Develop Reference

How to troubleshoot 502 Bad Gateway error

I have
curl --include --request POST --header "Content-Type: application/x-www-form-urlencoded" --data-binary "username=xx#xxtemple.net&password=XXXXXXXX" 'https://api.xxsuccess.com/v1/auth'
running without ANY errors and go what I want.
When I run the following C# code on the SAME machine, I got 502 Bad Gateway Error:
string requestUri = "https://api.xxsuccess.com";
var client = new RestClient(requestUri);
client.Authenticator = new RestSharp.Authenticators.HttpBasicAuthenticator("xx#xxtemple.net", "XXXXX");
var request = new RestRequest("v1/auth", Method.POST);
IRestResponse restResponse = client.Execute(request);
Any idea how troubleshoot the problem ?
Why "Curl" is working and the code is not.

--data-binary does POST the data (in this case your username and password) in the request body. HttpBasic Authentication puts your authentication info into the Authorization header. So these are different requests.
If the first request is working, you need to put the data in the body also for the RestSharp request
var client = new RestClient(requestUri);
var request = new RestRequest("v1/auth", Method.POST);
request.AddHeader("content-type", "application/x-www-form-urlencoded");
request.AddParameter("username","yourusername", ParameterType.GetOrPost);
request.AddParameter("password","yourpassword", ParameterType.GetOrPost);

Getting StatusCode: UnsupportedMediaType when using RestClient with bearer token

Getting StatusCode: UnsupportedMediaType for file upload. I am using RestClient with bearer token
I got the bearer token successfully, but when sending the JSON to the API I'm getting the exception unsupported media type
var client = new RestClient(requestAPIURL);
var request = new RestRequest(Method.POST);
request.AddHeader("Content-Type", "application/json");
request.AddHeader("Authorization", string.Format("Bearer " +
token.AccessToken));
request.AddParameter("application/json",
JsonConvert.SerializeObject(jsonData), ParameterType.RequestBody);
var response = client.Execute(request);

POST the JSON in the request body:
request.AddBody(JsonConvert.SerializeObject(jsonData));

how can I get a correct response from a rest API?

I want to send a request to a rest API and get response and show it on the form. the API documentation says that I should use my token in bearer to Authorization in the header.
I've used RestSharp nugget and this my written code:
var client = new RestClient("https://api.payping.ir");
var request = new RestRequest("v1/product/List");
request.AddHeader("Authorization", "Bearer <myToken>");
request.AddParameter("offset", 0);
request.AddParameter("limit", 10);
var response = client.Execute(request, Method.GET);
richTextBox2.Text = "Status:\n" + response.StatusCode + "\nContent:\n" + response.Content + "\nResponse:\n" + response.IsSuccessful;
but I receive an incorrect response. my final string that returns on my form by this code is:
Status:
0
Content:
Response:
False
what is my mistake? and how can I get a correct response from a rest API?
thank you for your attention

Try :
request.AddParameter("Authorization", $"Bearer {myToken}", ParameterType.HttpHeader);
Then inspect your sent packet using Fiddler to verify header is sent.
Next step is server-side then ;)

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);
}

oAuth uStream API

I'm trying to get data from uStream using their API and oAuth. I can get the auth token and that token does work in Rest API Client and I can get data. I however cannot get data in my project... I keep getting 401 unauth..
Code:
protected void Page_Load(object sender, EventArgs e)
{
var client = new RestClient("https://www.ustream.tv/oauth2/token");
var request = new RestRequest(Method.POST);
request.AddHeader("authorization", "Basic xxxxxxxxxxxxxxxxxx");
request.AddHeader("content-type", "application/x-www-form-urlencoded");
request.AddParameter("application/x-www-form-urlencoded", "client_secret=xxxxxxxxxxxxx&client_id=xxxxxxxxxxxx&grant_type=client_credentials&=", ParameterType.RequestBody);
IRestResponse response = client.Execute(request);
IRestResponse<TokenObject> response2 = (IRestResponse<TokenObject>)client.Execute<TokenObject>(request);
var tknName = response2.Data.access_token;
GetData(tknName);
}
public void GetData(string token)
{
var client = new RestClient("https://api.ustream.tv/channels/206844441.json");
var request = new RestRequest(Method.GET);
request.AddHeader("authorization", "Bearer" + token);
request.AddHeader("content-type", "application/x-www-form-urlencoded");
IRestResponse jsonResponse = client.Execute(request);
IRestResponse<Channel> json2Response2 = (IRestResponse<Channel>)client.Execute<Channel>(request);
var blah = json2Response2.Content;
}
The jsonResponse comes back 401... but I can use the token in API client like Insomnia and it will work... I can get data.
Any ideas on what I'm doing wrong?
Thanks!

Assuming token is not prefixed with a single space, then this line:
request.AddHeader("authorization", "Bearer" + token);
Should instead be (added a space after Bearer):
request.AddHeader("authorization", "Bearer " + token);
Additionally, the GET request for data does not require the Content-Type header to be added to the request; although including is unlikely to cause an error.

As João mentioned, the main problem will be the missing space character between the string "Bearer" and the token itself . After you fix this i'm pretty sure it will work.
Yes, Content-Type is superfluous for GET request, but it does not harm the success of your request.
In addition, you don't need to provide client secret twice. That's enough to provide it through the Authorization header or the client_secret property in the request body.
So, that's enough to provide the secret that way:
request.AddHeader("authorization", "Basic xxxxxxxxxxxxxxxxxx");
Ant in this case you shouldn't provide the secret again in the request body, here's the modified call, based on the original code:
request.AddParameter("application/x-www-form-urlencoded", "client_id=xxxxxxxxxxxx&grant_type=client_credentials&=", ParameterType.RequestBody);

There were actually two things I had wrong. First one pointed out by #João Angelo was the missing space between the string: Bearer & token.
Second and most frustrating was that authorization needed to be Authorization... with the capital A. Now it works... .Thanks for the help.