mcs/class/System.Net.Http/System.Net.Http/HttpClient.android.cs

   1 using System;
   2 using System.Reflection;
   3
   4 namespace System.Net.Http {
   5         public partial class HttpClient {
   6
   7                 public HttpClient ()
   8                         : this (GetDefaultHandler (), true)
   9                 {
  10                 }
  11
  12                 static HttpMessageHandler GetDefaultHandler ()
  13                 {
  14                         Type type = Type.GetType("Android.Runtime.AndroidEnvironment, Mono.Android");
  15                         if (type == null)
  16                                 return GetFallback ("Invalid Mono.Android assembly? Cannot find Android.Runtime.AndroidEnvironment");
  17
  18                         MethodInfo method = type.GetMethod ("GetHttpMessageHandler", BindingFlags.Static | BindingFlags.NonPublic);
  19                         if (method == null)
  20                                 return GetFallback ("Your Xamarin.Android version does not support obtaining of the custom HttpClientHandler");
  21
  22                         object ret = method.Invoke (null, null);
  23                         if (ret == null)
  24                                 return GetFallback ("Xamarin.Android returned no custom HttpClientHandler");
  25
  26                         var handler = ret as HttpMessageHandler;
  27                         if (handler == null)
  28                                 return GetFallback ($"{ret?.GetType()} is not a valid HttpMessageHandler");
  29                         return handler;
  30                 }
  31
  32                 static HttpMessageHandler GetFallback (string message)
  33                 {
  34                         Console.WriteLine (message + ". Defaulting to System.Net.Http.HttpClientHandler");
  35                         return new HttpClientHandler ();
  36                 }
  37         }
  38 }