Overview
--------

"The resource filtering is designed to filter rest resources. By applying filters you can restrict or allow access to a specific resource determined by a path, method and/or headers."

Example
-------

```C++
#include <string>
#include <memory>
#include <cstdlib>
#include <restbed>

using namespace std;
using namespace restbed;

void get_xml_method_handler( const shared_ptr< Session > session )
{
    const multimap< string, string > headers
    {
        { "Content-Length", "30" },
        { "Content-Type", "application/xml" }
    };
    
    session->close( 200, "<hello><world></world></hello>", headers );
}

void get_json_method_handler( const shared_ptr< Session > session )
{
    const multimap< string, string > headers
    {
        { "Content-Length", "23" },
        { "Content-Type", "application/json" }
    };
    
    session->close( 200, "{ \"Hello\": \", World!\" }", headers );
}

void failed_filter_validation_handler( const shared_ptr< Session > session )
{
    session->close( 400 );
}

int main( const int, const char** )
{
    auto resource = make_shared< Resource >( );
    resource->set_path( "/resource" );
    resource->set_failed_filter_validation_handler( failed_filter_validation_handler );
    resource->set_method_handler( "GET", { { "Accept", "application/xml" }, { "Content-Type", "application/xml" } }, &get_xml_method_handler );
    resource->set_method_handler( "GET", { { "Accept", "application/json" }, { "Content-Type", "application/json" } }, &get_json_method_handler );
    
    auto settings = make_shared< Settings >( );
    settings->set_port( 1984 );
    settings->set_default_header( "Connection", "close" );
    
    Service service;
    service.publish( resource );
    service.start( settings );
    
    return EXIT_SUCCESS;
}
```

Build
-----

> $ clang++ -o example example.cpp -l restbed

Execution
---------

> $ ./example
>
> $ curl -w'\n' -v -XGET 'http://localhost:1984/resource' -H'Accept: application/json'
>
> $ curl -w'\n' -v -XGET 'http://localhost:1984/resource' -H'Accept: application/xml'
>
> $ curl -w'\n' -v -XGET 'http://localhost:1984/resource' -H'Accept: application/json' -H'Content-Type: application/json'
>
> $ curl -w'\n' -v -XGET 'http://localhost:1984/resource' -H'Accept: application/xml' -H'Content-Type: application/xml'
>
> $ curl -w'\n' -v -XGET 'http://localhost:1984/resource' -H'Accept: application/json' -H'Content-Type: application/xml'
>
> $ curl -w'\n' -v -XGET 'http://localhost:1984/resource' -H'Accept: application/xml' -H'Content-Type: application/json'
