Package javax.servlet.http

Class HttpServletRequestWrapper

  • All Implemented Interfaces:
    HttpServletRequest, ServletRequest

    public class HttpServletRequestWrapper
extends ServletRequestWrapper
implements HttpServletRequest
    Provides a convenient implementation of the HttpServletRequest interface that can be subclassed by developers wishing to adapt the request to a Servlet.

    This class implements the Wrapper or Decorator pattern. Methods default to calling through to the wrapped request object.

    Since:
    Servlet 2.3
    See Also:
    HttpServletRequest

    • Constructor Detail

      • HttpServletRequestWrapper

        public HttpServletRequestWrapper​(HttpServletRequest request)
        Constructs a request object wrapping the given request.
        Parameters:
        request - the HttpServletRequest to be wrapped.
        Throws:
        java.lang.IllegalArgumentException - if the request is null

    • Method Detail

      • getAuthType

        public java.lang.String getAuthType​()
        The default behavior of this method is to return getAuthType() on the wrapped request object.
        Specified by:
        getAuthType in interface HttpServletRequest
        Returns:
        one of the static members BASIC_AUTH, FORM_AUTH, CLIENT_CERT_AUTH, DIGEST_AUTH (suitable for == comparison) or the container-specific string indicating the authentication scheme, or null if the request was not authenticated.

      • getCookies

        public Cookie[] getCookies​()
        The default behavior of this method is to return getCookies() on the wrapped request object.
        Specified by:
        getCookies in interface HttpServletRequest
        Returns:
        an array of all the Cookies included with this request, or null if the request has no cookies

      • getDateHeader

        public long getDateHeader​(java.lang.String name)
        The default behavior of this method is to return getDateHeader(String name) on the wrapped request object.
        Specified by:
        getDateHeader in interface HttpServletRequest
        Parameters:
        name - a String specifying the name of the header
        Returns:
        a long value representing the date specified in the header expressed as the number of milliseconds since January 1, 1970 GMT, or -1 if the named header was not included with the request

      • getHeader

        public java.lang.String getHeader​(java.lang.String name)
        The default behavior of this method is to return getHeader(String name) on the wrapped request object.
        Specified by:
        getHeader in interface HttpServletRequest
        Parameters:
        name - a String specifying the header name
        Returns:
        a String containing the value of the requested header, or null if the request does not have a header of that name

      • getHeaders

        public java.util.Enumeration<java.lang.String> getHeaders​(java.lang.String name)
        The default behavior of this method is to return getHeaders(String name) on the wrapped request object.
        Specified by:
        getHeaders in interface HttpServletRequest
        Parameters:
        name - a String specifying the header name
        Returns:
        an Enumeration containing the values of the requested header. If the request does not have any headers of that name return an empty enumeration. If the container does not allow access to header information, return null

      • getHeaderNames

        public java.util.Enumeration<java.lang.String> getHeaderNames​()
        The default behavior of this method is to return getHeaderNames() on the wrapped request object.
        Specified by:
        getHeaderNames in interface HttpServletRequest
        Returns:
        an enumeration of all the header names sent with this request; if the request has no headers, an empty enumeration; if the servlet container does not allow servlets to use this method, null

      • getIntHeader

        public int getIntHeader​(java.lang.String name)
        The default behavior of this method is to return getIntHeader(String name) on the wrapped request object.
        Specified by:
        getIntHeader in interface HttpServletRequest
        Parameters:
        name - a String specifying the name of a request header
        Returns:
        an integer expressing the value of the request header or -1 if the request doesn't have a header of this name

      • getHttpServletMapping

        public HttpServletMapping getHttpServletMapping​()

        The default behavior of this method is to return getServletMapping() on the wrapped request object.

        Specified by:
        getHttpServletMapping in interface HttpServletRequest
        Returns:
        An instance of HttpServletMapping describing the manner in which the current request was invoked.

      • getMethod

        public java.lang.String getMethod​()
        The default behavior of this method is to return getMethod() on the wrapped request object.
        Specified by:
        getMethod in interface HttpServletRequest
        Returns:
        a String specifying the name of the method with which this request was made

      • getPathInfo

        public java.lang.String getPathInfo​()
        The default behavior of this method is to return getPathInfo() on the wrapped request object.
        Specified by:
        getPathInfo in interface HttpServletRequest
        Returns:
        a String, decoded by the web container, specifying extra path information that comes after the servlet path but before the query string in the request URL; or null if the URL does not have any extra path information

      • getPathTranslated

        public java.lang.String getPathTranslated​()
        The default behavior of this method is to return getPathTranslated() on the wrapped request object.
        Specified by:
        getPathTranslated in interface HttpServletRequest
        Returns:
        a String specifying the real path, or null if the URL does not have any extra path information

      • getContextPath

        public java.lang.String getContextPath​()
        The default behavior of this method is to return getContextPath() on the wrapped request object.
        Specified by:
        getContextPath in interface HttpServletRequest
        Returns:
        a String specifying the portion of the request URI that indicates the context of the request
        See Also:
        ServletContext.getContextPath()

      • getQueryString

        public java.lang.String getQueryString​()
        The default behavior of this method is to return getQueryString() on the wrapped request object.
        Specified by:
        getQueryString in interface HttpServletRequest
        Returns:
        a String containing the query string or null if the URL contains no query string. The value is not decoded by the container.

      • getRemoteUser

        public java.lang.String getRemoteUser​()
        The default behavior of this method is to return getRemoteUser() on the wrapped request object.
        Specified by:
        getRemoteUser in interface HttpServletRequest
        Returns:
        a String specifying the login of the user making this request, or null if the user login is not known

      • isUserInRole

        public boolean isUserInRole​(java.lang.String role)
        The default behavior of this method is to return isUserInRole(String role) on the wrapped request object.
        Specified by:
        isUserInRole in interface HttpServletRequest
        Parameters:
        role - a String specifying the name of the role
        Returns:
        a boolean indicating whether the user making this request belongs to a given role; false if the user has not been authenticated

      • getUserPrincipal

        public java.security.Principal getUserPrincipal​()
        The default behavior of this method is to return getUserPrincipal() on the wrapped request object.
        Specified by:
        getUserPrincipal in interface HttpServletRequest
        Returns:
        a java.security.Principal containing the name of the user making this request; null if the user has not been authenticated

      • getRequestURL

        public java.lang.StringBuffer getRequestURL​()
        The default behavior of this method is to return getRequestURL() on the wrapped request object.
        Specified by:
        getRequestURL in interface HttpServletRequest
        Returns:
        a StringBuffer object containing the reconstructed URL

      • getServletPath

        public java.lang.String getServletPath​()
        The default behavior of this method is to return getServletPath() on the wrapped request object.
        Specified by:
        getServletPath in interface HttpServletRequest
        Returns:
        a String containing the name or path of the servlet being called, as specified in the request URL, decoded, or an empty string if the servlet used to process the request is matched using the "/*" pattern.

      • getSession

        public HttpSession getSession​(boolean create)
        The default behavior of this method is to return getSession(boolean create) on the wrapped request object.
        Specified by:
        getSession in interface HttpServletRequest
        Parameters:
        create - true to create a new session for this request if necessary; false to return null if there's no current session
        Returns:
        the HttpSession associated with this request or null if create is false and the request has no valid session
        See Also:
        HttpServletRequest.getSession()

      • changeSessionId

        public java.lang.String changeSessionId​()
        The default behavior of this method is to return changeSessionId() on the wrapped request object.
        Specified by:
        changeSessionId in interface HttpServletRequest
        Returns:
        the new session id
        Since:
        Servlet 3.1

      • isRequestedSessionIdFromUrl

        @Deprecated
public boolean isRequestedSessionIdFromUrl​()
        Deprecated. As of Version 4.0 of the Java Servlet API, use isRequestedSessionIdFromURL() instead.
        The default behavior of this method is to return isRequestedSessionIdFromUrl() on the wrapped request object.
        Specified by:
        isRequestedSessionIdFromUrl in interface HttpServletRequest
        Returns:
        true if the session ID was conveyed to the server as part of a URL; otherwise, false

      • authenticate

        public boolean authenticate​(HttpServletResponse response)
                     throws java.io.IOException,
                            ServletException
        The default behavior of this method is to call authenticate on the wrapped request object.
        Specified by:
        authenticate in interface HttpServletRequest
        Parameters:
        response - The HttpServletResponse associated with this HttpServletRequest
        Returns:
        true when non-null values were or have been established as the values returned by getUserPrincipal, getRemoteUser, and getAuthType. Return false if authentication is incomplete and the underlying login mechanism has committed, in the response, the message (e.g., challenge) and HTTP status code to be returned to the user.
        Throws:
        java.io.IOException - if an input or output error occurred while reading from this request or writing to the given response
        ServletException - if the authentication failed and the caller is responsible for handling the error (i.e., the underlying login mechanism did NOT establish the message and HTTP status code to be returned to the user)
        Since:
        Servlet 3.0

      • login

        public void login​(java.lang.String username,
                  java.lang.String password)
           throws ServletException
        The default behavior of this method is to call login on the wrapped request object.
        Specified by:
        login in interface HttpServletRequest
        Parameters:
        username - The String value corresponding to the login identifier of the user.
        password - The password String corresponding to the identified user.
        Throws:
        ServletException - if the configured login mechanism does not support username password authentication, or if a non-null caller identity had already been established (prior to the call to login), or if validation of the provided username and password fails.
        Since:
        Servlet 3.0

      • getParts

        public java.util.Collection<Part> getParts​()
                                    throws java.io.IOException,
                                           ServletException
        The default behavior of this method is to call getParts on the wrapped request object.

        Any changes to the returned Collection must not affect this HttpServletRequestWrapper.

        Specified by:
        getParts in interface HttpServletRequest
        Returns:
        a (possibly empty) Collection of the Part components of this request
        Throws:
        java.io.IOException - if an I/O error occurred during the retrieval of the Part components of this request
        ServletException - if this request is not of type multipart/form-data
        Since:
        Servlet 3.0
        See Also:
        MultipartConfig.maxFileSize(), MultipartConfig.maxRequestSize()

      • getPart

        public Part getPart​(java.lang.String name)
             throws java.io.IOException,
                    ServletException
        The default behavior of this method is to call getPart on the wrapped request object.
        Specified by:
        getPart in interface HttpServletRequest
        Parameters:
        name - the name of the requested Part
        Returns:
        The Part with the given name, or null if this request is of type multipart/form-data, but does not contain the requested Part
        Throws:
        java.io.IOException - if an I/O error occurred during the retrieval of the requested Part
        ServletException - if this request is not of type multipart/form-data
        Since:
        Servlet 3.0
        See Also:
        MultipartConfig.maxFileSize(), MultipartConfig.maxRequestSize()

      • upgrade

        public <T extends HttpUpgradeHandler> T upgrade​(java.lang.Class<T> handlerClass)
                                         throws java.io.IOException,
                                                ServletException
        Create an instance of HttpUpgradeHandler for a given class and uses it for the http protocol upgrade processing.
        Specified by:
        upgrade in interface HttpServletRequest
        Type Parameters:
        T - The Class, which extends HttpUpgradeHandler, of the handlerClass.
        Parameters:
        handlerClass - The HttpUpgradeHandler class used for the upgrade.
        Returns:
        an instance of the HttpUpgradeHandler
        Throws:
        java.io.IOException - if an I/O error occurred during the upgrade
        ServletException - if the given handlerClass fails to be instantiated
        Since:
        Servlet 3.1
        See Also:
        HttpUpgradeHandler, WebConnection

      • newPushBuilder

        public PushBuilder newPushBuilder​()
        The default behavior of this method is to call newPushBuilder on the wrapped request object.
        Specified by:
        newPushBuilder in interface HttpServletRequest
        Returns:
        a PushBuilder for issuing server push responses from the current request, or null if push is not supported
        Since:
        Servlet 4.0

      • getTrailerFields

        public java.util.Map<java.lang.String,java.lang.String> getTrailerFields​()
        The default behavior of this method is to call getTrailerFields on the wrapped request object.
        Specified by:
        getTrailerFields in interface HttpServletRequest
        Returns:
        A map of trailer fields in which all the keys are in lowercase, regardless of the case they had at the protocol level. If there are no trailer fields, yet HttpServletRequest.isTrailerFieldsReady() is returning true, the empty map is returned.
        Since:
        Servlet 4.0

      • isTrailerFieldsReady

        public boolean isTrailerFieldsReady​()
        The default behavior of this method is to call isTrailerFieldsReady on the wrapped request object.
        Specified by:
        isTrailerFieldsReady in interface HttpServletRequest
        Returns:
        a boolean whether trailer fields are ready to read
        Since:
        Servlet 4.0