Which methods can be used to read HTTP header in your JSP program.

JSPJava 8Object Oriented ProgrammingProgramming

The request object provides methods to get HTTP header information including form data, cookies, HTTP methods, etc.

Following table lists out the important methods that can be used to read HTTP header in your JSP program. These methods are available with HttpServletRequest object which represents client request to webserver.

Sr.No.Method & Description
1Cookie[] getCookies()
Returns an array containing all of the Cookie objects the client sent with this request.
2Enumeration getAttributeNames()
Returns an Enumeration containing the names of the attributes available to this request.
3Enumeration getHeaderNames()
Returns an enumeration of all the header names this request contains.
4Enumeration getParameterNames()
Returns an enumeration of String objects containing the names of the parameters contained in this request.
5HttpSession getSession()
Returns the current session associated with the this request, or if the request does not have a session, creates one.
6HttpSession getSession(boolean create)
Returns the current HttpSession associated with the this request or, if if there is no current session and create is true, returns a new session.
7Locale getLocale()
Returns the preferred Locale that the client will accept content in, based on the Accept-Language header.
8Object getAttribute(String name)
Returns the value of the named attribute as an Object, or null if no attribute of the given name exists.
9ServletInputStream getInputStream()
Retrieves the body of the request as binary data using a ServletInputStream.
10String getAuthType()
Returns the name of the authentication scheme used to protect the servlet, for example, "BASIC" or "SSL," or null if the JSP was not protected.
11String getCharacterEncoding()
Returns the name of the character encoding used in the body of this request.
12String getContentType()
Returns the MIME type of the body of the request, or null if the type is not known.
13String getContextPath()
Returns the portion of the request URI that indicates the context of the request.
14String getHeader(String name)
Returns the value of the specified request header as a String.
15String getMethod()
Returns the name of the HTTP method with which this request was made, for example, GET, POST, or PUT.
16String getParameter(String name)
Returns the value of a request parameter as a String, or null if the parameter does not exist.
17String getPathInfo()
Returns any extra path information associated with the URL the client sent when it made this request.
18String getProtocol()
Returns the name and version of the protocol the request uses.
19String getQueryString()
Returns the query string that is contained in the request URL after the path.
20String getRemoteAddr()
Returns the Internet Protocol (IP) address of the client that sent the request.
21String getRemoteHost()
Returns the fully qualified name of the client that sent the request.
22String 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.
23String 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.
24String getRequestedSessionId()
Returns the session ID specified by the client.
25String getServletPath()
Returns the part of this request's URL that calls the JSP.
26String[] getParameterValues(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.
27boolean isSecure()
Returns a boolean indicating whether this request was made using a secure channel, such as HTTPS.
28int 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.
29int getIntHeader(String name)
Returns the value of the specified request header as an int.
30int getServerPort()
Returns the port number on which this request was received.
raja
Published on 20-Mar-2019 06:49:53
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