--- /dev/null
+/*
+ * Licensed to the Apache Software Foundation (ASF) under one or more
+ * contributor license agreements. See the NOTICE file distributed with
+ * this work for additional information regarding copyright ownership.
+ * The ASF licenses this file to You under the Apache License, Version 2.0
+ * (the "License"); you may not use this file except in compliance with
+ * the License. You may obtain a copy of the License at
+ *
+ * http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+package javax.servlet.http;
+
+import java.io.Serializable;
+import java.text.MessageFormat;
+import java.util.BitSet;
+import java.util.Locale;
+import java.util.ResourceBundle;
+
+/**
+ * Creates a cookie, a small amount of information sent by a servlet to a Web
+ * browser, saved by the browser, and later sent back to the server. A cookie's
+ * value can uniquely identify a client, so cookies are commonly used for
+ * session management.
+ * <p>
+ * A cookie has a name, a single value, and optional attributes such as a
+ * comment, path and domain qualifiers, a maximum age, and a version number.
+ * Some Web browsers have bugs in how they handle the optional attributes, so
+ * use them sparingly to improve the interoperability of your servlets.
+ * <p>
+ * The servlet sends cookies to the browser by using the
+ * {@link HttpServletResponse#addCookie} method, which adds fields to HTTP
+ * response headers to send cookies to the browser, one at a time. The browser
+ * is expected to support 20 cookies for each Web server, 300 cookies total, and
+ * may limit cookie size to 4 KB each.
+ * <p>
+ * The browser returns cookies to the servlet by adding fields to HTTP request
+ * headers. Cookies can be retrieved from a request by using the
+ * {@link HttpServletRequest#getCookies} method. Several cookies might have the
+ * same name but different path attributes.
+ * <p>
+ * Cookies affect the caching of the Web pages that use them. HTTP 1.0 does not
+ * cache pages that use cookies created with this class. This class does not
+ * support the cache control defined with HTTP 1.1.
+ * <p>
+ * This class supports both the Version 0 (by Netscape) and Version 1 (by RFC
+ * 2109) cookie specifications. By default, cookies are created using Version 0
+ * to ensure the best interoperability.
+ */
+public class Cookie implements Cloneable, Serializable {
+
+ private static final CookieNameValidator validation;
+ static {
+ boolean strictNaming;
+ String prop = System.getProperty("org.apache.tomcat.util.http.ServerCookie.STRICT_NAMING");
+ if (prop != null) {
+ strictNaming = Boolean.parseBoolean(prop);
+ } else {
+ strictNaming = Boolean.getBoolean("org.apache.catalina.STRICT_SERVLET_COMPLIANCE");
+ }
+
+ if (strictNaming) {
+ validation = new RFC2109Validator();
+ }
+ else {
+ validation = new NetscapeValidator();
+ }
+ }
+
+ private static final long serialVersionUID = 1L;
+
+ private final String name;
+ private String value;
+
+ private int version = 0; // ;Version=1 ... means RFC 2109 style
+
+ //
+ // Attributes encoded in the header's cookie fields.
+ //
+ private String comment; // ;Comment=VALUE ... describes cookie's use
+ private String domain; // ;Domain=VALUE ... domain that sees cookie
+ private int maxAge = -1; // ;Max-Age=VALUE ... cookies auto-expire
+ private String path; // ;Path=VALUE ... URLs that see the cookie
+ private boolean secure; // ;Secure ... e.g. use SSL
+ private boolean httpOnly; // Not in cookie specs, but supported by browsers
+
+ /**
+ * Constructs a cookie with a specified name and value.
+ * <p>
+ * The name must conform to RFC 2109. 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 Netscape 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 (for example,
+ * a comma, space, or semicolon) or it is one of the tokens
+ * reserved for use by the cookie protocol
+ * @see #setValue
+ * @see #setVersion
+ */
+ public Cookie(String name, String value) {
+ validation.validate(name);
+ this.name = name;
+ this.value = value;
+ }
+
+ /**
+ * 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 the domain within which this cookie should be presented.
+ * <p>
+ * The form of the domain name is specified by RFC 2109. 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 2109
+ * @see #getDomain
+ */
+ public void setDomain(String pattern) {
+ domain = pattern.toLowerCase(Locale.ENGLISH); // IE allegedly needs this
+ }
+
+ /**
+ * Returns the domain name set for this cookie. The form of the domain name
+ * is set by RFC 2109.
+ *
+ * @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 negative, means the cookie is not stored; if zero,
+ * deletes the cookie
+ * @see #getMaxAge
+ */
+ public void setMaxAge(int 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; if
+ * negative, means the cookie persists until browser shutdown
+ * @see #setMaxAge
+ */
+ public int 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 2109 (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 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 uses a secure protocol;
+ * otherwise, <code>true</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
+ * @see Cookie
+ */
+ 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
+ * @see Cookie
+ */
+ public String getValue() {
+ return value;
+ }
+
+ /**
+ * Returns the version of the protocol this cookie complies with. Version 1
+ * complies with RFC 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 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 2109.
+ * <p>
+ * Since RFC 2109 is still somewhat new, consider version 1 as experimental;
+ * do not use it yet on production sites.
+ *
+ * @param v
+ * 0 if the cookie should comply with the original Netscape
+ * specification; 1 if the cookie should comply with RFC 2109
+ * @see #getVersion
+ */
+ public void setVersion(int v) {
+ version = v;
+ }
+
+ /**
+ * Overrides the standard <code>java.lang.Object.clone</code> method to
+ * return a copy of this cookie.
+ */
+ @Override
+ public Object clone() {
+ try {
+ return super.clone();
+ } catch (CloneNotSupportedException e) {
+ throw new RuntimeException(e.getMessage());
+ }
+ }
+
+ /**
+ * Sets the flag that controls if this cookie will be hidden from scripts on
+ * the client side.
+ *
+ * @param httpOnly The new value of the flag
+ *
+ * @since Servlet 3.0
+ */
+ public void setHttpOnly(boolean httpOnly) {
+ this.httpOnly = httpOnly;
+ }
+
+ /**
+ * Gets the flag that controls if this cookie will be hidden from scripts on
+ * the client side.
+ *
+ * @return <code>true</code> if the cookie is hidden from scripts, else
+ * <code>false</code>
+ * @since Servlet 3.0
+ */
+ public boolean isHttpOnly() {
+ return httpOnly;
+ }
+}
+
+
+class CookieNameValidator {
+ private static final String LSTRING_FILE = "javax.servlet.http.LocalStrings";
+ private static final ResourceBundle lStrings = ResourceBundle.getBundle(LSTRING_FILE);
+
+ protected final BitSet allowed;
+
+ protected CookieNameValidator(String separators) {
+ allowed = new BitSet(128);
+ allowed.set(0x20, 0x7f); // any CHAR except CTLs or separators
+ for (int i = 0; i < separators.length(); i++) {
+ char ch = separators.charAt(i);
+ allowed.clear(ch);
+ }
+ }
+
+ void validate(String name) {
+ if (name == null || name.length() == 0) {
+ throw new IllegalArgumentException(lStrings.getString("err.cookie_name_blank"));
+ }
+ if (!isToken(name) ||
+ name.equalsIgnoreCase("Comment") ||
+ name.equalsIgnoreCase("Discard") ||
+ name.equalsIgnoreCase("Domain") ||
+ name.equalsIgnoreCase("Expires") ||
+ name.equalsIgnoreCase("Max-Age") ||
+ name.equalsIgnoreCase("Path") ||
+ name.equalsIgnoreCase("Secure") ||
+ name.equalsIgnoreCase("Version") ||
+ name.startsWith("$")) {
+ String errMsg = lStrings.getString("err.cookie_name_is_token");
+ throw new IllegalArgumentException(MessageFormat.format(errMsg, name));
+ }
+ }
+
+ private boolean isToken(String possibleToken) {
+ int len = possibleToken.length();
+
+ for (int i = 0; i < len; i++) {
+ char c = possibleToken.charAt(i);
+ if (!allowed.get(c)) {
+ return false;
+ }
+ }
+ return true;
+ }
+}
+
+class NetscapeValidator extends CookieNameValidator {
+ private static final String NETSCAPE_SEPARATORS = ",; ";
+
+ NetscapeValidator() {
+ super(NETSCAPE_SEPARATORS);
+ }
+}
+
+class RFC2109Validator extends CookieNameValidator {
+ private static final String RFC2616_SEPARATORS = "()<>@,;:\\\"/[]?={} \t";
+
+ RFC2109Validator() {
+ super(RFC2616_SEPARATORS);
+
+ // special treatment to allow for FWD_SLASH_IS_SEPARATOR property
+ boolean allowSlash;
+ String prop = System.getProperty("org.apache.tomcat.util.http.ServerCookie.FWD_SLASH_IS_SEPARATOR");
+ if (prop != null) {
+ allowSlash = !Boolean.parseBoolean(prop);
+ } else {
+ allowSlash = !Boolean.getBoolean("org.apache.catalina.STRICT_SERVLET_COMPLIANCE");
+ }
+ if (allowSlash) {
+ allowed.set('/');
+ }
+ }
+}
projects / gigi.git / blobdiff