Trouble requesting Spotify access token [Bad Request]

Question

I am trying to a request a spotify access token using the procedure defined under 'Client Credentials Flow' on the Spotify developer page,

Here is my current implementation (Currently returns http 400 error):

using (var client = new HttpClient())
{
    var requestBody = new StringContent(
        "grant_type:client_credentials", 
        Encoding.UTF8, 
        "application/x-www-form-urlencoded");

    var requestEncrypted = Convert.ToBase64String(
        Encoding.UTF8.GetBytes(ClientId + ":" + ClientSecret));

    client.DefaultRequestHeaders.Add(
         "Authorization", 
         $"Basic {requestEncrypted}");

    var tokenResult = await client.PostAsync(TokenEndpoint, requestBody); 
}

I have tried other ways for formatting the request body including as json (Note: changing the encoding type to 'application/json' results in a http 415 error (media not supported)

What is your `TokenEndpoint` value? – Shaun Luttin Feb 28 '17 at 23:41 — Shaun Luttin, Feb 28 '17 at 23:41
@ShaunLuttin 'https://accounts.spotify.com/api/token' – Tom Gothorp Feb 28 '17 at 23:43 — Tom Gothorp, Feb 28 '17 at 23:43

score 3 · Accepted Answer · edited Oct 07 '21 at 10:53

3

For one, you need to use equals not a colon.

grant_type=client_credentials

Here is an example POST from the RFC.

POST /token HTTP/1.1
Host: server.example.com
Authorization: Basic czZCaGRSa3F0MzpnWDFmQmF0M2JW
Content-Type: application/x-www-form-urlencoded

grant_type=client_credentials

edited Oct 07 '21 at 10:53

Community

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answered Feb 28 '17 at 23:42

Shaun Luttin

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Stuck for 30 mins by a single character, Thank you! – Tom Gothorp Feb 28 '17 at 23:44

Trouble requesting Spotify access token [Bad Request]

1 Answers1