/*
* @(#)HttpCookie.java 1.5 05/11/17
*
* Copyright 2006 Sun Microsystems, Inc. All rights reserved.
* SUN PROPRIETARY/CONFIDENTIAL. Use is subject to license terms.
*/
package java.net;
import java.util.List;
import java.util.StringTokenizer;
import java.util.NoSuchElementException;
import java.text.SimpleDateFormat;
import java.util.TimeZone;
import java.util.Date;
import java.lang.NullPointerException; // for javadoc
/**
* An HttpCookie object represents an http cookie, which carries state
* information between server and user agent. Cookie is widely adopted
* to create stateful sessions.
*
* <p>There are 3 http cookie specifications:
* <blockquote>
* Netscape draft<br>
* RFC 2109 - <a href="http://www.ietf.org/rfc/rfc2109.txt">
* <i>http://www.ietf.org/rfc/rfc2109.txt</i></a><br>
* RFC 2965 - <a href="http://www.ietf.org/rfc/rfc2965.txt">
* <i>http://www.ietf.org/rfc/rfc2965.txt</i></a>
* </blockquote>
*
* <p>HttpCookie class can accept all these 3 forms of syntax.
*
* @version 1.5, 05/11/17
* @author Edward Wang
* @since 1.6
*/
public final class HttpCookie implements Cloneable {
/* ---------------- Fields -------------- */
//
// The value of the cookie itself.
//
private String name; // NAME= ... "$Name" style is reserved
private String value; // value of NAME
//
// Attributes encoded in the header's cookie fields.
//
private String comment; // Comment=VALUE ... describes cookie's use
private String commentURL; // CommentURL="http URL" ... describes cookie's use
private boolean toDiscard; // Discard ... discard cookie unconditionally
private String domain; // Domain=VALUE ... domain that sees cookie
private long maxAge = MAX_AGE_UNSPECIFIED; // Max-Age=VALUE ... cookies auto-expire
private String path; // Path=VALUE ... URLs that see the cookie
private String portlist; // Port[="portlist"] ... the port cookie may be returned to
private boolean secure; // Secure ... e.g. use SSL
private int version = 1; // Version=1 ... RFC 2965 style
//
// Hold the creation time (in seconds) of the http cookie for later
// expiration calculation
//
private long whenCreated = 0;
//
// Since the positive and zero max-age have their meanings,
// this value serves as a hint as 'not specify max-age'
//
private final static long MAX_AGE_UNSPECIFIED = -1;
//
// date format used by Netscape's cookie draft
//
private final static String NETSCAPE_COOKIE_DATE_FORMAT = "EEE',' dd-MMM-yyyy HH:mm:ss 'GMT'";
//
// constant strings represent set-cookie header token
//
private final static String SET_COOKIE = "set-cookie:";
private final static String SET_COOKIE2 = "set-cookie2:";
/* ---------------- Ctors -------------- */
/**
* Constructs a cookie with a specified name and value.
*
* <p>The name must conform to RFC 2965. That means it can contain
* only ASCII alphanumeric characters and cannot contain commas,
* semicolons, or white space or begin with a $ character. The cookie's
* name cannot be changed after creation.
*
* <p>The value can be anything the server chooses to send. Its
* value is probably of interest only to the server. The cookie's
* value can be changed after creation with the
* <code>setValue</code> method.
*
* <p>By default, cookies are created according to the RFC 2965
* cookie specification. The version can be changed with the
* <code>setVersion</code> method.
*
*
* @param name a <code>String</code> specifying the name of the cookie
*
* @param value a <code>String</code> specifying the value of the cookie
*
* @throws IllegalArgumentException if the cookie name contains illegal characters
* or it is one of the tokens reserved for use
* by the cookie protocol
* @throws NullPointerException if <tt>name</tt> is <tt>null</tt>
* @see #setValue
* @see #setVersion
*
*/
public HttpCookie(String name, String value) {
name = name.trim();
if (name.length() == 0 || !isToken(name) || isReserved(name)) {
throw new IllegalArgumentException("Illegal cookie name");
}
this.name = name;
this.value = value;
toDiscard = false;
secure = false;
whenCreated = System.currentTimeMillis();
}
/**
* Constructs cookies from set-cookie or set-cookie2 header string.
* RFC 2965 section 3.2.2 set-cookie2 syntax indicates that one header line
* may contain more than one cookie definitions, so this is a static
* utility method instead of another constructor.
*
* @param header a <tt>String</tt> specifying the set-cookie header.
* The header should start with "set-cookie", or "set-cookie2"
* token; or it should have no leading token at all.
* @return a List of cookie parsed from header line string
* @throws IllegalArgumentException if header string violates the cookie
* specification's syntax, or the cookie
* name contains llegal characters, or
* the cookie name is one of the tokens
* reserved for use by the cookie protocol
* @throws NullPointerException if the header string is <tt>null</tt>
*/
public static List<HttpCookie> parse(String header) {
int version = guessCookieVersion(header);
// if header start with set-cookie or set-cookie2, strip it off
if (startsWithIgnoreCase(header, SET_COOKIE2)) {
header = header.substring(SET_COOKIE2.length());
} else if (startsWithIgnoreCase(header, SET_COOKIE)) {
header = header.substring(SET_COOKIE.length());
}
List<HttpCookie> cookies = new java.util.ArrayList<HttpCookie>();
// The Netscape cookie may have a comma in its expires attribute,
// while the comma is the delimiter in rfc 2965/2109 cookie header string.
// so the parse logic is slightly different
if (version == 0) {
// Netscape draft cookie
HttpCookie cookie = parseInternal(header);
cookie.setVersion(0);
cookies.add(cookie);
} else {
// rfc2965/2109 cookie
// if header string contains more than one cookie,
// it'll separate them with comma
List<String> cookieStrings = splitMultiCookies(header);
for (String cookieStr : cookieStrings) {
HttpCookie cookie = parseInternal(cookieStr);
cookie.setVersion(1);
cookies.add(cookie);
}
}
return cookies;
}
/* ---------------- Public operations -------------- */
/**
* Reports whether this http cookie has expired or not.
*
* @return <tt>true</tt> to indicate this http cookie has expired;
* otherwise, <tt>false</tt>
*/
public boolean hasExpired() {
if (maxAge == 0) return true;
// if not specify max-age, this cookie should be
// discarded when user agent is to be closed, but
// it is not expired.
if (maxAge == MAX_AGE_UNSPECIFIED) return false;
long deltaSecond = (System.currentTimeMillis() - whenCreated) / 1000;
if (deltaSecond > maxAge)
return true;
else
return false;
}
/**
*
* Specifies a comment that describes a cookie's purpose.
* The comment is useful if the browser presents the cookie
* to the user. Comments
* are not supported by Netscape Version 0 cookies.
*
* @param purpose a <code>String</code> specifying the comment
* to display to the user
*
* @see #getComment
*
*/
public void setComment(String purpose) {
comment = purpose;
}
/**
* Returns the comment describing the purpose of this cookie, or
* <code>null</code> if the cookie has no comment.
*
* @return a <code>String</code> containing the comment,
* or <code>null</code> if none
*
* @see #setComment
*
*/
public String getComment() {
return comment;
}
/**
*
* Specifies a comment url that describes a cookie's purpose.
* The comment url is useful if the browser presents the cookie
* to the user. Comment url is RFC 2965 only.
*
* @param purpose a <code>String</code> specifying the comment url
* to display to the user
*
* @see #getCommentURL
*
*/
public void setCommentURL(String purpose) {
commentURL = purpose;
}
/**
* Returns the comment url describing the purpose of this cookie, or
* <code>null</code> if the cookie has no comment url.
*
* @return a <code>String</code> containing the comment url,
* or <code>null</code> if none
*
* @see #setCommentURL
*
*/
public String getCommentURL() {
return commentURL;
}
/**
* Specify whether user agent should discard the cookie unconditionally.
* This is RFC 2965 only attribute.
*
* @param discard <tt>true</tt> indicates to discard cookie unconditionally
*
* @see #getDiscard
*/
public void setDiscard(boolean discard) {
toDiscard = discard;
}
/**
* Return the discard attribute of the cookie
*
* @return a <tt>boolean</tt> to represent this cookie's discard attribute
*
* @see #setDiscard
*/
public boolean getDiscard() {
return toDiscard;
}
/**
* Specify the portlist of the cookie, which restricts the port(s)
* to which a cookie may be sent back in a Cookie header.
*
* @param ports a <tt>String</tt> specify the port list, which is
* comma seperated series of digits
* @see #getPortlist
*/
public void setPortlist(String ports) {
portlist = ports;
}
/**
* Return the port list attribute of the cookie
*
* @return a <tt>String</tt> contains the port list
* or <tt>null</tt> if none
* @see #setPortlist
*/
public String getPortlist() {
return portlist;
}
/**
*
* Specifies the domain within which this cookie should be presented.
*
* <p>The form of the domain name is specified by RFC 2965. A domain
* name begins with a dot (<code>.foo.com</code>) and means that
* the cookie is visible to servers in a specified Domain Name System
* (DNS) zone (for example, <code>www.foo.com</code>, but not
* <code>a.b.foo.com</code>). By default, cookies are only returned
* to the server that sent them.
*
*
* @param pattern a <code>String</code> containing the domain name
* within which this cookie is visible;
* form is according to RFC 2965
*
* @see #getDomain
*
*/
public void setDomain(String pattern) {
if (pattern != null)
domain = pattern.toLowerCase();
else
domain = pattern;
}
/**
* Returns the domain name set for this cookie. The form of
* the domain name is set by RFC 2965.
*
* @return a <code>String</code> containing the domain name
*
* @see #setDomain
*
*/
public String getDomain() {
return domain;
}
/**
* Sets the maximum age of the cookie in seconds.
*
* <p>A positive value indicates that the cookie will expire
* after that many seconds have passed. Note that the value is
* the <i>maximum</i> age when the cookie will expire, not the cookie's
* current age.
*
* <p>A negative value means
* that the cookie is not stored persistently and will be deleted
* when the Web browser exits. A zero value causes the cookie
* to be deleted.
*
* @param expiry an integer specifying the maximum age of the
* cookie in seconds; if zero, the cookie
* should be discarded immediately;
* otherwise, the cookie's max age is unspecified.
*
* @see #getMaxAge
*
*/
public void setMaxAge(long expiry) {
maxAge = expiry;
}
/**
* Returns the maximum age of the cookie, specified in seconds.
* By default, <code>-1</code> indicating the cookie will persist
* until browser shutdown.
*
*
* @return an integer specifying the maximum age of the
* cookie in seconds
*
*
* @see #setMaxAge
*
*/
public long getMaxAge() {
return maxAge;
}
/**
* Specifies a path for the cookie
* to which the client should return the cookie.
*
* <p>The cookie is visible to all the pages in the directory
* you specify, and all the pages in that directory's subdirectories.
* A cookie's path must include the servlet that set the cookie,
* for example, <i>/catalog</i>, which makes the cookie
* visible to all directories on the server under <i>/catalog</i>.
*
* <p>Consult RFC 2965 (available on the Internet) for more
* information on setting path names for cookies.
*
*
* @param uri a <code>String</code> specifying a path
*
*
* @see #getPath
*
*/
public void setPath(String uri) {
path = uri;
}
/**
* Returns the path on the server
* to which the browser returns this cookie. The
* cookie is visible to all subpaths on the server.
*
*
* @return a <code>String</code> specifying a path that contains
* a servlet name, for example, <i>/catalog</i>
*
* @see #setPath
*
*/
public String getPath() {
return path;
}
/**
* Indicates to the browser whether the cookie should only be sent
* using a secure protocol, such as HTTPS or SSL.
*
* <p>The default value is <code>false</code>.
*
* @param flag if <code>true</code>, sends the cookie from the browser
* to the server using only when using a secure protocol;
* if <code>false</code>, sent on any protocol
*
* @see #getSecure
*
*/
public void setSecure(boolean flag) {
secure = flag;
}
/**
* Returns <code>true</code> if the browser is sending cookies
* only over a secure protocol, or <code>false</code> if the
* browser can send cookies using any protocol.
*
* @return <code>true</code> if the browser can use
* any standard protocol; otherwise, <code>false</code>
*
* @see #setSecure
*
*/
public boolean getSecure() {
return secure;
}
/**
* Returns the name of the cookie. The name cannot be changed after
* creation.
*
* @return a <code>String</code> specifying the cookie's name
*
*/
public String getName() {
return name;
}
/**
*
* Assigns a new value to a cookie after the cookie is created.
* If you use a binary value, you may want to use BASE64 encoding.
*
* <p>With Version 0 cookies, values should not contain white
* space, brackets, parentheses, equals signs, commas,
* double quotes, slashes, question marks, at signs, colons,
* and semicolons. Empty values may not behave the same way
* on all browsers.
*
* @param newValue a <code>String</code> specifying the new value
*
*
* @see #getValue
*
*/
public void setValue(String newValue) {
value = newValue;
}
/**
* Returns the value of the cookie.
*
* @return a <code>String</code> containing the cookie's
* present value
*
* @see #setValue
*
*/
public String getValue() {
return value;
}
/**
* Returns the version of the protocol this cookie complies
* with. Version 1 complies with RFC 2965/2109,
* and version 0 complies with the original
* cookie specification drafted by Netscape. Cookies provided
* by a browser use and identify the browser's cookie version.
*
*
* @return 0 if the cookie complies with the
* original Netscape specification; 1
* if the cookie complies with RFC 2965/2109
*
* @see #setVersion
*
*/
public int getVersion() {
return version;
}
/**
* Sets the version of the cookie protocol this cookie complies
* with. Version 0 complies with the original Netscape cookie
* specification. Version 1 complies with RFC 2965/2109.
*
*
* @param v 0 if the cookie should comply with
* the original Netscape specification;
* 1 if the cookie should comply with RFC 2965/2109
*
* @throws IllegalArgumentException if <tt>v</tt> is neither 0 nor 1
*
* @see #getVersion
*
*/
public void setVersion(int v) {
if (v != 0 && v != 1) {
throw new IllegalArgumentException("cookie version should be 0 or 1");
}
version = v;
}
/**
* The utility method to check whether a host name is in a domain
* or not.
*
* <p>This concept is described in the cookie specification.
* To understand the concept, some terminologies need to be defined first:
* <blockquote>
* effective host name = hostname if host name contains dot<br>
* or = hostname.local if not
* </blockquote>
* <p>Host A's name domain-matches host B's if:
* <blockquote><ul>
* <li>their host name strings string-compare equal; or</li>
* <li>A is a HDN string and has the form NB, where N is a non-empty
* name string, B has the form .B', and B' is a HDN string. (So,
* x.y.com domain-matches .Y.com but not Y.com.)</li>
* </ul></blockquote>
*
* <p>A host isn't in a domain (RFC 2965 sec. 3.3.2) if:
* <blockquote><ul>
* <li>The value for the Domain attribute contains no embedded dots,
* and the value is not .local.</li>
* <li>The effective host name that derives from the request-host does
* not domain-match the Domain attribute.</li>
* <li>The request-host is a HDN (not IP address) and has the form HD,
* where D is the value of the Domain attribute, and H is a string
* that contains one or more dots.</li>
* </ul></blockquote>
*
* <p>Examples:
* <blockquote><ul>
* <li>A Set-Cookie2 from request-host y.x.foo.com for Domain=.foo.com
* would be rejected, because H is y.x and contains a dot.</li>
* <li>A Set-Cookie2 from request-host x.foo.com for Domain=.foo.com
* would be accepted.</li>
* <li>A Set-Cookie2 with Domain=.com or Domain=.com., will always be
* rejected, because there is no embedded dot.</li>
* <li>A Set-Cookie2 with Domain=ajax.com will be accepted, and the
* value for Domain will be taken to be .ajax.com, because a dot
* gets prepended to the value.</li>
* <li>A Set-Cookie2 from request-host example for Domain=.local will
* be accepted, because the effective host name for the request-
* host is example.local, and example.local domain-matches .local.</li>
* </ul></blockquote>
*
* @param domain the domain name to check host name with
* @param host the host name in question
* @return <tt>true</tt> if they domain-matches; <tt>false</tt> if not
*/
public static boolean domainMatches(String domain, String host) {
if (domain == null || host == null)
return false;
// if there's no embedded dot in domain and domain is not .local
boolean isLocalDomain = ".local".equalsIgnoreCase(domain);
int embeddedDotInDomain = domain.indexOf('.');
if (embeddedDotInDomain == 0)
embeddedDotInDomain = domain.indexOf('.', 1);
if (!isLocalDomain
&& (embeddedDotInDomain == -1 || embeddedDotInDomain == domain.length() - 1))
return false;
// if the host name contains no dot and the domain name is .local
int firstDotInHost = host.indexOf('.');
if (firstDotInHost == -1 && isLocalDomain)
return true;
int domainLength = domain.length();
int lengthDiff = host.length() - domainLength;
if (lengthDiff == 0) {
// if the host name and the domain name are just string-compare euqal
return host.equalsIgnoreCase(domain);
}
else if (lengthDiff > 0) {
// need to check H & D component
String H = host.substring(0, lengthDiff);
String D = host.substring(lengthDiff);
return (H.indexOf('.') == -1 && D.equalsIgnoreCase(domain));
}
else if (lengthDiff == -1) {
// if domain is actually .host
return (domain.charAt(0) == '.' &&
host.equalsIgnoreCase(domain.substring(1)));
}
return false;
}
/**
* Constructs a cookie header string representation of this cookie,
* which is in the format defined by corresponding cookie specification,
* but without the leading "Cookie:" token.
*
* @return a string form of the cookie. The string has the defined format
*/
public String toString() {
if (getVersion() > 0) {
return toRFC2965HeaderString();
} else {
return toNetscapeHeaderString();
}
}
/**
* Test the equality of two http cookies.
*
* <p> The result is <tt>true</tt> only if two cookies
* come from same domain (case-insensitive),
* have same name (case-insensitive),
* and have same path (case-sensitive).
*
* @return <tt>true</tt> if 2 http cookies equal to each other;
* otherwise, <tt>false</tt>
*/
public boolean equals(Object obj) {
if (obj == this)
return true;
if (!(obj instanceof HttpCookie))
return false;
HttpCookie other = (HttpCookie)obj;
// One http cookie equals to another cookie (RFC 2965 sec. 3.3.3) if:
// 1. they come from same domain (case-insensitive),
// 2. have same name (case-insensitive),
// 3. and have same path (case-sensitive).
return equalsIgnoreCase(getName(), other.getName()) &&
equalsIgnoreCase(getDomain(), other.getDomain()) &&
equals(getPath(), other.getPath());
}
/**
* Return hash code of this http cookie. The result is the sum of
* hash code value of three significant components of this cookie:
* name, domain, and path.
* That is, the hash code is the value of the expression:
* <blockquote>
* getName().toLowerCase().hashCode()<br>
* + getDomain().toLowerCase().hashCode()<br>
* + getPath().hashCode()
* </blockquote>
*
* @return this http cookie's hash code
*/
public int hashCode() {
int h1 = name.toLowerCase().hashCode();
int h2 = (domain!=null) ? domain.toLowerCase().hashCode() : 0;
int h3 = (path!=null) ? path.hashCode() : 0;
return h1 + h2 + h3;
}
/**
* Create and return a copy of this object.
*
* @return a clone of this http cookie
*/
public Object clone() {
try {
return super.clone();
} catch (CloneNotSupportedException e) {
throw new RuntimeException(e.getMessage());
}
}
/* ---------------- Private operations -------------- */
// Note -- disabled for now to allow full Netscape compatibility
// from RFC 2068, token special case characters
//
// private static final String tspecials = "()<>@,;:\\\"/[]?={} \t";
private static final String tspecials = ",;";
/*
* Tests a string and returns true if the string counts as a
* token.
*
* @param value the <code>String</code> to be tested
*
* @return <code>true</code> if the <code>String</code> is
* a token; <code>false</code> if it is not
*/
private static boolean isToken(String value) {
int len = value.length();
for (int i = 0; i < len; i++) {
char c = value.charAt(i);
if (c < 0x20 || c >= 0x7f || tspecials.indexOf(c) != -1)
return false;
}
return true;
}
/*
* @param name the name to be tested
* @return <tt>true</tt> if the name is reserved by cookie
* specification, <tt>false</tt> if it is not
*/
private static boolean isReserved(String name) {
if (name.equalsIgnoreCase("Comment")
|| name.equalsIgnoreCase("CommentURL") // rfc2965 only
|| name.equalsIgnoreCase("Discard") // rfc2965 only
|| name.equalsIgnoreCase("Domain")
|| name.equalsIgnoreCase("Expires") // netscape draft only
|| name.equalsIgnoreCase("Max-Age")
|| name.equalsIgnoreCase("Path")
|| name.equalsIgnoreCase("Port") // rfc2965 only
|| name.equalsIgnoreCase("Secure")
|| name.equalsIgnoreCase("Version")
|| name.charAt(0) == '$')
{
return true;
}
return false;
}
/*
* Parse header string to cookie object.
*
* @param header header string; should contain only one NAME=VALUE pair
*
* @return an HttpCookie being extracted
*
* @throws IllegalArgumentException if header string violates the cookie
* specification
*/
private static HttpCookie parseInternal(String header)
{
HttpCookie cookie = null;
String namevaluePair = null;
StringTokenizer tokenizer = new StringTokenizer(header, ";");
// there should always have at least on name-value pair;
// it's cookie's name
try {
namevaluePair = tokenizer.nextToken();
int index = namevaluePair.indexOf('=');
if (index != -1) {
String name = namevaluePair.substring(0, index).trim();
String value = namevaluePair.substring(index + 1).trim();
cookie = new HttpCookie(name, stripOffSurroundingQuote(value));
} else {
// no "=" in name-value pair; it's an error
throw new IllegalArgumentException("Invalid cookie name-value pair");
}
} catch (NoSuchElementException ignored) {
throw new IllegalArgumentException("Empty cookie header string");
}
// remaining name-value pairs are cookie's attributes
while (tokenizer.hasMoreTokens()) {
namevaluePair = tokenizer.nextToken();
int index = namevaluePair.indexOf('=');
String name, value;
if (index != -1) {
name = namevaluePair.substring(0, index).trim();
value = namevaluePair.substring(index + 1).trim();
} else {
name = namevaluePair.trim();
value = null;
}
// assign attribute to cookie
assignAttribute(cookie, name, value);
}
return cookie;
}
/*
* assign cookie attribute value to attribute name;
* use a map to simulate method dispatch
*/
static interface CookieAttributeAssignor {
public void assign(HttpCookie cookie, String attrName, String attrValue);
}
static java.util.Map<String, CookieAttributeAssignor> assignors = null;
static {
assignors = new java.util.HashMap<String, CookieAttributeAssignor>();
assignors.put("comment", new CookieAttributeAssignor(){
public void assign(HttpCookie cookie, String attrName, String attrValue) {
if (cookie.getComment() == null) cookie.setComment(attrValue);
}
});
assignors.put("commenturl", new CookieAttributeAssignor(){
public void assign(HttpCookie cookie, String attrName, String attrValue) {
if (cookie.getCommentURL() == null) cookie.setCommentURL(attrValue);
}
});
assignors.put("discard", new CookieAttributeAssignor(){
public void assign(HttpCookie cookie, String attrName, String attrValue) {
cookie.setDiscard(true);
}
});
assignors.put("domain", new CookieAttributeAssignor(){
public void assign(HttpCookie cookie, String attrName, String attrValue) {
if (cookie.getDomain() == null) cookie.setDomain(attrValue);
}
});
assignors.put("max-age", new CookieAttributeAssignor(){
public void assign(HttpCookie cookie, String attrName, String attrValue) {
try {
long maxage = Long.parseLong(attrValue);
if (cookie.getMaxAge() == MAX_AGE_UNSPECIFIED) cookie.setMaxAge(maxage);
} catch (NumberFormatException ignored) {
throw new IllegalArgumentException("Illegal cookie max-age attribute");
}
}
});
assignors.put("path", new CookieAttributeAssignor(){
public void assign(HttpCookie cookie, String attrName, String attrValue) {
if (cookie.getPath() == null) cookie.setPath(attrValue);
}
});
assignors.put("port", new CookieAttributeAssignor(){
public void assign(HttpCookie cookie, String attrName, String attrValue) {
if (cookie.getPortlist() == null) cookie.setPortlist(attrValue);
}
});
assignors.put("secure", new CookieAttributeAssignor(){
public void assign(HttpCookie cookie, String attrName, String attrValue) {
cookie.setSecure(true);
}
});
assignors.put("version", new CookieAttributeAssignor(){
public void assign(HttpCookie cookie, String attrName, String attrValue) {
try {
int version = Integer.parseInt(attrValue);
cookie.setVersion(version);
} catch (NumberFormatException ignored) {
throw new IllegalArgumentException("Illegal cookie version attribute");
}
}
});
assignors.put("expires", new CookieAttributeAssignor(){ // Netscape only
public void assign(HttpCookie cookie, String attrName, String attrValue) {
if (cookie.getMaxAge() == MAX_AGE_UNSPECIFIED) {
cookie.setMaxAge(cookie.expiryDate2DeltaSeconds(attrValue));
}
}
});
}
private static void assignAttribute(HttpCookie cookie,
String attrName,
String attrValue)
{
// strip off the surrounding "-sign if there's any
attrValue = stripOffSurroundingQuote(attrValue);
CookieAttributeAssignor assignor = assignors.get(attrName.toLowerCase());
if (assignor != null) {
assignor.assign(cookie, attrName, attrValue);
} else {
// must be an error
throw new IllegalArgumentException("Illegal cookie attribute");
}
}
/*
* Constructs a string representation of this cookie. The string format is
* as Netscape spec, but without leading "Cookie:" token.
*/
private String toNetscapeHeaderString() {
StringBuilder sb = new StringBuilder();
sb.append(getName() + "=" + getValue());
return sb.toString();
}
/*
* Constructs a string representation of this cookie. The string format is
* as RFC 2965/2109, but without leading "Cookie:" token.
*/
private String toRFC2965HeaderString() {
StringBuilder sb = new StringBuilder();
sb.append(getName()).append("=\"").append(getValue()).append('"');
if (getPath() != null)
sb.append(";$Path=\"").append(getPath()).append('"');
if (getDomain() != null)
sb.append(";$Domain=\"").append(getDomain()).append('"');
if (getPortlist() != null)
sb.append(";$Port=\"").append(getPortlist()).append('"');
return sb.toString();
}
/*
* @param dateString a date string in format of
* "EEE',' dd-MMM-yyyy HH:mm:ss 'GMT'",
* which defined in Netscape cookie spec
*
* @return delta seconds between this cookie's creation
* time and the time specified by dateString
*/
private long expiryDate2DeltaSeconds(String dateString) {
SimpleDateFormat df = new SimpleDateFormat(NETSCAPE_COOKIE_DATE_FORMAT);
df.setTimeZone(TimeZone.getTimeZone("GMT"));
try {
Date date = df.parse(dateString);
return (date.getTime() - whenCreated) / 1000;
} catch (Exception e) {
return 0;
}
}
/*
* try to guess the cookie version through set-cookie header string
*/
private static int guessCookieVersion(String header) {
int version = 0;
header = header.toLowerCase();
if (header.indexOf("expires=") != -1) {
// only netscape cookie using 'expires'
version = 0;
} else if (header.indexOf("version=") != -1) {
// version is mandatory for rfc 2965/2109 cookie
version = 1;
} else if (header.indexOf("max-age") != -1) {
// rfc 2965/2109 use 'max-age'
version = 1;
} else if (startsWithIgnoreCase(header, SET_COOKIE2)) {
// only rfc 2965 cookie starts with 'set-cookie2'
version = 1;
}
return version;
}
private static String stripOffSurroundingQuote(String str) {
if (str != null && str.length() > 0 &&
str.charAt(0) == '"' && str.charAt(str.length() - 1) == '"') {
return str.substring(1, str.length() - 1);
} else {
return str;
}
}
private static boolean equalsIgnoreCase(String s, String t) {
if (s == t) return true;
if ((s != null) && (t != null)) {
return s.equalsIgnoreCase(t);
}
return false;
}
private static boolean equals(String s, String t) {
if (s == t) return true;
if ((s != null) && (t != null)) {
return s.equals(t);
}
return false;
}
private static boolean startsWithIgnoreCase(String s, String start) {
if (s == null || start == null) return false;
if (s.length() >= start.length() &&
start.equalsIgnoreCase(s.substring(0, start.length()))) {
return true;
}
return false;
}
/*
* Split cookie header string according to rfc 2965:
* 1) split where it is a comma;
* 2) but not the comma surrounding by double-quotes, which is the comma
* inside port list or embeded URIs.
*
* @param header the cookie header string to split
*
* @return list of strings; never null
*
*/
private static List<String> splitMultiCookies(String header) {
List<String> cookies = new java.util.ArrayList<String>();
int quoteCount = 0;
int p, q;
for (p = 0, q = 0; p < header.length(); p++) {
char c = header.charAt(p);
if (c == '"') quoteCount++;
if (c == ',' && (quoteCount % 2 == 0)) { // it is comma and not surrounding by double-quotes
cookies.add(header.substring(q, p));
q = p + 1;
}
}
cookies.add(header.substring(q));
return cookies;
}
}
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