Java URL Download get(String url, int timeout, Map header)

Description

Method to make a GET request to the specified url

License

Open Source License

Parameter

Parameter	Description
url	URL to make the request on
timeout	The request timeout
header	The request header (can be null)

Exception

Parameter	Description
IOException	an exception

Return

Contents, each list entry represents a new line

Declaration

public static List<String> get(String url, int timeout, Map header) throws IOException 

Method Source Code

//package com.java2s;
//License from project: Open Source License 

import java.io.BufferedReader;
import java.io.IOException;
import java.io.InputStreamReader;
import java.net.HttpURLConnection;
import java.net.URL;

import java.util.ArrayList;
import java.util.List;
import java.util.Map;

public class Main {
    /**//from   w w  w .j a v  a  2s . c o m
     * Method to make a GET request to the specified url
     * @param url URL to make the request on
     * @param timeout The request timeout
     * @param header The request header (can be null)
     * @return Contents, each list entry represents a new line
     * @throws IOException
     */
    public static List<String> get(String url, int timeout, Map header) throws IOException {
        return request(url, timeout, "GET", header);
    }

    private static List<String> request(String url, int timeout, String method, Map header) throws IOException {
        if (!url.contains("http://") && !url.contains("https://"))
            url = "http://" + url;
        URL input = new URL(url);
        HttpURLConnection connection = (HttpURLConnection) input.openConnection();
        connection.setConnectTimeout(timeout);
        connection.setRequestMethod(method);
        if (header != null) {
            for (Object key : header.keySet())
                connection.setRequestProperty(String.valueOf(key), String.valueOf(header.get(key)));
        }
        BufferedReader in = new BufferedReader(new InputStreamReader(connection.getInputStream()));
        connection.connect();
        String temp;
        List<String> read = new ArrayList<String>();
        while ((temp = in.readLine()) != null)
            read.add(temp);
        in.close();
        return read;
    }
}

Related

1. fetchURLContents(String url)
2. get(String url)
3. get(String url)
4. get(String url)
5. get(String url)
6. get(String url, Map headers)
7. get(String url, Map params)
8. get(String url, String encoding)
9. get(String urlStr)