org.mortbay.jetty.servlet
Class ServletHttpRequest

java.lang.Object
  |
  +--org.mortbay.jetty.servlet.ServletHttpRequest

All Implemented Interfaces:

HttpServletRequest, ServletRequest

public class ServletHttpRequest

extends java.lang.Object

implements HttpServletRequest

Servlet Request Wrapper. This class wraps a Jetty HTTP request as a 2.2 Servlet request.

Note that this wrapper is not synchronized and if a request is to be operated on by multiple threads, then higher level synchronizations may be required.

Version:

$Id: ServletHttpRequest.java,v 1.45.2.2 2003/10/16 23:24:26 gregwilkins Exp $

Author:

Greg Wilkins (gregw)

Field Summary

static java.lang.String	__SESSIONID_COOKIE
static java.lang.String	__SESSIONID_NONE
static java.lang.String	__SESSIONID_NOT_CHECKED
static java.lang.String	__SESSIONID_URL

Fields inherited from interface javax.servlet.http.HttpServletRequest

BASIC_AUTH, CLIENT_CERT_AUTH, DIGEST_AUTH, FORM_AUTH

Method Summary

java.lang.Object	getAttribute(java.lang.String name) Returns the value of the named attribute as an Object, or null if no attribute of the given name exists.
java.util.Enumeration	getAttributeNames() Returns an Enumeration containing the names of the attributes available to this request.
java.lang.String	getAuthType() Returns the name of the authentication scheme used to protect the servlet.
java.lang.String	getCharacterEncoding() Returns the name of the character encoding used in the body of this request.
int	getContentLength() Returns the length, in bytes, of the request body and made available by the input stream, or -1 if the length is not known.
java.lang.String	getContentType() Returns the MIME type of the body of the request, or null if the type is not known.
java.lang.String	getContextPath() Returns the portion of the request URI that indicates the context of the request.
Cookie[]	getCookies() Returns an array containing all of the Cookie objects the client sent with this request.
long	getDateHeader(java.lang.String name) Returns the value of the specified request header as a long value that represents a Date object.
java.lang.String	getHeader(java.lang.String name) Returns the value of the specified request header as a String.
java.util.Enumeration	getHeaderNames() Returns an enumeration of all the header names this request contains.
java.util.Enumeration	getHeaders(java.lang.String s) Returns all the values of the specified request header as an Enumeration of String objects.
ServletInputStream	getInputStream() Retrieves the body of the request as binary data using a ServletInputStream.
int	getIntHeader(java.lang.String name) Returns the value of the specified request header as an int.
java.util.Locale	getLocale() Returns the preferred Locale that the client will accept content in, based on the Accept-Language header.
java.util.Enumeration	getLocales() Returns an Enumeration of Locale objects indicating, in decreasing order starting with the preferred locale, the locales that are acceptable to the client based on the Accept-Language header.
java.lang.String	getMethod() Returns the name of the HTTP method with which this request was made, for example, GET, POST, or PUT.
java.lang.String	getParameter(java.lang.String name) Returns the value of a request parameter as a String, or null if the parameter does not exist.
java.util.Map	getParameterMap() This method is not recommended as it forces the generation of a non-optimal data structure.
java.util.Enumeration	getParameterNames() Returns an Enumeration of String objects containing the names of the parameters contained in this request.
java.lang.String[]	getParameterValues(java.lang.String name) Returns an array of String objects containing all of the values the given request parameter has, or null if the parameter does not exist.
java.lang.String	getPathInfo() Returns any extra path information associated with the URL the client sent when it made this request.
java.lang.String	getPathTranslated() Returns any extra path information after the servlet name but before the query string, and translates it to a real path.
java.lang.String	getProtocol() Returns the name and version of the protocol the request uses in the form protocol/majorVersion.minorVersion, for example, HTTP/1.1.
java.lang.String	getQueryString() Returns the query string that is contained in the request URL after the path.
java.io.BufferedReader	getReader() Retrieves the body of the request as character data using a BufferedReader.
java.lang.String	getRealPath(java.lang.String path) Deprecated. As of Version 2.1 of the Java Servlet API, use ServletContext.getRealPath(java.lang.String) instead.
java.lang.String	getRemoteAddr() Returns the Internet Protocol (IP) address of the client that sent the request.
java.lang.String	getRemoteHost() Returns the fully qualified name of the client that sent the request.
java.lang.String	getRemoteUser() Returns the login of the user making this request, if the user has been authenticated, or null if the user has not been authenticated.
RequestDispatcher	getRequestDispatcher(java.lang.String url) Returns a RequestDispatcher object that acts as a wrapper for the resource located at the given path.
java.lang.String	getRequestedSessionId() Returns the session ID specified by the client.
java.lang.String	getRequestURI() Returns the part of this request's URL from the protocol name up to the query string in the first line of the HTTP request.
java.lang.StringBuffer	getRequestURL() Reconstructs the URL the client used to make the request.
java.lang.String	getScheme() Returns the name of the scheme used to make this request, for example, http, https, or ftp.
java.lang.String	getServerName() Returns the host name of the server that received the request.
int	getServerPort() Returns the port number on which this request was received.
ServletHttpResponse	getServletHttpResponse()
java.lang.String	getServletPath() Returns the part of this request's URL that calls the servlet.
HttpSession	getSession() Returns the current session associated with this request, or if the request does not have a session, creates one.
HttpSession	getSession(boolean create) Returns the current HttpSession associated with this request or, if if there is no current session and create is true, returns a new session.
java.security.Principal	getUserPrincipal() Returns a java.security.Principal object containing the name of the current authenticated user.
boolean	isRequestedSessionIdFromCookie() Checks whether the requested session ID came in as a cookie.
boolean	isRequestedSessionIdFromUrl() Deprecated.
boolean	isRequestedSessionIdFromURL() Checks whether the requested session ID came in as part of the request URL.
boolean	isRequestedSessionIdValid() Checks whether the requested session ID is still valid.
boolean	isSecure() Returns a boolean indicating whether this request was made using a secure channel, such as HTTPS.
boolean	isUserInRole(java.lang.String role) Returns a boolean indicating whether the authenticated user is included in the specified logical "role".
void	removeAttribute(java.lang.String name) Removes an attribute from this request.
void	setAttribute(java.lang.String name, java.lang.Object value) Stores an attribute in this request.
void	setCharacterEncoding(java.lang.String encoding) Overrides the name of the character encoding used in the body of this request.
java.lang.String	toString()
static ServletHttpRequest	unwrap(ServletRequest request) Unwrap a ServletRequest.

Methods inherited from class java.lang.Object

equals, getClass, hashCode, notify, notifyAll, wait, wait, wait

Field Detail

__SESSIONID_NOT_CHECKED

public static final java.lang.String __SESSIONID_NOT_CHECKED

See Also:

Constant Field Values

__SESSIONID_URL

public static final java.lang.String __SESSIONID_URL

See Also:

Constant Field Values

__SESSIONID_COOKIE

public static final java.lang.String __SESSIONID_COOKIE

See Also:

Constant Field Values

__SESSIONID_NONE

public static final java.lang.String __SESSIONID_NONE

See Also:

Constant Field Values

Method Detail

getServletHttpResponse

public ServletHttpResponse getServletHttpResponse()

getLocale

public java.util.Locale getLocale()

Description copied from interface: ServletRequest

Returns the preferred Locale that the client will accept content in, based on the Accept-Language header. If the client request doesn't provide an Accept-Language header, this method returns the default locale for the server.

Specified by:

getLocale in interface ServletRequest

Returns:

the preferred Locale for the client

getLocales

public java.util.Enumeration getLocales()

Description copied from interface: ServletRequest

Returns an Enumeration of Locale objects indicating, in decreasing order starting with the preferred locale, the locales that are acceptable to the client based on the Accept-Language header. If the client request doesn't provide an Accept-Language header, this method returns an Enumeration containing one Locale, the default locale for the server.

Specified by:

getLocales in interface ServletRequest

Returns:

an Enumeration of preferred Locale objects for the client

isSecure

public boolean isSecure()

Description copied from interface: ServletRequest

Returns a boolean indicating whether this request was made using a secure channel, such as HTTPS.

Specified by:

isSecure in interface ServletRequest

Returns:

a boolean indicating if the request was made using a secure channel

getCookies

public Cookie[] getCookies()

Description copied from interface: HttpServletRequest

Returns an array containing all of the Cookie objects the client sent with this request. This method returns null if no cookies were sent.

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)

Description copied from interface: HttpServletRequest

Returns the value of the specified request header as a long value that represents a Date object. Use this method with headers that contain dates, such as If-Modified-Since.

The date is returned as the number of milliseconds since January 1, 1970 GMT. The header name is case insensitive.

If the request did not have a header of the specified name, this method returns -1. If the header can't be converted to a date, the method throws an IllegalArgumentException.

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 reqest

getHeaderNames

public java.util.Enumeration getHeaderNames()

Description copied from interface: HttpServletRequest

Returns an enumeration of all the header names this request contains. If the request has no headers, this method returns an empty enumeration.

Some servlet containers do not allow do not allow servlets to access headers using this method, in which case this method returns null

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

getHeader

public java.lang.String getHeader(java.lang.String name)

Description copied from interface: HttpServletRequest

Returns the value of the specified request header as a String. If the request did not include a header of the specified name, this method returns null. The header name is case insensitive. You can use this method with any request header.

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 getHeaders(java.lang.String s)

Description copied from interface: HttpServletRequest

Returns all the values of the specified request header as an Enumeration of String objects.

Some headers, such as Accept-Language can be sent by clients as several headers each with a different value rather than sending the header as a comma separated list.

If the request did not include any headers of the specified name, this method returns an empty Enumeration. The header name is case insensitive. You can use this method with any request header.

Specified by:

getHeaders in interface HttpServletRequest

Parameters:

s - 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

getIntHeader

public int getIntHeader(java.lang.String name)
                 throws java.lang.NumberFormatException

Description copied from interface: HttpServletRequest

Returns the value of the specified request header as an int. If the request does not have a header of the specified name, this method returns -1. If the header cannot be converted to an integer, this method throws a NumberFormatException.

The header name is case insensitive.

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

Throws:

java.lang.NumberFormatException - If the header value can't be converted to an int

getMethod

public java.lang.String getMethod()

Description copied from interface: HttpServletRequest

Returns the name of the HTTP method with which this request was made, for example, GET, POST, or PUT. Same as the value of the CGI variable REQUEST_METHOD.

Specified by:

getMethod in interface HttpServletRequest

Returns:

a String specifying the name of the method with which this request was made

getContextPath

public java.lang.String getContextPath()

Description copied from interface: HttpServletRequest

Returns the portion of the request URI that indicates the context of the request. The context path always comes first in a request URI. The path starts with a "/" character but does not end with a "/" character. For servlets in the default (root) context, this method returns "". The container does not decode this string.

Specified by:

getContextPath in interface HttpServletRequest

Returns:

a String specifying the portion of the request URI that indicates the context of the request

getPathInfo

public java.lang.String getPathInfo()

Description copied from interface: HttpServletRequest

Returns any extra path information associated with the URL the client sent when it made this request. The extra path information follows the servlet path but precedes the query string. This method returns null if there was no extra path information.

Same as the value of the CGI variable PATH_INFO.

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()

Description copied from interface: HttpServletRequest

Returns any extra path information after the servlet name but before the query string, and translates it to a real path. Same as the value of the CGI variable PATH_TRANSLATED.

If the URL does not have any extra path information, this method returns null. The web container does not decode thins string.

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

getQueryString

public java.lang.String getQueryString()

Description copied from interface: HttpServletRequest

Returns the query string that is contained in the request URL after the path. This method returns null if the URL does not have a query string. Same as the value of the CGI variable QUERY_STRING.

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.

getAuthType

public java.lang.String getAuthType()

Description copied from interface: HttpServletRequest

Returns the name of the authentication scheme used to protect the servlet. All servlet containers support basic, form and client certificate authentication, and may additionally support digest authentication. If the servlet is not authenticated null is returned.

Same as the value of the CGI variable AUTH_TYPE.

Specified by:

getAuthType in interface HttpServletRequest

Returns:

one of the static members BASIC_AUTH, FORM_AUTH, CLIENT_CERT_AUTH, DIGEST_AUTH (suitable for == comparison) indicating the authentication scheme, or null if the request was not authenticated.

getRemoteUser

public java.lang.String getRemoteUser()

Description copied from interface: HttpServletRequest

Returns the login of the user making this request, if the user has been authenticated, or null if the user has not been authenticated. Whether the user name is sent with each subsequent request depends on the browser and type of authentication. Same as the value of the CGI variable REMOTE_USER.

Specified by:

getRemoteUser in interface HttpServletRequest

Returns:

a String specifying the login of the user making this request, or null

isUserInRole

public boolean isUserInRole(java.lang.String role)

Description copied from interface: HttpServletRequest

Returns a boolean indicating whether the authenticated user is included in the specified logical "role". Roles and role membership can be defined using deployment descriptors. If the user has not been authenticated, the method returns false.

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()

Description copied from interface: HttpServletRequest

Returns a java.security.Principal object containing the name of the current authenticated user. If the user has not been authenticated, the method returns null.

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()

Description copied from interface: HttpServletRequest

Returns the session ID specified by the client. This may not be the same as the ID of the actual session in use. For example, if the request specified an old (expired) session ID and the server has started a new session, this method gets a new session with a new ID. If the request did not specify a session ID, this method returns null.

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()

Description copied from interface: HttpServletRequest

Returns the part of this request's URL from the protocol name up to the query string in the first line of the HTTP request. The web container does not decode this String. For example:

First line of HTTP request	Returned Value
POST /some/path.html HTTP/1.1		/some/path.html
GET http://foo.bar/a.html HTTP/1.0		/a.html
HEAD /xyz?a=b HTTP/1.1		/xyz

To reconstruct an URL with a scheme and host, use HttpUtils.getRequestURL(javax.servlet.http.HttpServletRequest).

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:

HttpUtils.getRequestURL(javax.servlet.http.HttpServletRequest)

getRequestURL

public java.lang.StringBuffer getRequestURL()

Description copied from interface: HttpServletRequest

Reconstructs the URL the client used to make the request. The returned URL contains a protocol, server name, port number, and server path, but it does not include query string parameters.

Because this method returns a StringBuffer, not a string, you can modify the URL easily, for example, to append query parameters.

This method is useful for creating redirect messages and for reporting errors.

Specified by:

getRequestURL in interface HttpServletRequest

Returns:

a StringBuffer object containing the reconstructed URL

getServletPath

public java.lang.String getServletPath()

Description copied from interface: HttpServletRequest

Returns the part of this request's URL that calls the servlet. This includes either the servlet name or a path to the servlet, but does not include any extra path information or a query string. Same as the value of the CGI variable SCRIPT_NAME.

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.

getSession

public HttpSession getSession(boolean create)

Description copied from interface: HttpServletRequest

Returns the current HttpSession associated with this request or, if if there is no current session and create is true, returns a new session.

If create is false and the request has no valid HttpSession, this method returns null.

To make sure the session is properly maintained, you must call this method before the response is committed. If the container is using cookies to maintain session integrity and is asked to create a new session when the response is committed, an IllegalStateException is thrown.

Specified by:

getSession in interface HttpServletRequest

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()

Description copied from interface: HttpServletRequest

Returns the current session associated with this request, or if the request does not have a session, creates one.

Specified by:

getSession in interface HttpServletRequest

Returns:

the HttpSession associated with this request

See Also:

HttpServletRequest.getSession(boolean)

isRequestedSessionIdValid

public boolean isRequestedSessionIdValid()

Description copied from interface: HttpServletRequest

Checks whether the requested session ID is still valid.

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), HttpSessionContext

isRequestedSessionIdFromCookie

public boolean isRequestedSessionIdFromCookie()

Description copied from interface: HttpServletRequest

Checks whether the requested session ID came in as a cookie.

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()

Description copied from interface: HttpServletRequest

Checks whether the requested session ID came in as part of the request URL.

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

public boolean isRequestedSessionIdFromUrl()

Deprecated.

Specified by:

isRequestedSessionIdFromUrl in interface HttpServletRequest

getAttributeNames

public java.util.Enumeration getAttributeNames()

Description copied from interface: ServletRequest

Returns an Enumeration containing the names of the attributes available to this request. This method returns an empty Enumeration if the request has no attributes available to it.

Specified by:

getAttributeNames in interface ServletRequest

Returns:

an Enumeration of strings containing the names of the request's attributes

getAttribute

public java.lang.Object getAttribute(java.lang.String name)

Description copied from interface: ServletRequest

Returns the value of the named attribute as an Object, or null if no attribute of the given name exists.

Attributes can be set two ways. The servlet container may set attributes to make available custom information about a request. For example, for requests made using HTTPS, the attribute javax.servlet.request.X509Certificate can be used to retrieve information on the certificate of the client. Attributes can also be set programatically using ServletRequest.setAttribute(java.lang.String, java.lang.Object). This allows information to be embedded into a request before a RequestDispatcher call.

Attribute names should follow the same conventions as package names. This specification reserves names matching java.*, javax.*, and sun.*.

Specified by:

getAttribute in interface ServletRequest

Parameters:

name - a String specifying the name of the attribute

Returns:

an Object containing the value of the attribute, or null if the attribute does not exist

setAttribute

public void setAttribute(java.lang.String name,
                         java.lang.Object value)

Description copied from interface: ServletRequest

Stores an attribute in this request. Attributes are reset between requests. This method is most often used in conjunction with RequestDispatcher.

Attribute names should follow the same conventions as package names. Names beginning with java.*, javax.*, and com.sun.*, are reserved for use by Sun Microsystems.
If the value passed in is null, the effect is the same as calling ServletRequest.removeAttribute(java.lang.String).

Specified by:

setAttribute in interface ServletRequest

Parameters:

name - a String specifying the name of the attribute

value - the Object to be stored

removeAttribute

public void removeAttribute(java.lang.String name)

Description copied from interface: ServletRequest

Removes an attribute from this request. This method is not generally needed as attributes only persist as long as the request is being handled.

Attribute names should follow the same conventions as package names. Names beginning with java.*, javax.*, and com.sun.*, are reserved for use by Sun Microsystems.

Specified by:

removeAttribute in interface ServletRequest

Parameters:

name - a String specifying the name of the attribute to remove

setCharacterEncoding

public void setCharacterEncoding(java.lang.String encoding)
                          throws java.io.UnsupportedEncodingException

Description copied from interface: ServletRequest

Overrides the name of the character encoding used in the body of this request. This method must be called prior to reading request parameters or reading input using getReader().

Specified by:

setCharacterEncoding in interface ServletRequest

Throws:

java.io.UnsupportedEncodingException - if this is not a valid encoding

getCharacterEncoding

public java.lang.String getCharacterEncoding()

Description copied from interface: ServletRequest

Returns the name of the character encoding used in the body of this request. This method returns null if the request does not specify a character encoding

Specified by:

getCharacterEncoding in interface ServletRequest

Returns:

a String containing the name of the chararacter encoding, or null if the request does not specify a character encoding

getContentLength

public int getContentLength()

Description copied from interface: ServletRequest

Returns the length, in bytes, of the request body and made available by the input stream, or -1 if the length is not known. For HTTP servlets, same as the value of the CGI variable CONTENT_LENGTH.

Specified by:

getContentLength in interface ServletRequest

Returns:

an integer containing the length of the request body or -1 if the length is not known

getContentType

public java.lang.String getContentType()

Description copied from interface: ServletRequest

Returns the MIME type of the body of the request, or null if the type is not known. For HTTP servlets, same as the value of the CGI variable CONTENT_TYPE.

Specified by:

getContentType in interface ServletRequest

Returns:

a String containing the name of the MIME type of the request, or null if the type is not known

getInputStream

public ServletInputStream getInputStream()

Description copied from interface: ServletRequest

Retrieves the body of the request as binary data using a ServletInputStream. Either this method or ServletRequest.getReader() may be called to read the body, not both.

Specified by:

getInputStream in interface ServletRequest

Returns:

a ServletInputStream object containing the body of the request

getParameterMap

public java.util.Map getParameterMap()

This method is not recommended as it forces the generation of a non-optimal data structure.

Specified by:

getParameterMap in interface ServletRequest

Returns:

an immutable java.util.Map containing parameter names as keys and parameter values as map values. The keys in the parameter map are of type String. The values in the parameter map are of type String array.

getParameter

public java.lang.String getParameter(java.lang.String name)

Description copied from interface: ServletRequest

Returns the value of a request parameter as a String, or null if the parameter does not exist. Request parameters are extra information sent with the request. For HTTP servlets, parameters are contained in the query string or posted form data.

You should only use this method when you are sure the parameter has only one value. If the parameter might have more than one value, use ServletRequest.getParameterValues(java.lang.String).

If you use this method with a multivalued parameter, the value returned is equal to the first value in the array returned by getParameterValues.

If the parameter data was sent in the request body, such as occurs with an HTTP POST request, then reading the body directly via ServletRequest.getInputStream() or ServletRequest.getReader() can interfere with the execution of this method.

Specified by:

getParameter in interface ServletRequest

Parameters:

name - a String specifying the name of the parameter

Returns:

a String representing the single value of the parameter

See Also:

ServletRequest.getParameterValues(java.lang.String)

getParameterNames

public java.util.Enumeration getParameterNames()

Description copied from interface: ServletRequest

Returns an Enumeration of String objects containing the names of the parameters contained in this request. If the request has no parameters, the method returns an empty Enumeration.

Specified by:

getParameterNames in interface ServletRequest

Returns:

an Enumeration of String objects, each String containing the name of a request parameter; or an empty Enumeration if the request has no parameters

getParameterValues

public java.lang.String[] getParameterValues(java.lang.String name)

Description copied from interface: ServletRequest

Returns an array of String objects containing all of the values the given request parameter has, or null if the parameter does not exist.

If the parameter has a single value, the array has a length of 1.

Specified by:

getParameterValues in interface ServletRequest

Parameters:

name - a String containing the name of the parameter whose value is requested

Returns:

an array of String objects containing the parameter's values

See Also:

ServletRequest.getParameter(java.lang.String)

getProtocol

public java.lang.String getProtocol()

Description copied from interface: ServletRequest

Returns the name and version of the protocol the request uses in the form protocol/majorVersion.minorVersion, for example, HTTP/1.1. For HTTP servlets, the value returned is the same as the value of the CGI variable SERVER_PROTOCOL.

Specified by:

getProtocol in interface ServletRequest

Returns:

a String containing the protocol name and version number

getScheme

public java.lang.String getScheme()

Description copied from interface: ServletRequest

Returns the name of the scheme used to make this request, for example, http, https, or ftp. Different schemes have different rules for constructing URLs, as noted in RFC 1738.

Specified by:

getScheme in interface ServletRequest

Returns:

a String containing the name of the scheme used to make this request

getServerName

public java.lang.String getServerName()

Description copied from interface: ServletRequest

Returns the host name of the server that received the request. For HTTP servlets, same as the value of the CGI variable SERVER_NAME.

Specified by:

getServerName in interface ServletRequest

Returns:

a String containing the name of the server to which the request was sent

getServerPort

public int getServerPort()

Description copied from interface: ServletRequest

Returns the port number on which this request was received. For HTTP servlets, same as the value of the CGI variable SERVER_PORT.

Specified by:

getServerPort in interface ServletRequest

Returns:

an integer specifying the port number

getReader

public java.io.BufferedReader getReader()

Description copied from interface: ServletRequest

Retrieves the body of the request as character data using a BufferedReader. The reader translates the character data according to the character encoding used on the body. Either this method or ServletRequest.getInputStream() may be called to read the body, not both.

Specified by:

getReader in interface ServletRequest

Returns:

a BufferedReader containing the body of the request

See Also:

ServletRequest.getInputStream()

getRemoteAddr

public java.lang.String getRemoteAddr()

Description copied from interface: ServletRequest

Returns the Internet Protocol (IP) address of the client that sent the request. For HTTP servlets, same as the value of the CGI variable REMOTE_ADDR.

Specified by:

getRemoteAddr in interface ServletRequest

Returns:

a String containing the IP address of the client that sent the request

getRemoteHost

public java.lang.String getRemoteHost()

Description copied from interface: ServletRequest

Returns the fully qualified name of the client that sent the request. If the engine cannot or chooses not to resolve the hostname (to improve performance), this method returns the dotted-string form of the IP address. For HTTP servlets, same as the value of the CGI variable REMOTE_HOST.

Specified by:

getRemoteHost in interface ServletRequest

Returns:

a String containing the fully qualified name of the client

getRealPath

public java.lang.String getRealPath(java.lang.String path)

Deprecated. As of Version 2.1 of the Java Servlet API, use ServletContext.getRealPath(java.lang.String) instead.

Specified by:

getRealPath in interface ServletRequest

getRequestDispatcher

public RequestDispatcher getRequestDispatcher(java.lang.String url)

Description copied from interface: ServletRequest

Returns a RequestDispatcher object that acts as a wrapper for the resource located at the given path. A RequestDispatcher object can be used to forward a request to the resource or to include the resource in a response. The resource can be dynamic or static.

The pathname specified may be relative, although it cannot extend outside the current servlet context. If the path begins with a "/" it is interpreted as relative to the current context root. This method returns null if the servlet container cannot return a RequestDispatcher.

The difference between this method and ServletContext.getRequestDispatcher(java.lang.String) is that this method can take a relative path.

Specified by:

getRequestDispatcher in interface ServletRequest

Parameters:

url - a String specifying the pathname to the resource

Returns:

a RequestDispatcher object that acts as a wrapper for the resource at the specified path

See Also:

RequestDispatcher, ServletContext.getRequestDispatcher(java.lang.String)

toString

public java.lang.String toString()

Overrides:

toString in class java.lang.Object

unwrap

public static ServletHttpRequest unwrap(ServletRequest request)

Unwrap a ServletRequest.

Parameters:

request -

Returns:

The core ServletHttpRequest which must be the underlying request object

See Also:

ServletRequestWrapper, HttpServletRequestWrapper