CODEWITHSUNDEEP
oauth-2.0yahoo-api
user1998863
user1998863

Reputation: 175

Oauth2 Yahoo Gemini API

I am having trouble calling Yahoo Gemini API to access Yahoo Gemini Advertising from my C# console (desktop) application.

Here are steps I used:

  1. Create an installed application on https://developer.yahoo.com/apps/create/. This gave me both {Client ID} and {Client Secret}.
  2. https://api.login.yahoo.com/oauth2/request_auth?client_id={Client ID} &redirect_uri=oob&response_type=code&language=en-us. This will take me to the yahoo login screen where I sign in. Press the Agree button and the next screen shows the seven-letter authorization code (say nzbcns9). I write down this authorization code.

  3. Then I use the following code to try to get the access token:

    class Program
{
static void Main(string[] args)
{
    string clientId = {Client ID};
    string secret = {Client Secret};

    var request = WebRequest.Create(@"https://api.login.yahoo.com/oauth2/get_token");
    request.Method = "POST";

    SetBasicAuthHeader(request, clientId, secret);

    string postData = "grant_type=authorization_code&redirect_uri=oob&code=nzbcns9";
    ASCIIEncoding encoding = new ASCIIEncoding();
    byte[] byte1 = encoding.GetBytes(postData);
    request.ContentLength = byte1.Length;
    Stream dataStream = request.GetRequestStream();
    dataStream.Write(byte1, 0, byte1.Length);
    dataStream.Close();

    request.ContentType = "application/x-www-form-urlencoded";
    var response = request.GetResponse();
    Console.WriteLine(((HttpWebResponse)response).StatusDescription);
}

static void SetBasicAuthHeader(WebRequest request, String userName, String userPassword)
{
    string authInfo = userName + ":" + userPassword;
    authInfo = Convert.ToBase64String(Encoding.Default.GetBytes(authInfo));
    request.Headers["Authorization"] = "Basic " + authInfo;
}
}

Then I get

Unhandled Exception: System.Net.WebException: The remote server returned an error: (401) Unauthorized. at System.Net.HttpWebRequest.GetResponse().

What did I do wrong?

I also try to post the same message using Fiddler, I get

{"error":"invalid_request"}

Upvotes: 3

Views: 1554

Answers (2)

Foozinator
Foozinator

Reputation: 400

Neither of these worked for me, but it did work once I changed the SetBasicAuthHeader to use ISO-8859-1 encoding:

    static void SetBasicAuthHeader( WebRequest request, String userName, String userPassword )
    {
        string authInfo = userName + ":" + userPassword;
        authInfo = Convert.ToBase64String( Encoding.GetEncoding( "ISO-8859-1" ).GetBytes( authInfo ) );
        request.Headers[ "Authorization" ] = "Basic " + authInfo;
    }

Upvotes: 0

user1623663
user1623663

Reputation: 36

I tried your code and what worked for me was to put the line request.ContentType = "application/x-www-form-urlencoded"; BEFORE Stream dataStream = request.GetRequestStream();

So this worked:

    string postData = "grant_type=authorization_code&redirect_uri=oob&code=nzbcns9";
    ASCIIEncoding encoding = new ASCIIEncoding();
    byte[] byte1 = encoding.GetBytes(postData);
    request.ContentLength = byte1.Length;
    request.ContentType = "application/x-www-form-urlencoded";
    Stream dataStream = request.GetRequestStream();
    dataStream.Write(byte1, 0, byte1.Length);
    dataStream.Close();

Upvotes: 1

Related Questions