How to customize Azure function url

Question

Just got started with azure functions. I am using it as an httptrigger for an IoT device.

I am trying to setup one function that will work for httptrigger requests coming from several IoT devices - So I dont have to setup one function per device. So ideally, in my c# file, I will have something like this:

DeviceClient deviceClient;
string iotHubUri = "myhub";
string deviceName = "something dynamic here that changes with device";
string deviceKey = "something dynamic here that changes with device";

Then , I'd like to get my function url to look something like this:

"https://<functionapp>.azurewebsites.net/api/<function>/{device_id}?code=xxxxx"

where device_id is the IoT device id.

I am not sure how to first setup the reference in the c# file to be dynamic and also how to get the url to look the way I intend.

Some help will be appreciated. Thanks

Answer 1

There is a route parameter is HTTP trigger exactly for this. Your trigger definition should look something like this:

"bindings": [
  {
    "type": "httpTrigger",
    "route": "something/{deviceid}",
    "name": "request",
    // possibly other parameters
  }
],

If you are using precompiled C# functions, you can do the same via attribute property, e.g.

public static IActionResult Run(
    [HttpTrigger(AuthorizationLevel.Function, "GET", Route = "something/{deviceid}")] 
    HttpRequest request,
    string deviceid)
{
    // do something based on device id
}