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:
    v 2.3
    See Also:
    HttpServletRequest
    • Constructor Detail

      • HttpServletRequestWrapper

        public HttpServletRequestWrapper​(HttpServletRequest request)
        Constructs a request object wrapping the given request.
        Parameters:
        request - The request to wrap
        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
      • 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
      • 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
      • getRequestURI

        public java.lang.String getRequestURI()
        The default behavior of this method is to return getRequestURI() on the wrapped request object.
        Specified by:
        getRequestURI in interface HttpServletRequest
        Returns:
        a String containing the part of the URL from the protocol name up to the query string
        See Also:
        HttpServletRequest.getRequestURL()
      • 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 call changeSessionId() on the wrapped request object.
        Specified by:
        changeSessionId in interface HttpServletRequest
        Returns:
        the new session ID allocated to the session
        See Also:
        HttpSessionIdListener
      • authenticate

        public boolean authenticate​(HttpServletResponse response)
                             throws java.io.IOException,
                                    ServletException
        Triggers the same authentication process as would be triggered if the request is for a resource that is protected by a security constraint.

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

        Specified by:
        authenticate in interface HttpServletRequest
        Parameters:
        response - The response to use to return any authentication challenge
        Returns:
        true if the user is successfully authenticated and false if not
        Throws:
        java.io.IOException - if the authentication process attempted to read from the request or write to the response and an I/O error occurred
        ServletException - if the authentication failed and the caller is expected to handle the failure
        Since:
        Servlet 3.0
      • getParts

        public java.util.Collection<Part> getParts()
                                            throws java.io.IOException,
                                                   ServletException
        Return a collection of all uploaded Parts.

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

        Specified by:
        getParts in interface HttpServletRequest
        Returns:
        A collection of all uploaded Parts.
        Throws:
        java.io.IOException - if an I/O error occurs
        ServletException - if the request is not multipart/form-data
        Since:
        Servlet 3.0
      • getPart

        public Part getPart​(java.lang.String name)
                     throws java.io.IOException,
                            ServletException
        Gets the named Part or null if the Part does not exist. Triggers upload of all Parts.

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

        Specified by:
        getPart in interface HttpServletRequest
        Parameters:
        name - The name of the Part to obtain
        Returns:
        The named Part or null if the Part does not exist
        Throws:
        java.io.IOException - if an I/O error occurs
        ServletException - if the request is not multipart/form-data
        Since:
        Servlet 3.0
      • upgrade

        public <T extends HttpUpgradeHandler> T upgrade​(java.lang.Class<T> httpUpgradeHandlerClass)
                                                 throws java.io.IOException,
                                                        ServletException
        Start the HTTP upgrade process and create and instance of the provided protocol handler class. The connection will be passed this instance once the current request/response pair has completed processing. Calling this method sets the response status to HttpServletResponse.SC_SWITCHING_PROTOCOLS.

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

        Specified by:
        upgrade in interface HttpServletRequest
        Type Parameters:
        T - The type of the upgrade handler
        Parameters:
        httpUpgradeHandlerClass - The class that implements the upgrade handler
        Returns:
        A newly created instance of the specified upgrade handler type
        Throws:
        java.io.IOException - if an I/O error occurred during the upgrade
        ServletException - if the given httpUpgradeHandlerClass fails to be instantiated
        Since:
        Servlet 3.1
      • newPushBuilder

        public PushBuilder newPushBuilder()
        Obtain a builder for generating push requests. PushBuilder documents how this request will be used as the basis for a push request. Each call to this method will return a new instance, independent of any previous instance obtained.

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

        Specified by:
        newPushBuilder in interface HttpServletRequest
        Returns:
        A builder that can be used to generate push requests based on this request or null if push is not supported. Note that even if a PushBuilder instance is returned, by the time that PushBuilder.push() is called, it may no longer be valid to push a request and the push request will be ignored.
        Since:
        Servlet 4.0
      • getTrailerFields

        public java.util.Map<java.lang.String,​java.lang.String> getTrailerFields()
        Obtain a Map of the trailer fields that is not backed by the request object.

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

        Specified by:
        getTrailerFields in interface HttpServletRequest
        Returns:
        A Map of the received trailer fields with all keys lower case or an empty Map if no trailers are present
        Since:
        Servlet 4.0
      • isTrailerFieldsReady

        public boolean isTrailerFieldsReady()
        Are trailer fields ready to be read (there may still be no trailers to read). This method always returns true if the underlying protocol does not support trailer fields. Otherwise, true is returned once all of the following are true:
        • The application has ready all the request data and an EOF has been received or the content-length is zero
        • All trailer fields, if any, have been received

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

        Specified by:
        isTrailerFieldsReady in interface HttpServletRequest
        Returns:
        true if trailers are ready to be read
        Since:
        Servlet 4.0