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Optimize new use of Base64Url #57050

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Merged
merged 2 commits into from
Jul 31, 2024
Merged

Optimize new use of Base64Url #57050

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01fcf76
Optimize new use of Base64Url
stephentoub Jul 29, 2024
b81bd50
Clarify comment
amcasey Jul 31, 2024
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@amcasey
amcasey authored Jul 31, 2024
commit b81bd50fcf941cdf321e7d7aa04c65883a272e43
2 changes: 1 addition & 1 deletion src/Shared/WebEncoders/WebEncoders.cs
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Expand Up @@ -75,7 +75,7 @@ public static byte[] Base64UrlDecode(string input, int offset, int count)
#if NET9_0_OR_GREATER
// Legacy behavior of Base64UrlDecode supports either Base64 or Base64Url input.
// If it has a - or _, or if it doesn't have + or /, it can be treated as Base64Url.
// Searching for any of them allows us to stop the search as early as we know Base64Url should be used.
// Searching for any of them allows us to stop the search as early as we know whether Base64Url should be used.
ReadOnlySpan<char> inputSpan = input.AsSpan(offset, count);
int indexOfFirstDifferentiator = inputSpan.IndexOfAny(s_base64vsBase64UrlDifferentiators);
if (indexOfFirstDifferentiator < 0 || inputSpan[indexOfFirstDifferentiator] is '-' or '_')
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