esp32_https_server/examples/REST-API/data/public/index.html at master · NoX209/esp32_https_server · GitHub

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<!DOCTYPE html>

<html>

<head>

<title>esp32_https_server - REST API example</title>

</head>

// Local copy of the event list

let events = [];

// Local copy of the uptime

let uptime = 0;

// This function synchronizes the uptime every 10s

function updateUptime() {

$.ajax({

// Target

url: '/api/uptime',

// Method

type: 'GET',

// Data we expect back

dataType: 'json',

}).done(res => {

// Update now and keep track for 10s

$('#uptime').text(res.uptime);

for(let i = 0; i < 10; i++) {

const t = res.uptime + i;

setTimeout(() => {

uptime = t;

$('#uptime').text(t);

updateTable();

}, i*1000);

}

}).always(() => {

// Synchronize again after 10s

setTimeout(updateUptime, 10000);

});

}

// This function will update the event list every 60s

function updateEventlist() {

$.ajax({

// Target

url: '/api/events',

// Method

type: 'GET',

// Data we expect back

dataType: 'json',

}).done(res => {

// Replace list in-place

while(events.length>0) events.pop();

res.forEach(e => events.push(e));

updateTable();

}).always(() => {

// Poll again after 60s

// The add and delete method keep the list synchronized.

setTimeout(updateUptime, 60000);

});

}

// Adds an event based on the form

function addEvent() {

$.post({

// Target

url: '/api/events',

// Data we expect back

dataType: 'json',

// We will send json, so set the content type

contentType: "application/json; charset=utf-8",

// The data we send. JSON.stringify creates json from this object

data: JSON.stringify({

gpio: Number.parseInt($('#evGPIO').val()),

state: $('#evState').is(':checked') ? 1 : 0,

time: Number.parseInt($('#evTime').val()),

})

}).done(addedEvent => {

events.push(addedEvent);

updateTable();

}).fail(() => {

alert('Adding the event failed.');

});

}

// Deletes an event

function deleteEvent(eventid) {

$.ajax({

// Target

url: '/api/events/'+eventid,

// Data we expect back

dataType: 'json',

// We want a delete request

type: 'DELETE',

}).done(addedEvent => {

// in-place filtering

let tmpEvents = [];

while(events.length > 0) {

let e = events.pop();

if (e.id !== eventid) tmpEvents.push(e);

}

tmpEvents.forEach(e => events.push(e));

updateTable();

}).fail(() => {

alert('Adding the event failed.');

});

}

// Re-renders the event table

function updateTable() {

sortedEvents = events

// Filter old events

.filter(ev => ev.time >= uptime)

// Sort by time

.sort((a,b) => a.time===b.time ? 0 : (a.time < b.time ? -1 : 1));

// Clear table

$('#tbody').html("");

// Rewrite table

sortedEvents.forEach(ev => $('#tbody').append(

'<tr><td>'+ev.time+'</td><td>GPIO'+ev.gpio+'</td><td>'+(ev.state===1?'HIGH':'LOW')+'</td>' +

'<td><button type=\"button\" onClick=\"deleteEvent('+ev.id+');\">Delete</button></td></tr>'

));

}

// When the page is ready...

$(document).ready(() => {

// Initially update uptime:

updateUptime();

// Initially poll the events

updateEventlist();

});

</script>

<style>

* {

font-family: sans-serif;

font-size: 12px;

}

h1 {

font-size:16px;

font-weight: bold;

}

h2 {

font-size: 14px;

font-weight: bold;

}

td {

border: 1px solid gray;

border-collapse: collapse;

padding: 3px;

width: 180px;

}

th {

background: darkblue;

color: white;

border-collapse: collapse;

padding:3px;

font-weight: bold;

width: 180px;

}

input {

max-width:50px;

}

</style>

<body>

<h1>esp32_https_server - REST API example</h1>

<p><strong>Current system time:</strong> <span id="uptime">loading...</span></p>

<h2>Current Events</h2>

<table>

<thead>

<tr>

<th>New State</th>

</tr>

</thead>

</tbody>

</table>

<h2>Add a New Event</h2>

<table>

<thead>

<tr>

<th>State</th>

</tr>

</thead>

<tr>

<td>

</select>

</td>

<td>

<input type="checkbox" id="evState" /> HIGH

</td>

</tr>

</tbody>

</table>

</form>

<h2>About This Example</h2>

<p>This example shows you a web-page that can be used to control GPIOs 25, 26, 27, 32 and 33 to be turned on or off at a given time.</p>

<p>For simplicity, we use the system uptime here, which you can see at the top of the page.</p>

<p>The page uses the REST API provided at /api to commuicate with the ESP32.</p>

<p><strong>GET /api/uptime</strong> returns the current system uptime:</p>

<pre>{"uptime":42}</pre>

<p>This node is polled every 10 seconds to stay synchronized.</p>

<p><strong>GET /api/events</strong> returns the current list of events:</p>

<pre>[{"gpio":27,"state":1,"time":42,"id":0}, ...]</pre>

<p>This node is polled every 60 seconds to stay synchronized</p>

<p><strong>POST /api/events</strong> can be used to add new events. The response object will contain an additional id that can be used to refer to the event.</p>

<p><strong>DELETE /api/events/<em>id</em></strong> will delete the event with the specified id. If events are executed (time < uptime), they are deleted as well.</p>

<p>The client side javascript synchronizes your view even if not explicit request is sent to the ESP32.</p>

</body>

</html>

esp32_https_server/examples/REST-API/data/public/index.html at master · NoX209/esp32_https_server · GitHub

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