Use Azure Function and API Management Authorizations to create your own service connector

In local.settings.json file, we will add the following code:

{
    "IsEncrypted": false,
  "Values": {
    "AzureWebJobsStorage": "UseDevelopmentStorage=true",
    "FUNCTIONS_WORKER_RUNTIME": "dotnet",
    "CUSTOM_URL": "YOUR_CUSTOM_URL",
    "SUBSCRIPTION_KEY": "YOUR_SUBCRIPTION_KEY",
    "TEAMS_URL": "YOUR_TEAMS_URL"
  }
}

In our FunctionAppAPIMAuthTest.cs file, we will add the following code:

using System;
using System.Net.Http;
using System.Net.Http.Formatting;
using System.Threading.Tasks;
using Microsoft.Azure.WebJobs;
using Microsoft.Extensions.Logging;
using Newtonsoft.Json.Linq;

namespace FunctionAppAPIMAuthTest
{
    public class Function1
    {
        private static HttpClient httpClient = new HttpClient();

        [FunctionName("Function1")]
        public async Task Run([TimerTrigger("*/1 * * * *")] TimerInfo myTimer, ILogger log)
        {
            log.LogInformation($"Timer trigger function started at: {DateTime.Now}");

            //Define header
            var subscriptionKey = System.Environment.GetEnvironmentVariable("SUBSCRIPTION_KEY", EnvironmentVariableTarget.Process);
            httpClient.DefaultRequestHeaders.Accept.Clear();
            httpClient.DefaultRequestHeaders.Add("Ocp-Apim-Subscription-Key", subscriptionKey);

            //Define GET URL for GET issue count
            var baseurl = System.Environment.GetEnvironmentVariable("CUSTOM_URL", EnvironmentVariableTarget.Process);
            var addurl = "?state=open";
            var _baseurl = baseurl + addurl;
            log.LogInformation($"URL: {_baseurl}");

            //GET call
            HttpRequestMessage request = new HttpRequestMessage(HttpMethod.Get, _baseurl);
            var response = await httpClient.SendAsync(request);
            JArray arr = JArray.Parse(await response.Content.ReadAsStringAsync());

            //Error handling
            log.LogInformation($"You currently have {arr.Count} issues open.");
            if (!response.IsSuccessStatusCode)
            {
                throw new Exception($"Call unsuccessful: {response.IsSuccessStatusCode}");
            };

            //Define POST URL to POST TeamsBody to Teams
            var teamsurl = System.Environment.GetEnvironmentVariable("TEAMS_URL", EnvironmentVariableTarget.Process);
            log.LogInformation($"URL: {teamsurl}");

            // Create TeamsBody
            var TeamsBody = new
            { 
                body = new
                {
                    content = $"You currently have {arr.Count} issues open."
                }
            };
            log.LogInformation($"Body: {TeamsBody.body.content}");

            //Define POST header
            httpClient.DefaultRequestHeaders.Accept.Clear();
            httpClient.DefaultRequestHeaders.Add("Ocp-Apim-Subscription-Key", subscriptionKey);

            //POST call with TeamsBody content
            HttpRequestMessage requestteams = new HttpRequestMessage(HttpMethod.Post, teamsurl);
            requestteams.Content = new ObjectContent<object>(TeamsBody, new JsonMediaTypeFormatter());
            var responseteams = await httpClient.SendAsync(requestteams);
            log.LogInformation($"Response: {responseteams.IsSuccessStatusCode}");

            //Error handeling
            if (!responseteams.IsSuccessStatusCode)
            {
                throw new Exception($"Call unsuccessful: {responseteams.IsSuccessStatusCode}");
            };
        }
    }
}

Note: Function1 referring to your function class file.

STEP 5 - Test Azure Function locally

Now, we can test our Azure Function locally. Hit F5 or PLAY button and Run the function locally. You should see a message within your Microsoft Teams channel similar like this:

 

Let us know what you think! @Julia Kasper and @Thiago Almeida

 

Further Resources

• What are API authorizations? 
• Authorizations – How to AAD 
• Authorizations – How to GitHub 
• Configure providers 
• Configure multiple authorization connections
• GitHub: AuthorizationsDemoAzureFunction