(401) Unauthorized Error When Calling Web API from a Console Application

Question

When I call my WEB API from my Console Application, I encounter:

The remote server returned an error: (401) Unauthorized.

This application runs in Interanet (Windows Authentication)

            Uri uri = new Uri("http://myServer/api/main/foo");
            WebClient client = new WebClient();
            client.Credentials = CredentialCache.DefaultCredentials;

            using (Stream data = client.OpenRead(uri))
            {
                using (StreamReader sr = new StreamReader(data))
                {
                    string result = sr.ReadToEnd();
                    Console.WriteLine(result);
                }
            }

Updated

If I replace

client.Credentials = CredentialCache.DefaultCredentials;

with this line

client.Credentials = new NetworkCredential( username, password);

it works fine but I need the current credential to be set automatically.

Any idea? Thanks in advance ;)

Nagaraj S · Accepted Answer · 2014-01-28 05:14:30Z

2

You use the default windows credentials here

client.Credentials = CredentialCache.DefaultCredentials;

Specify the credential that you want to authenticate using the following code:

var credential = new NetworkCredential(, , );

serverReport.ReportServerCredentials.NetworkCredentials = credential;

edited Jan 28, 2014 at 5:14

Nagaraj S

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answered Jan 28, 2014 at 5:09

Toan Nguyen

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1 Comment

Matin Habibi Over a year ago

Thanks for taking your time, Actually I am using Windows Authentication

Usman · Accepted Answer · 2014-01-28 05:10:53Z

0

following line is the cause of this behaviour :

client.Credentials = CredentialCache.DefaultCredentials;

Actually this line assigns the credentials of the logged in user or the user being impersonated ( which is only possible in web applications ) , so what I believe is that you have to provide credentials explicitly (http://msdn.microsoft.com/en-us/library/system.net.credentialcache(v=vs.110).aspx) , thanks.

answered Jan 28, 2014 at 5:10

Usman

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