Xamarin.Forms HTTPS and Self Signed Certificate Issue

Question

I am using Xamarin.Forms and my priority is UWP. I am trying to make a post request via System.Net.Http.HttpClient and my code looks like this

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Answer 1

A workaround for using self-signed certificates is to insert the following code before initialising your HttpClient in order to ignore SSL certificate errors:

ServicePointManager.ServerCertificateValidationCallback += (sender, cert, chain, sslPolicyErrors) => true;

Make sure to include System.Net.

Hope this helps.

Answer 2

This code help for resolve the below error in Xamarin- Windows (UWP) - Windows 8.1

"The text associated with this error code could not be found."

  public interface IServerCommunication
  {
   Task<string> GetFromServerAsync(string URL);
  }   

//later on, when I download the data: (URL is a provided string)

  string result = await DependencyService.Get<IServerCommunication> 
  ().GetFromServerAsync(URL);

   public async Task<string> GetFromServerAsync(string URL)
   {
    HttpClient client = await PreparedClientAsync();

    HttpResponseMessage response;

    try
    {
    response = await client.GetAsync(new Uri(URL));

    IBuffer buffer = await response.Content.ReadAsBufferAsync();
    DataReader reader = DataReader.FromBuffer(buffer);
    byte[] fileContent = new byte[reader.UnconsumedBufferLength];
    reader.ReadBytes(fileContent);
    string result = Encoding.UTF8.GetString(fileContent, 0, fileContent.Length);

    return result;
    }
    catch (Exception ex)
    {
    return "error";
    }
    }


  private async Task<HttpClient> PreparedClientAsync()
  {
   var filter = new Windows.Web.Http.Filters.HttpBaseProtocolFilter();

   filter.IgnorableServerCertificateErrors.Add(ChainValidationResult.Expired);
   filter.IgnorableServerCertificateErrors.Add(ChainValidationResult.Untrusted);
   filter.IgnorableServerCertificateErrors.Add(ChainValidationResult.InvalidName);

    HttpClient client = new HttpClient(filter);

    //I also handle other stuff here (client certificate, authentification), but the 
    lines above should allow the Httpclient to accept all certificates

    return client;
   }