RuntimeSettingParser.cs

Go to the documentation of this file.

using System.Globalization;
 
namespace System.Net.Http;
 
internal static class RuntimeSettingParser
{
    public static bool QueryRuntimeSettingSwitch(string appCtxSettingName, string environmentVariableSettingName, bool defaultValue)
    {
        if (AppContext.TryGetSwitch(appCtxSettingName, out var isEnabled))
        {
            return isEnabled;
        }
        string environmentVariable = Environment.GetEnvironmentVariable(environmentVariableSettingName);
        if (bool.TryParse(environmentVariable, out isEnabled))
        {
            return isEnabled;
        }
        if (uint.TryParse(environmentVariable, out var result))
        {
            return result != 0;
        }
        return defaultValue;
    }
 
    public static int ParseInt32EnvironmentVariableValue(string environmentVariableSettingName, int defaultValue)
    {
        string environmentVariable = Environment.GetEnvironmentVariable(environmentVariableSettingName);
        if (int.TryParse(environmentVariable, NumberStyles.Any, CultureInfo.InvariantCulture, out var result))
        {
            return result;
        }
        return defaultValue;
    }
 
    public static double ParseDoubleEnvironmentVariableValue(string environmentVariableSettingName, double defaultValue)
    {
        string environmentVariable = Environment.GetEnvironmentVariable(environmentVariableSettingName);
        if (double.TryParse(environmentVariable, NumberStyles.Any, CultureInfo.InvariantCulture, out var result))
        {
            return result;
        }
        return defaultValue;
    }
}