Create the Http service for support SSL both on Android and iOS with Xamarin Form

If you try to make a API call in xamarin, you should use the HTTPClient, this is a standard network call for c#, but when you try to call with SSL on Android, you will get the below error:

For solve this is issue, you need to ignore the SSL hostname verifier on Android, so you need to create a custom service for this.

  1. Create the IHttpClientHandler interface in form project:
//file name:  IHttpClientHandler.cs
using System;
using System.Net.Http;

namespace MyMobileApp.Services
{
    public interface IHttpClientHandler
    {
        HttpClient GetHttpClient();
    }
}
  1. For iOS, just use the default HttpClient is ok, so create the iOS service in iOS project as below:
//file name: HttpClientiOS.cs
using System;
using System.Net.Http;
using System.Runtime.CompilerServices;
using MyMobileApp.iOS.Services;
using MyMobileApp.Services;
using Xamarin.Forms;


[assembly: Xamarin.Forms.Dependency(typeof(HttpClientiOS))]
namespace MyMobile.iOS.Services
{  

    public class HttpClientiOS : IHttpClientHandler
    {
        public HttpClient GetHttpClient()
        {
            var client = new HttpClient();
            return client;
        }
    }
}
  1. Create the android service to ignore the SSL hostname verifier:
//file name: HttpClientAndroid.cs
using System;
using System.Net.Http;
using Android.Net;
using Javax.Net.Ssl;
using Org.Apache.Http.Client;
using MyMobile.Droid.Services;
using MyMobile.Services;
using Xamarin.Android.Net;
using Xamarin.Forms;

[assembly: Dependency(typeof(HttpClientAndroid))]
namespace MyMobile.Droid.Services
{
    public class HttpClientAndroid : IHttpClientHandler
    {
        public HttpClient GetHttpClient()
        {
            var client = new HttpClient(new IgnoreSSLClientHandler());
            return client;
        }
    }

    internal class IgnoreSSLClientHandler : AndroidClientHandler
    {
        protected override SSLSocketFactory ConfigureCustomSSLSocketFactory(HttpsURLConnection connection)
        {
            return SSLCertificateSocketFactory.GetInsecure(1000, null);
        }

        protected override IHostnameVerifier GetSSLHostnameVerifier(HttpsURLConnection connection)
        {
            return new IgnoreSSLHostnameVerifier();
        }
    }

    internal class IgnoreSSLHostnameVerifier : Java.Lang.Object, IHostnameVerifier
    {
        public bool Verify(string hostname, ISSLSession session)
        {
            return true;
        }
    }
}

4. Use the service in form project:

using (var client = DependencyService.Get<Services.IHttpClientHandler>().GetHttpClient())
{
    //do the logic for call API
    var jsonRequest = new { email = this.Email, password = this.Password };

    var serializedJsonRequest = JsonConvert.SerializeObject(jsonRequest);
    HttpContent content = new StringContent(serializedJsonRequest, Encoding.UTF8, "application/json");

    var response = await client.PostAsync(new Uri(Globals.APIs.login), content);
    if (response.IsSuccessStatusCode)
    {
        //todo...
    }
}

It’s done!

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