REST JSON GET - 400 Bad Request

Question

I am working with the Basecamp API which is a REST (JSON) API using basic HTTP authentication over HTTPS.

This should be a GET request but when I run my code using GET I am receiving:

Cannot send a content-body with this verb-type

When I run it as a POST, I receive:

{"status":"400","error":"Bad Request"}

Does anyone know why this may be occurring?

    using (var httpClient = new HttpClient()) {

        string userName = "someone@someone.com";
        string password = "somepassword";

        var credentials = Convert.ToBase64String(Encoding.ASCII.GetBytes(string.Format("{0}:{1}", userName, password)));

        httpClient.DefaultRequestHeaders.Authorization = new AuthenticationHeaderValue("Basic", credentials);

        HttpRequestMessage requestMessage = new HttpRequestMessage(HttpMethod.Post, "https://correctUrlHere);
        requestMessage.Headers.Add("User-Agent", "TheProject (someone@someone.com)");
        requestMessage.Content = new StringContent(string.Empty, Encoding.UTF8, "application/json");

        var response = await httpClient.SendAsync(requestMessage);

        var responseContent = await response.Content.ReadAsStringAsync();

        Console.WriteLine(responseContent);
    }

In this code I obviously swapped out the username, password, project name, and URL but in the actual code they are all correct.

Answer 1

GET requests must pass their parameters as url query and not as request body.

http://example.com?p1=1&p2=helloworld 

If you don't have any content, as your example suggests, omit setting it on the request.

The BadRequest result indicates some error with your payload (again: content seems to be empty).