Page History
| Cache | ||||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| ||||||||||||||
characterEncodingReturns the name of the character encoding used in the body of this
request. This method returns <code>null</code> if the request
does not specify a character encodingReturns Supported Clients Sample 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. For HTTP servlets,
same as the value of the CGI variable CONTENT_LENGTH.Returns Supported Clients Sample getContentType()Returns the MIME type of the body of the request, or
<code>null</code> if the type is not known. For HTTP servlets,
same as the value of the CGI variable CONTENT_TYPE.Returns Supported Clients Sample getContextPath()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.
<p>It is possible that a servlet container may match a context by
more than one context path. In such cases this method will return the
actual context path used by the request and it may differ from the
path returned by the
javax.servlet.ServletContext#getContextPath() method.
The context path returned by
javax.servlet.ServletContext#getContextPath()
should be considered as the prime or preferred context path of the
application.Returns Supported Clients samSupported Clients Sample getCookies()Returns an array containing all of the <code>Cookie</code>
objects the client sent with this request.
This method returns an empty array if no cookies were sent.Returns Supported Clients Sample getDateHeader(name)Returns the value of the specified request header
as a <code>long</code> value that represents a
<code>Date</code> object. Use this method with
headers that contain dates, such as
<code>If-Modified-Since</code>.
<p>The date is returned as
the number of milliseconds since January 1, 1970 GMT.
The header name is case insensitive.
<p>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 <code>IllegalArgumentException</code>.Parameters Returns Supported Clients Supported Clients Sample getHeader(String)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.
If there are multiple headers with the same name, this method returns the first head in the request.
The header name is case insensitive. You can use this method with any request header.Parameters Returns Supported Clients Sample getHeaderNames()Returns an enumeration of all the header names
this request contains. If the request has no
headers, this method returns an empty enumeration.
<p>Some servlet containers do not allow
servlets to access headers using this method, in
which case this method returns <code>null</code>Returns Supported Clients Sample getHeaders(name)Returns all the values of the specified request header
as an array of <code>String</code> objects.
<p>Some headers, such as <code>Accept-Language</code> can be sent
by clients as several headers each with a different value rather than
sending the header as a comma separated list.
<p>If the request did not include any headers
of the specified name, this method returns an empty
array.
The header name is case insensitive. You can use
this method with any request header.Parameters Returns Supported Clients sIndentSmartClient,Supported Clients Sample getIntHeader(name)Returns the value of the specified request header
as an <code>int</code>. 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 <code>NumberFormatException</code>.
<p>The header name is case insensitive.Parameters Returns Supported Clients Sample getLocalAddr()Returns the Internet Protocol (IP) address of the interface on
which the request was received.Returns Supported Clients Sample getLocalName()Returns the host name of the Internet Protocol (IP) interface on
which the request was received.Returns Supported Clients Sample getLocalPort()Returns the Internet Protocol (IP) port number of the interface
on which the request was received.Returns Supported Clients Sample getLocaleLanguageTag()Returns the preferred <code>Locale</code> 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.
Returns a well-formed IETF BCP 47 language tag representing
this locale.Returns Supported Clients Sample getLocalesLanguageTags()Returns an array of <code>Locale</code> 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 array containing one
<code>Locale</code>, the default locale for the server.
Returns well-formed IETF BCP 47 language tags representing
the locales.Returns Supported Clients Sample getMethod()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.Returns Supported Clients Sample getParameter(name)Returns the value of a request parameter as a <code>String</code>,
or <code>null</code> 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.
<p>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 #getParameterValues(String).
<p>If you use this method with a multivalued
parameter, the value returned is equal to the first value
in the array returned by <code>getParameterValues</code>.
<p>If the parameter data was sent in the request body, such as occurs
with an HTTP POST request, then reading the body directly via
#getInputStream or #getReader can interfere
with the execution of this method.Parameters Returns Supported Clients Sample getParameterMap()Returns an object of the parameters of this request.
<p>Request parameters are extra information sent with the request.
For HTTP servlets, parameters are contained in the query string or
posted form data.Returns Supported Clients Sample getParameterNames()Returns an array of <code>String</code>
objects containing the names of the parameters contained
in this request. If the request has
no parameters, the method returns an empty array.Returns Supported Clients Sample getParameterValues(name)Returns an array of <code>String</code> objects containing
all of the values the given request parameter has, or
<code>null</code> if the parameter does not exist.
<p>If the parameter has a single value, the array has a length
of 1.Parameters Returns sIndentReturns Supported Clients Sample getPathInfo()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 and will start with
a "/" character.
<p>This method returns <code>null</code> if there
was no extra path information.
<p>Same as the value of the CGI variable PATH_INFO.Returns Supported Clients Sample getPathTranslated()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.
<p>If the URL does not have any extra path information,
this method returns <code>null</code> or the servlet container
cannot translate the virtual path to a real path for any reason
(such as when the web application is executed from an archive).
The web container does not decode this string.Returns Supported Clients Sample getProtocol()Returns the name and version of the protocol the request uses
in the form <i>protocol/majorVersion.minorVersion</i>, for
example, HTTP/1.1. For HTTP servlets, the value
returned is the same as the value of the CGI variable
<code>SERVER_PROTOCOL</code>.Returns Supported Clients Sample getQueryString()Returns the query string that is contained in the request
URL after the path. This method returns <code>null</code>
if the URL does not have a query string. Same as the value
of the CGI variable QUERY_STRING.Returns Supported Clients Sample getRealPath(path)Gets the <i>real</i> path corresponding to the given
<i>virtual</i> path.Parameters Returns Supported Clients Sample getRemoteAddr()Returns the Internet Protocol (IP) address of the client
or last proxy that sent the request.
For HTTP servlets, same as the value of the
CGI variable <code>REMOTE_ADDR</code>.Returns sIndentReturns Supported Clients Sample getRemoteHost()Returns the fully qualified name of the client
or the last proxy 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
<code>REMOTE_HOST</code>.Returns Supported Clients Sample getRemotePort()Returns the Internet Protocol (IP) source port of the client
or last proxy that sent the request.Returns Supported Clients Sample 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.
The web container does not decode this String.
For example:
<table summary="Examples of Returned Values">
<tr align=left><th>First line of HTTP request </th>
<th> Returned Value</th>
<tr><td>POST /some/path.html HTTP/1.1<td><td>/some/path.html
<tr><td>GET http://foo.bar/a.html HTTP/1.0
<td><td>/a.html
<tr><td>HEAD /xyz?a=b HTTP/1.1<td><td>/xyz
</table>Returns Supported Clients Sample getRequestURL()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. <p>If this request has been forwarded using javax.servlet.RequestDispatcher#forward(ServletRequest,ServletResponse), the server path in the reconstructed URL must reflect the path used to obtain the RequestDispatcher, and not the server path specified by the client. <p>This method is useful for creating redirect messages and for reporting errors. Returns Supported Clients Sample getScheme()Returns the name of the scheme used to make this request,
for example,
<code>http</code>, <code>https</code>, or <code>ftp</code>.
Different schemes have different rules for constructing URLs,
as noted in RFC 1738.Returns Supported Clients Sample getServerName()Returns the host name of the server to which the request was sent.
It is the value of the part before ":" in the <code>Host</code>
header value, if any, or the resolved server name, or the server IP
address.Returns Supported Clients Sample getServerPort()Returns the port number to which the request was sent.
It is the value of the part after ":" in the <code>Host</code>
header value, if any, or the server port where the client connection
was accepted on.Returns Supported Clients Sample getServletPath()Returns the part of this request's URL that calls
the servlet. This path starts with a "/" character
and 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.
<p>This method will return an empty string ("") if the
servlet used to process this request was matched using
the "/*" pattern.Returns Supported Clients Sample isSecure()Returns a boolean indicating whether this request was made using a
secure channel, such as HTTPS.Returns Supported Clients Sample |
Overview
Content Tools
Activity