core.RESTCalls.RESTPost.java Source code

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Here is the source code for core.RESTCalls.RESTPost.java

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/**
 * Copyright 2014 SeaClouds
 * Contact: Dionysis Athanasopoulos <dionysiscsuoi@gmail.com>
 *
 *    Licensed under the Apache License, Version 2.0 (the "License");
 *    you may not use this file except in compliance with the License.
 *    You may obtain a copy of the License at
 *
 *        http://www.apache.org/licenses/LICENSE-2.0
 *
 *    Unless required by applicable law or agreed to in writing, software
 *    distributed under the License is distributed on an "AS IS" BASIS,
 *    WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 *    See the License for the specific language governing permissions and
 *    limitations under the License.
 */

package core.RESTCalls;

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

import org.apache.http.HttpResponse;
import org.apache.http.client.HttpClient;
import org.apache.http.client.methods.HttpPost;
import org.apache.http.entity.StringEntity;
import org.apache.http.impl.client.DefaultHttpClient;

public class RESTPost {

    public static String httpPost(String urlStr, String[] paramName, String[] paramVal) throws Exception {

        URL url = new URL(urlStr);
        HttpURLConnection conn = (HttpURLConnection) url.openConnection();
        conn.setRequestMethod("POST");

        conn.setDoOutput(true);
        conn.setDoInput(true);
        conn.setUseCaches(false);
        conn.setAllowUserInteraction(false);
        conn.setRequestProperty("Content-Type", "application/x-www-form-urlencoded");

        OutputStream out = conn.getOutputStream();

        Writer writer = new OutputStreamWriter(out, "UTF-8");

        for (int i = 0; i < paramName.length; i++) {

            writer.write(paramName[i]);
            writer.write("=");
            writer.write(URLEncoder.encode(paramVal[i], "UTF-8"));
            writer.write("&");
        }

        writer.close();
        out.close();

        if (conn.getResponseCode() != 200)
            throw new IOException(conn.getResponseMessage());

        BufferedReader rd = new BufferedReader(new InputStreamReader(conn.getInputStream()));

        StringBuilder sb = new StringBuilder();

        String line;

        while ((line = rd.readLine()) != null)
            sb.append(line + "\n");

        rd.close();

        conn.disconnect();

        return sb.toString();
    }

    public static String httpPost(String urlStr, String data, String type) {

        String result = null;

        if (type == null
                || (type != null && !type.equals("text/plain") && !type.equals("xml") && !type.equals("json"))) {

            System.err.println(
                    "\n[ERROR] RESTPost: Unknown input type (" + type + ") in the Http RESTful post request.");

            return null;
        }

        else {

            try {

                HttpClient client = new DefaultHttpClient();

                HttpPost post = new HttpPost(urlStr);

                StringEntity input = new StringEntity(data);

                if (type.equals("text/plain"))
                    input.setContentType("text/plain");

                else
                    input.setContentType("application/" + type);

                post.setEntity(input);

                HttpResponse response = client.execute(post);

                if (response != null && response.getEntity() != null) {

                    BufferedReader r = new BufferedReader(new InputStreamReader(response.getEntity().getContent()));

                    StringBuilder total = new StringBuilder();

                    String line = null;

                    while ((line = r.readLine()) != null)
                        total.append(line + "\n");

                    result = total.toString();
                }
            }

            catch (Exception ex) {

                ex.printStackTrace();
            }

            return result;
        }
    }

    public static String httpPost(String urlStr, String data) throws Exception {

        String result = null;

        HttpClient client = new DefaultHttpClient();

        HttpPost post = new HttpPost(urlStr);

        StringEntity input = new StringEntity(data);

        post.setEntity(input);

        HttpResponse response = client.execute(post);

        if (response != null && response.getEntity() != null) {

            BufferedReader r = new BufferedReader(new InputStreamReader(response.getEntity().getContent()));

            StringBuilder total = new StringBuilder();

            String line = null;

            while ((line = r.readLine()) != null)
                total.append(line + "\n");

            total.toString();
        }

        return result;
    }

    public static String httpPost(String urlStr) throws Exception {

        HttpClient client = new DefaultHttpClient();

        HttpPost post = new HttpPost(urlStr);

        HttpResponse response = client.execute(post);

        BufferedReader r = new BufferedReader(new InputStreamReader(response.getEntity().getContent()));

        StringBuilder total = new StringBuilder();

        String line = null;

        while ((line = r.readLine()) != null)
            total.append(line + "\n");

        return total.toString();
    }

    public static InputStream httpPostResponse(String urlStr) throws Exception {

        HttpClient client = new DefaultHttpClient();

        HttpPost post = new HttpPost(urlStr);

        HttpResponse response = client.execute(post);

        return response.getEntity().getContent();
    }
}