How to make a https call

🚧 Developers
1

Is there a way to make a https post directly from a Hubitat groovy app? I found the http call in the API documentation but it isn't clear if it supports https and if so, what is required for it to work. I have a secure web server set up that I want to call from one of my apps. Right now I'm using a stupid workaround to call a local http app running on a rPi that then makes a secure https call. Is it as simple as putting "https://blahblahblah.html" in the URL field?

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2

Not clear which method you are using, but yes in general HTTPS should be supported and should be as simple as using HTTPS in your URL. But there’s a catch the site you connecting to must use a certificate signed by a trusted authority, otherwise you have to jump through hoops to ignore certificate errors (which as a security best practice I don’t recommend).

Assuming the site you are connecting to isn’t using a self-signed certificate or signed by a private/internal authority, you should be fine. The signing authority needs to be trusted by your hub, and I don’t think there’s a way to modify the trusted authorities on the hub. If you are using a self-signed certificate it’s better to switch to using a externally signed certificate. You can get one for free from https://letsencrypt.org/. These work just fine with Hubitat, as long as your DNS name used in your URL matches the certificate.

3

Like this maybe??

	def params = [
		uri: "https://hubitatpackagemanager.azurewebsites.net/graphql",
		contentType: "application/json",
		requestContentType: "application/json",
		body: [
			"operationName": null,
			"variables": [
				"searchQuery": pkgSearch
			]
		],
		ignoreSSLIssues: true
	]
	
	def result = null
	httpPost(params) { resp -> 
		result = resp.data
	}
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4

Yes you can. I do it in my GCal Search app for gets and posts. See the code starting after line 255.

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5

Thanks everybody - I tried this tonight and it works like a charm. I got rid of my stupid middle-man hack and now I'm happy with the direct update. I ended up using the "asynchttpPost" function and I'm very happy with the experience it gives the user

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6

For completeness sake, here is the function I wrote that I call and works perfectly. I modeled this after the snippet @csteele shared and the source I had for HomeBridge.

void sendHttpPost(ip, port, Map body) {
    def contentType = "application/json"
    Map params = [
        uri: "${ip}:${port}",
        requestContentType: contentType,
        contentType: contentType,
        body: body,
        ignoreSSLIssues: true,
        timeout: 20
    ]
    asynchttpPost("asyncHttpCmdResp", params, [execDt: now()])
}
void asyncHttpCmdResp(response, data) {
    def dt = now() - data.execDt
    logger("Resp: ${response} | Process time: ${dt}", "debug")
}
4 Likes