Java HTTP Post post(URL url, Map values)

Description

POST to the specified URL with the specified map of values.

License

Open Source License

Parameter

Parameter	Description
url	The URL
values	The values to implode

Exception

Parameter	Description
IOException	If an error occurred while connecting/receiving the data

Return

The HTTP response

Declaration

public static String post(URL url, Map<String, Object> values) throws IOException 

Method Source Code

//package com.java2s;
/**//from  ww  w.  j a  va2  s .c om
 *  This file is part of Omegle API - Java.
 *
 *  Omegle API - Java is free software: you can redistribute it and/or modify
 *  it under the terms of the GNU General Public License as published by
 *  the Free Software Foundation, either version 3 of the License, or
 *  (at your option) any later version.
 *
 *  Omegle API - Java 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 General Public License for more details.
 *
 *  You should have received a copy of the GNU General Public License
 *  along with  Omegle API - Java.  If not, see <http://www.gnu.org/licenses/>.
 */

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

import java.util.Iterator;
import java.util.Map;
import java.util.Map.Entry;

public class Main {
    /**
     * POST to the specified URL with the specified map of values.
     * 
     * @param url
     *            The URL
     * @param values
     *            The values to implode
     * @return The HTTP response
     * @throws IOException
     *             If an error occurred while connecting/receiving the data
     */
    public static String post(URL url, Map<String, Object> values) throws IOException {
        return post(url, implode(values));
    }

    /**
     * POST to the specified URL with the specified data. Data MUST be encoded
     * if it is sent.
     * 
     * @param url
     *            The URL to send to
     * @param data
     *            The data to send
     * @return The response
     * @throws IOException
     *             If an error occurred while connecting/receiving the data
     */
    public static String post(URL url, String data) throws IOException {
        HttpURLConnection conn = (HttpURLConnection) url.openConnection();
        conn.setRequestProperty("User-Agent", "Omegle API 1.0");
        conn.setDoOutput(true);

        OutputStreamWriter writer = new OutputStreamWriter(conn.getOutputStream());
        writer.write(data);
        writer.flush();

        StringBuilder out = new StringBuilder();

        String line;

        BufferedReader input = new BufferedReader(new InputStreamReader(conn.getInputStream()));
        try {
            while ((line = input.readLine()) != null) {
                out.append(line).append("\n");
            }
        } finally {
            input.close();
        }

        return out.toString().trim();
    }

    /**
     * Implode a map of key -> value pairs to a URL safe string
     * 
     * @param values
     *            The values to implode
     * @return The imploded string
     * @throws IOException
     *             If an error occurred while encoding any values.
     */
    public static String implode(Map<String, Object> values) throws IOException {
        StringBuilder builder = new StringBuilder();
        Iterator<Entry<String, Object>> iterator = values.entrySet().iterator();
        while (iterator.hasNext()) {
            Entry<String, Object> entry = iterator.next();
            builder.append(entry.getKey());

            if (entry.getValue() != null) {
                builder.append("=").append(URLEncoder.encode(entry.getValue().toString(), "UTF-8"));
            }
            if (iterator.hasNext())
                builder.append("&");
        }
        return builder.toString();
    }
}

Related

1. post(String url, Map params, String charset)
2. post(String url, String body, Map headers)
3. post(String url, String payload)
4. post(String url, String postdata, String cookie)
5. Post(URL url, Map fields)
6. post(URL url, String content)
7. post(URL url, String contentType, byte[] data)
8. postCall(JsonObject json, String url)
9. postData(Reader data, URL endpoint, Writer output)