Main.java Source code

Introduction

Here is the source code for Main.java

Source

//package com.java2s;
import java.net.HttpURLConnection;
import java.net.URL;
import java.net.URLConnection;

public class Main {
    /**
     * Return '' or error message if error occurs during URL connection.
     * 
     * @param url   The URL to ckeck
     * @return
     */
    public static String getUrlStatus(String url) {
        URL u;
        URLConnection conn;
        int connectionTimeout = 500;
        try {
            u = new URL(url);
            conn = u.openConnection();
            conn.setConnectTimeout(connectionTimeout);

            // TODO : set proxy

            if (conn instanceof HttpURLConnection) {
                HttpURLConnection httpConnection = (HttpURLConnection) conn;
                httpConnection.setInstanceFollowRedirects(true);
                httpConnection.connect();
                httpConnection.disconnect();
                // FIXME : some URL return HTTP200 with an empty reply from server 
                // which trigger SocketException unexpected end of file from server
                int code = httpConnection.getResponseCode();

                if (code == HttpURLConnection.HTTP_OK) {
                    return "";
                } else {
                    return "Status: " + code;
                }
            } // TODO : Other type of URLConnection
        } catch (Exception e) {
            e.printStackTrace();
            return e.toString();
        }

        return "";
    }
}