Package javax.servlet.http

Class HttpServletRequestWrapper

java.lang.Object
javax.servlet.ServletRequestWrapper
javax.servlet.http.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:

  • Constructor Details

  • Method Details

    • getAuthType

      public 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(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 String getHeader(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 Enumeration<String> getHeaders(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 Enumeration<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(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 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 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 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 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:

    • getQueryString

      public 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 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(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 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

    • getRequestedSessionId

      public String getRequestedSessionId()
      The default behavior of this method is to return getRequestedSessionId() on the wrapped request object.
      Specified by:
      getRequestedSessionId in interface HttpServletRequest
      Returns:
      a String specifying the session ID, or null if the request did not specify a session ID
      See Also:

    • getRequestURI

      public 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:

    • getRequestURL

      public 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 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:

    • getSession

      public HttpSession getSession()
      The default behavior of this method is to return getSession() on the wrapped request object.
      Specified by:
      getSession in interface HttpServletRequest
      Returns:
      the HttpSession associated with this request
      See Also:

    • changeSessionId

      public 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

    • isRequestedSessionIdValid

      public boolean isRequestedSessionIdValid()
      The default behavior of this method is to return isRequestedSessionIdValid() on the wrapped request object.
      Specified by:
      isRequestedSessionIdValid in interface HttpServletRequest
      Returns:
      true if this request has an id for a valid session in the current session context; false otherwise
      See Also:

    • isRequestedSessionIdFromCookie

      public boolean isRequestedSessionIdFromCookie()
      The default behavior of this method is to return isRequestedSessionIdFromCookie() on the wrapped request object.
      Specified by:
      isRequestedSessionIdFromCookie in interface HttpServletRequest
      Returns:
      true if the session ID was conveyed to the server an an HTTP cookie; otherwise, false
      See Also:

    • isRequestedSessionIdFromURL

      public boolean isRequestedSessionIdFromURL()
      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
      See Also:

    • 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 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:
      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(String username, 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

    • logout

      public void logout() throws ServletException
      The default behavior of this method is to call login on the wrapped request object.
      Specified by:
      logout in interface HttpServletRequest
      Throws:
      ServletException - if logout fails
      Since:
      Servlet 3.0

    • getParts

      public Collection<Part> getParts() throws 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:
      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:

    • getPart

      public Part getPart(String name) throws 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:
      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:

    • upgrade

      public <T extends HttpUpgradeHandler> T upgrade(Class<T> handlerClass) throws 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:
      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:

    • 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 Map<String,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