What is the use of HttpServletRequestWrapper?

What is the use of HttpServletRequestWrapper?

Class HttpServletRequestWrapper. 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.

What is request getHeader?

The Host request-header field specifies the Internet host and port number of the resource being requested, as obtained from the original URI given by the user or referring resource. request. getHeader(“Host”); will return the value of the “Host” (in your case xxxxx.abcd.com) header in the request.

How do I edit HttpServletRequest?

5 Answers

1. A filter is needed where request will be wrapped.
2. A custom HttpRequestWrapper is needed with all parameter access methods overridden.
3. getInputStream and getReader methods should be redefined as well.
4. Custom class extending ServletInputStream is required since this one is abstract.

What is the purpose of request dispatcher?

The RequestDispatcher interface provides the facility of dispatching the request to another resource it may be html, servlet or jsp. This interface can also be used to include the content of another resource also. It is one of the way of servlet collaboration.

What is the purpose of request dispatcher interface?

The RequestDispatcher interface provides the option of dispatching the client’s request to another web resource, which could be an HTML page, another servlet, JSP etc. It provides the following two methods: public void forward(ServletRequest request, ServletResponse response)throws ServletException, java.

What is request getUserPrincipal ()?

The HttpServletRequest interface provides the following methods that enable you to access security information about the component’s caller:getRemoteUser: Determines the user name with which the client authenticated. getUserPrincipal: Determines the principal name of the current user and returns a java.

Is request getHeader case sensitive?

The docs for getHeader(String) state: The header name is case insensitive. so it sounds like a bug in the container you’re using.

What is the difference between getlocaladdr() and getlocale()?

Retrieves the body of the request as binary data using a ServletInputStream. java.lang.String getLocalAddr() Returns the Internet Protocol (IP) address of the interface on which the request was received. java.util.Locale getLocale() Returns the preferred Localethat the client will accept content in, based on the Accept-Language header.

What is the use of getrealpath in servlet?

As of Version 2.1 of the Java Servlet API, use ServletContext.getRealPath (java.lang.String) instead. Returns the Internet Protocol (IP) address of the client or last proxy that sent the request. Returns the fully qualified name of the client or the last proxy that sent the request.

How to make getscheme work with httpservletrequest?

1) Use HttpServletRequest.getHeader(“x-forwarded-proto”)instead; this only works if your load balancer sets the header correctly (Apache should afaik). 2) Configure a RemoteIpValvein JBoss/Tomcat that will make getScheme()work as expected. Again, this will only work if the load balancer sets the correct headers.

How do I get the Certificate of a servlet request?

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.X509Certificatecan be used to retrieve information on the certificate of the client. Attributes can also be set programatically using ServletRequest#setAttribute.