/// <summary>
/// Submits an image for descriptive analysis.
/// </summary>
/// <param name="imageByteArray">The image to analyze as a byte array.</param>
/// <param name="language">The language to use in the returned description.</param>
/// <returns>An Azure ImageAnalysis object or null.</returns>
private async Task <ImageAnalysis> MakeDescriptiveAnalysisRequestToAzure(byte[] imageByteArray, string language)
{
using (var client = new HttpClient())
{
client.DefaultRequestHeaders.Add("Ocp-Apim-Subscription-Key", ConnectionDetails.SubscriptionKey);
using (var content = new ByteArrayContent(imageByteArray))
{
try
{
var uri = ConnectionDetails.GetAnalyzeUrl(language);
content.Headers.ContentType =
new MediaTypeHeaderValue("application/octet-stream");
var response = await client.PostAsync(uri, content);
response.EnsureSuccessStatusCode();
var json = await response.Content.ReadAsStringAsync();
return(JsonConvert.DeserializeObject <ImageAnalysis>(json));
}
catch (HttpRequestException ex)
{
Console.WriteLine(ex);
throw;
}
}
}
}
/// <summary>
/// Submits an image for descriptive analysis.
/// </summary>
/// <param name="imageByteArray">The image to analyze as a byte array.</param>
/// <param name="language">The language to use in the returned description.</param>
/// <returns>An Azure ImageAnalysis object or null.</returns>
private ImageAnalysis MakeDescriptiveAnalysisRequestToAzure(byte[] imageByteArray, string language)
{
ImageAnalysis output = null;
HttpWebResponse response = null;
try
{
var request = WebRequest.CreateHttp(new Uri(ConnectionDetails.GetAnalyzeUrl(language)));
request.ContentType = "application/octet-stream";
request.Headers.Add("Ocp-Apim-Subscription-Key", ConnectionDetails.SubscriptionKey);
request.Method = "POST";
request.ContentLength = imageByteArray.Length;
var requestStream = request.GetRequestStream();
requestStream.Write(imageByteArray, 0, imageByteArray.Length);
requestStream.Close();
response = (HttpWebResponse)request.GetResponse();
if (response.StatusCode != HttpStatusCode.OK)
{
throw new HttpRequestException("did not return success");
}
// ReSharper disable once AssignNullToNotNullAttribute
var reader = new StreamReader(response.GetResponseStream());
output = JsonConvert.DeserializeObject <ImageAnalysis>(reader.ReadToEnd());
}
catch (HttpRequestException ex)
{
Console.WriteLine(ex);
throw;
}
finally
{
response?.Close();
}
return(output);
}