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Cookie class

Cookie class. 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? be aware, and use them sparingly. Cookie class. ConstructorCookie(

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Cookie class

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    1. Cookie class In package javax.servlet.http Encapsulates a cookie A cookie’s value can uniquely identify a client ? good for maintaining state (session management)

    2. Cookie class 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 ? be aware, and use them sparingly

    3. Cookie class Constructor Cookie( String name, String value ) Cookie class has accessors (get methods) and mutators (set methods) for all the instance variables: name, value, maxAge, comment, domain, path, secure, version

    4. Cookie class String getName( ) String getValue( ) void setName( String name ) void setValue( String value )

    5. Cookie class void setMaxAge( int expiry ) /* sets the maximum age of the cookie in seconds */ int getMaxAge( ) /* Returns the maximum age of the cookie, in seconds. -1 indicating the cookie will persist until browser shutdown (default or about to expire) */

    6. Cookie class void setPath( String path ) /* sets path so that JSPs and servlets from that directory and below can access the cookie; “/” indicates entire application */ String getPath( )

    7. Cookie class void setDomain( String domainPattern ) /* enables to make cookie available to other hosts: if argument is “.ct366.com”, then cookie is available to “www.xyz.ct366.com” */ String getDomain( )

    8. Cookie class void setSecure( boolean secure ) /* true ? cookie can only be sent over a secure connection; default = false */ boolean isSecure( )

    9. Setting a Cookie Cookie cookie = new Cookie( name, value ); // response: implicit HttpServletResponse object // HttpServletResponse has an addCookie method void addCookie( Cookie cookie ) response.addCookie( cookie ); /* Typically, cookies are set at the beginning of a JSP page, as they are sent out as part of the HTTP headers. addCookie can be called several times */

    10. Forms - Java Server Pages request is an implicit object that we use for retrieving form information request is an instance of class HttpServletRequest Information can be found at http://java.sun.com/webservices/docs/1.5/api/javax/servlet/http/HttpServletRequest.html

    11. HttpServletRequest methods getCookies()           Returns an array containing all of the Cookie objects the client sent with this request. // Returns an array of Cookie objects

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