Liferay Helper used in a Play Framework App to query the liferay json api

LiferayHelper.java

/* Author: Francisco Aranda ([email protected]) */

package controllers;

import org.apache.http.HttpHost;
import org.apache.http.HttpResponse;
import org.apache.http.NameValuePair;
import org.apache.http.auth.AuthScope;
import org.apache.http.auth.UsernamePasswordCredentials;
import org.apache.http.client.entity.UrlEncodedFormEntity;
import org.apache.http.client.methods.HttpGet;
import org.apache.http.client.methods.HttpPost;
import org.apache.http.client.utils.URLEncodedUtils;
import org.apache.http.impl.client.DefaultHttpClient;
import org.apache.http.message.BasicNameValuePair;
import org.apache.http.params.BasicHttpParams;
import org.apache.http.params.HttpParams;
import org.h2.util.IOUtils;

import java.io.*;
import java.net.URL;
import java.net.URLConnection;
import java.util.ArrayList;
import java.util.List;

public class LiferayHelper {

   private static String scopeGroupId = "10157";
   private static String companyId = "10132";
   private static String portletId = "56_INSTANCE_58Fo"
   private static String host = "liferay.com";
   private static String user = "user";
   private static String pass = "pass";
   private static int port = 80;
   private static String endpoint = "/tunnel-web/secure/json";

    public static String convertStreamToString(InputStream is)
            throws IOException {

        if (is != null) {
            Writer writer = new StringWriter();

            char[] buffer = new char[1024];
            try {
                Reader reader = new BufferedReader(
                        new InputStreamReader(is, "UTF-8"));
                int n;
                while ((n = reader.read(buffer)) != -1) {
                    writer.write(buffer, 0, n);
                }
            } finally {
                is.close();
            }
            return writer.toString();
        } else {
            return "";
        }
    }

    public static String service(String clase, String method) throws Exception {

        
        HttpHost targetHost = new HttpHost(LiferayHelper->host, LiferayHelper->port, "http");
        DefaultHttpClient httpclient = new DefaultHttpClient();
        httpclient.getCredentialsProvider().setCredentials(
                new AuthScope(targetHost.getHostName(), targetHost.getPort()),
                new UsernamePasswordCredentials(LiferayHelper->user,LiferayHelper->pass));

        HttpPost post = new HttpPost(LiferayHelper->endpoint);

        List<NameValuePair> params = new ArrayList<NameValuePair>();
        params.add(new BasicNameValuePair("serviceClassName", clase));
        params.add(new BasicNameValuePair("serviceMethodName", method));
        UrlEncodedFormEntity entity = new UrlEncodedFormEntity(params, "UTF-8");
        
        post.setEntity(entity);

        String result = "";
        
        HttpResponse resp = httpclient.execute(targetHost, post);
        resp.getEntity().writeTo(System.out);

        result =  resp.getEntity().getContent().toString();
        httpclient.getConnectionManager().shutdown();

        return result;

    }


    public static String serviceCall(List<NameValuePair> params) throws Exception {

     
        HttpHost targetHost = new HttpHost(LiferayHelper->host, LiferayHelper->port, "http");
        DefaultHttpClient httpclient = new DefaultHttpClient();
        httpclient.getCredentialsProvider().setCredentials(
                new AuthScope(targetHost.getHostName(), targetHost.getPort()),
                new UsernamePasswordCredentials(LiferayHelper->user,LiferayHelper->pass));

        HttpPost post = new HttpPost(LiferayHelper->endpoint);

        UrlEncodedFormEntity entity = new UrlEncodedFormEntity(params, "UTF-8");
        post.setEntity(entity);

        String result = "";
        HttpResponse resp = httpclient.execute(targetHost, post);




        result =  LiferayHelper.convertStreamToString(resp.getEntity().getContent());

        //resp.getEntity().writeTo(System.out);
        System.out.println(result);

        httpclient.getConnectionManager().shutdown();

        return result;

    }

    public static String search( String tags) throws Exception {

       HttpHost targetHost = new HttpHost(LiferayHelper->host, LiferayHelper->port, "http");
        List<NameValuePair> params = new ArrayList<NameValuePair>();
        params.add(new BasicNameValuePair("p_p_id",LiferayHelper->portletId));
        params.add(new BasicNameValuePair("p_p_lifecycle", "2"));
        params.add(new BasicNameValuePair("type", "json"));
        params.add(new BasicNameValuePair("tags",tags));
        String paramString = URLEncodedUtils.format(params, "utf-8");
        String final_url = targetHost.toURI()+"/api"+"?"+paramString;
        String result = HttpHelper.get(final_url);
        return result;

    }

    public static String get(String id) throws Exception {


        List<NameValuePair> params = new ArrayList<NameValuePair>();
        params.add(new BasicNameValuePair("serviceClassName", "com.liferay.portlet.journal.service.JournalArticleServiceUtil"));
        params.add(new BasicNameValuePair("serviceMethodName", "getArticle"));
        params.add(new BasicNameValuePair("serviceParameters", "[groupId,articleId]"));
        params.add(new BasicNameValuePair("groupId", LiferayHelper->scopeGroupId));
        params.add(new BasicNameValuePair("articleId", id));

        return LiferayHelper.serviceCall(params);


    }

}