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Imported Upstream version 4.0.0~alpha1

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Former-commit-id: 806294f5ded97629b74c85c09952f2a74fe182d9
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Jo Shields
2015-04-07 09:35:12 +01:00
parent 283343f570
commit 3c1f479b9d
22469 changed files with 2931443 additions and 869343 deletions
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472
external/referencesource/System.ServiceModel.Web/System/ServiceModel/Web/HttpDateParse.cs vendored Normal file
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//------------------------------------------------------------
// Copyright (c) Microsoft Corporation. All rights reserved.
//------------------------------------------------------------
namespace System.ServiceModel.Web
{
using System;
using System.Globalization;
// DO NOT EDIT THIS CODE.
//
// All of the code from this class was taken from build 20717.00
// of System.Net.HttpDateParse. If there is a bug with this code
// it should be fixed in the original System.Net.HttpDateParse
// and then ported here. [[....]]
internal static class HttpDateParse
{
private const int BASE_DEC = 10; // base 10
//
// Date indicies used to figure out what each entry is.
//
private const int DATE_INDEX_DAY_OF_WEEK = 0;
private const int DATE_1123_INDEX_DAY = 1;
private const int DATE_1123_INDEX_MONTH = 2;
private const int DATE_1123_INDEX_YEAR = 3;
private const int DATE_1123_INDEX_HRS = 4;
private const int DATE_1123_INDEX_MINS = 5;
private const int DATE_1123_INDEX_SECS = 6;
private const int DATE_ANSI_INDEX_MONTH = 1;
private const int DATE_ANSI_INDEX_DAY = 2;
private const int DATE_ANSI_INDEX_HRS = 3;
private const int DATE_ANSI_INDEX_MINS = 4;
private const int DATE_ANSI_INDEX_SECS = 5;
private const int DATE_ANSI_INDEX_YEAR = 6;
private const int DATE_INDEX_TZ = 7;
private const int DATE_INDEX_LAST = DATE_INDEX_TZ;
private const int MAX_FIELD_DATE_ENTRIES = (DATE_INDEX_LAST + 1);
//
// DATE_TOKEN's DWORD values used to determine what day/month we're on
//
private const int DATE_TOKEN_JANUARY = 1;
private const int DATE_TOKEN_FEBRUARY = 2;
private const int DATE_TOKEN_MARCH = 3;
private const int DATE_TOKEN_APRIL = 4;
private const int DATE_TOKEN_MAY = 5;
private const int DATE_TOKEN_JUNE = 6;
private const int DATE_TOKEN_JULY = 7;
private const int DATE_TOKEN_AUGUST = 8;
private const int DATE_TOKEN_SEPTEMBER = 9;
private const int DATE_TOKEN_OCTOBER = 10;
private const int DATE_TOKEN_NOVEMBER = 11;
private const int DATE_TOKEN_DECEMBER = 12;
private const int DATE_TOKEN_LAST_MONTH = (DATE_TOKEN_DECEMBER + 1);
private const int DATE_TOKEN_SUNDAY = 0;
private const int DATE_TOKEN_MONDAY = 1;
private const int DATE_TOKEN_TUESDAY = 2;
private const int DATE_TOKEN_WEDNESDAY = 3;
private const int DATE_TOKEN_THURSDAY = 4;
private const int DATE_TOKEN_FRIDAY = 5;
private const int DATE_TOKEN_SATURDAY = 6;
private const int DATE_TOKEN_LAST_DAY = (DATE_TOKEN_SATURDAY + 1);
private const int DATE_TOKEN_GMT = -1000;
private const int DATE_TOKEN_LAST = DATE_TOKEN_GMT;
private const int DATE_TOKEN_ERROR = (DATE_TOKEN_LAST + 1);
//
// MakeUpper - takes an assumed lower character and bit manipulates into a upper.
// (make sure the character is Lower case alpha char to begin,
// otherwise it corrupts)
//
static char MakeUpper(char c)
{
return (Char.ToUpper(c, CultureInfo.InvariantCulture));
}
// Routine Description:
//
// Looks at the first three bytes of string to determine if we're looking
// at a Day of the Week, or Month, or "GMT" string. Is inlined so that
// the compiler can optimize this code into the caller FInternalParseHttpDate.
//
// Arguments:
//
// lpszDay - a string ptr to the first byte of the string in question.
//
// Return Value:
//
// DWORD
// Success - The Correct date token, 0-6 for day of the week, 1-14 for month, etc
//
// Failure - DATE_TOKEN_ERROR
static int MapDayMonthToDword(char[] lpszDay, int index)
{
switch (MakeUpper(lpszDay[index]))
{ // make uppercase
case 'A':
switch (MakeUpper(lpszDay[index + 1]))
{
case 'P':
return DATE_TOKEN_APRIL;
case 'U':
return DATE_TOKEN_AUGUST;
}
return DATE_TOKEN_ERROR;
case 'D':
return DATE_TOKEN_DECEMBER;
case 'F':
switch (MakeUpper(lpszDay[index + 1]))
{
case 'R':
return DATE_TOKEN_FRIDAY;
case 'E':
return DATE_TOKEN_FEBRUARY;
}
return DATE_TOKEN_ERROR;
case 'G':
return DATE_TOKEN_GMT;
case 'M':
switch (MakeUpper(lpszDay[index + 1]))
{
case 'O':
return DATE_TOKEN_MONDAY;
case 'A':
switch (MakeUpper(lpszDay[index + 2]))
{
case 'R':
return DATE_TOKEN_MARCH;
case 'Y':
return DATE_TOKEN_MAY;
}
// fall through to error
break;
}
return DATE_TOKEN_ERROR;
case 'N':
return DATE_TOKEN_NOVEMBER;
case 'J':
switch (MakeUpper(lpszDay[index + 1]))
{
case 'A':
return DATE_TOKEN_JANUARY;
case 'U':
switch (MakeUpper(lpszDay[index + 2]))
{
case 'N':
return DATE_TOKEN_JUNE;
case 'L':
return DATE_TOKEN_JULY;
}
// fall through to error
break;
}
return DATE_TOKEN_ERROR;
case 'O':
return DATE_TOKEN_OCTOBER;
case 'S':
switch (MakeUpper(lpszDay[index + 1]))
{
case 'A':
return DATE_TOKEN_SATURDAY;
case 'U':
return DATE_TOKEN_SUNDAY;
case 'E':
return DATE_TOKEN_SEPTEMBER;
}
return DATE_TOKEN_ERROR;
case 'T':
switch (MakeUpper(lpszDay[index + 1]))
{
case 'U':
return DATE_TOKEN_TUESDAY;
case 'H':
return DATE_TOKEN_THURSDAY;
}
return DATE_TOKEN_ERROR;
case 'U':
return DATE_TOKEN_GMT;
case 'W':
return DATE_TOKEN_WEDNESDAY;
}
return DATE_TOKEN_ERROR;
}
// Routine Description:
//
// Parses through a ANSI, RFC850, or RFC1123 date format and covents it into
// a FILETIME/SYSTEMTIME time format.
//
// Important this a time-critical function and should only be changed
// with the intention of optimizing or a critical need work item.
//
// Arguments:
//
// lpft - Ptr to FILETIME structure. Used to store converted result.
// Must be NULL if not intended to be used !!!
//
// lpSysTime - Ptr to SYSTEMTIME struture. Used to return Systime if needed.
//
// lpcszDateStr - Const Date string to parse.
//
// Return Value:
//
// BOOL
// Success - TRUE
// Failure - FALSE
internal static bool ParseHttpDate(String DateString, out DateTime dtOut)
{
int index = 0;
int i = 0, iLastLettered = -1;
bool fIsANSIDateFormat = false;
int[] rgdwDateParseResults = new int[MAX_FIELD_DATE_ENTRIES];
bool fRet = true;
char[] lpInputBuffer = DateString.ToCharArray();
dtOut = new DateTime();
//
// Date Parsing v2 (1 more to go), and here is how it works...
// We take a date string and churn through it once, converting
// integers to integers, Month,Day, and GMT strings into integers,
// and all is then placed IN order in a temp array.
//
// At the completetion of the parse stage, we simple look at
// the data, and then map the results into the correct
// places in the SYSTIME structure. Simple, No allocations, and
// No dirting the data.
//
// The end of the function does something munging and pretting
// up of the results to handle the year 2000, and TZ offsets
// Note: do we need to fully handle TZs anymore?
//
while (index < DateString.Length && i < MAX_FIELD_DATE_ENTRIES)
{
if (lpInputBuffer[index] >= '0' && lpInputBuffer[index] <= '9')
{
//
// we have a numerical entry, scan through it and convent to DWORD
//
rgdwDateParseResults[i] = 0;
do
{
rgdwDateParseResults[i] *= BASE_DEC;
rgdwDateParseResults[i] += (lpInputBuffer[index] - '0');
index++;
} while (index < DateString.Length &&
lpInputBuffer[index] >= '0' &&
lpInputBuffer[index] <= '9');
i++; // next token
}
else if ((lpInputBuffer[index] >= 'A' && lpInputBuffer[index] <= 'Z') ||
(lpInputBuffer[index] >= 'a' && lpInputBuffer[index] <= 'z'))
{
//
// we have a string, should be a day, month, or GMT
// lets skim to the end of the string
//
rgdwDateParseResults[i] =
MapDayMonthToDword(lpInputBuffer, index);
iLastLettered = i;
// We want to ignore the possibility of a time zone such as PST or EST in a non-standard
// date format such as "Thu Dec 17 16:01:28 PST 1998" (Notice that the year is _after_ the time zone
if ((rgdwDateParseResults[i] == DATE_TOKEN_ERROR)
&&
!(fIsANSIDateFormat && (i == DATE_ANSI_INDEX_YEAR)))
{
fRet = false;
goto quit;
}
//
// At this point if we have a vaild string
// at this index, we know for sure that we're
// looking at a ANSI type DATE format.
//
if (i == DATE_ANSI_INDEX_MONTH)
{
fIsANSIDateFormat = true;
}
//
// Read past the end of the current set of alpha characters,
// as MapDayMonthToDword only peeks at a few characters
//
do
{
index++;
} while (index < DateString.Length &&
((lpInputBuffer[index] >= 'A' && lpInputBuffer[index] <= 'Z') ||
(lpInputBuffer[index] >= 'a' && lpInputBuffer[index] <= 'z')));
i++; // next token
}
else
{
//
// For the generic case its either a space, comma, semi-colon, etc.
// the point is we really don't care, nor do we need to waste time
// worring about it (the orginal code did). The point is we
// care about the actual date information, So we just advance to the
// next lexume.
//
index++;
}
}
//
// We're finished parsing the string, now take the parsed tokens
// and turn them to the actual structured information we care about.
// So we build lpSysTime from the Array, using a local if none is passed in.
//
int year;
int month;
int day;
int hour;
int minute;
int second;
int millisecond;
millisecond = 0;
if (fIsANSIDateFormat)
{
day = rgdwDateParseResults[DATE_ANSI_INDEX_DAY];
month = rgdwDateParseResults[DATE_ANSI_INDEX_MONTH];
hour = rgdwDateParseResults[DATE_ANSI_INDEX_HRS];
minute = rgdwDateParseResults[DATE_ANSI_INDEX_MINS];
second = rgdwDateParseResults[DATE_ANSI_INDEX_SECS];
if (iLastLettered != DATE_ANSI_INDEX_YEAR)
{
year = rgdwDateParseResults[DATE_ANSI_INDEX_YEAR];
}
else
{
// This is a fix to get around toString/toGMTstring (where the timezone is
// appended at the end. (See above)
year = rgdwDateParseResults[DATE_INDEX_TZ];
}
}
else
{
day = rgdwDateParseResults[DATE_1123_INDEX_DAY];
month = rgdwDateParseResults[DATE_1123_INDEX_MONTH];
year = rgdwDateParseResults[DATE_1123_INDEX_YEAR];
hour = rgdwDateParseResults[DATE_1123_INDEX_HRS];
minute = rgdwDateParseResults[DATE_1123_INDEX_MINS];
second = rgdwDateParseResults[DATE_1123_INDEX_SECS];
}
//
// Normalize the year, 90 == 1990, handle the year 2000, 02 == 2002
// This is Year 2000 handling folks!!! We get this wrong and
// we all look bad.
//
if (year < 100)
{
year += ((year < 80) ? 2000 : 1900);
}
//
// if we got misformed time, then plug in the current time
// !lpszHrs || !lpszMins || !lpszSec
//
if ((i < 4)
|| (day > 31)
|| (hour > 23)
|| (minute > 59)
|| (second > 59))
{
fRet = false;
goto quit;
}
//
// Now do the DateTime conversion
//
dtOut = new DateTime(year, month, day, hour, minute, second, millisecond);
//
// we want the system time to be accurate. This is _suhlow_
// The time passed in is in the local time zone; we have to convert this into GMT.
//
if (iLastLettered == DATE_ANSI_INDEX_YEAR)
{
// this should be an unusual case.
dtOut = dtOut.ToUniversalTime();
}
//
// If we have an Offset to another Time Zone
// then convert to appropriate GMT time
//
if ((i > DATE_INDEX_TZ &&
rgdwDateParseResults[DATE_INDEX_TZ] != DATE_TOKEN_GMT))
{
//
// if we received +/-nnnn as offset (hhmm), modify the output FILETIME
//
double offset;
offset = (double)rgdwDateParseResults[DATE_INDEX_TZ];
dtOut.AddHours(offset);
}
// In the end, we leave it all in LocalTime
dtOut = dtOut.ToLocalTime();
quit:
return fRet;
}
}
}