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Replace custom DateTimeFormatter with ToString("r") or TryFormat (#5695)

This commit is contained in:
Kristian Hellang 2018-12-28 19:01:34 +01:00 committed by Pavel Krymets
parent 27f3bd468c
commit a25c7d95e3
2 changed files with 10 additions and 101 deletions
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100
src/Http/Headers/src/DateTimeFormatter.cs
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@ -1,100 +0,0 @@
// Copyright (c) .NET Foundation. All rights reserved.
// Licensed under the Apache License, Version 2.0. See License.txt in the project root for license information.
using System;
using System.Globalization;
using System.Runtime.CompilerServices;
using Microsoft.Extensions.Primitives;
namespace Microsoft.Net.Http.Headers
{
internal static class DateTimeFormatter
{
private static readonly DateTimeFormatInfo FormatInfo = CultureInfo.InvariantCulture.DateTimeFormat;
private static readonly string[] MonthNames = FormatInfo.AbbreviatedMonthNames;
private static readonly string[] DayNames = FormatInfo.AbbreviatedDayNames;
private static readonly int Rfc1123DateLength = "ddd, dd MMM yyyy HH:mm:ss GMT".Length;
private static readonly int QuotedRfc1123DateLength = Rfc1123DateLength + 2;
// ASCII numbers are in the range 48 - 57.
private const int AsciiNumberOffset = 0x30;
private const string Gmt = "GMT";
private const char Comma = ',';
private const char Space = ' ';
private const char Colon = ':';
private const char Quote = '"';
public static string ToRfc1123String(this DateTimeOffset dateTime)
{
return ToRfc1123String(dateTime, false);
}
public static string ToRfc1123String(this DateTimeOffset dateTime, bool quoted)
{
var universal = dateTime.UtcDateTime;
var length = quoted ? QuotedRfc1123DateLength : Rfc1123DateLength;
var target = new InplaceStringBuilder(length);
if (quoted)
{
target.Append(Quote);
}
target.Append(DayNames[(int)universal.DayOfWeek]);
target.Append(Comma);
target.Append(Space);
AppendNumber(ref target, universal.Day);
target.Append(Space);
target.Append(MonthNames[universal.Month - 1]);
target.Append(Space);
AppendYear(ref target, universal.Year);
target.Append(Space);
AppendTimeOfDay(ref target, universal.TimeOfDay);
target.Append(Space);
target.Append(Gmt);
if (quoted)
{
target.Append(Quote);
}
return target.ToString();
}
[MethodImpl(MethodImplOptions.AggressiveInlining)]
private static void AppendYear(ref InplaceStringBuilder target, int year)
{
target.Append(GetAsciiChar(year / 1000));
target.Append(GetAsciiChar(year % 1000 / 100));
target.Append(GetAsciiChar(year % 100 / 10));
target.Append(GetAsciiChar(year % 10));
}
[MethodImpl(MethodImplOptions.AggressiveInlining)]
private static void AppendTimeOfDay(ref InplaceStringBuilder target, TimeSpan timeOfDay)
{
AppendNumber(ref target, timeOfDay.Hours);
target.Append(Colon);
AppendNumber(ref target, timeOfDay.Minutes);
target.Append(Colon);
AppendNumber(ref target, timeOfDay.Seconds);
}
[MethodImpl(MethodImplOptions.AggressiveInlining)]
private static void AppendNumber(ref InplaceStringBuilder target, int number)
{
target.Append(GetAsciiChar(number / 10));
target.Append(GetAsciiChar(number % 10));
}
[MethodImpl(MethodImplOptions.AggressiveInlining)]
private static char GetAsciiChar(int value)
{
return (char)(AsciiNumberOffset + value);
}
}
}

11
src/Http/Headers/src/HeaderUtilities.cs
View File

@ -589,7 +589,16 @@ namespace Microsoft.Net.Http.Headers
public static string FormatDate(DateTimeOffset dateTime, bool quoted) public static string FormatDate(DateTimeOffset dateTime, bool quoted)
{ {
return dateTime.ToRfc1123String(quoted); if (quoted)
{
return string.Create(31, dateTime, (span, dt) =>
{
span[0] = span[30] = '"';
dt.TryFormat(span.Slice(1), out _, "r");
});
}
return dateTime.ToString("r");
} }
public static StringSegment RemoveQuotes(StringSegment input) public static StringSegment RemoveQuotes(StringSegment input)