public class HTTPClient {

	public static final String GET = "GET";

	public static final String POST = "POST";

	public static final String PUT = "PUT";

	public static final String DELETE = "DELETE";

	public static String getData(String path) throws Exception {

		String responseData = visitWithoutParam(path, GET);

		return responseData;

	}

	public static String postData(String path, String data) throws Exception {

		String responseData = visitWithParam(path, POST, data);

		return responseData;

	}

	public static String putData(String path, String data) throws Exception {

		return "To do put data";

	}

	public static String deleteData(String path) throws Exception {

		return "To do delete data";

	}

	public static String visitWithParam(String path, String method, String body) throws Exception{

		InputStream inputStream = null;

		BufferedReader bufferedReader = null;

		try {

			URL url = new URL(path);

			HttpURLConnection httpURLConnection = (HttpURLConnection) url.openConnection();

			httpURLConnection.setDoInput(true);

			httpURLConnection.setDoOutput(true);

			httpURLConnection.setUseCaches(false);

			httpURLConnection.setRequestMethod(method);

			httpURLConnection.setRequestProperty("Content-Type", "application/json");

			httpURLConnection.setRequestProperty("charset", "utf-8");

			httpURLConnection.setRequestProperty("Content-Length", Integer.toString(body.getBytes().length));

			DataOutputStream dataOutputStream = new DataOutputStream(httpURLConnection.getOutputStream());

			dataOutputStream.writeBytes(body);

			dataOutputStream.flush();

			dataOutputStream.close();

			inputStream = httpURLConnection.getInputStream();

			bufferedReader = new BufferedReader(new InputStreamReader(inputStream));

			StringBuilder stringBuilder = new StringBuilder();

			String line = null;

			while((line = bufferedReader.readLine()) != null)

				stringBuilder.append(line);

			return stringBuilder.toString();

		} catch (Exception e) {

			throw new Exception(e);

		} finally {

			// no need to change null actually

			try {

				if(bufferedReader != null) bufferedReader.close();

				if(inputStream != null) inputStream.close();

			} catch (Exception e){

			}

		}

	}

	public static String visitWithoutParam(String path, String method) throws Exception {

		InputStream inputStream = null;

		BufferedReader bufferedReader = null;

		URL url;

		try {

			url = new URL(path);

			HttpURLConnection httpURLConnection = (HttpURLConnection) url.openConnection();

			httpURLConnection.setDoInput(true);

			httpURLConnection.setUseCaches(false);

			httpURLConnection.setRequestMethod(method);

			inputStream = httpURLConnection.getInputStream();

			bufferedReader = new BufferedReader(new InputStreamReader(inputStream));

			StringBuilder stringBuilder = new StringBuilder();

			String line = null;

			while((line = bufferedReader.readLine()) != null)

				stringBuilder.append(line);

			return stringBuilder.toString();

		} catch (Exception e) {

			throw new Exception(e);

		} finally {

			try {

				if(bufferedReader != null) bufferedReader.close();

				if(inputStream != null) inputStream.close();

			} catch (Exception e) {

			}

		}

	}

}