-
Notifications
You must be signed in to change notification settings - Fork 0
/
2019-10-17-http-connectivity.html
346 lines (236 loc) · 15 KB
/
2019-10-17-http-connectivity.html
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
337
338
339
340
341
342
343
344
345
346
<!DOCTYPE html>
<html>
<head>
<meta charset="utf-8">
<meta http-equiv="X-UA-Compatible" content="IE=edge">
<meta name="viewport" content="width=device-width, initial-scale=1">
<meta name="description" content="">
<meta name="keywords" content="blog, ">
<title> Integration of HTTP endpoints/webhooks • Eclipse Ditto™</title>
<link rel="stylesheet" href="css/syntax.css">
<link rel="stylesheet" type="text/css" href="https://cdnjs.cloudflare.com/ajax/libs/font-awesome/4.7.0/css/font-awesome.min.css" crossorigin="anonymous">
<link rel="stylesheet" href="css/modern-business.css">
<link rel="stylesheet" href="https://cdnjs.cloudflare.com/ajax/libs/twitter-bootstrap/3.4.1/css/bootstrap.min.css" crossorigin="anonymous">
<link rel="stylesheet" href="css/customstyles.css">
<link rel="stylesheet" href="css/boxshadowproperties.css">
<link rel="stylesheet" href="css/theme-ditto.css">
<link rel="stylesheet" href="https://fonts.googleapis.com/css?family=Open+Sans:400,700|Source+Code+Pro:300,600|Titillium+Web:400,600,700">
<script src="https://cdnjs.cloudflare.com/ajax/libs/jquery/3.7.1/jquery.min.js" crossorigin="anonymous"></script>
<script src="https://cdnjs.cloudflare.com/ajax/libs/twitter-bootstrap/3.4.1/js/bootstrap.min.js" crossorigin="anonymous"></script>
<script src="https://cdnjs.cloudflare.com/ajax/libs/anchor-js/2.1.0/anchor.min.js" crossorigin="anonymous"></script>
<script src="js/toc.js"></script>
<script src="js/customscripts.js"></script>
<script type="application/ld+json">
{
"@context": "http://schema.org",
"@type": "Organization",
"url": "https://www.eclipse.dev/ditto/",
"logo": "https://www.eclipse.dev/ditto/images/ditto.svg"
}
</script>
<link rel="icon" type="image/png" href="images/favicon-16x16.png" sizes="16x16">
<link rel="icon" type="image/png" href="images/favicon-32x32.png" sizes="32x32">
<link rel="icon" type="image/png" href="images/favicon-96x96.png" sizes="96x96">
<link rel="alternate" type="application/rss+xml" title="Eclipse Ditto Blog" href="https://www.eclipse.dev/ditto/feed.xml">
<!-- Eclipse Foundation cookie consent: -->
<link rel="stylesheet" type="text/css" href="https://www.eclipse.org/eclipse.org-common/themes/solstice/public/stylesheets/vendor/cookieconsent/cookieconsent.min.css" />
<script src="https://www.eclipse.org/eclipse.org-common/themes/solstice/public/javascript/vendor/cookieconsent/default.min.js"></script>
<script>
$(document).ready(function() {
$("#tg-sb-link").click(function() {
$("#tg-sb-sidebar").toggle();
$("#tg-sb-content").toggleClass('col-md-9');
$("#tg-sb-content").toggleClass('col-md-12');
$("#tg-sb-icon").toggleClass('fa-toggle-on');
$("#tg-sb-icon").toggleClass('fa-toggle-off');
});
});
</script>
</head>
<script>
(function(w,d,s,l,i){
w[l]=w[l]||[];
w[l].push({'gtm.start':
new Date().getTime(),event:'gtm.js'});
var f=d.getElementsByTagName(s)[0],
j=d.createElement(s),
dl=l!='dataLayer'?'&l='+l:'';
j.async=true;
j.src='https://www.googletagmanager.com/gtm.js?id='+i+dl;
f.parentNode.insertBefore(j,f);
})(window,document,'script','dataLayer','GTM-5WLCZXC');
</script>
<body>
<!-- Navigation -->
<nav class="navbar navbar-inverse navbar-fixed-top">
<div class="container topnavlinks">
<div class="navbar-header">
<button type="button" class="navbar-toggle" data-toggle="collapse" data-target="#bs-example-navbar-collapse-1">
<span class="sr-only">Toggle navigation</span>
<span class="icon-bar"></span>
<span class="icon-bar"></span>
<span class="icon-bar"></span>
</button>
<a class="navbar-ditto-home" href="index.html"> <img src="images/ditto_allwhite_symbolonly.svg" class="ditto-navbar-symbol" alt="Home"> <img src="images/ditto_allwhite_textonly.svg" class="ditto-navbar-symbol-text" alt="Eclipse Ditto™"></a>
</div>
<div class="collapse navbar-collapse" id="bs-example-navbar-collapse-1">
<ul class="nav navbar-nav navbar-right">
<!-- toggle sidebar button -->
<!--<li><a id="tg-sb-link" href="#"><i id="tg-sb-icon" class="fa fa-toggle-on"></i> Nav</a></li>-->
<!-- entries without drop-downs appear here -->
<li><a href="blog.html">Blog</a></li>
<li><a href="intro-overview.html">Documentation</a></li>
<li><a href="http-api-doc.html">HTTP API</a></li>
<li><a href="sandbox.html">Sandbox</a></li>
<li><a href="https://github.com/eclipse-ditto/ditto" target="_blank">
<img src="images/GitHub-Mark-Light-32px.png" alt="Sources at GitHub">
</a></li>
<li><a href="https://github.com/eclipse-ditto/ditto-clients" target="_blank">
<img src="images/GitHub-Mark-Light-32px.png" alt="SDK sources at GitHub">SDKs
</a></li>
<li><a href="https://github.com/eclipse-ditto/ditto-examples" target="_blank">
<img src="images/GitHub-Mark-Light-32px.png" alt="Example sources at GitHub">examples
</a></li>
<!-- entries with drop-downs appear here -->
<!-- conditional logic to control which topnav appears for the audience defined in the configuration file.-->
<li class="dropdown">
<a href="#" class="dropdown-toggle" data-toggle="dropdown">Links<b class="caret"></b></a>
<ul class="dropdown-menu">
<li><a href="https://projects.eclipse.org/projects/iot.ditto" target="_blank">Eclipse Ditto Project</a></li>
<li><a href="https://www.eclipse.org/forums/index.php/f/364/" target="_blank">Forum</a></li>
<li><a href="https://ci.eclipse.org/ditto/" target="_blank">Jenkins</a></li>
<li><a href="https://dev.eclipse.org/mhonarc/lists/ditto-dev/" target="_blank">Mailing list archives</a></li>
<li><a href="https://gitter.im/eclipse/ditto" target="_blank">Gitter.im chat</a></li>
</ul>
</li>
<!--comment out this block if you want to hide search-->
<li>
<!--start search-->
<div id="search-demo-container">
<input type="text" id="search-input" placeholder="search...">
<ul id="results-container"></ul>
</div>
<script src="https://cdnjs.cloudflare.com/ajax/libs/simple-jekyll-search/0.0.9/jekyll-search.js" type="text/javascript"></script>
<script type="text/javascript">
SimpleJekyllSearch.init({
searchInput: document.getElementById('search-input'),
resultsContainer: document.getElementById('results-container'),
dataSource: 'search.json',
searchResultTemplate: '<li><a href="{url}" title="Integration of HTTP endpoints/webhooks">{title}</a></li>',
noResultsText: 'No results found.',
limit: 10,
fuzzy: true,
})
</script>
<!--end search-->
</li>
</ul>
</div>
</div>
<!-- /.container -->
</nav>
<!-- Page Content -->
<div class="container">
<div id="main">
<!-- Content Row -->
<div class="row">
<!-- Content Column -->
<div class="col-md-12" id="tg-sb-content">
<!-- Look the author details up from the site config. -->
<!-- Output author details if some exist. -->
<!-- Output author details if some exist. -->
<!---->
<!--<span>-->
<!--<!– Mugshot. –>-->
<!--<img src="https://www.gravatar.com/avatar/1993375e06bf8a2b236b5862792a0532?s=135" alt="A photo of Thomas Jäckle" />-->
<!--<!– Personal Info. –>-->
<!--Written by <a href="https://github.com/thjaeckle" target="_blank">Thomas Jäckle</a>-->
<!--</span>-->
<!---->
<article class="post" itemscope itemtype="http://schema.org/BlogPosting">
<header class="post-header">
<h1 class="post-title" itemprop="name headline">Integration of HTTP endpoints/webhooks</h1>
<p class="post-meta">Published by <img src="https://www.gravatar.com/avatar/1993375e06bf8a2b236b5862792a0532?s=135" alt="A photo of Thomas Jäckle" style="width:50px;border-radius:50%;display:inline-block;margin-right:5px;" /><span itemprop="author" itemscope itemtype="http://schema.org/Person"><span itemprop="name"><a href="https://github.com/thjaeckle" target="_blank">Thomas Jäckle</a> </span></span> on <time datetime="2019-10-17T00:00:00+00:00" itemprop="datePublished">Oct 17, 2019</time> - Tags:
<a href="tag_blog.html">blog</a>
</p>
</header>
<div class="post-content" itemprop="articleBody">
<p>By adding another connectivity type - <a href="connectivity-protocol-bindings-http.html">HTTP</a> - to Ditto’s
connectivity, it is now (to be released in the next Ditto milestone 1.0.0-M2) possible to
publish <em>twin events</em>, <em>messages</em>, <em>live commands and events</em> to existing HTTP servers/endpoints.</p>
<p>That is especially useful for invoking existing APIs (which are most of the time HTTP based) whenever e.g.
a digital twin was modified.</p>
<p>One example on how to benefit from this new feature is to invoke a custom
<a href="https://ifttt.com">IFTTT</a> (if-this-than-that) <a href="https://ifttt.com/maker_webhooks">webhook</a> via a HTTP <code class="language-plaintext highlighter-rouge">POST</code> request
which then may trigger other IFTTT follow-up-actions (e.g. send a chat message to a <a href="https://ifttt.com/slack">Slack</a>
room).</p>
<p>For IFTTT “webhooks” the address would be <code class="language-plaintext highlighter-rouge">POST https://maker.ifttt.com/trigger/<your-event-name>/with/key/<your-key></code>
and the expected JSON body:</p>
<div class="language-json highlighter-rouge"><div class="highlight"><pre class="highlight"><code><span class="p">{</span><span class="w">
</span><span class="nl">"value1"</span><span class="p">:</span><span class="w"> </span><span class="s2">"..."</span><span class="p">,</span><span class="w">
</span><span class="nl">"value2"</span><span class="p">:</span><span class="w"> </span><span class="s2">"..."</span><span class="p">,</span><span class="w">
</span><span class="nl">"value3"</span><span class="p">:</span><span class="w"> </span><span class="s2">"..."</span><span class="w">
</span><span class="p">}</span><span class="w">
</span></code></pre></div></div>
<p>In combination with <a href="connectivity-mapping.html">payload mapping</a>, the <code class="language-plaintext highlighter-rouge">value1</code> to <code class="language-plaintext highlighter-rouge">value3</code> fields requested by the IFTTT
API can be extracted from the <a href="protocol-specification.html">Ditto Protocol</a> and could contain the changed value.</p>
<p>In combination with <a href="basic-connections.html#target-topics-and-filtering">filters for targets</a> you can even specify to
only publish e.g. <code class="language-plaintext highlighter-rouge">twin events</code>, where the temperature of a twin exceeded a certain threshold:</p>
<div class="language-plaintext highlighter-rouge"><div class="highlight"><pre class="highlight"><code>{
"address": "POST:/trigger/<your-event-name>/with/key/<your-key>",
"topics": [
"_/_/things/twin/events?filter=gt(features/temperature/properties/value,25)"
],
...
}
</code></pre></div></div>
<p>Get creative on which HTTP APIs to trigger based on twin events. E.g. invoke a “function-as-a-service” API or invoke the
Twitter API and let your digital twin tweet whenever it detects, that it is getting too warm in your office.</p>
<figure><img class="docimage" src="images/ditto.svg" alt="Ditto" style="max-width: 500px" /></figure>
<p>–<br />
The Eclipse Ditto team</p>
</div>
</article>
<hr class="shaded"/>
<footer>
<div class="row">
<div class="col-lg-12 footer">
<div class="logo">
<a href="https://eclipse.org"><img src="images/eclipse_foundation_logo.svg" alt="Eclipse logo"/></a>
</div>
<p class="notice">
©2024 Eclipse Ditto™.
Site last generated: Nov 27, 2024 <br />
</p>
<div class="quickLinks">
<a href="https://www.eclipse.org/legal/privacy.php" target="_blank">
> Privacy Policy
</a>
<a href="https://www.eclipse.org/legal/termsofuse.php" target="_blank">
> Terms of Use
</a>
<a href="https://www.eclipse.org/legal/copyright.php" target="_blank">
> Copyright Agent
</a>
<a href="https://www.eclipse.org/legal" target="_blank">
> Legal
</a>
<a href="https://www.eclipse.org/legal/epl-2.0/" target="_blank">
> License
</a>
<a href="https://eclipse.org/security" target="_blank">
> Report a Vulnerability
</a>
</div>
</div>
</div>
</footer>
</div>
<!-- /.row -->
</div>
<!-- /.container -->
</div>
<!-- /#main -->
</div>
</body>
</html>