62 lines
1.9 KiB
Markdown
62 lines
1.9 KiB
Markdown
Overview
|
|
--------
|
|
|
|
"HTTP persistent connection, also called HTTP keep-alive, or HTTP connection reuse, is the idea of using a single TCP connection to send and receive multiple HTTP requests/responses, as opposed to opening a new connection for every single request/response pair. The newer HTTP/2 protocol uses the same idea and takes it further to allow multiple concurrent requests/responses to be multiplexed over a single connection." -- [Wikipedia](https://en.wikipedia.org/wiki/HTTP_persistent_connection)
|
|
|
|
Example
|
|
-------
|
|
|
|
```C++
|
|
#include <string>
|
|
#include <memory>
|
|
#include <cstdlib>
|
|
#include <restbed>
|
|
|
|
using namespace std;
|
|
using namespace restbed;
|
|
|
|
void get_intermittent_method_handler( const shared_ptr< Session > session )
|
|
{
|
|
session->close( OK, "intermittent resource request", { { "Content-Length", "29" }, { "Connection", "close" } } );
|
|
}
|
|
|
|
void get_persistent_method_handler( const shared_ptr< Session > session )
|
|
{
|
|
session->yield( OK, "persistent resource request", { { "Content-Length", "27" }, { "Connection", "keep-alive" } } );
|
|
}
|
|
|
|
int main( const int, const char** )
|
|
{
|
|
auto persistent = make_shared< Resource >( );
|
|
persistent->set_path( "/resources/persistent" );
|
|
persistent->set_method_handler( "GET", get_persistent_method_handler );
|
|
|
|
auto intermittent = make_shared< Resource >( );
|
|
intermittent->set_path( "/resources/intermittent" );
|
|
intermittent->set_method_handler( "GET", get_intermittent_method_handler );
|
|
|
|
auto settings = make_shared< Settings >( );
|
|
settings->set_port( 1984 );
|
|
|
|
Service service;
|
|
service.publish( persistent );
|
|
service.publish( intermittent );
|
|
|
|
service.start( settings );
|
|
|
|
return EXIT_SUCCESS;
|
|
}
|
|
```
|
|
|
|
Build
|
|
-----
|
|
|
|
> $ clang++ -o example example.cpp -l restbed
|
|
|
|
Execution
|
|
---------
|
|
|
|
> $ ./example
|
|
>
|
|
> $ curl -w'\n' -v 'http://localhost:1984/resources/persistent' 'http://localhost:1984/resources/intermittent'
|