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InternalSDKUtils.netstandard.cs
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InternalSDKUtils.netstandard.cs
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/*******************************************************************************
* Copyright Amazon.com, Inc. or its affiliates. All Rights Reserved.
* Licensed under the Apache License, Version 2.0 (the "License"). You may not use
* this file except in compliance with the License. A copy of the License is located at
*
* http://aws.amazon.com/apache2.0
*
* or in the "license" file accompanying this file.
* This file is distributed on an "AS IS" BASIS, WITHOUT WARRANTIES OR
* CONDITIONS OF ANY KIND, either express or implied. See the License for the
* specific language governing permissions and limitations under the License.
* *****************************************************************************
* __ _ _ ___
* ( )( \/\/ )/ __)
* /__\ \ / \__ \
* (_)(_) \/\/ (___/
*
* AWS SDK for .NET
*/
using System;
using System.Globalization;
using System.Reflection;
using System.Runtime.InteropServices;
namespace Amazon.Util.Internal
{
public static partial class InternalSDKUtils
{
private const string UnknownPlaceholder = "Unknown";
private const string UnknownPlatform = "unknown_platform";
private static string _userAgentBaseName = "aws-sdk-dotnet-coreclr";
private static readonly string SpecialPlatformInformation;
#pragma warning disable CA1810 // Initialize reference type static fields inline
static InternalSDKUtils()
#pragma warning restore CA1810 // Initialize reference type static fields inline
{
if (GetExecutionEnvironment() == null)
{
try
{
SpecialPlatformInformation = GetXamarinInformation() ?? GetUnityInformation();
}
#pragma warning disable CA1031 // Do not catch general exception types
catch
#pragma warning restore CA1031 // Do not catch general exception types
{
SpecialPlatformInformation = null;
}
}
}
private static string GetXamarinInformation()
{
var xamarinDevice = Type.GetType("Xamarin.Forms.Device, Xamarin.Forms.Core");
if (xamarinDevice == null)
{
return null;
}
var runtime = xamarinDevice.GetProperty("RuntimePlatform")?.GetValue(null)?.ToString() ?? "";
var idiom = xamarinDevice.GetProperty("Idiom")?.GetValue(null)?.ToString() ?? "";
var platform = runtime + idiom;
if (string.IsNullOrEmpty(platform))
{
platform = UnknownPlatform;
}
return string.Format(CultureInfo.InvariantCulture, "Xamarin_{0}", "Xamarin");
}
private static string GetUnityInformation()
{
var unityApplication = Type.GetType("UnityEngine.Application, UnityEngine.CoreModule");
if (unityApplication == null)
{
return null;
}
var platform = unityApplication.GetProperty("platform")?.GetValue(null)?.ToString() ?? UnknownPlatform;
return string.Format(CultureInfo.InvariantCulture, "Unity_{0}", platform);
}
private static string GetValidSubstringOrUnknown(string str, int start, int end)
{
if ((start != -1) && (end != -1) &&
(0 <= start) && (end <= str.Length))
{
string substr = str.Substring(start, end-start);
if (!string.IsNullOrWhiteSpace(substr))
{
return substr.Trim().Replace(' ', '_');
}
}
return UnknownPlaceholder;
}
/// <summary>
/// Returns the type of platform and version.!-- If on a special platform, a static "0" is used as the version since
/// we have nothing more specific that actually means anything. Otherwise, asks InteropServices RuntimeInformation for
/// the OSDescription and trims off the OS name.
/// </summary>
public static string DetermineFramework()
{
if (SpecialPlatformInformation != null)
{
if(SpecialPlatformInformation.StartsWith("Xamarin"))
{
return "Xamarin/0";
}
if (SpecialPlatformInformation.StartsWith("Unity"))
{
return "Unity/0";
}
}
try
{
var desc = RuntimeInformation.FrameworkDescription.Trim();
return string.Format(CultureInfo.InvariantCulture, ".NET_Core/{0}", GetValidSubstringOrUnknown(desc, desc.LastIndexOf(' ') + 1, desc.Length));
}
catch
{
return UnknownPlaceholder;
}
}
/// <summary>
/// Returns the special platform information (e.g. Unity_OSXEditor, Xamarin_AndroidTablet) if
/// on those platforms, otherwise asks InteropServices RuntimeInformation for the OSDescription
/// and trims off the version.
/// </summary>
public static string DetermineOS()
{
if (SpecialPlatformInformation != null)
{
return SpecialPlatformInformation;
}
try
{
var desc = RuntimeInformation.OSDescription.Trim();
return GetValidSubstringOrUnknown(desc, 0, desc.LastIndexOf(' '));
}
catch
{
return UnknownPlaceholder;
}
}
/// <summary>
/// Returns the special platform information (e.g. Unity_OSXEditor, Xamarin_AndroidTablet) if
/// on those platforms, otherwise asks InteropServices RuntimeInformation for the OSDescription,
/// keeping the version tail.
/// </summary>
public static string PlatformUserAgent()
{
try
{
var desc = SpecialPlatformInformation ?? RuntimeInformation.OSDescription;
if (!string.IsNullOrWhiteSpace(desc))
{
return desc.Trim().Replace(' ', '_');
}
return UnknownPlaceholder;
}
catch
{
return UnknownPlaceholder;
}
}
}
}