// Licensed to the .NET Foundation under one or more agreements.
// The .NET Foundation licenses this file to you under the MIT license.
 
namespace Microsoft.Extensions.Http.Diagnostics;
 
/// <summary>
/// Common telemetry constants used by various telemetry libraries.
/// </summary>
public static class TelemetryConstants
{
    /// <summary>
    /// Request metadata key that is used when storing request metadata object.
    /// </summary>
    public const string RequestMetadataKey = "Extensions-RequestMetadata";
 
    /// <summary>
    /// Represents the placeholder text for an unknown request name or dependency name in telemetry.
    /// </summary>
    public const string Unknown = "unknown";
 
    /// <summary>
    /// Represents the placeholder text used for redacted data where needed.
    /// </summary>
    public const string Redacted = "REDACTED";
 
    /// <summary>
    /// Represents the header for client application name, sent on an outgoing HTTP call.
    /// </summary>
    public const string ClientApplicationNameHeader = "X-ClientApplication";
 
    /// <summary>
    /// Represents the header for server application name, sent on a HTTP request.
    /// </summary>
    public const string ServerApplicationNameHeader = "X-ServerApplication";
}