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Thread-safe HttpKnownHeaderNames initialization (#15519)

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This commit is contained in:
Ilya
2021-08-04 15:00:26 -07:00
committed by GitHub
parent 3e86f9b287
commit aaaa0f2baa
1 changed files with 20 additions and 22 deletions
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src/Microsoft.PowerShell.Commands.Utility/commands/utility/WebCmdlet/CoreCLR/HttpKnownHeaderNames.cs
+20 -22
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@@ -78,31 +78,29 @@ namespace Microsoft.PowerShell.Commands
#endregion Known_HTTP_Header_Names
private static HashSet<string> s_contentHeaderSet = null;
private static readonly HashSet<string> s_contentHeaderSet;
static HttpKnownHeaderNames()
{
// Thread-safe initialization.
s_contentHeaderSet = new HashSet<string>(StringComparer.OrdinalIgnoreCase);
s_contentHeaderSet.Add(HttpKnownHeaderNames.Allow);
s_contentHeaderSet.Add(HttpKnownHeaderNames.ContentDisposition);
s_contentHeaderSet.Add(HttpKnownHeaderNames.ContentEncoding);
s_contentHeaderSet.Add(HttpKnownHeaderNames.ContentLanguage);
s_contentHeaderSet.Add(HttpKnownHeaderNames.ContentLength);
s_contentHeaderSet.Add(HttpKnownHeaderNames.ContentLocation);
s_contentHeaderSet.Add(HttpKnownHeaderNames.ContentMD5);
s_contentHeaderSet.Add(HttpKnownHeaderNames.ContentRange);
s_contentHeaderSet.Add(HttpKnownHeaderNames.ContentType);
s_contentHeaderSet.Add(HttpKnownHeaderNames.Expires);
s_contentHeaderSet.Add(HttpKnownHeaderNames.LastModified);
}
internal static HashSet<string> ContentHeaders
{
get
{
if (s_contentHeaderSet == null)
{
s_contentHeaderSet = new HashSet<string>(StringComparer.OrdinalIgnoreCase);
s_contentHeaderSet.Add(HttpKnownHeaderNames.Allow);
s_contentHeaderSet.Add(HttpKnownHeaderNames.ContentDisposition);
s_contentHeaderSet.Add(HttpKnownHeaderNames.ContentEncoding);
s_contentHeaderSet.Add(HttpKnownHeaderNames.ContentLanguage);
s_contentHeaderSet.Add(HttpKnownHeaderNames.ContentLength);
s_contentHeaderSet.Add(HttpKnownHeaderNames.ContentLocation);
s_contentHeaderSet.Add(HttpKnownHeaderNames.ContentMD5);
s_contentHeaderSet.Add(HttpKnownHeaderNames.ContentRange);
s_contentHeaderSet.Add(HttpKnownHeaderNames.ContentType);
s_contentHeaderSet.Add(HttpKnownHeaderNames.Expires);
s_contentHeaderSet.Add(HttpKnownHeaderNames.LastModified);
}
return s_contentHeaderSet;
}
get => s_contentHeaderSet;
}
}
}