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

Question

0.00/5 (No votes)

See more:

I'm trying to pass data to a web API and retrieve results via json. I keep getting the f.f. error: The remote server returned an error: (401) Unauthorized.

Here is the code.

What I have tried:

C#

string authInfo = "XXXXXXX" + ":" + "XXXXXXX";
authInfo = Convert.ToBase64String(Encoding.Default.GetBytes(authInfo));

HttpWebRequest request =(HttpWebRequest)WebRequest.Create(@"https://elig.nhia.gov.gh:5007/api/hp/authenticate/app");
               
request.Method = "POST";
request.Accept = "application/json; charset=utf-8";                request.Headers["Authorization"] = "Basic " + authInfo;

using (var streamWriter = new StreamWriter(request.GetRequestStream()))
{
     string json = new JavaScriptSerializer().Serialize(new
     {
          GhanaCardNo = "",
          UMN = membershipNoTextBox.Text
     });
                    
     streamWriter.Write(json);
     streamWriter.Flush();
     streamWriter.Close();
}

var response = (HttpWebResponse)request.GetResponse();

string strResponse = "";
using (var sr = new StreamReader(response.GetResponseStream()))
{
     strResponse = sr.ReadToEnd();
}

Posted 25-Feb-19 0:42am

Kwabena Sackey

Updated 25-Feb-19 1:21am

TheRealSteveJudge

v3

Add a Solution

1 solution

Add a Solution

Add your solution here

Treat my content as plain text, not as HTML

Preview 0

…

Existing Members

Sign in to your account

...or Join us

Download, Vote, Comment, Publish.

Your Email
Password
Forgot your password?

Your Email
This email is in use. Do you need your password?
Optional Password

I have read and agree to the Terms of Service and Privacy Policy
Please subscribe me to the CodeProject newsletters

When answering a question please:

Read the question carefully.
Understand that English isn't everyone's first language so be lenient of bad spelling and grammar.
If a question is poorly phrased then either ask for clarification, ignore it, or edit the question and fix the problem. Insults are not welcome.
Don't tell someone to read the manual. Chances are they have and don't get it. Provide an answer or move on to the next question.

Let's work to help developers, not make them feel stupid.

This content, along with any associated source code and files, is licensed under The Code Project Open License (CPOL)

TheRealSteveJudge · Answer 1 · 2019-02-25T01:22:00

Solution 1

1) Please never ever publish your logon credentials.
2) When testing the API with Postman you will see an error message in the response body:

A valid API Key must be provided via x-nhia-apikey request header parameter.

You therefore also must supply a valid API key which nobody here knows.
You should contact the web site owner in order to get the needed information.

Posted 25-Feb-19 1:22am

TheRealSteveJudge

Comments

Kwabena Sackey 25-Feb-19 10:01am

Thanks they're test credentials but I get the point. I revised the code to read:

HttpWebRequest request = (HttpWebRequest)WebRequest.Create(@"https://elig.nhia.gov.gh:5007/api/hp/authenticate/app");
request.Method = "POST";
request.Accept = "application/json; charset=utf-8";

request.Headers.Add("x-nhia-apikey", "xxxxx");
request.Headers.Add("x-nhia-apisecret", "xxxxx");

using (var streamWriter = new StreamWriter(request.GetRequestStream()))
{
string json = new JavaScriptSerializer().Serialize(new
{
GhanaCardNo = "",
UMN = membershipNoTextBox.Text
});
streamWriter.Write(json);
streamWriter.Flush();
streamWriter.Close();
}

var response = (HttpWebResponse)request.GetResponse();

string strResponse = "";
using (var sr = new StreamReader(response.GetResponseStream()))
{
strResponse = sr.ReadToEnd();

}

but I still get 401 unauthorized.

TheRealSteveJudge 25-Feb-19 10:15am

I am sorry, I ran out of ideas. Maybe you should ask the guys who provided the Web API.