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package org.apache.tomcat.util.buf;
import java.io.IOException;
import java.io.OutputStream;
import java.util.*;
import java.text.*;
import org.apache.tomcat.util.res.StringManager;
/**
* Common place for date utils.
*
* @deprecated Will be replaced with a more efficient impl, based on
* FastDateFormat, with an API using less objects.
* @author [email protected]
* @author Jason Hunter [[email protected]]
* @author James Todd [[email protected]]
* @author Costin Manolache
*/
public class DateTool {
/** US locale - all HTTP dates are in english
*/
private final static Locale LOCALE_US = Locale.US;
/** GMT timezone - all HTTP dates are on GMT
*/
public final static TimeZone GMT_ZONE = TimeZone.getTimeZone("GMT");
/** format for RFC 1123 date string -- "Sun, 06 Nov 1994 08:49:37 GMT"
*/
public final static String RFC1123_PATTERN =
"EEE, dd MMM yyyy HH:mm:ss z";
// format for RFC 1036 date string -- "Sunday, 06-Nov-94 08:49:37 GMT"
public final static String rfc1036Pattern =
"EEEEEEEEE, dd-MMM-yy HH:mm:ss z";
// format for C asctime() date string -- "Sun Nov 6 08:49:37 1994"
public final static String asctimePattern =
"EEE MMM d HH:mm:ss yyyy";
/** Pattern used for old cookies
*/
private final static String OLD_COOKIE_PATTERN = "EEE, dd-MMM-yyyy HH:mm:ss z";
/** DateFormat to be used to format dates. Called from MessageBytes
*/
private final static DateFormat rfc1123Format =
new SimpleDateFormat(RFC1123_PATTERN, LOCALE_US);
/** DateFormat to be used to format old netscape cookies
Called from ServerCookie
*/
private final static DateFormat oldCookieFormat =
new SimpleDateFormat(OLD_COOKIE_PATTERN, LOCALE_US);
private final static DateFormat rfc1036Format =
new SimpleDateFormat(rfc1036Pattern, LOCALE_US);
private final static DateFormat asctimeFormat =
new SimpleDateFormat(asctimePattern, LOCALE_US);
static {
rfc1123Format.setTimeZone(GMT_ZONE);
oldCookieFormat.setTimeZone(GMT_ZONE);
rfc1036Format.setTimeZone(GMT_ZONE);
asctimeFormat.setTimeZone(GMT_ZONE);
}
private static String rfc1123DS;
private static long rfc1123Sec;
private static StringManager sm =
StringManager.getManager("org.apache.tomcat.util.buf.res");
// Called from MessageBytes.getTime()
static long parseDate( MessageBytes value ) {
return parseDate( value.toString());
}
// Called from MessageBytes.setTime
/**
*/
public static String format1123( Date d ) {
String dstr=null;
synchronized(rfc1123Format) {
dstr = format1123(d, rfc1123Format);
}
return dstr;
}
public static String format1123( Date d,DateFormat df ) {
long dt = d.getTime() / 1000;
if ((rfc1123DS != null) && (dt == rfc1123Sec))
return rfc1123DS;
rfc1123DS = df.format( d );
rfc1123Sec = dt;
return rfc1123DS;
}
// Called from ServerCookie
/**
*/
public static void formatOldCookie( Date d, StringBuffer sb,
FieldPosition fp )
{
synchronized(oldCookieFormat) {
oldCookieFormat.format( d, sb, fp );
}
}
// Called from ServerCookie
public static String formatOldCookie( Date d )
{
String ocf=null;
synchronized(oldCookieFormat) {
ocf= oldCookieFormat.format( d );
}
return ocf;
}
/** Called from HttpServletRequest.getDateHeader().
Not efficient - but not very used.
*/
public static long parseDate( String dateString ) {
DateFormat [] format = {rfc1123Format,rfc1036Format,asctimeFormat};
return parseDate(dateString,format);
}
public static long parseDate( String dateString, DateFormat []format ) {
Date date=null;
for(int i=0; i < format.length; i++) {
try {
date = format[i].parse(dateString);
return date.getTime();
} catch (ParseException e) { }
catch (StringIndexOutOfBoundsException e) { }
}
String msg = sm.getString("httpDate.pe", dateString);
throw new IllegalArgumentException(msg);
}
}
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