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Utilities.cs
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Utilities.cs
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using System;
using System.IO;
using System.Threading;
using System.Threading.Tasks;
namespace ChangeTokenSample.Utilities
{
public static class Utilities
{
#region snippet1
public static byte[] ComputeHash(string filePath)
{
var runCount = 1;
while(runCount < 4)
{
try
{
if (File.Exists(filePath))
{
using (var fs = File.OpenRead(filePath))
{
return System.Security.Cryptography.SHA1
.Create().ComputeHash(fs);
}
}
else
{
throw new FileNotFoundException();
}
}
catch (IOException ex)
{
if (runCount == 3)
{
throw;
}
Thread.Sleep(TimeSpan.FromSeconds(Math.Pow(2, runCount)));
runCount++;
}
}
return new byte[20];
}
#endregion
public static void WriteConsole(string s)
{
var consoleString = $"{DateTime.Now} {s}";
var l = consoleString.Length;
Console.WriteLine(new string('*', l));
Console.WriteLine(consoleString);
Console.WriteLine(new string('*', l));
}
#region snippet2
public async static Task<string> GetFileContent(string filePath)
{
var runCount = 1;
while(runCount < 4)
{
try
{
if (File.Exists(filePath))
{
using (var fileStreamReader = File.OpenText(filePath))
{
return await fileStreamReader.ReadToEndAsync();
}
}
else
{
throw new FileNotFoundException();
}
}
catch (IOException ex)
{
if (runCount == 3)
{
throw;
}
Thread.Sleep(TimeSpan.FromSeconds(Math.Pow(2, runCount)));
runCount++;
}
}
return null;
}
#endregion
}
}