REST интерфейс генератор фреймворка vibe.d

• Скачать и установить dmd.
• Скачать и установить dub. С этого момента можно программировать на D. Однако нам нужна ide.
• Скачать и установить eclipse.
• Установить ddt.

• Инициализируем проект:

  dub init helloVibe

• Отредактируем dub.json. Добавим туда следующее
  
  

  "libs-posix": ["dl"],
  "versions":  ["VibeCustomMain"],
  "dependencies": 
  {
  	"vibe-d": "~master"
  }
  		

  
  
  
• Затем из директории helloVibe

  dub run

  Поздравляю, ваша первая программа на D заработала.
• Создадим проект в eclipse. И в качестве библиотеки добавим папку source

  %APPDATA%/dub/packages/vibe-d-master/source

  Теперь автодополнение наш помощник.
• Запустим vibe.d. Для этого нам необходимо начать слушать порт и запустить петлю событий. Делается это функциями

  listenHTTP(HTTPServerSettings,URLRouter)

  runEventLoop()

  соответственно. Еще необходимо создать настройки сервера и настроить маршрутизатор.
• Настройки создаем так:
  
  

  
  auto settings = new HTTPServerSettings;
  
  settings.bindAddresses = ["127.0.0.1"];
  
  settings.port = 80;
  		

• Не забываем подключить vibe:

  import vibe.d;

• Маршрутизатор у нас будет включать один адрес, доступный по методу GET
  
  

  
  auto router = new URLRouter;
  
  router.get("/", &index);
  		

  
  
  
• И функция обработчик:
  
  

  
  void index(HTTPServerRequest req, HTTPServerResponse res)
  {
  	res.writeBody("Hello World!");
  }
  		

  
  
  Обработчик может быть как функцией, так и делегатом, что очень удобно и позволяет использовать в качестве обработчиков методы класса. Такая особенность используется как в REST interface генераторе, так и в Web interface генераторе.
• Осталось все вызвать в нужном порядке:
  
  

  
  import std.stdio;
  
  import vibe.d;
  
  void main()
  {
  	writeln("Edit source/app.d to start your project.");
  
  	void index(HTTPServerRequest req, HTTPServerResponse res)
  	{
  		res.writeBody("Hello World!");
  	}
  
  	auto settings = new HTTPServerSettings;
  
  	settings.bindAddresses = ["127.0.0.1"];
  
  	settings.port = 80;
  
  	auto router = new URLRouter;
  
  	router.get("/", &index);
  
  	listenHTTP(settings, router);
  
  	runEventLoop();
  }
  

  
  
  

• dub run

  . Поздравляю, ваш первый сервер на vibe.d готов.

struct Weather
{
	@Label("City identification")
	long id;
	
	@Label("Data receiving time, unix time, GMT")
	ulong dt;
	
	@Label("City name")
	string name;
	
	WCoord coord;
	
	WSys sys;
	
	WMain main;
	
	WWind wind;
	
	WClouds clouds;
	
	//@optional()
	//WConditions[] weather;
	
	@optional()
	WRain rain;
	
	@optional()
	WSnow snow;
}

struct WCoord
{
	@Label("City geo location, lat")
	double lat;
	
	@Label("City geo location, lon")
	double lon;
}

struct WSys
{
	@Label("System parameter, do not use it")
	double message;
	
	@Label("Country (GB, JP etc.)")
	string country;
	
	@Label("Sunrise time, unix, UTC")
	ulong sunrise;
	
	@Label("Sunset time, unix, UTC")
	ulong sunset;
}

struct WMain
{
	@Label("Temperature, Kelvin (subtract 273.15 to convert to Celsius)")
	double temp;
	
	@Label("Humidity, %")
	double humidity;
	
	@Label("Minimum temperature at the moment. This is deviation from current temp that is possible for large cities and megalopolises geographically expanded (use these parameter optionally)")
	double temp_min;
	
	@Label("Maximum temperature at the moment. This is deviation from current temp that is possible for large cities and megalopolises geographically expanded (use these parameter optionally)")
	double temp_max;
	
	@Label("Atmospheric pressure, hPa ")
	double pressure;
	
	@Label("Atmospheric pressure on the sea level, hPa") @optional()
	double sea_level;
	
	@Label("Atmospheric pressure on the ground level, hPa") @optional()
	double grnd_level;	
}

struct WWind
{
	@Label("Wind speed, mps")
	double speed;
	
	@Label("Wind direction, degrees (meteorological)")
	double deg;
	
	@Label("Wind gust, mps") @optional()
	double gust;
}

struct WClouds
{
	@Label("Cloudiness, %")
	double all;
}

struct WConditions
{
	@Label("Weather condition id")
	long id;
	
	@Label("Group of weather parameters (Rain, Snow, Extreme etc.)")
	Weather main;
	
	@Label("Weather condition within the group")
	string description;
	
	@Label("Weather icon id")
	string icon;
}

struct WRain
{
	@Label("Precipitation volume for last 3 hours, mm") @optional()
	double _3h;

}

struct WSnow
{
	@Label("Snow volume for last 3 hours, mm") @optional()
	double _3h;
}
  

void index(HTTPServerRequest req, HTTPServerResponse res)
{
	auto client = new RestInterfaceClient!OpenWeather("http://api.openweathermap.org/data/2.5/");

	auto weather = client.getWeather("Moscow");

	string result = "<html>";

	foreach(each; respond(weather))
	{
		auto writer = res.bodyWriter();

		if (!each.label.empty)
		{
			result ~=format("<b>%s</b>:<br/>\"%s\" = %s<br/>", each.label, each.name, each.value);
		}
		else
		{
			result ~= format("<i>%s</i><br/>", each.name);
		}
	}

	result ~= "</html>";

	res.writeBody(result);
}

import std.traits;
import std.conv;

struct A
{
	string name;

	string value;

	string label;
}

string getLabel(alias ST, alias mem)()
{

	foreach (attr; __traits(getAttributes, __traits(getMember,ST,mem)))
	{
		if (is(typeof(attr) == Label))
		{
			return attr.text;
		}
	}

	return "";

}

A[] respond(ST)(ST st)
{
	A[] ret = new A[0];

	foreach(mem; __traits(derivedMembers, ST))
	{
		static if(is(typeof(__traits(getMember,ST,mem)) == struct))
		{
			ret ~= A(mem,"","");

			ret ~= respond!(typeof(__traits(getMember,ST,mem)))(__traits(getMember,st, mem));
		}
		else
		{
			ret ~= A(mem, to!string(__traits(getMember,st, mem)), getLabel!(ST,mem) );
		}
	}

	return ret;

}
		

import std.traits;
import std.conv;

struct Label
{
	string text;
}

struct A
{
	string name;

	string value;

	string label;
}

string getLabel(alias ST, alias mem)()
{

	foreach (attr; __traits(getAttributes, __traits(getMember,ST,mem)))
	{
		if (is(typeof(attr) == Label))
		{
			return attr.text;
		}
	}

	return "";

}

A[] respond(ST)(ST st)
{
	A[] ret = new A[0];

	foreach(mem; __traits(derivedMembers, ST))
	{
		static if(is(typeof(__traits(getMember,ST,mem)) == struct))
		{
			ret ~= A(mem,"","");

			ret ~= respond!(typeof(__traits(getMember,ST,mem)))(__traits(getMember,st, mem));
		}
		else
		{
			ret ~= A(mem, to!string(__traits(getMember,st, mem)), getLabel!(ST,mem) );
		}
	}

	return ret;

}

struct Weather
{
	@Label("City identification")
	long id;
	
	@Label("Data receiving time, unix time, GMT")
	ulong dt;
	
	@Label("City name")
	string name;
	
	WCoord coord;
	
	WSys sys;
	
	WMain main;
	
	WWind wind;
	
	WClouds clouds;
	
	//@optional()
	//WConditions[] weather;
	
	@optional()
	WRain rain;
	
	@optional()
	WSnow snow;
}

struct WCoord
{
	@Label("City geo location, lat")
	double lat;
	
	@Label("City geo location, lon")
	double lon;
}

struct WSys
{
	@Label("System parameter, do not use it")
	double message;
	
	@Label("Country (GB, JP etc.)")
	string country;
	
	@Label("Sunrise time, unix, UTC")
	ulong sunrise;
	
	@Label("Sunset time, unix, UTC")
	ulong sunset;
}

struct WMain
{
	@Label("Temperature, Kelvin (subtract 273.15 to convert to Celsius)")
	double temp;
	
	@Label("Humidity, %")
	double humidity;
	
	@Label("Minimum temperature at the moment. This is deviation from current temp that is possible for large cities and megalopolises geographically expanded (use these parameter optionally)")
	double temp_min;
	
	@Label("Maximum temperature at the moment. This is deviation from current temp that is possible for large cities and megalopolises geographically expanded (use these parameter optionally)")
	double temp_max;
	
	@Label("Atmospheric pressure, hPa ")
	double pressure;
	
	@Label("Atmospheric pressure on the sea level, hPa") @optional()
	double sea_level;
	
	@Label("Atmospheric pressure on the ground level, hPa") @optional()
	double grnd_level;	
}

struct WWind
{
	@Label("Wind speed, mps")
	double speed;
	
	@Label("Wind direction, degrees (meteorological)")
	double deg;
	
	@Label("Wind gust, mps") @optional()
	double gust;
}

struct WClouds
{
	@Label("Cloudiness, %")
	double all;
}

struct WConditions
{
	@Label("Weather condition id")
	long id;
	
	@Label("Group of weather parameters (Rain, Snow, Extreme etc.)")
	Weather main;
	
	@Label("Weather condition within the group")
	string description;
	
	@Label("Weather icon id")
	string icon;
}

struct WRain
{
	@Label("Precipitation volume for last 3 hours, mm") @optional()
	double _3h;

}

struct WSnow
{
	@Label("Snow volume for last 3 hours, mm") @optional()
	double _3h;
}

interface OpenWeather
{
	Weather getWeather(string q);
}

class OpenWeatherImpl:OpenWeather
{
	Weather getWeather(string q)
	{
		auto client = new RestInterfaceClient!OpenWeather("http://api.openweathermap.org/data/2.5/");

		return client.getWeather(q);
	}
}

import std.stdio;

import vibe.d;

import std.string;

void main()
{
	writeln("Edit source/app.d to start your project.");

	void index(HTTPServerRequest req, HTTPServerResponse res)
	{
		auto client = new RestInterfaceClient!OpenWeather("http://api.openweathermap.org/data/2.5/");

		auto weather = client.getWeather("Moscow");

		string result = "<html>";

		foreach(each; respond(weather))
		{
			auto writer = res.bodyWriter();

			if (!each.label.empty)
			{
				result ~=format("<b>%s</b>:<br/>\"%s\" = %s<br/>", each.label, each.name, each.value);
			}
			else
			{
				result ~= format("<i>%s</i><br/>", each.name);
			}
		}

		result ~= "</html>";

		res.writeBody(result);
	}

	auto settings = new HTTPServerSettings;

	settings.bindAddresses = ["127.0.0.1"];

	settings.port = 80;

	auto router = new URLRouter;

	router.get("/", &index);
	
	router.registerRestInterface(new OpenWeatherImpl);

	listenHTTP(settings, router);

	runEventLoop();
}