Created
October 23, 2013 14:54
-
-
Save chomado/7120328 to your computer and use it in GitHub Desktop.
簡単なWebクライアント
This file contains bidirectional Unicode text that may be interpreted or compiled differently than what appears below. To review, open the file in an editor that reveals hidden Unicode characters.
Learn more about bidirectional Unicode characters
import java.net.*; | |
public class Connect { | |
public static void main(String[] args) { | |
String server_name = "localhost"; | |
if (args.length > 0) server_name = args[0]; | |
try { | |
Socket sock = new Socket(server_name, 80); | |
System.out.println("Connected to " + server_name); | |
// do something | |
sock.close(); | |
} catch (UnknownHostException e) { | |
System.err.println("unknown host : " + server_name); | |
} catch (NoRouteToHostException e) { | |
System.err.println("unreachable : " + server_name); | |
} catch (ConnectException e) { | |
System.err.println("connect refused : " + server_name); | |
} catch (java.io.IOException e) { | |
e.printStackTrace(); | |
} | |
} | |
} | |
// 実行: | |
// % java Connect www.github.com | |
// Connected to www.github.com // Webサーバーが動いているホスト | |
// % java Connect www.githubaaaaaaa.com | |
// unknown host : www.githubaaaaaaa.com // 存在しないホスト | |
// % java Connect xx.tsuda.ac.jp | |
// (めっちゃ時間かかって) | |
// connect refused : xx.tsuda.ac.jp // DNSに登録だけされているが存在しないホスト |
Sign up for free
to join this conversation on GitHub.
Already have an account?
Sign in to comment