Develop Reference

'invalid_grant' error on API call with RestSharp

I need to convert that curl request to c#. Im using RestSharp. curl request:
> curl -X POST -i https://gw.api.alphabank.eu/sandbox/auth/token \
-u "{{client_id}}:{{client_secret}}" \
-d "grant_type=client_credentials&scope=account-info-setup"
I tried the following code but I end up with 'invalid_grant' error as a response.
Any ideas what i'm doing wrong?
My code:
var client = new RestClient(url);
var request = new RestRequest();
request.Method = Method.POST;
client.Authenticator = new HttpBasicAuthenticator(ABclientID, ABclientSecret);
request.AddParameter("grant_type", "client_credentials");
request.AddParameter("scope", "account-info-setup");
request.OnBeforeDeserialization = resp => { resp.ContentType = "application/x-www-form-urlencoded"; };
IRestResponse response = client.Execute(request);

this sample code is generated by Postman and it's working for my api which accepts application/x-www-form-urlencoded, can you add your parameters like this? Or create and make your request works on Postman and generate to C#-RestSharp it's usually works for me with minor changes.
var client = new RestClient("url");
var request = new RestRequest(Method.POST);
request.AddHeader("Content-Type", "application/x-www-form-urlencoded");
request.AddParameter("userId", "1234");
request.AddParameter("count", "5");
IRestResponse response = client.Execute(request);
Console.WriteLine(response.Content);

Turns out "invalid_grant" meant wrong credentials. I was giving wrong client-secret.
Request was succesfull after correcting the client_secret.

How to convert curl "--user" command to Restsharp?

My curl is
curl -X POST -d "email=jeff#example.com" -d "password=*******"
--user admin#example.com:password https://example.com/admin/web/users/add
what I have so far is
var client = new RestClient("https://example/admin/web/users/add");
var request = new RestRequest(Method.POST);
request.AddHeader("content-type", "application/x-www-form-urlencoded");
request.AddHeader("accept", "application/json");
request.AddParameter("application/x-www-form-urlencoded", "email=jeff#example.com" + "password=********", ParameterType.RequestBody);
IRestResponse response = client.Execute(request);
Console.WriteLine(response.Content);
what i dont understand is where do I put
--user admin#example.com:password

Unless specified otherwise, curl uses HTTP Basic authentication when making HTTP(S) requests.
In RestSharp, HTTP Basic auth is provided via the RestSharp.Authenticators.HttpBasicAuthenticator type:
var client = new RestClient("https://example/admin/web/users/add");
client.Authenticator = new HttpBasicAuthenticator("admin#example.com", "password");
...

Retaining authorization header in RestSharp during redirects

I am using RestSharp to make a GET api call. The api call is authenticated through HTTP Basic authentication by passing the authorization header.
The server redirects the api call with a status code 307. My client code does handle the redirects but the authorization header is not passed to this redirected api call. This is done for valid reasons as mentioned here. Hence I do get an unauthorized error.
How can I configure the RestClient to restore the authorization header?
var client = new RestClient("https://serverurl.com");
var request = new RestRequest(Method.GET);
request.AddHeader("Authorization", "Basic Z3JvdXAxOlByb2otMzI1");
request.AddHeader("Content-Type", "application/json");
request.AddHeader("Tenant-Id", "4892");
IRestResponse response = client.Execute(request);
Console.WriteLine(response.Content);

I added a check that resends the api request of receiving a 401 with the below code.
var client = new RestClient("https://serverurl.com");
var request = new RestRequest(Method.GET);
request.AddHeader("Authorization", "Basic Z3JvdXAxOlByb2otMzI1");
request.AddHeader("Content-Type", "application/json");
request.AddHeader("Tenant-Id", "4892");
IRestResponse response = client.Execute(request);
//Resend the request if we get 401
int numericStatusCode = (int)response.StatusCode;
if(numericStatusCode == 401) {
var redirectedClient = new RestClient(response.ResponseUri.ToString());
IRestResponse newResponse = redirectedClient.Execute(request);
Console.WriteLine(newResponse.ResponseStatus);
}

Posting form submissions with the KOBO REST API

I'm having a little trouble posting form submissions from C# to a KOBO Server (https://kf.kobotoolbox.org). The response I get is 'Bad Gateway'.
Here's my code:
var client = new RestClient("https://kc.kobotoolbox.org/api/v1/submissions");
//var client = new RestClient("https://kc.kobotoolbox.org/api/v1/forms/{pk}/labels");
client.Authenticator = new HttpBasicAuthenticator("a_user", "alpha9876");
//client.AddDefaultUrlSegment("pk", "31037");
//client.AddDefaultUrlSegment("tags", "tag1, tag2");
// client.AddDefaultUrlSegment("format", "xls");
//client.AddDefaultUrlSegment("url", "https://kc.kobotoolbox.org/api/v1/projects/1");
//client.AddDefaultUrlSegment("owner", "https://kc.kobotoolbox.org/api/v1/users/ona");
//client.AddDefaultUrlSegment("name", "project 1");
//client.AddDefaultUrlSegment("date_created", "2013-07-24T13:37:39Z");
//client.AddDefaultUrlSegment("date_modified", "2013-07-24T13:37:39Z");
var request = new RestRequest(Method.POST);
IRestResponse response = client.Execute(request);
request.AddHeader("header", "xml");
request.Resource = "C:\\Users\\Susan\\Desktop\\xmltest\\form_linkage_parentform.xml";
Could anyone help with a sample snippet of what the C# code for making this POST HTTP request would probably look like? Based on this: https://kc.kobotoolbox.org/api/v1/
Thank you!

I finally managed to do it using CSV files (https://kc.kobotoolbox.org/api/v1/forms) as follows:
var client = new RestClient("https://kc.kobotoolbox.org/api/v1/forms/{pk}/csv_import");
client.Authenticator = new HttpBasicAuthenticator("user_name", "password");
client.AddDefaultUrlSegment("pk", "31045");
string file_path = Server.MapPath("~/myform.csv");
var request = new RestRequest(Method.POST);
request.AddFile("csv_file", file_path);
IRestResponse response = client.Execute(request);

Cannot set MIME type using RestSharp and GoCardless

Using C#, .Net 4,5, RestSharp v4.0.3
Attempting to create an api_key in GoCardless
I create a RestClient like this:
var client = new RestClient();
client.BaseUrl = SandboxBaseUrl;
client.Authenticator = new HttpBasicAuthenticator(apiKeyId, apiKey);
client.AddDefaultHeader("GoCardless-Version", Properties.Settings.Default.GoCardlessVersion);
client.AddDefaultHeader("Accept", "application/json");
client.AddDefaultHeader("content-type", "application/json");
request.AddHeader("content-type", "application/json");
When I post to GoCardless I get the error
{"error":{"message":"'Content-Type' header must be application/json or application/vnd.api+json ......

After a lot of fruitless searching I gave up and used the solutions in older StackOverflow postings. Such as
// Create the Json for the new object
StringBuilder requestJson = new StringBuilder();
var requestObject = new { api_keys = new { name = name, links = new { role = role } } };
(new JavaScriptSerializer()).Serialize(requestObject, requestJson);
...
// Set up the RestSharp request
request.Parameters.Clear();
request.AddParameter("application/json", requestJson, ParameterType.RequestBody);
I can see why this works - and even perhaps the intention of RestSharp doing it this way.