/// <summary>
/// Parses RFC 2822 date-time from the specified value.
/// </summary>
/// <param name="value">RFC 2822 date-time string value.</param>
/// <returns>Returns parsed datetime value.</returns>
/// <exception cref="ArgumentNullException">Is raised when <b>value</b> is null.</exception>
/// <exception cref="ArgumentException">Is raised when any of the arguments has invalid value.</exception>
public static DateTime ParseRfc2822DateTime(string value)
{
if(value == null){
throw new ArgumentNullException(value);
}
/* RFC 2822 3.
* date-time = [ day-of-week "," ] date FWS time [CFWS]
* day-of-week = ([FWS] day-name) / obs-day-of-week
* day-name = "Mon" / "Tue" / "Wed" / "Thu" / "Fri" / "Sat" / "Sun"
* date = day month year
* year = 4*DIGIT / obs-year
* month = (FWS month-name FWS) / obs-month
* month-name = "Jan" / "Feb" / "Mar" / "Apr" / "May" / "Jun" / "Jul" / "Aug" / "Sep" / "Oct" / "Nov" / "Dec"
* day = ([FWS] 1*2DIGIT) / obs-day
* time = time-of-day FWS zone
* time-of-day = hour ":" minute [ ":" second ]
* hour = 2DIGIT / obs-hour
* minute = 2DIGIT / obs-minute
* second = 2DIGIT / obs-second
* zone = (( "+" / "-" ) 4DIGIT) / obs-zone
*
* The date and time-of-day SHOULD express local time.
*/
try{
MimeReader r = new MimeReader(value);
string v = r.Atom();
// Skip optional [ day-of-week "," ] and read "day".
if(v.Length == 3){
r.Char(true);
v = r.Atom();
}
int day = Convert.ToInt32(v);
v = r.Atom().ToLower();
int month = 1;
if(v == "jan"){
month = 1;
}
else if(v == "feb"){
month = 2;
}
else if(v == "mar"){
month = 3;
}
else if(v == "apr"){
month = 4;
}
else if(v == "may"){
month = 5;
}
else if(v == "jun"){
month = 6;
}
else if(v == "jul"){
month = 7;
}
else if(v == "aug"){
month = 8;
}
else if(v == "sep"){
month = 9;
}
else if(v == "oct"){
month = 10;
}
else if(v == "nov"){
month = 11;
}
else if(v == "dec"){
month = 12;
}
else{
throw new ArgumentException("Invalid month-name value '" + value + "'.");
}
int year = Convert.ToInt32(r.Atom());
int hour = Convert.ToInt32(r.Atom());
r.Char(true);
int minute = Convert.ToInt32(r.Atom());
int second = 0;
// We have optional "second".
if(r.Peek(true) == ':'){
r.Char(true);
second = Convert.ToInt32(r.Atom());
}
int timeZoneMinutes = 0;
v = r.Atom();
// Time zone missing. Not RFC syntax, but some servers will send such dates.
if(v == null){
// Just consider time zone as 0(GMT).
}
// We have RFC 2822 date. For example: +2000.
else if(v[0] == '+' || v[0] == '-'){
if(v[0] == '+'){
timeZoneMinutes = (Convert.ToInt32(v.Substring(1,2)) * 60 + Convert.ToInt32(v.Substring(3,2)));
}
else{
timeZoneMinutes = -(Convert.ToInt32(v.Substring(1,2)) * 60 + Convert.ToInt32(v.Substring(3,2)));
}
}
// We have RFC 822 date with abbrevated time zone name. For example: GMT.
else{
v = v.ToUpper();
#region time zones
// Alpha Time Zone (military).
if(v == "A"){
timeZoneMinutes = ((01 * 60) + 00);
}
// Australian Central Daylight Time.
else if(v == "ACDT"){
timeZoneMinutes = ((10 * 60) + 30);
}
// Australian Central Standard Time.
else if(v == "ACST"){
timeZoneMinutes = ((09 * 60) + 30);
}
// Atlantic Daylight Time.
else if(v == "ADT"){
timeZoneMinutes = -((03 * 60) + 00);
}
// Australian Eastern Daylight Time.
else if(v == "AEDT"){
timeZoneMinutes = ((11 * 60) + 00);
}
// Australian Eastern Standard Time.
else if(v == "AEST"){
timeZoneMinutes = ((10 * 60) + 00);
}
// Alaska Daylight Time.
else if(v == "AKDT"){
timeZoneMinutes = -((08 * 60) + 00);
}
// Alaska Standard Time.
else if(v == "AKST"){
timeZoneMinutes = -((09 * 60) + 00);
}
// Atlantic Standard Time.
else if(v == "AST"){
timeZoneMinutes = -((04 * 60) + 00);
}
// Australian Western Daylight Time.
else if(v == "AWDT"){
timeZoneMinutes = ((09 * 60) + 00);
}
// Australian Western Standard Time.
else if(v == "AWST"){
timeZoneMinutes = ((08 * 60) + 00);
}
// Bravo Time Zone (millitary).
else if(v == "B"){
timeZoneMinutes = ((02 * 60) + 00);
}
// British Summer Time.
else if(v == "BST"){
timeZoneMinutes = ((01 * 60) + 00);
}
// Charlie Time Zone (millitary).
else if(v == "C"){
timeZoneMinutes = ((03 * 60) + 00);
}
// Central Daylight Time.
else if(v == "CDT"){
timeZoneMinutes = -((05 * 60) + 00);
}
// Central European Daylight Time.
else if(v == "CEDT"){
timeZoneMinutes = ((02 * 60) + 00);
}
// Central European Summer Time.
else if(v == "CEST"){
timeZoneMinutes = ((02 * 60) + 00);
}
// Central European Time.
else if(v == "CET"){
timeZoneMinutes = ((01 * 60) + 00);
}
// Central Standard Time.
else if(v == "CST"){
timeZoneMinutes = -((06 * 60) + 00);
}
// Christmas Island Time.
else if(v == "CXT"){
timeZoneMinutes = ((01 * 60) + 00);
}
// Delta Time Zone (military).
else if(v == "D"){
timeZoneMinutes = ((04 * 60) + 00);
}
// Echo Time Zone (military).
else if(v == "E"){
timeZoneMinutes = ((05 * 60) + 00);
}
// Eastern Daylight Time.
else if(v == "EDT"){
timeZoneMinutes = -((04 * 60) + 00);
}
// Eastern European Daylight Time.
else if(v == "EEDT"){
timeZoneMinutes = ((03 * 60) + 00);
}
// Eastern European Summer Time.
else if(v == "EEST"){
timeZoneMinutes = ((03 * 60) + 00);
}
// Eastern European Time.
else if(v == "EET"){
timeZoneMinutes = ((02 * 60) + 00);
}
// Eastern Standard Time.
else if(v == "EST"){
timeZoneMinutes = -((05 * 60) + 00);
}
// Foxtrot Time Zone (military).
else if(v == "F"){
timeZoneMinutes = (06 * 60 + 00);
}
// Golf Time Zone (military).
else if(v == "G"){
timeZoneMinutes = ((07 * 60) + 00);
}
// Greenwich Mean Time.
else if(v == "GMT"){
timeZoneMinutes = 0000;
}
// Hotel Time Zone (military).
else if(v == "H"){
timeZoneMinutes = ((08 * 60) + 00);
}
// India Time Zone (military).
else if(v == "I"){
timeZoneMinutes = ((09 * 60) + 00);
}
// Irish Summer Time.
else if(v == "IST"){
timeZoneMinutes = ((01 * 60) + 00);
}
// Kilo Time Zone (millitary).
else if(v == "K"){
timeZoneMinutes = ((10 * 60) + 00);
}
// Lima Time Zone (millitary).
else if(v == "L"){
timeZoneMinutes = ((11 * 60) + 00);
}
// Mike Time Zone (millitary).
else if(v == "M"){
timeZoneMinutes = ((12 * 60) + 00);
}
// Mountain Daylight Time.
else if(v == "MDT"){
timeZoneMinutes = -((06 * 60) + 00);
}
// Mountain Standard Time.
else if(v == "MST"){
timeZoneMinutes = -((07 * 60) + 00);
}
// November Time Zone (military).
else if(v == "N"){
timeZoneMinutes = -((01 * 60) + 00);
}
// Newfoundland Daylight Time.
else if(v == "NDT"){
timeZoneMinutes = -((02 * 60) + 30);
}
// Norfolk (Island) Time.
else if(v == "NFT"){
timeZoneMinutes = ((11 * 60) + 30);
}
// Newfoundland Standard Time.
else if(v == "NST"){
timeZoneMinutes = -((03 * 60) + 30);
}
// Oscar Time Zone (military).
else if(v == "O"){
timeZoneMinutes = -((02 * 60) + 00);
}
// Papa Time Zone (military).
else if(v == "P"){
timeZoneMinutes = -((03 * 60) + 00);
}
// Pacific Daylight Time.
else if(v == "PDT"){
timeZoneMinutes = -((07 * 60) + 00);
}
// Pacific Standard Time.
else if(v == "PST"){
timeZoneMinutes = -((08 * 60) + 00);
}
// Quebec Time Zone (military).
else if(v == "Q"){
timeZoneMinutes = -((04 * 60) + 00);
}
// Romeo Time Zone (military).
else if(v == "R"){
timeZoneMinutes = -((05 * 60) + 00);
}
// Sierra Time Zone (military).
else if(v == "S"){
timeZoneMinutes = -((06 * 60) + 00);
}
// Tango Time Zone (military).
else if(v == "T"){
timeZoneMinutes = -((07 * 60) + 00);
}
// Uniform Time Zone (military).
else if(v == ""){
timeZoneMinutes = -((08 * 60) + 00);
}
// Coordinated Universal Time.
else if(v == "UTC"){
timeZoneMinutes = 0000;
}
// Victor Time Zone (militray).
else if(v == "V"){
timeZoneMinutes = -((09 * 60) + 00);
}
// Whiskey Time Zone (military).
else if(v == "W"){
timeZoneMinutes = -((10 * 60) + 00);
}
// Western European Daylight Time.
else if(v == "WEDT"){
timeZoneMinutes = ((01 * 60) + 00);
}
// Western European Summer Time.
else if(v == "WEST"){
timeZoneMinutes = ((01 * 60) + 00);
}
// Western European Time.
else if(v == "WET"){
timeZoneMinutes = 0000;
}
// Western Standard Time.
else if(v == "WST"){
timeZoneMinutes = ((08 * 60) + 00);
}
// X-ray Time Zone (military).
else if(v == "X"){
timeZoneMinutes = -((11 * 60) + 00);
}
// Yankee Time Zone (military).
else if(v == "Y"){
timeZoneMinutes = -((12 * 60) + 00);
}
// Zulu Time Zone (military).
else if(v == "Z"){
timeZoneMinutes = 0000;
}
#endregion
}
// Convert time to UTC and then back to local.
DateTime timeUTC = new DateTime(year,month,day,hour,minute,second).AddMinutes(-(timeZoneMinutes));
return new DateTime(timeUTC.Year,timeUTC.Month,timeUTC.Day,timeUTC.Hour,timeUTC.Minute,timeUTC.Second,DateTimeKind.Utc).ToLocalTime();
}
catch(Exception x){
string dymmy = x.Message;
throw new ArgumentException("Argumnet 'value' value '" + value + "' is not valid RFC 822/2822 date-time string.");
}
}
/// <summary>
/// Parses RFC 2822 date-time from the specified value.
/// </summary>
/// <param name="value">RFC 2822 date-time string value.</param>
/// <returns>Returns parsed datetime value.</returns>
/// <exception cref="ArgumentNullException">Is raised when <b>value</b> is null.</exception>
/// <exception cref="ArgumentException">Is raised when any of the arguments has invalid value.</exception>
public static DateTime ParseRfc2822DateTime(string value)
{
if (value == null)
{
throw new ArgumentNullException(value);
}
/* RFC 2822 3.
* date-time = [ day-of-week "," ] date FWS time [CFWS]
* day-of-week = ([FWS] day-name) / obs-day-of-week
* day-name = "Mon" / "Tue" / "Wed" / "Thu" / "Fri" / "Sat" / "Sun"
* date = day month year
* year = 4*DIGIT / obs-year
* month = (FWS month-name FWS) / obs-month
* month-name = "Jan" / "Feb" / "Mar" / "Apr" / "May" / "Jun" / "Jul" / "Aug" / "Sep" / "Oct" / "Nov" / "Dec"
* day = ([FWS] 1*2DIGIT) / obs-day
* time = time-of-day FWS zone
* time-of-day = hour ":" minute [ ":" second ]
* hour = 2DIGIT / obs-hour
* minute = 2DIGIT / obs-minute
* second = 2DIGIT / obs-second
* zone = (( "+" / "-" ) 4DIGIT) / obs-zone
*
* The date and time-of-day SHOULD express local time.
*/
try{
MimeReader r = new MimeReader(value);
string v = r.Atom();
// Skip optional [ day-of-week "," ] and read "day".
if (v.Length == 3)
{
r.Char(true);
v = r.Atom();
}
int day = Convert.ToInt32(v);
v = r.Atom().ToLower();
int month = 1;
if (v == "jan")
{
month = 1;
}
else if (v == "feb")
{
month = 2;
}
else if (v == "mar")
{
month = 3;
}
else if (v == "apr")
{
month = 4;
}
else if (v == "may")
{
month = 5;
}
else if (v == "jun")
{
month = 6;
}
else if (v == "jul")
{
month = 7;
}
else if (v == "aug")
{
month = 8;
}
else if (v == "sep")
{
month = 9;
}
else if (v == "oct")
{
month = 10;
}
else if (v == "nov")
{
month = 11;
}
else if (v == "dec")
{
month = 12;
}
else
{
throw new ArgumentException("Invalid month-name value '" + value + "'.");
}
int year = Convert.ToInt32(r.Atom());
int hour = Convert.ToInt32(r.Atom());
r.Char(true);
int minute = Convert.ToInt32(r.Atom());
int second = 0;
// We have optional "second".
if (r.Peek(true) == ':')
{
r.Char(true);
second = Convert.ToInt32(r.Atom());
}
int timeZoneMinutes = 0;
v = r.Atom();
// Time zone missing. Not RFC syntax, but some servers will send such dates.
if (v == null)
{
// Just consider time zone as 0(GMT).
}
// We have RFC 2822 date. For example: +2000.
else if (v[0] == '+' || v[0] == '-')
{
if (v[0] == '+')
{
timeZoneMinutes = (Convert.ToInt32(v.Substring(1, 2)) * 60 + Convert.ToInt32(v.Substring(3, 2)));
}
else
{
timeZoneMinutes = -(Convert.ToInt32(v.Substring(1, 2)) * 60 + Convert.ToInt32(v.Substring(3, 2)));
}
}
// We have RFC 822 date with abbrevated time zone name. For example: GMT.
else
{
v = v.ToUpper();
#region time zones
// Alpha Time Zone (military).
if (v == "A")
{
timeZoneMinutes = ((01 * 60) + 00);
}
// Australian Central Daylight Time.
else if (v == "ACDT")
{
timeZoneMinutes = ((10 * 60) + 30);
}
// Australian Central Standard Time.
else if (v == "ACST")
{
timeZoneMinutes = ((09 * 60) + 30);
}
// Atlantic Daylight Time.
else if (v == "ADT")
{
timeZoneMinutes = -((03 * 60) + 00);
}
// Australian Eastern Daylight Time.
else if (v == "AEDT")
{
timeZoneMinutes = ((11 * 60) + 00);
}
// Australian Eastern Standard Time.
else if (v == "AEST")
{
timeZoneMinutes = ((10 * 60) + 00);
}
// Alaska Daylight Time.
else if (v == "AKDT")
{
timeZoneMinutes = -((08 * 60) + 00);
}
// Alaska Standard Time.
else if (v == "AKST")
{
timeZoneMinutes = -((09 * 60) + 00);
}
// Atlantic Standard Time.
else if (v == "AST")
{
timeZoneMinutes = -((04 * 60) + 00);
}
// Australian Western Daylight Time.
else if (v == "AWDT")
{
timeZoneMinutes = ((09 * 60) + 00);
}
// Australian Western Standard Time.
else if (v == "AWST")
{
timeZoneMinutes = ((08 * 60) + 00);
}
// Bravo Time Zone (millitary).
else if (v == "B")
{
timeZoneMinutes = ((02 * 60) + 00);
}
// British Summer Time.
else if (v == "BST")
{
timeZoneMinutes = ((01 * 60) + 00);
}
// Charlie Time Zone (millitary).
else if (v == "C")
{
timeZoneMinutes = ((03 * 60) + 00);
}
// Central Daylight Time.
else if (v == "CDT")
{
timeZoneMinutes = -((05 * 60) + 00);
}
// Central European Daylight Time.
else if (v == "CEDT")
{
timeZoneMinutes = ((02 * 60) + 00);
}
// Central European Summer Time.
else if (v == "CEST")
{
timeZoneMinutes = ((02 * 60) + 00);
}
// Central European Time.
else if (v == "CET")
{
timeZoneMinutes = ((01 * 60) + 00);
}
// Central Standard Time.
else if (v == "CST")
{
timeZoneMinutes = -((06 * 60) + 00);
}
// Christmas Island Time.
else if (v == "CXT")
{
timeZoneMinutes = ((01 * 60) + 00);
}
// Delta Time Zone (military).
else if (v == "D")
{
timeZoneMinutes = ((04 * 60) + 00);
}
// Echo Time Zone (military).
else if (v == "E")
{
timeZoneMinutes = ((05 * 60) + 00);
}
// Eastern Daylight Time.
else if (v == "EDT")
{
timeZoneMinutes = -((04 * 60) + 00);
}
// Eastern European Daylight Time.
else if (v == "EEDT")
{
timeZoneMinutes = ((03 * 60) + 00);
}
// Eastern European Summer Time.
else if (v == "EEST")
{
timeZoneMinutes = ((03 * 60) + 00);
}
// Eastern European Time.
else if (v == "EET")
{
timeZoneMinutes = ((02 * 60) + 00);
}
// Eastern Standard Time.
else if (v == "EST")
{
timeZoneMinutes = -((05 * 60) + 00);
}
// Foxtrot Time Zone (military).
else if (v == "F")
{
timeZoneMinutes = (06 * 60 + 00);
}
// Golf Time Zone (military).
else if (v == "G")
{
timeZoneMinutes = ((07 * 60) + 00);
}
// Greenwich Mean Time.
else if (v == "GMT")
{
timeZoneMinutes = 0000;
}
// Hotel Time Zone (military).
else if (v == "H")
{
timeZoneMinutes = ((08 * 60) + 00);
}
// India Time Zone (military).
else if (v == "I")
{
timeZoneMinutes = ((09 * 60) + 00);
}
// Irish Summer Time.
else if (v == "IST")
{
timeZoneMinutes = ((01 * 60) + 00);
}
// Kilo Time Zone (millitary).
else if (v == "K")
{
timeZoneMinutes = ((10 * 60) + 00);
}
// Lima Time Zone (millitary).
else if (v == "L")
{
timeZoneMinutes = ((11 * 60) + 00);
}
// Mike Time Zone (millitary).
else if (v == "M")
{
timeZoneMinutes = ((12 * 60) + 00);
}
// Mountain Daylight Time.
else if (v == "MDT")
{
timeZoneMinutes = -((06 * 60) + 00);
}
// Mountain Standard Time.
else if (v == "MST")
{
timeZoneMinutes = -((07 * 60) + 00);
}
// November Time Zone (military).
else if (v == "N")
{
timeZoneMinutes = -((01 * 60) + 00);
}
// Newfoundland Daylight Time.
else if (v == "NDT")
{
timeZoneMinutes = -((02 * 60) + 30);
}
// Norfolk (Island) Time.
else if (v == "NFT")
{
timeZoneMinutes = ((11 * 60) + 30);
}
// Newfoundland Standard Time.
else if (v == "NST")
{
timeZoneMinutes = -((03 * 60) + 30);
}
// Oscar Time Zone (military).
else if (v == "O")
{
timeZoneMinutes = -((02 * 60) + 00);
}
// Papa Time Zone (military).
else if (v == "P")
{
timeZoneMinutes = -((03 * 60) + 00);
}
// Pacific Daylight Time.
else if (v == "PDT")
{
timeZoneMinutes = -((07 * 60) + 00);
}
// Pacific Standard Time.
else if (v == "PST")
{
timeZoneMinutes = -((08 * 60) + 00);
}
// Quebec Time Zone (military).
else if (v == "Q")
{
timeZoneMinutes = -((04 * 60) + 00);
}
// Romeo Time Zone (military).
else if (v == "R")
{
timeZoneMinutes = -((05 * 60) + 00);
}
// Sierra Time Zone (military).
else if (v == "S")
{
timeZoneMinutes = -((06 * 60) + 00);
}
// Tango Time Zone (military).
else if (v == "T")
{
timeZoneMinutes = -((07 * 60) + 00);
}
// Uniform Time Zone (military).
else if (v == "")
{
timeZoneMinutes = -((08 * 60) + 00);
}
// Coordinated Universal Time.
else if (v == "UTC")
{
timeZoneMinutes = 0000;
}
// Victor Time Zone (militray).
else if (v == "V")
{
timeZoneMinutes = -((09 * 60) + 00);
}
// Whiskey Time Zone (military).
else if (v == "W")
{
timeZoneMinutes = -((10 * 60) + 00);
}
// Western European Daylight Time.
else if (v == "WEDT")
{
timeZoneMinutes = ((01 * 60) + 00);
}
// Western European Summer Time.
else if (v == "WEST")
{
timeZoneMinutes = ((01 * 60) + 00);
}
// Western European Time.
else if (v == "WET")
{
timeZoneMinutes = 0000;
}
// Western Standard Time.
else if (v == "WST")
{
timeZoneMinutes = ((08 * 60) + 00);
}
// X-ray Time Zone (military).
else if (v == "X")
{
timeZoneMinutes = -((11 * 60) + 00);
}
// Yankee Time Zone (military).
else if (v == "Y")
{
timeZoneMinutes = -((12 * 60) + 00);
}
// Zulu Time Zone (military).
else if (v == "Z")
{
timeZoneMinutes = 0000;
}
#endregion
}
// Convert time to UTC and then back to local.
DateTime timeUTC = new DateTime(year, month, day, hour, minute, second).AddMinutes(-(timeZoneMinutes));
return(new DateTime(timeUTC.Year, timeUTC.Month, timeUTC.Day, timeUTC.Hour, timeUTC.Minute, timeUTC.Second, DateTimeKind.Utc).ToLocalTime());
}
catch (Exception x) {
string dymmy = x.Message;
throw new ArgumentException("Argumnet 'value' value '" + value + "' is not valid RFC 822/2822 date-time string.");
}
}
