\r\n

51Degrees Device Detection .NET  4.4

Device detection services for 51Degrees Pipeline

Cloud/Metadata-Console/Program.cs

The cloud service exposes meta data that can provide additional information about the various properties that might be returned.This example shows how to access this data and display the values available.

A list of the properties will be displayed, along with some additional information about each property. Note that this is the list of properties used by the supplied resource key, rather than all properties that can be returned by the cloud service.

In addition, the evidence keys that are accepted by the service are listed. These are the keys that, when added to the evidence collection in flow data, could have some impact on the result that is returned.

Bear in mind that this is a list of ALL evidence keys accepted by all products offered by the cloud. If you are only using a single product (for example - device detection) then not all of these keys will be relevant.

This example is available in full on GitHub.

Required NuGet Dependencies:

/* *********************************************************************
* This Original Work is copyright of 51 Degrees Mobile Experts Limited.
* Copyright 2023 51 Degrees Mobile Experts Limited, Davidson House,
* Forbury Square, Reading, Berkshire, United Kingdom RG1 3EU.
*
* This Original Work is licensed under the European Union Public Licence
* (EUPL) v.1.2 and is subject to its terms as set out below.
*
* If a copy of the EUPL was not distributed with this file, You can obtain
* one at https://opensource.org/licenses/EUPL-1.2.
*
* The 'Compatible Licences' set out in the Appendix to the EUPL (as may be
* amended by the European Commission) shall be deemed incompatible for
* the purposes of the Work and the provisions of the compatibility
* clause in Article 5 of the EUPL shall not apply.
*
* If using the Work as, or as part of, a network application, by
* including the attribution notice(s) required under Article 5 of the EUPL
* in the end user terms of the application under an appropriate heading,
* such notice(s) shall fulfill the requirements of that article.
* ********************************************************************* */
using FiftyOne.DeviceDetection.Cloud.FlowElements;
using FiftyOne.Pipeline.CloudRequestEngine.FlowElements;
using FiftyOne.Pipeline.Core.Data;
using Microsoft.Extensions.Logging;
using System;
using System.IO;
{
public class Program
{
public class Example : ExampleBase
{
public void Run(string resourceKey, ILoggerFactory loggerFactory, TextWriter output)
{
using (var pipeline = new DeviceDetectionPipelineBuilder(loggerFactory)
.UseCloud(resourceKey)
.Build())
{
OutputProperties(pipeline.GetElement<DeviceDetectionCloudEngine>(), output);
// We use the CloudRequestEngine to get evidence key details, rather than the
// DeviceDetectionCloudEngine.
// This is because the DeviceDetectionCloudEngine doesn't actually make use
// of any evidence values. It simply processes the JSON that is returned
// by the call to the cloud service that is made by the CloudRequestEngine.
// The CloudRequestEngine is actually taking the evidence values and passing
// them to the cloud, so that's the engine we want the keys from.
OutputEvidenceKeyDetails(pipeline.GetElement<CloudRequestEngine>(), output);
}
}
private void OutputEvidenceKeyDetails(CloudRequestEngine engine, TextWriter output)
{
output.WriteLine();
if (typeof(EvidenceKeyFilterWhitelist).IsAssignableFrom(engine.EvidenceKeyFilter.GetType()))
{
// If the evidence key filter extends EvidenceKeyFilterWhitelist then we can
// display a list of accepted keys.
var filter = engine.EvidenceKeyFilter as EvidenceKeyFilterWhitelist;
output.WriteLine($"Accepted evidence keys:");
foreach (var entry in filter.Whitelist)
{
output.WriteLine($"\t{entry.Key}");
}
}
else
{
output.WriteLine($"The evidence key filter has type " +
$"{engine.EvidenceKeyFilter.GetType().Name}. As this does not extend " +
$"EvidenceKeyFilterWhitelist, a list of accepted values cannot be " +
$"displayed. As an alternative, you can pass evidence keys to " +
$"filter.Include(string) to see if a particular key will be included " +
$"or not.");
output.WriteLine($"For example, header.user-agent is " +
(engine.EvidenceKeyFilter.Include("header.user-agent") ? "" : "not ") +
"accepted.");
}
}
private void OutputProperties(DeviceDetectionCloudEngine engine, TextWriter output)
{
foreach (var property in engine.Properties)
{
// Output some details about the property.
// If we're outputting to console then we also add some formatting to make it
// more readable.
Console.ForegroundColor = ConsoleColor.White;
Console.BackgroundColor = ConsoleColor.DarkRed;
output.Write($"Property - {property.Name}");
Console.ResetColor();
var typeName = property.Type.IsGenericType ?
property.Type.GenericTypeArguments[0].Name : property.Type.Name;
output.WriteLine($"[Category: {property.Category}] ({typeName})");
}
}
}
static void Main(string[] args)
{
// Use the command line args to get the resource key if present.
// Otherwise, get it from the environment variable.
string resourceKey = args.Length > 0 ? args[0] :
Environment.GetEnvironmentVariable(
ExampleUtils.CLOUD_RESOURCE_KEY_ENV_VAR);
// Configure a logger to output to the console.
var loggerFactory = LoggerFactory.Create(b => b.AddConsole());
var logger = loggerFactory.CreateLogger<Program>();
if (string.IsNullOrEmpty(resourceKey))
{
logger.LogError($"No resource key specified in the configuration file " +
$"'appsettings.json' or the environment variable " +
$"'{ExampleUtils.CLOUD_RESOURCE_KEY_ENV_VAR}'. The 51Degrees cloud service is " +
$"accessed using a 'ResourceKey'. For more information see " +
$"https://51degrees.com/documentation/_info__resource_keys.html. " +
$"A resource key with the properties required by this example can be " +
$"created for free at https://configure.51degrees.com/1QWJwHxl. " +
$"Once complete, supply the resource key as a command line argument or via " +
$"the environment variable mentioned at the start of this message.");
}
else
{
new Example().Run(resourceKey, loggerFactory, Console.Out);
}
// Dispose the logger to ensure any messages get flushed
loggerFactory.Dispose();
}
}
}