
// Stay here forever
while (true)
{
delay(1);
}
}
else
{
Serial.print(F("Connected! IP address:"));
Serial.println(Ethernet.localIP());
}
#if USING_DHCP
delay(1000);
#else
delay(2000);
#endif
///////////////////////////////////
server.on("/", HTTP_GET, [](AsyncWebServerRequest * request)
{
handleRoot(request);
});
server.on("/test.svg", HTTP_GET, [](AsyncWebServerRequest * request)
{
drawGraph(request);
});
server.on("/inline", [](AsyncWebServerRequest * request)
{
request->send(200, "text/plain", "This works as well");
});
server.onNotFound(handleNotFound);
server.begin();
Serial.print(F("AsyncWebServer is @ IP : "));
Serial.println(Ethernet.localIP());
}
void heartBeatPrint()
{
static int num = 1;
Serial.print(F("."));
if (num == 80)
{
Serial.println();
num = 1;
}
else if (num++ % 10 == 0)
{
Serial.print(F(" "));
}
}
void check_status()
{
static unsigned long checkstatus_timeout = 0;
#define STATUS_CHECK_INTERVAL 10000L
// Send status report every STATUS_REPORT_INTERVAL (60) seconds: we don't need to send updates frequently if there is no status change.
if ((millis() > checkstatus_timeout) || (checkstatus_timeout == 0))
{
heartBeatPrint();
checkstatus_timeout = millis() + STATUS_CHECK_INTERVAL;
}
}
void loop()
{
check_status();
}
