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package org.jboss.resteasy.plugins.delegates;
import java.io.Serializable;
import java.text.DateFormat;
import java.text.FieldPosition;
import java.text.SimpleDateFormat;
import java.util.Date;
import java.util.Locale;
import java.util.TimeZone;
import org.jboss.resteasy.resteasy_jaxrs.i18n.Messages;
/**
* Server-side cookie representation. Stolen from Tomcat.
*/
public class ServerCookie implements Serializable
{
private static final String tspecials = ",; ";
private static final String tspecials2 = "()<>@,;:\\\"/[]?={} \t";
/*
* Tests a string and returns true if the string counts as a
* reserved token in the Java language.
*
* @param value the String to be tested
*
* @return true if the String is a reserved
* token; false if it is not
*/
public static boolean isToken(String value)
{
if (value == null) return true;
int len = value.length();
for (int i = 0; i < len; i++)
{
char c = value.charAt(i);
if (tspecials.indexOf(c) != -1)
return false;
}
return true;
}
public static boolean containsCTL(String value, int version)
{
if (value == null) return false;
int len = value.length();
for (int i = 0; i < len; i++)
{
char c = value.charAt(i);
if (c < 0x20 || c >= 0x7f)
{
if (c == 0x09)
continue; //allow horizontal tabs
return true;
}
}
return false;
}
public static boolean isToken2(String value)
{
if (value == null) return true;
int len = value.length();
for (int i = 0; i < len; i++)
{
char c = value.charAt(i);
if (tspecials2.indexOf(c) != -1)
return false;
}
return true;
}
/**
* @deprecated Not used: Deprecated in the original org.apache.tomcat.util.http.ServerCookie class.
* @param name name
* @return boolean flag
*/
public static boolean checkName(String name)
{
if (!isToken(name)
|| name.equalsIgnoreCase("Comment") // rfc2019
|| name.equalsIgnoreCase("Discard") // rfc2965
|| name.equalsIgnoreCase("Domain") // rfc2019
|| name.equalsIgnoreCase("Expires") // Netscape
|| name.equalsIgnoreCase("Max-Age") // rfc2019
|| name.equalsIgnoreCase("Path") // rfc2019
|| name.equalsIgnoreCase("Secure") // rfc2019
|| name.equalsIgnoreCase("Version") // rfc2019
// TODO remaining RFC2965 attributes
)
{
return false;
}
return true;
}
// -------------------- Cookie parsing tools
/**
* Return the header name to set the cookie, based on cookie version.
* @param version cookie version
* @return cookie header name
*/
public static String getCookieHeaderName(int version)
{
// TODO Re-enable logging when RFC2965 is implemented
// log( (version==1) ? "Set-Cookie2" : "Set-Cookie");
if (version == 1)
{
// XXX RFC2965 not referenced in Servlet Spec
// Set-Cookie2 is not supported by Netscape 4, 6, IE 3, 5
// Set-Cookie2 is supported by Lynx and Opera
// Need to check on later IE and FF releases but for now...
// RFC2109
return "Set-Cookie";
// return "Set-Cookie2";
}
else
{
// Old Netscape
return "Set-Cookie";
}
}
/**
* US locale - all HTTP dates are in english
*/
private static final Locale LOCALE_US = Locale.US;
/**
* GMT timezone - all HTTP dates are on GMT
*/
public static final TimeZone GMT_ZONE = TimeZone.getTimeZone("GMT");
/**
* Pattern used for old cookies
*/
private static final String OLD_COOKIE_PATTERN = "EEE, dd-MMM-yyyy HH:mm:ss z";
private static final DateFormat oldCookieFormat = new SimpleDateFormat(OLD_COOKIE_PATTERN, LOCALE_US);
public static String formatOldCookie(Date d)
{
String ocf = null;
synchronized (oldCookieFormat)
{
ocf = oldCookieFormat.format(d);
}
return ocf;
}
public static void formatOldCookie(Date d, StringBuffer sb,
FieldPosition fp)
{
synchronized (oldCookieFormat)
{
oldCookieFormat.format(d, sb, fp);
}
}
private static final String ancientDate = formatOldCookie(new Date(10000));
// TODO RFC2965 fields also need to be passed
public static void appendCookieValue(StringBuffer headerBuf,
int version,
String name,
String value,
String path,
String domain,
String comment,
int maxAge,
boolean isSecure)
{
StringBuffer buf = new StringBuffer();
// Servlet implementation checks name
buf.append(name);
buf.append("=");
// Servlet implementation does not check anything else
maybeQuote2(version, buf, value);
// Add version 1 specific information
if (version == 1)
{
// Version=1 ... required
buf.append("; Version=1");
// Comment=comment
if (comment != null)
{
buf.append("; Comment=");
maybeQuote2(version, buf, comment);
}
}
// Add domain information, if present
if (domain != null)
{
buf.append("; Domain=");
maybeQuote2(version, buf, domain);
}
// Max-Age=secs ... or use old "Expires" format
// TODO RFC2965 Discard
if (maxAge >= 0)
{
if (version == 0)
{
// Wdy, DD-Mon-YY HH:MM:SS GMT ( Expires Netscape format )
buf.append("; Expires=");
// To expire immediately we need to set the time in past
if (maxAge == 0)
buf.append(ancientDate);
else
formatOldCookie
(new Date(System.currentTimeMillis() +
maxAge * 1000L), buf,
new FieldPosition(0));
}
else
{
buf.append("; Max-Age=");
buf.append(maxAge);
}
}
// Path=path
if (path != null)
{
buf.append("; Path=");
maybeQuote2(version, buf, path);
}
// Secure
if (isSecure)
{
buf.append("; Secure");
}
headerBuf.append(buf);
}
/**
* @deprecated Not used: Deprecated in the original org.apache.tomcat.util.http.ServerCookie class.
* @param version version
* @param buf buffer
* @param value value
*/
@Deprecated
public static void maybeQuote(int version, StringBuffer buf, String value)
{
// special case - a \n or \r shouldn't happen in any case
if (isToken(value))
{
buf.append(value);
}
else
{
buf.append('"');
buf.append(escapeDoubleQuotes(value, 0, value.length()));
buf.append('"');
}
}
public static boolean alreadyQuoted(String value)
{
if (value == null || value.length() == 0) return false;
return (value.charAt(0) == '\"' && value.charAt(value.length() - 1) == '\"');
}
/**
* Quotes values using rules that vary depending on Cookie version.
*
* @param version cookie version
* @param buf buffer
* @param value value
*/
public static void maybeQuote2(int version, StringBuffer buf, String value)
{
if (value == null || value.length() == 0)
{
buf.append("\"\"");
}
else if (containsCTL(value, version))
throw new IllegalArgumentException(Messages.MESSAGES.controlCharacterInCookieValue());
else if (alreadyQuoted(value))
{
buf.append('"');
buf.append(escapeDoubleQuotes(value, 1, value.length() - 1));
buf.append('"');
}
else if (version == 0 && !isToken(value))
{
buf.append('"');
buf.append(escapeDoubleQuotes(value, 0, value.length()));
buf.append('"');
}
else if (version == 1 && !isToken2(value))
{
buf.append('"');
buf.append(escapeDoubleQuotes(value, 0, value.length()));
buf.append('"');
}
else
{
buf.append(value);
}
}
/**
* Escapes any double quotes in the given string.
*
* @param s the input string
* @param beginIndex start index inclusive
* @param endIndex exclusive
* @return The (possibly) escaped string
*/
private static String escapeDoubleQuotes(String s, int beginIndex, int endIndex)
{
if (s == null || s.length() == 0 || s.indexOf('"') == -1)
{
return s;
}
StringBuffer b = new StringBuffer();
for (int i = beginIndex; i < endIndex; i++)
{
char c = s.charAt(i);
if (c == '\\')
{
b.append(c);
//ignore the character after an escape, just append it
if (++i >= endIndex) throw new IllegalArgumentException(Messages.MESSAGES.invalidEscapeCharacterInCookieValue());
b.append(s.charAt(i));
}
else if (c == '"')
b.append('\\').append('"');
else
b.append(c);
}
return b.toString();
}
}
