Azure Function for Apple IAPs

run.csx

#r "Newtonsoft.Json"
#load "models.csx"
#load "AppleReceipt.cs"

using System.Net;
using Newtonsoft.Json;
using Newtonsoft.Json.Linq;

private const string AppleProductionUrl = "https://buy.itunes.apple.com/verifyReceipt";
private const string AppleTestUrl = "https://sandbox.itunes.apple.com/verifyReceipt";
private static HttpClient _client = new HttpClient();
private static JsonSerializer _serializer = new JsonSerializer();

public static async Task<HttpResponseMessage> Run(HttpRequestMessage req, TraceWriter log)
{
    var receipt = await req.Content.ReadAsAsync<AppleReceipt>();
    
    if (string.IsNullOrEmpty(receipt.Id) || string.IsNullOrEmpty(receipt.TransactionId) || receipt.Data == null)
        return req.CreateResponse(HttpStatusCode.BadRequest);
    
    log.Info($"IAP receipt: {receipt.Id}, {receipt.TransactionId}");
  
    //Code here either returns 200 OK or 400 Bad Request
}