Microsoft Face Detect API code example Bad Request - azure

Question

I have been trying to solve this bad request error. I am able to make the request call and Azure reports total calls correctly and also reports total errors.
I can not get this code example to work; however if I send this via their online console all is fine:
static async void MakeRequest()
{
string key1 = "YourKey"; // azure the one should work
string data = "https://pbs.twimg.com/profile_images/476054279438868480/vvv5YG0Q.jpeg";
var client = new HttpClient();
var queryString = HttpUtility.ParseQueryString(string.Empty);
// Request parameters
queryString["returnFaceId"] = "true";
// Request headers
client.DefaultRequestHeaders.Add("Ocp-Apim-Subscription-Key", key1);
Console.Beep();
var uri = "https://westus.api.cognitive.microsoft.com/face/v1.0/detect?" + queryString;
//string statusURL = HttpContext.Current.Request.Url.Host;
//console.WriteLine("Your Status URL address is :" + statusURL);
HttpResponseMessage response;
// Request body
// byte[] byteData = Encoding.UTF8.GetBytes("{url: https://pbs.twimg.com/profile_images/476054279438868480/vvv5YG0Q.jpeg}");
byte[] byteData = Encoding.UTF8.
GetBytes("{"+ "url"+":"+"https://pbs.twimg.com/profile_images/476054279438868480/vvv5YG0Q.jpeg" + "}");
using (var content = new ByteArrayContent(byteData))
{
content.Headers.ContentType =
new MediaTypeHeaderValue("application/json");
response = await client.PostAsync(uri, content);
}
HttpRequestMessage request =
new HttpRequestMessage(HttpMethod.Post, uri);
request.Content = new StringContent("{body}",
Encoding.UTF8,
"application/json");
//CONTENT-TYPE header
await client.SendAsync(request)
.ContinueWith(responseTask =>
{
Console.WriteLine("Response: {0}", responseTask.Result);
Console.WriteLine("-----------------------------------");
Console.ForegroundColor = ConsoleColor.Blue;
Console.WriteLine("End of Post return from MS");
Console.WriteLine("Hit ENTER to exit...");
Console.ReadKey();
});
}// end of Make request

Answer 1

Your JSON is malformed. Your fields and non-scalar fields must be quoted. You also have some unnecessary code. Here's code that works:
static async void MakeRequest()
{
string key1 = "YourKey"; // azure the one should work
string imageUri = "https://pbs.twimg.com/profile_images/476054279438868480/vvv5YG0Q.jpeg";
var client = new HttpClient();
var queryString = HttpUtility.ParseQueryString(string.Empty);
// Request parameters
queryString["returnFaceId"] = "true";
// Request headers
client.DefaultRequestHeaders.Add("Ocp-Apim-Subscription-Key", key1);
var uri = "https://westus.api.cognitive.microsoft.com/face/v1.0/detect?" + queryString;
string body = "{\"url\":\"" + imageUri + "\"}";
using (var content = new StringContent(body, Encoding.UTF8, "application/json"))
{
await client.PostAsync(uri, content)
.ContinueWith(async responseTask =>
{
var responseBody = await responseTask.Result.Content.ReadAsStringAsync();
Console.WriteLine("Response: {0}", responseBody);
Console.WriteLine("-----------------------------------");
Console.ForegroundColor = ConsoleColor.Blue;
Console.WriteLine("End of Post return from MS");
Console.WriteLine("Hit ENTER to exit...");
Console.ReadKey();
});
}
}// end of Make request
If you're using Visual Studio, I would recommend the NuGet package as this will handle much of the mundane details for you, including C# types for responses.