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handleHttp.ino
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const char* websocketPageHead = R"(
<!DOCTYPE html><html><head><title>RakuTemp</title>
<script src='Chart.bundle.min.js'></script>
<style>
html * {
font-family: Arial;
}
</style>
<script>
var waitingForData = false;
var numData1 = 0;
var dataIdx1 = 0;
var numData2 = 0;
var dataIdx2 = 0;
//var numChunks = 0;
var chunkIdx1 = 0;
var chunkIdx2 = 0;
var numData1Added = 0;
var numData2Added = 0;
var MAX_SAMPLES = 2048;
var connection = new WebSocket('ws://'+location.hostname+':81/', ['arduino']);
connection.binaryType = 'arraybuffer';
var s1 = new Uint16Array(MAX_SAMPLES);
var s2 = new Uint16Array(MAX_SAMPLES);
connection.onopen = function () {
connection.send('Connect ' + new Date());
};
connection.onerror = function (error) {
console.log('WebSocket Error ', error);
};
connection.onmessage = function (e) {
console.log('onmsg type: ', typeof(e.data));
console.log('onmsg data: ', e.data);
if (typeof(e.data) == 'object') {
var data = e.data;
var dv = new DataView(data);
/*var idx = dataIdx1 - numData1;
if (idx < 0) idx += MAX_SAMPLES;
for (var n=0; n<numData1; n++) {
var tmp = dv.getUint16(idx*2, true);
console.log("idx " + idx + ": " + tmp);
if (++idx >= MAX_SAMPLES) idx = 0;
}*/
if (chunkIdx1 < MAX_SAMPLES) {
for (var n=0; n<MAX_SAMPLES/2; n++) {
s1[chunkIdx1++] = dv.getUint16(n*2, true);
}
}
else {
for (var n=0; n<MAX_SAMPLES/2; n++) {
s2[chunkIdx2++] = dv.getUint16(n*2, true);
}
}
if (chunkIdx2 == MAX_SAMPLES) {
console.log('All data received');
var idx = dataIdx1 - numData1;
if (idx < 0) idx += MAX_SAMPLES;
for (var n=0; n<numData1; n++) {
cfg.data.labels.push(numData1Added);
cfg.data.datasets[0].data.push(s1[idx]);
numData1Added++;
if (++idx >= MAX_SAMPLES) idx = 0;
}
myChart.update();
idx = dataIdx2 - numData2;
if (idx < 0) idx += MAX_SAMPLES;
for (var n=0; n<numData2; n++) {
cfg2.data.labels.push(numData2Added);
cfg2.data.datasets[0].data.push(s2[idx]);
numData2Added++;
if (++idx >= MAX_SAMPLES) idx = 0;
}
myChart2.update();
waitingForData = false;
}
}
if (typeof(e.data) == 'string') {
var tmp = e.data.split(' ');
if (tmp[0] == "D") {
waitingForData = true;
cfg.data.labels = [];
cfg.data.datasets[0].data = [];
dataIdx1 = parseInt(tmp[1]);
numData1 = parseInt(tmp[2]);
dataIdx2 = parseInt(tmp[3]);
numData2 = parseInt(tmp[4]);
chunkIdx1 = 0;
chunkIdx2 = 0;
var _max = parseInt(tmp[5]);
console.log('MAX_SAMPLES - ESP: ' + _max + ' WEB: ' + MAX_SAMPLES);
}
else {
//console.log('Server: ', e.data);
var _temp = parseInt(tmp[0]);
var _millis = parseInt(tmp[1]);
if (waitingForData) {
}
else {
console.log(_temp);
document.getElementById('a').innerHTML = _temp;
if(cfg.data.datasets[0].data.length == MAX_SAMPLES){
cfg.data.datasets[0].data.shift();
cfg.data.labels.shift();
}
cfg.data.labels.push(numData1Added);
cfg.data.datasets[0].data.push(_temp);
numData1Added++;
myChart.update();
if (tmp.length > 2) {
if(cfg2.data.datasets[0].data.length == MAX_SAMPLES){
cfg2.data.datasets[0].data.shift();
cfg2.data.labels.shift();
}
cfg2.data.labels.push(numData2Added);
cfg2.data.datasets[0].data.push(_temp);
numData2Added++;
myChart2.update();
}
}
}
}
};
</script>)";
const char* websocketPageBody = R"(
<center style='font-size: 200%;'>
RakuTemp <b><span id='a'></span></b><br/>
<canvas id='myChart' width='400' height='240'></canvas>
<canvas id='myChart2' width='400' height='150'></canvas>
</center><br/>
<script>
var ctx = document.getElementById('myChart');
var cfg = {
type: 'line',
data: {
labels: [],
datasets: [{
radius: 0,
backgroundColor : 'rgba(243,134,48,0.5)',
borderColor : 'rgba(243,134,48,1)',
borderWidth : 2,
label: '68min',
data: []
}]
},
options: {
scales:
{
xAxes: [{
display: false
}]
}
}
};
var ctx2 = document.getElementById('myChart2');
var cfg2 = {
type: 'line',
data: {
labels: [],
datasets: [{
radius: 0,
backgroundColor : 'rgba(167,219,216,0.5)',
borderColor : 'rgba(167,219,216,1)',
borderWidth : 2,
label: '17h',
data: []
}]
},
options: {
scales:
{
xAxes: [{
display: false
}]
}
}
};
var myChart = new Chart(ctx, cfg);
var myChart2 = new Chart(ctx2, cfg2);
</script>)";
/** Handle root or redirect to captive portal */
void handleRoot() {
if (captivePortal()) { // If caprive portal redirect instead of displaying the page.
return;
}
server.sendHeader("Cache-Control", "no-cache, no-store, must-revalidate");
server.sendHeader("Pragma", "no-cache");
server.sendHeader("Expires", "-1");
server.setContentLength(CONTENT_LENGTH_UNKNOWN);
server.send(200, "text/html", ""); // Empty content inhibits Content-length header so we have to close the socket ourselves.
server.sendContent(
"<html><head>"
);
server.sendContent(websocketPageHead);
server.sendContent(
"</head><body>"
);
server.sendContent(websocketPageBody);
server.sendContent(
"<p>You may want to <a href='/wifi'>config the wifi connection</a>, <a href='/'>refresh this page</a> or <a href='/update'>update the firmware</a>.</p>"
"</body></html>"
);
if (server.client().localIP() == apIP) {
server.sendContent(String("<p>You are connected through the soft AP: ") + softAP_ssid + "</p>");
} else {
server.sendContent(String("<p>You are connected through the wifi network: ") + ssid + "</p>");
}
server.client().stop(); // Stop is needed because we sent no content length
}
/** Redirect to captive portal if we got a request for another domain. Return true in that case so the page handler do not try to handle the request again. */
boolean captivePortal() {
if (!isIp(server.hostHeader()) && server.hostHeader() != (String(myHostname)+".local")) {
Serial.print("Request redirected to captive portal");
server.sendHeader("Location", String("http://") + toStringIp(server.client().localIP()), true);
server.send ( 302, "text/plain", ""); // Empty content inhibits Content-length header so we have to close the socket ourselves.
server.client().stop(); // Stop is needed because we sent no content length
return true;
}
return false;
}
/** Wifi config page handler */
void handleWifi() {
server.sendHeader("Cache-Control", "no-cache, no-store, must-revalidate");
server.sendHeader("Pragma", "no-cache");
server.sendHeader("Expires", "-1");
server.setContentLength(CONTENT_LENGTH_UNKNOWN);
server.send(200, "text/html", ""); // Empty content inhibits Content-length header so we have to close the socket ourselves.
server.sendContent(
"<html><head></head><body>"
"<h1>Wifi config</h1>"
);
if (server.client().localIP() == apIP) {
server.sendContent(String("<p>You are connected through the soft AP: ") + softAP_ssid + "</p>");
} else {
server.sendContent(String("<p>You are connected through the wifi network: ") + ssid + "</p>");
}
server.sendContent(
"\r\n<br />"
"<table><tr><th align='left'>SoftAP config</th></tr>"
);
server.sendContent(String() + "<tr><td>SSID " + String(softAP_ssid) + "</td></tr>");
server.sendContent(String() + "<tr><td>IP " + toStringIp(WiFi.softAPIP()) + "</td></tr>");
server.sendContent(
"</table>"
"\r\n<br />"
"<table><tr><th align='left'>WLAN config</th></tr>"
);
server.sendContent(String() + "<tr><td>SSID " + String(ssid) + "</td></tr>");
server.sendContent(String() + "<tr><td>IP " + toStringIp(WiFi.localIP()) + "</td></tr>");
server.sendContent(
"</table>"
"\r\n<br />"
"<table><tr><th align='left'>WLAN list (refresh if any missing)</th></tr>"
);
Serial.println("scan start");
int n = WiFi.scanNetworks();
Serial.println("scan done");
if (n > 0) {
for (int i = 0; i < n; i++) {
server.sendContent(String() + "\r\n<tr><td>SSID " + WiFi.SSID(i) + String((WiFi.encryptionType(i) == ENC_TYPE_NONE)?" ":" *") + " (" + WiFi.RSSI(i) + ")</td></tr>");
}
} else {
server.sendContent(String() + "<tr><td>No WLAN found</td></tr>");
}
server.sendContent(
"</table>"
"\r\n<br /><form method='POST' action='wifisave'><h4>Connect to network:</h4>"
"<input type='text' placeholder='network' name='n'/>"
"<br /><input type='password' placeholder='password' name='p'/>"
"<br /><input type='submit' value='Connect/Disconnect'/></form>"
"<p>You may want to <a href='/'>return to the home page</a>.</p>"
"</body></html>"
);
server.client().stop(); // Stop is needed because we sent no content length
}
/** Handle the WLAN save form and redirect to WLAN config page again */
void handleWifiSave() {
Serial.println("wifi save");
server.arg("n").toCharArray(ssid, sizeof(ssid) - 1);
server.arg("p").toCharArray(password, sizeof(password) - 1);
server.sendHeader("Location", "wifi", true);
server.sendHeader("Cache-Control", "no-cache, no-store, must-revalidate");
server.sendHeader("Pragma", "no-cache");
server.sendHeader("Expires", "-1");
server.send ( 302, "text/plain", ""); // Empty content inhibits Content-length header so we have to close the socket ourselves.
server.client().stop(); // Stop is needed because we sent no content length
saveCredentials();
connect = strlen(ssid) > 0; // Request WLAN connect with new credentials if there is a SSID
}
void handleNotFound() {
if (captivePortal()) { // If caprive portal redirect instead of displaying the error page.
return;
}
String message = "File Not Found\n\n";
message += "URI: ";
message += server.uri();
message += "\nMethod: ";
message += ( server.method() == HTTP_GET ) ? "GET" : "POST";
message += "\nArguments: ";
message += server.args();
message += "\n";
for ( uint8_t i = 0; i < server.args(); i++ ) {
message += " " + server.argName ( i ) + ": " + server.arg ( i ) + "\n";
}
server.sendHeader("Cache-Control", "no-cache, no-store, must-revalidate");
server.sendHeader("Pragma", "no-cache");
server.sendHeader("Expires", "-1");
server.send ( 404, "text/plain", message );
}