Filter Class Reference

The Filter class works like a filter. You can use this class to validate sessions or measuring runtime of a specific method, for example. To use this class, you will need to create a derived class and reconstruct the doFilter method, after this, you will need to configure it into the ConfigureCppWebServer, using the setFilter method. More...

#include <filter.h>

Public Member Functions
virtual	~Filter ()
	Virtual destructor.
virtual void	doFilter (CWF::Request &request, CWF::Response &response, FilterChain &chain)
	This method will be called always that the CppWebServer receives a requisition. More...

Detailed Description

The Filter class works like a filter. You can use this class to validate sessions or measuring runtime of a specific method, for example. To use this class, you will need to create a derived class and reconstruct the doFilter method, after this, you will need to configure it into the ConfigureCppWebServer, using the setFilter method.

Member Function Documentation

doFilter()

virtual void Filter::doFilter ( CWF::Request &  request, CWF::Response &  response, FilterChain &  chain  )

inlinevirtual

This method will be called always that the CppWebServer receives a requisition.

Parameters

request	: This is a reference to the Request.
response	: This is a reference to the Response.
chain	: This is a reference to the FilterChain.

Example

//----loginfilter.h-----

#ifndef LOGINFILTER_H
#define LOGINFILTER_H

#include "cwf/filter.h"

class LoginFilter : public CWF::Filter
{
public:
    void doFilter(CWF::Request &request, CWF::Response &response, CWF::FilterChain &chain)
    {
        QString url = request.getRequestURL();
        if(url.endsWith(".css") || url.endsWith(".png") || url.endsWith(".jpg"))
        {
            chain.doFilter(request, response);
        }
        else if(url != "/login")
        {
            if(request.getSession().getAttribute("user") == nullptr || request.getSession().isExpired())
            {
                request.getRequestDispatcher("/pages/login").forward(request, response);
            }
            else
            {
                chain.doFilter(request, response);
            }
         }
         else
         {
             chain.doFilter(request, response);
         }
    }
};

#endif // LOGINFILTER_H

//----main.h-----

#include <filter/loginfilter.h>
#include "cwf/cppwebapplication.h"

int main(int argc, char *argv[])
{
    CWF::CppWebApplication server(argc,
                                  argv,
                                  "PATH_TO_SERVER_FOLDER",
                                  new LoginFilter);

    return server.start();
}

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The documentation for this class was generated from the following file:

• /home/herik/CPPWebFramework/CPPWebFramework/cwf/filter.h