Date/Time to UTC (HTTP RFC 2616) compatible format

[Zedna]

I need some elegant way in Autoit for converting date/time to format compatible with RFC 2616 used in HTTP protocol/communication

Here are some references:

http://www.w3.org/Protocols/rfc2616/rfc2616-sec3.html

http://www.w3schools.com/jsref/jsref_utc.asp

VB/C - ToUniversalTime http://msdn.microsoft.com/en-us/library/system.datetime.touniversaltime%28v=vs.71%29.aspx

The result should be something like this:

Fri Mar 30 2012 02:00:00 GMT+0200

Here are some scripts for this in other language:

JAVA

new Date("2012-07-21 10:12:14").toUTCString()

PHP

gmstrftime("%a, %d %b %Y %T %Z", strtotime("2012-07-21 10:12:14"));

Ruby

require 'time'
Time.parse('2012-07-21 10:12:14').httpdate

EDIT:

I need this for my Odorik.cz API project, see details here

Edited April 5, 2012 by Zedna

[jchd]

A modified WinHTTP function may be a convenient start:

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; #FUNCTION# ;===============================================================================
;
; Name...........: __WinHttpTimeFromSystemTime
; Description ...: Formats a system date and time according to the HTTP version 1.0 specification.
; Syntax.........: __WinHttpTimeFromSystemTime()
; Parameters ....: None.
; Return values .: Success - Returns 1.
;                         - Sets @error to 0
;                 Failure - Returns 0 and sets @error:
;                 |1 - Initial DllCall failed.
;                 |2 - Main DllCall failed.
; Author ........: trancexx
; Modified.......: jchd (changed GetSystemTime to GetLocalTime) TODO change output from "GMT" to correct time adjustment
; Remarks .......:
; Related .......:
; Link ..........; http://msdn.microsoft.com/en-us/library/aa384117(VS.85).aspx
; Example .......; Yes
;
;==========================================================================================
Func _WinHttpTimeFromSystemTime()

    Local $SYSTEMTIME = DllStructCreate("ushort Year;" & _
            "ushort Month;" & _
            "ushort DayOfWeek;" & _
            "ushort Day;" & _
            "ushort Hour;" & _
            "ushort Minute;" & _
            "ushort Second;" & _
            "ushort Milliseconds")

    DllCall("kernel32.dll", "none", "GetLocalTime", "ptr", DllStructGetPtr($SYSTEMTIME))

    If @error Then
        Return SetError(1, 0, 0)
    EndIf

    Local $sTime = DllStructCreate("wchar[62]")

    Local $a_iCall = DllCall("winhttp.dll", "int", "WinHttpTimeFromSystemTime", _
            "ptr", DllStructGetPtr($SYSTEMTIME), _
            "ptr", DllStructGetPtr($sTime))

    If @error Or Not $a_iCall[0] Then
        Return SetError(2, 0, 0)
    EndIf

    Return SetError(0, 0, DllStructGetData($sTime, 1))

EndFunc   ;==>_WinHttpTimeFromSystemTime

MsgBox(64, "WinHttp time", _WinHttpTimeFromSystemTime())

but you will have to tweak the output (or use some internal black magic) as it doesn't seem to process the timezone and DST properly (at least on Vista x86.

I just get:

Fri, 06 Apr 2012 02:35:20 GMT

but that should have been:

Fri, 06 Apr 2012 02:35:20 +0200

(I'm in Paris TZ with DST on)