Home Assistant as an HTTP Get Receiver

Configuration
1

hey,
i use an snom phone that is able to “call” an url when i press some buttons.
Would it be possible to use home assistant as an receiver? i would like to feed an sensor /switch wit that information.

thank u for ur help!

2

AFAIK HA requires a POST request.

What I share here is a proof of concept where a web page button starts a “post”, but there still is a “POST” request in the process.

Define an automation (adjust notify.mobile_app_sm_a125f to your notification service)):

alias: Test Webhook
description: ""
trigger:
  - platform: webhook
    webhook_id: test_webhook
condition: []
action:
  - service: notify.mobile_app_sm_a125f
    data:
      message: Test Webhook succes
mode: single

This implementation uses two implementations: the first refers to a fixed URL, the second constructs the webhook url from the user specified url which would allow you to reuse exactly the same code as long as the url changes.

<!doctype html>
<!-- File /config/www/test_webhook.html to open using http(s)://YOURINSTANCE:PORT/local/test_webhook.html -->
<html>
    <head>
        <title>Test Webhook</title>
    </head>
    <body>
        <button onclick="fetch('/api/webhook/test_webhook',{method:'post'});">
            Trigger automation "Test Webhook"
        </button><br />
        <button onclick="var w=location.href.substring(location.href.lastIndexOf('/') + 1);w=w.substring(0,w.lastIndexOf('.'));fetch('/api/webhook/' + w, {method:'post'});">
            Trigger automation "Test Webhook" (generic method)
        </button>
    </body>
</html>

The above requires that the page is used by a client that executes the JavaScript code.
You can skip the requirement for pushing a button by executing JavaScript on page load.
As far as the parameters go, you’ll also need to amend this proof of concept to adjust the request headers (Content-Type) and convert the GET parameters to a payload.

For more info, read the documentation regarding webhooks .

3

thanks for ur reply.
i was able to build an html page that runs onload:


<!doctype html>
<!-- File /config/www/test_webhook.html to open using http(s)://YOURINSTANCE:PORT/local/test_webhook.html -->
<html>
    <head>
<script type="text/javascript">
window.onload = function() {
fetch("http://ip:8123/api/webhook/webhook", { method: "POST", });
  }
</script>
        <title>Test Webhook</title>
    </head>
    <body>
        test
    </body>
</html>

so opening up that page on my webbrowser sends an message now to my mobile device.

but sadly i dont get any further then that… it seems like i need to adjust the call of the webhook so that the phone can run it

4

In 2023.5.1, webhooks can be called using GET, but wait a little bit before updating - there are quite a few issues with that first release of the month.

5

sadly snom phones doenst seem to like to call ssl pages… tried it several times but didnt worked
log show an error:

25/5/2023 11:54:57 [NOTICE] GUI: Sending post request https://domainnameofmyhomie:443/api/webhook/dndon
25/5/2023 11:54:57 [NOTICE] PHN: Fetching URL: https://domainnameofmyhomie:443/api/webhook/dndon
25/5/2023 11:54:57 [ERROR ] PHN: TPL: Socket Error: 78/21/connected, read -> Operation now in progress (150)
25/5/2023 11:54:57 [NOTICE] PHN: webclient::on_tcp_close conn_id:16
25/5/2023 11:54:57 [NOTICE] PHN: Server rejected Action URL request with 500 ><
6

That does seem to be related to SSL - I am accessing mine over SSL.

Check your home assistant log, maybe you find the reason.

Also, your request is a POST request - this thread is about GET requests.