93 lines
2.3 KiB
Markdown
93 lines
2.3 KiB
Markdown
|
Overview
|
||
|
--------
|
||
|
|
||
|
"Logging is the act of keeping a log. In the simplest case, messages are written to a single log file.
|
||
|
|
||
|
A transaction log is a file (i.e., log) of the communications (i.e., transactions) between a system and the users of that system,[2] or a data collection method that automatically captures the type, content, or time of transactions made by a person from a terminal with that system." -- [Wikipedia](https://en.wikipedia.org/wiki/Log_file)
|
||
|
|
||
|
Example
|
||
|
-------
|
||
|
|
||
|
```C++
|
||
|
#include <memory>
|
||
|
#include <cstdio>
|
||
|
#include <cstdarg>
|
||
|
#include <cstdlib>
|
||
|
#include <restbed>
|
||
|
|
||
|
using namespace std;
|
||
|
using namespace restbed;
|
||
|
|
||
|
class CustomLogger : public Logger
|
||
|
{
|
||
|
public:
|
||
|
void stop( void )
|
||
|
{
|
||
|
return;
|
||
|
}
|
||
|
|
||
|
void start( const shared_ptr< const Settings >& )
|
||
|
{
|
||
|
return;
|
||
|
}
|
||
|
|
||
|
void log( const Level, const char* format, ... )
|
||
|
{
|
||
|
va_list arguments;
|
||
|
va_start( arguments, format );
|
||
|
|
||
|
vfprintf( stderr, format, arguments );
|
||
|
fprintf( stderr, "\n" );
|
||
|
|
||
|
va_end( arguments );
|
||
|
}
|
||
|
|
||
|
void log_if( bool expression, const Level level, const char* format, ... )
|
||
|
{
|
||
|
if ( expression )
|
||
|
{
|
||
|
va_list arguments;
|
||
|
va_start( arguments, format );
|
||
|
log( level, format, arguments );
|
||
|
va_end( arguments );
|
||
|
}
|
||
|
}
|
||
|
};
|
||
|
|
||
|
void get_method_handler( const shared_ptr< Session > session )
|
||
|
{
|
||
|
session->close( OK, "Hello, World!", { { "Content-Length", "13" } } );
|
||
|
}
|
||
|
|
||
|
int main( const int, const char** )
|
||
|
{
|
||
|
auto resource = make_shared< Resource >( );
|
||
|
resource->set_path( "/resource" );
|
||
|
resource->set_method_handler( "GET", get_method_handler );
|
||
|
|
||
|
auto settings = make_shared< Settings >( );
|
||
|
settings->set_port( 1984 );
|
||
|
settings->set_default_header( "Connection", "close" );
|
||
|
|
||
|
Service service;
|
||
|
service.publish( resource );
|
||
|
service.set_logger( make_shared< CustomLogger >( ) );
|
||
|
|
||
|
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'
|