Develop Reference

Getting 400 bad request message while requesting for access token from DocuSign API

I am able generate access token with docusign site by using link https://developers.docusign.com/oauth-token-generator
But when try to get access token in our system using c# code then getting message (The remote server returned an error: (400) Bad Request.)
I follow the authenticate process mentioned in below link.
https://developers.docusign.com/esign-rest-api/guides/authentication/oauth2-code-grant
I able to get authentication code. I used this authentication code to hit API (https://account-d.docusign.com/oauth/token).
Below is my code sample
string integrationKey = "key removed";
string secretKey = "key removed";
var httpWebRequest = (HttpWebRequest)WebRequest.Create("https://account-d.docusign.com/oauth/token");
httpWebRequest.ContentType = "application/x-www-form-urlencoded";
httpWebRequest.Method = "POST";
string apiStoreConsumer = "removed";
httpWebRequest.Headers.Add("Authorization", "Basic " + apiStoreConsumer);
using (var streamWriter = new StreamWriter(httpWebRequest.GetRequestStream()))
{
string input = "authorization_code&authorization_code= <authentication code goes here>;
streamWriter.Write(input);
streamWriter.Flush();
streamWriter.Close();
}
WebResponse response = (HttpWebResponse)httpWebRequest.GetResponse();
Query:
Why am I getting 400 error?
Do we have any expiry time for access token, if yes then how long?
Does authentication code get change for every request?
Please help me on this.
Thank You!

I recommend you use a library for OAuth in .NET/C#.
If you want to see how this is done, please clone this repo.
The issue is that you need to first get a code and then exchange it for a token. There are 2 steps involved if you do this manually.
The first step requires you to authenticate the user in a browser before you can call any API.
During that step you need to pass in your integration key and redirect back to your URL.
Once redirected back you'll receive a code that can be exchanged for an access token using the API call you had talks about.

Using one legged OAuth1 in C#, gets error: (401) Unauthorized

I am using an one legged OAuth1 web service! which means I don't need to get a token to get my result just consumer key and secret is enough.I have used many different APIs and got the same result every time,I don't get what I'm doing wrong!
here is the latest API I've used:
https://github.com/rhargreaves/oauth-dotnetcore
the OAuth classes are pretty much straight forward,I've used those and made my request this way:
OAuthRequest client = OAuthRequest.ForRequestToken("key", "secret");
client.RequestUrl = "http://some site/?q=api/sbu_rest/user_books_returned/username";
// For HTTP header authorization
string auth = client.GetAuthorizationHeader();
HttpWebRequest request = (HttpWebRequest)WebRequest.Create(client.RequestUrl);
request.Headers.Add("Authorization", auth);
HttpWebResponse response = (HttpWebResponse)request.GetResponse();
but I get the error:
The remote server returned an error: (401) Unauthorized.
It's worth to mention that I have checked my URL ,key and secret in postman and they work fine(I'll get the result I want which is a list of books!)
PS: the signature method is HMAC-SHA1

Trello API OAuth can't find my app

I'm using Trello's Developer API's implementation of OAuth to post stuff to a list.
I've successfully made a request and got my oauth_token and oauth_token_secret back from https://trello.com/1/OAuthGetRequestToken
But when I call https://trello.com/1/OAuthAuthorizeToken, passing the oauth_token that I've just received, I get a response of 'App not found'.
Can anyone help?
EDIT: Here's what I'm getting back from https://trello.com/1/OAuthGetRequestToken
oauth_token=8d0e43fd0cc67726567d49ae5e818852&oauth_token_secret=[secret]
And here's the Authorization header I'm sending (escaped in C#)
"OAuth oauth_version=\"1.0\", oauth_signature_method=\"HMAC-SHA1\", oauth_nonce=\"8335006\", oauth_timestamp=\"1414663625\", oauth_consumer_key=\"9612eaca23c7bdd3eca60dc8c2a8159c\", oauth_signature=\"M6sLyyfHGYXOtQnLJexDx96kbFo=\", oauth_token=\"8d0e43fd0cc67726567d49ae5e818852\""
Am I doing something wrong or is this an error on Trello's end?
EDIT: I'm using RestSharp to call the Trello API, as below:
var client = new RestSharp.RestClient("https://trello.com/");
var request = new RestSharp.RestRequest("1/OAuthAuthorizeToken", Method.GET);
EDIT: Here's the complete RestSharp code:
var client = new RestSharp.RestClient("https://trello.com/");
var request = new RestSharp.RestRequest("1/OAuthAuthorizeToken", Method.GET);
Uri uri = new Uri(string.Format("{0}/{1}", client.BaseUrl, request.Resource));
string authHeader = GenerateAuthorizationHeader(uri);
//This is the output of GenerateAuthorizationHeader()
//string authHeader = "OAuth oauth_version=\"1.0\", oauth_signature_method=\"HMAC-SHA1\", oauth_nonce=\"8335006\", oauth_timestamp=\"1414663625\", oauth_consumer_key=\"9612eaca23c7bdd3eca60dc8c2a8159c\", oauth_signature=\"M6sLyyfHGYXOtQnLJexDx96kbFo=\", oauth_token=\"8d0e43fd0cc67726567d49ae5e818852\"";
request.AddHeader("Authorization", authHeader);
The GenerateAuthorizationHeader method uses OAuth.OAuthBase to generate the TimeStamp and Signature for the OAuth request.

Looks like it might be a trello problem...
this user, had the wrong key by the sounds of things.
are you 100% sure that the key is correct.
Getting "App not found" from Trello Authentication

I had the same problem, the thing here is that OAuth is version 1.0
When you get the token and token secret from the first call you have to make your user to visit https://trello.com/1/OAuthAuthorizeToken not you.
In your case you have to redirect your user to https://trello.com/1/OAuthAuthorizeToken?oauth_token=8d0e43fd0cc67726567d49ae5e818852&scope=read,write,account
He will get a page where he can Allow the access. Then you will get a verification code in the page after the authorization to continue with your process (GetAccessToken).
You can try this as a test, in a real application you have to specify a callback url and an application name in the OAuthAuthorizeToken call.

How to call Google API from .NET/C# Web Application

I am struggling to call APIs hosted in Google Cloud https://apis-explorer.appspot.com/apis-explorer/?base=https%3A%2F%2Finnovative-glass.appspot.com%2F_ah%2Fapi#p/mirror/v1/
Up to my understanding, APIs are exposed as REST service. I need to make rest service call from .net application.
I have done OAuth Authentication. I am passing access_token as per the guidance given https://developers.google.com/accounts/docs/OAuth2WebServer
My Code:
UriBuilder uriBuilder = new UriBuilder("https://innovative-glass.appspot.com/_ah/api/mirror/v1/timeline");
string userId = Session["userId"] as string;
var state = Utils.GetStoredCredentials(userId);
NameValueCollection queryParameters = HttpUtility.ParseQueryString(uriBuilder.Query);
queryParameters.Set("access_token", state.AccessToken);
uriBuilder.Query = queryParameters.ToString();
var request = (HttpWebRequest)WebRequest.Create(uriBuilder.ToString());
request.Method = "GET";
var response = (HttpWebResponse)request.GetResponse();
I am getting UnAuthorized exception.
Is my understanding is right? Am I doing right way?

It seems that cloud endpoints don't use the Google API default of accepting access_token as query parameter. According to the Discovery document the equivalent query parameter is oauth_token so it should work with:
queryParameters.Set("oauth_token", state.AccessToken);
Alternatively (which in my opinion is the better solution) you can also set the Authorization header of the request instead of adding the token as query parameter:
request.Headers.Add("Authorization", "Bearer " + state.AccessToken);

Where are you getting the AccessToken from, and are you sure it is still a valid token? Remember that access tokens expire about an hour after being generated, although can be revoked earlier.
Clicking on the sign-in button at innovative-glass.appspot.com gives me an origin mismatch error, so it looks like you may also have a configuration issue.
Have you been able to get it to work using just the API Explorer?

HttpClient PostAsync to Blogger API

I am using the following API to allow me to interact with Google Blogger. I need to insert a post into the users blog. However I am having trouble with my PostAsync functionality. I get a 401 telling me that my request isn't authorized despite having an API Key, however I think I may not be properly inserting my OAuth token.
I have the following code,
This is the code where I set up my authorization header, (note the key there is fake but is the same form as what i think is the OAuth token)
httpClient.DefaultRequestHeaders.Authorization = new AuthenticationHeaderValue("ya29.AHES6ZTBZi1dWPVdlcF7qAD-nSM6XxwY2323232m4lXW");
And this is my PostAsync function
HttpResponseMessage response = await req.PostAsync(URLs.postBlogURL + blogID + URLs.postBlogURLPost, new StringContent(json));
Can anyone tell me where I am going wrong? Cheers.
[UPDATE]
I amen't sure whether the authorization has to include the string bearer in it.
httpClient.DefaultRequestHeaders.Authorization = new AuthenticationHeaderValue("Bearer ya29.AHES6ZTBZi1dWPVdlcF7qAD-nSM6XxwY2323232m4lXW");

This is how I was able to get the proper OAuth auth header set for my request:
httpClient.DefaultRequestHeaders.Authorization = new AuthenticationHeaderValue( "Bearer", _accessTokenWrapper.Token.access_token );
The first parameter to the constructor is the scheme to use for the Authorization header. So in the request, the header reads:
Authorization: Bearer {the access token string}