Java HTTP Request request(String url, Map cookies, Map parameters)

Description

request

License

Open Source License

Declaration

public static String request(String url, Map<String, String> cookies, Map<String, String> parameters)
            throws Exception 

Method Source Code

//package com.java2s;
/*/* www.j a  va  2 s  .  c  o  m*/
chatter-bot-api
Copyright (C) 2011 pierredavidbelanger@gmail.com
     
This program is free software: you can redistribute it and/or modify
it under the terms of the GNU Lesser General Public License as published by
the Free Software Foundation, either version 3 of the License, or
(at your option) any later version.
    
This program is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
GNU Lesser General Public License for more details.
    
You should have received a copy of the GNU Lesser General Public License
along with this program.  If not, see <http://www.gnu.org/licenses/>.
*/

import java.io.*;

import java.net.HttpCookie;
import java.net.HttpURLConnection;
import java.net.URL;
import java.net.URLEncoder;

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

public class Main {
    public static String request(String url, Map<String, String> cookies, Map<String, String> parameters)
            throws Exception {
        HttpURLConnection connection = (HttpURLConnection) new URL(url).openConnection();
        connection.setRequestProperty("User-Agent",
                "Mozilla/5.0 (Windows NT 6.1; WOW64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/28.0.1500.95 Safari/537.36");
        if (cookies != null && !cookies.isEmpty()) {
            StringBuilder cookieHeader = new StringBuilder();
            for (String cookie : cookies.values()) {
                if (cookieHeader.length() > 0) {
                    cookieHeader.append(";");
                }
                cookieHeader.append(cookie);
            }
            connection.setRequestProperty("Cookie", cookieHeader.toString());
        }
        connection.setDoInput(true);
        if (parameters != null && !parameters.isEmpty()) {
            connection.setDoOutput(true);
            OutputStreamWriter osw = new OutputStreamWriter(connection.getOutputStream());
            osw.write(parametersToWWWFormURLEncoded(parameters));
            osw.flush();
            osw.close();
        }
        if (cookies != null) {
            for (Map.Entry<String, List<String>> headerEntry : connection.getHeaderFields().entrySet()) {
                if (headerEntry != null && headerEntry.getKey() != null
                        && headerEntry.getKey().equalsIgnoreCase("Set-Cookie")) {
                    for (String header : headerEntry.getValue()) {
                        for (HttpCookie httpCookie : HttpCookie.parse(header)) {
                            cookies.put(httpCookie.getName(), httpCookie.toString());
                        }
                    }
                }
            }
        }
        Reader r = new BufferedReader(new InputStreamReader(connection.getInputStream()));
        StringWriter w = new StringWriter();
        char[] buffer = new char[1024];
        int n = 0;
        while ((n = r.read(buffer)) != -1) {
            w.write(buffer, 0, n);
        }
        r.close();
        return w.toString();
    }

    public static String parametersToWWWFormURLEncoded(Map<String, String> parameters) throws Exception {
        StringBuilder s = new StringBuilder();
        for (Map.Entry<String, String> parameter : parameters.entrySet()) {
            if (s.length() > 0) {
                s.append("&");
            }
            s.append(URLEncoder.encode(parameter.getKey(), "UTF-8"));
            s.append("=");
            s.append(URLEncoder.encode(parameter.getValue(), "UTF-8"));
        }
        return s.toString();
    }
}

Related

1. getRequestContent(String urlText)
2. makeUrlRequest(String surl, String data, String method)
3. request(boolean quiet, String method, URL url, Map body)
4. request(String httpUrl, Map httpArgMap)
5. request(String url, int timeout, String method, Map header)
6. requestData(String url)
7. requestDataFromUrl(URL url, byte[] tosend, String userAgent)
8. saveHttpImage(String requestUrl, String requestMethod, String outputStr, File target)
9. sendGet(String url)