-
Notifications
You must be signed in to change notification settings - Fork 1.1k
Commit
This commit does not belong to any branch on this repository, and may belong to a fork outside of the repository.
- Loading branch information
Showing
3 changed files
with
35 additions
and
4 deletions.
There are no files selected for viewing
This file contains bidirectional Unicode text that may be interpreted or compiled differently than what appears below. To review, open the file in an editor that reveals hidden Unicode characters.
Learn more about bidirectional Unicode characters
Original file line number | Diff line number | Diff line change |
---|---|---|
@@ -0,0 +1,35 @@ | ||
// Licensed to the .NET Foundation under one or more agreements. | ||
// The .NET Foundation licenses this file to you under the MIT license. | ||
|
||
using System; | ||
using System.Numerics; | ||
using System.Security.Cryptography; | ||
using System.Text; | ||
|
||
namespace Microsoft.AspNetCore.StaticWebAssets.Tasks; | ||
|
||
public static class FileHasher | ||
{ | ||
public static string GetFileHash(string filePath) | ||
{ | ||
using var hash = SHA256.Create(); | ||
var bytes = Encoding.UTF8.GetBytes(filePath); | ||
var hashBytes = hash.ComputeHash(bytes); | ||
return ToBase36(hashBytes); | ||
} | ||
|
||
private static string ToBase36(byte[] hash) | ||
{ | ||
const string chars = "0123456789abcdefghijklmnopqrstuvwxyz"; | ||
|
||
var result = new char[10]; | ||
var dividend = BigInteger.Abs(new BigInteger(hash.AsSpan().Slice(0, 9).ToArray())); | ||
for (var i = 0; i < 10; i++) | ||
{ | ||
dividend = BigInteger.DivRem(dividend, 36, out var remainder); | ||
result[i] = chars[(int)remainder]; | ||
} | ||
|
||
return new string(result); | ||
} | ||
} |
This file contains bidirectional Unicode text that may be interpreted or compiled differently than what appears below. To review, open the file in an editor that reveals hidden Unicode characters.
Learn more about bidirectional Unicode characters
This file contains bidirectional Unicode text that may be interpreted or compiled differently than what appears below. To review, open the file in an editor that reveals hidden Unicode characters.
Learn more about bidirectional Unicode characters