I am trying to implement OAuth 2.0 to enable the creation of threads via
the Disqus API. However, I can't seem to get this working. I keep receiving
a 400 response specifying
{"error_description": "Missing required parameter: grant_type", "error":
"invalid_request"}.

Here is an example of the request:

POST
/api/oauth/2.0/access_token/?client_id=...&client_secret=...&grant_type=aut horization_code&redirect_url=...&code=... HTTP/1.1

Can anyone please help determine what I'm doing wrong? I've lost most of my
day to trying to uncover the mysteries of this error. For what I can tell,
I'm doing what the API doucmentation has explained.

Thanks,
Vinney

I've the same problem in C# (Windows 8) with this code:

HttpClient client = new HttpClient();

string str =
"https://disqus.com/api/oauth/2.0/access_token/?grant_type=password&cl...";

client.DefaultRequestHeaders.Authorization =
System.Net.Http.Headers.AuthenticationHeaderValue.Parse("Basic ...");

HttpResponseMessage res = await client.PostAsync(str, null);

return await res.Content.ReadAsStringAsync();

@Marcor,

According to this thread (
https://groups.google.com/forum/?fromgroups#!topic/disqus-dev/S6SavcJ...)
you need to post the values via the request body rather than the
querystring. That said, I've still not been able to get that working
either; instead I get a new error about an invalid API version. I wont be
back on that until tonight but I'll let you know if/when I figure it out.
Hopefully you'll let me know if you beat me to the punch.

BTW, it's nice to see another .NET dev in this anti-.net world! Sexy
async/await too!

Vinney

Thanks :)

this is the solution:

HttpClient client = new HttpClient();

client.DefaultRequestHeaders.Authorization =
System.Net.Http.Headers.AuthenticationHeaderValue.Parse("Basic " + base64);

var postData = new List<KeyValuePair<string, string>>();
postData.Add(new KeyValuePair<string, string>("grant_type", "password"));
postData.Add(new KeyValuePair<string, string>("client_secret",
App.SECRETKEY));
postData.Add(new KeyValuePair<string, string>("client_id", App.APIKEY));
postData.Add(new KeyValuePair<string, string>("scope", "read,write"));
HttpContent content = new FormUrlEncodedContent(postData);

HttpResponseMessage res = await client.PostAsync("
https://disqus.com/api/oauth/2.0/access_token/", content);

Il giorno lunedì 2 luglio 2012 17:41:51 UTC+2, Vinney K ha scritto: