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:

v 2.3

See Also:

HttpServletRequest

Field Summary

Fields inherited from interface javax.servlet.http.HttpServletRequest

BASIC_AUTH, CLIENT_CERT_AUTH, DIGEST_AUTH, FORM_AUTH

Constructor Summary

Constructors

Constructor and Description
HttpServletRequestWrapper(HttpServletRequest request) Constructs a request object wrapping the given request.

Method Summary

Modifier and Type	Method and Description
boolean	authenticate(HttpServletResponse response) Triggers the same authentication process as would be triggered if the request is for a resource that is protected by a security constraint.
java.lang.String	changeSessionId() The default behavior of this method is to call changeSessionId() on the wrapped request object.
java.lang.String	getAuthType() The default behavior of this method is to return getAuthType() on the wrapped request object.
java.lang.String	getContextPath() The default behavior of this method is to return getContextPath() on the wrapped request object.
Cookie[]	getCookies() The default behavior of this method is to return getCookies() on the wrapped request object.
long	getDateHeader(java.lang.String name) The default behavior of this method is to return getDateHeader(String name) on the wrapped request object.
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.
java.util.Enumeration<java.lang.String>	getHeaderNames() The default behavior of this method is to return getHeaderNames() on the wrapped request object.
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.
int	getIntHeader(java.lang.String name) The default behavior of this method is to return getIntHeader(String name) on the wrapped request object.
Mapping	getMapping() The default behavior of this method is to return getMapping() on the wrapped request object.
java.lang.String	getMethod() The default behavior of this method is to return getMethod() on the wrapped request object.
Part	getPart(java.lang.String name) Gets the named Part or null if the Part does not exist.
java.util.Collection<Part>	getParts() Return a collection of all uploaded Parts.
java.lang.String	getPathInfo() The default behavior of this method is to return getPathInfo() on the wrapped request object.
java.lang.String	getPathTranslated() The default behavior of this method is to return getPathTranslated() on the wrapped request object.
PushBuilder	getPushBuilder() Obtain a builder for generating push requests.
java.lang.String	getQueryString() The default behavior of this method is to return getQueryString() on the wrapped request object.
java.lang.String	getRemoteUser() The default behavior of this method is to return getRemoteUser() on the wrapped request object.
java.lang.String	getRequestedSessionId() The default behavior of this method is to return getRequestedSessionId() on the wrapped request object.
java.lang.String	getRequestURI() The default behavior of this method is to return getRequestURI() on the wrapped request object.
java.lang.StringBuffer	getRequestURL() The default behavior of this method is to return getRequestURL() on the wrapped request object.
java.lang.String	getServletPath() The default behavior of this method is to return getServletPath() on the wrapped request object.
HttpSession	getSession() The default behavior of this method is to return getSession() on the wrapped request object.
HttpSession	getSession(boolean create) The default behavior of this method is to return getSession(boolean create) on the wrapped request object.
java.security.Principal	getUserPrincipal() The default behavior of this method is to return getUserPrincipal() on the wrapped request object.
boolean	isPushSupported() Does the current request allow push requests.
boolean	isRequestedSessionIdFromCookie() The default behavior of this method is to return isRequestedSessionIdFromCookie() on the wrapped request object.
boolean	isRequestedSessionIdFromUrl() Deprecated. As of Version 3.0 of the Java Servlet API
boolean	isRequestedSessionIdFromURL() The default behavior of this method is to return isRequestedSessionIdFromURL() on the wrapped request object.
boolean	isRequestedSessionIdValid() The default behavior of this method is to return isRequestedSessionIdValid() on the wrapped request object.
boolean	isUserInRole(java.lang.String role) The default behavior of this method is to return isUserInRole(String role) on the wrapped request object.
void	login(java.lang.String username, java.lang.String password) Authenticate the provided user name and password and then associated the authenticated user with the request.
void	logout() Removes any authenticated user from the request.
<T extends HttpUpgradeHandler> T	upgrade(java.lang.Class<T> httpUpgradeHandlerClass) Start the HTTP upgrade process and pass the connection to the provided protocol handler once the current request/response pair has completed processing.

Methods inherited from class javax.servlet.ServletRequestWrapper

getAsyncContext, getAttribute, getAttributeNames, getCharacterEncoding, getContentLength, getContentLengthLong, getContentType, getDispatcherType, getInputStream, getLocalAddr, getLocale, getLocales, getLocalName, getLocalPort, getParameter, getParameterMap, getParameterNames, getParameterValues, getProtocol, getReader, getRealPath, getRemoteAddr, getRemoteHost, getRemotePort, getRequest, getRequestDispatcher, getScheme, getServerName, getServerPort, getServletContext, isAsyncStarted, isAsyncSupported, isSecure, isWrapperFor, isWrapperFor, removeAttribute, setAttribute, setCharacterEncoding, setRequest, startAsync, startAsync

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Methods inherited from interface javax.servlet.ServletRequest

getAsyncContext, getAttribute, getAttributeNames, getCharacterEncoding, getContentLength, getContentLengthLong, getContentType, getDispatcherType, getInputStream, getLocalAddr, getLocale, getLocales, getLocalName, getLocalPort, getParameter, getParameterMap, getParameterNames, getParameterValues, getProtocol, getReader, getRealPath, getRemoteAddr, getRemoteHost, getRemotePort, getRequestDispatcher, getScheme, getServerName, getServerPort, getServletContext, isAsyncStarted, isAsyncSupported, isSecure, removeAttribute, setAttribute, setCharacterEncoding, startAsync, startAsync

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

getMapping

public Mapping getMapping()

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

Specified by:

getMapping in interface HttpServletRequest

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

getRequestedSessionId

public java.lang.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:

HttpServletRequest.isRequestedSessionIdValid()

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()

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:

HttpServletRequest.getSession(boolean)

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

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:

HttpServletRequest.getRequestedSessionId(), HttpServletRequest.getSession(boolean)

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 came in as a cookie; otherwise, false

See Also:

HttpServletRequest.getSession(boolean)

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 came in as part of a URL; otherwise, false

See Also:

HttpServletRequest.getSession(boolean)

isRequestedSessionIdFromUrl

@Deprecated
public boolean isRequestedSessionIdFromUrl()

Deprecated. As of Version 3.0 of the Java Servlet API

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

Specified by:

isRequestedSessionIdFromUrl in interface HttpServletRequest

Returns:

HttpServletRequest.isRequestedSessionIdFromURL()

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

login

public void login(java.lang.String username,
                  java.lang.String password)
           throws ServletException

Authenticate the provided user name and password and then associated the authenticated user with the request.

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

Specified by:

login in interface HttpServletRequest

Parameters:

username - The user name to authenticate

password - The password to use to authenticate the user

Throws:

ServletException - If any of HttpServletRequest.getRemoteUser(), HttpServletRequest.getUserPrincipal() or HttpServletRequest.getAuthType() are non-null, if the configured authenticator does not support user name and password authentication or if the authentication fails

Since:

Servlet 3.0

logout

public void logout()
            throws ServletException

Removes any authenticated user from the request.

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

Specified by:

logout in interface HttpServletRequest

Throws:

ServletException - If the logout fails

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 pass the connection to the provided protocol handler once the current request/response pair has completed processing. Calling this method sets the response status to HttpServletResponse.SC_SWITCHING_PROTOCOLS and flushes the response. Protocol specific headers must have already been set before this method is called.

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

isPushSupported

public boolean isPushSupported()

Does the current request allow push requests. This will return true only if the underlying protocol supports server push and if pushes are permitted from the current request.

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

Specified by:

isPushSupported in interface HttpServletRequest

Returns:

true if server push is supported for the current request otherwise false

Since:

Servlet 4.0

getPushBuilder

public PushBuilder getPushBuilder()

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.getPushBuilder() on the wrapped request object.

Specified by:

getPushBuilder in interface HttpServletRequest

Returns:

A builder that can be used to generate push requests based on this request.

Since:

Servlet 4.0