first commit

comm/Kernel/src/util/HttpClient.java

@@ -0,0 +1,55 @@
+package util;
+
+import java.io.BufferedReader;
+import java.io.IOException;
+import java.io.InputStream;
+import java.io.InputStreamReader;
+import java.net.HttpURLConnection;
+import java.net.URL;
+
+public class HttpClient {
+	public static String get(String url, int timeout) throws IOException {
+		HttpURLConnection connection = (HttpURLConnection) new URL(url).openConnection();
+		connection.setReadTimeout(timeout);
+		connection.setConnectTimeout(timeout);
+		connection.setRequestMethod("GET");
+
+		connection.connect();
+
+		InputStream is = connection.getInputStream();
+		BufferedReader reader = new BufferedReader(new InputStreamReader(is, "UTF-8"));
+		return readerToString(reader);
+	}
+
+	public static String post(String url, int timeout, String in) throws IOException {
+		HttpURLConnection connection = (HttpURLConnection) new URL(url).openConnection();
+		connection.setReadTimeout(timeout);
+		connection.setConnectTimeout(timeout);
+		connection.setRequestMethod("POST");
+		connection.setRequestProperty("Content-Type", "application/json");
+
+		connection.setDoOutput(true);
+		connection.getOutputStream().write(in.getBytes("UTF-8"));
+		connection.connect();
+
+		InputStream is = connection.getInputStream();
+		BufferedReader reader = new BufferedReader(new InputStreamReader(is, "UTF-8"));
+		return readerToString(reader);
+	}
+
+	private static String readerToString(BufferedReader reader) throws IOException {
+		StringBuffer buffer = new StringBuffer();
+		String line;
+		boolean isFirst = true;
+		while ((line = reader.readLine()) != null) {
+			if (isFirst) {
+				isFirst = false;
+			} else {
+				buffer.append("\r\n");
+			}
+			buffer.append(line);
+		}
+		reader.close();
+		return buffer.toString();
+	}
+}