Java HTTP Read getInputStreamFromURL(String urlname)

Description

get Input Stream From URL

License

LGPL

Parameter

Parameter	Description
urlname	a parameter

Declaration

public static InputStream getInputStreamFromURL(String urlname)
        throws Exception 

Method Source Code

//package com.java2s;
//License from project: LGPL 

import java.io.IOException;
import java.io.InputStream;
import java.net.HttpURLConnection;
import java.net.InetSocketAddress;
import java.net.MalformedURLException;
import java.net.Proxy;
import java.net.URL;

public class Main {
    /**/* w w  w .  j a  va  2s .  c o  m*/
     * 
     * @param urlname
     * @return
     */
    public static InputStream getInputStreamFromURL(String urlname)
            throws Exception {
        InputStream stream = null;

        try {
            URL url = new URL(urlname);
            java.net.HttpURLConnection connection = (HttpURLConnection) url
                    .openConnection();

            if (connection.getResponseCode() != 200
                    && connection.getResponseCode() != 404
                    && connection.getResponseCode() != 202) {
                throw new IOException(connection.getResponseMessage());
            }
            stream = connection.getInputStream();
        } catch (MalformedURLException mue) {
            System.err.println("Error: Could create URL object!");
            throw new Exception();
        } catch (IOException e) {
            System.err.println("Error: Could not open URL connection!");
            System.err.println(urlname);
            throw new Exception();
        }

        return stream;
    }

    /**
     * 
     * @param urlname
     * @return
     */
    public static InputStream getInputStreamFromURL(String urlname,
            Object proxyServer, Object proxyPort) throws Exception {
        InputStream stream = null;

        try {
            URL url = new URL(urlname);
            java.net.HttpURLConnection connection = null;
            Proxy proxy = null;
            try {
                if (proxyServer != null && proxyPort != null) {
                    proxy = new Proxy(Proxy.Type.HTTP,
                            new InetSocketAddress((String) proxyServer,
                                    (Integer) proxyPort));
                }
            } catch (Exception e1) {
                System.err.println("Could not set proxy. Check settings.");
            }

            if (proxy == null)
                connection = (HttpURLConnection) url.openConnection();
            else
                connection = (HttpURLConnection) url.openConnection(proxy);

            if (connection.getResponseCode() != 200
                    && connection.getResponseCode() != 404
                    && connection.getResponseCode() != 202) {
                throw new IOException(connection.getResponseMessage());
            }
            stream = connection.getInputStream();
        } catch (MalformedURLException mue) {
            System.err.println("Error: Could create URL object!");
            throw new Exception();
        } catch (IOException e) {
            System.err.println("Error: Could not open URL connection!");
            System.err.println(urlname);
            throw new Exception();
        }

        return stream;
    }
}

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