Redirect function

function.cs

public static HttpResponseMessage Run(HttpRequestMessage req, CloudTable inputTable,
  string shortUrl, TraceWriter log)
{
    var redirectUrl = FALLBACK_URL;
    if (!String.IsNullOrWhiteSpace(shortUrl))
    {
        shortUrl = shortUrl.Trim().ToLower();
        var partitionKey = $"{shortUrl.First()}";
        TableOperation operation = TableOperation.Retrieve<ShortUrl>(partitionKey, shortUrl);
        TableResult result = inputTable.Execute(operation);
        ShortUrl fullUrl = result.Result as ShortUrl;
        if (fullUrl != null)
        {
            redirectUrl = WebUtility.UrlDecode(fullUrl.Url);
        }
    }    
    var res = req.CreateResponse(HttpStatusCode.Redirect);
    res.Headers.Add("Location", redirectUrl);
    return res;
}