Java HTTP Post sendPost(String link, String urlParameters)

Description

send Post

License

Open Source License

Declaration

public static String sendPost(String link, String urlParameters) throws Exception 

Method Source Code

//package com.java2s;
/*//  www .jav  a 2  s .  c o  m
 * Copyright (c) 2015, iLearnRW. Licensed under Modified BSD Licence. See licence.txt for details.
 */

import java.io.BufferedReader;

import java.io.InputStreamReader;
import java.io.OutputStreamWriter;

import java.net.HttpURLConnection;
import java.net.URL;

public class Main {
    private static String baseUrl = "http://api.ilearnrw.eu/ilearnrw/";
    private final static char base64Array[] = { 'A', 'B', 'C', 'D', 'E', 'F', 'G', 'H', 'I', 'J', 'K', 'L', 'M',
            'N', 'O', 'P', 'Q', 'R', 'S', 'T', 'U', 'V', 'W', 'X', 'Y', 'Z', 'a', 'b', 'c', 'd', 'e', 'f', 'g', 'h',
            'i', 'j', 'k', 'l', 'm', 'n', 'o', 'p', 'q', 'r', 's', 't', 'u', 'v', 'w', 'x', 'y', 'z', '0', '1', '2',
            '3', '4', '5', '6', '7', '8', '9', '+', '/' };

    public static String sendPost(String link, String urlParameters) throws Exception {
        String url = baseUrl + link;

        URL obj = new URL(url);
        HttpURLConnection con = (HttpURLConnection) obj.openConnection();

        con.setRequestMethod("POST");
        con.setRequestProperty("Authorization", userNamePasswordBase64("api", "api"));

        con.setRequestProperty("Content-Type", "application/json;charset=utf-8");
        con.setDoOutput(true);
        OutputStreamWriter wr = new OutputStreamWriter(con.getOutputStream(), "UTF8");

        wr.write(urlParameters);
        wr.flush();
        wr.close();
        int responseCode = con.getResponseCode();
        System.out.println("\nSending 'POST' request to URL : " + url);
        System.out.println("Post parameters : " + urlParameters);
        System.out.println("Response Code : " + responseCode);

        BufferedReader in = new BufferedReader(new InputStreamReader(con.getInputStream(), "UTF-8"));
        String inputLine;
        StringBuffer response = new StringBuffer();

        while ((inputLine = in.readLine()) != null) {
            response.append(inputLine);
        }
        in.close();

        return response.toString();
    }

    public static String userNamePasswordBase64(String username, String password) {
        return "Basic " + base64Encode(username + ":" + password);
    }

    private static String base64Encode(String string) {
        String encodedString = "";
        byte bytes[] = string.getBytes();
        int i = 0;
        int pad = 0;
        while (i < bytes.length) {
            byte b1 = bytes[i++];
            byte b2;
            byte b3;
            if (i >= bytes.length) {
                b2 = 0;
                b3 = 0;
                pad = 2;
            } else {
                b2 = bytes[i++];
                if (i >= bytes.length) {
                    b3 = 0;
                    pad = 1;
                } else
                    b3 = bytes[i++];
            }
            byte c1 = (byte) (b1 >> 2);
            byte c2 = (byte) (((b1 & 0x3) << 4) | (b2 >> 4));
            byte c3 = (byte) (((b2 & 0xf) << 2) | (b3 >> 6));
            byte c4 = (byte) (b3 & 0x3f);
            encodedString += base64Array[c1];
            encodedString += base64Array[c2];
            switch (pad) {
            case 0:
                encodedString += base64Array[c3];
                encodedString += base64Array[c4];
                break;
            case 1:
                encodedString += base64Array[c3];
                encodedString += "=";
                break;
            case 2:
                encodedString += "==";
                break;
            }
        }
        return encodedString;
    }
}

Related

1. put(URL host, String endpoint, String customer, String name, String version, InputStream in)
2. putPOST(HttpURLConnection h, String query)
3. requestPost(final String remoteUrl, final byte[] content)
4. sendJson(URL url, String method, String data)
5. sendJsonData(final HttpURLConnection connection, final String data)
6. sendPost(String url, String data)
7. sendPost(String url, String urlParameters)
8. sendPost(String webURL, HashMap postOptions)
9. sendPostRequest(Reader data, URL endpoint, Writer output)