eu.liveandgov.ar.utilities.RestClient.java Source code

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Here is the source code for eu.liveandgov.ar.utilities.RestClient.java

Source

/*
 *  How to use me
 *  
 *  
     
 RestClient client = new RestClient(LOGIN_URL);
client.AddParam("accountType", "GOOGLE");
client.AddParam("source", "tboda-widgalytics-0.1");
client.AddParam("Email", _username);
client.AddParam("Passwd", _password);
client.AddParam("service", "analytics");
client.AddHeader("GData-Version", "2");
    
try {
client.Execute(RequestMethod.POST);
} catch (Exception e) {
e.printStackTrace();
}
    
String response = client.getResponse();
*/

package eu.liveandgov.ar.utilities;

import java.io.BufferedReader;
import java.io.IOException;
import java.io.InputStream;
import java.io.InputStreamReader;
import java.io.UnsupportedEncodingException;
import java.net.URLEncoder;
import java.util.ArrayList;

import org.apache.http.HttpEntity;
import org.apache.http.HttpResponse;
import org.apache.http.NameValuePair;
import org.apache.http.client.ClientProtocolException;
import org.apache.http.client.HttpClient;
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.methods.HttpUriRequest;
import org.apache.http.impl.client.DefaultHttpClient;
import org.apache.http.message.BasicNameValuePair;

import android.util.Log;

/**
 * Rest client to download information from php API.
 * 
 * @copyright   Copyright (C) 2012 - 2013 Information Technology Institute ITI-CERTH. All rights reserved.
 * @license     GNU Affero General Public License version 3 or later; see LICENSE.txt
 * @author      Dimitrios Ververidis for the Multimedia Group (http://mklab.iti.gr). 
 *
 */
public class RestClient {

    private ArrayList<NameValuePair> params;
    private ArrayList<NameValuePair> headers;

    //private File file;

    private String url;

    private int responseCode;
    private String message;
    private String response;

    public enum RequestMethod {
        GET, POST;
    }

    public String getResponse() {
        return response;
    }

    public String getErrorMessage() {
        return message;
    }

    public int getResponseCode() {
        return responseCode;
    }

    public RestClient(String url) //, File mfile
    {
        this.url = url;
        params = new ArrayList<NameValuePair>();
        headers = new ArrayList<NameValuePair>();
    }

    public void AddParam(String name, String value) {
        params.add(new BasicNameValuePair(name, value));
    }

    public void AddHeader(String name, String value) {
        headers.add(new BasicNameValuePair(name, value));
    }

    public String Execute(RequestMethod method, int soTime, int connTime) {
        switch (method) {
        case GET: {
            //add parameters
            String combinedParams = "";
            if (!params.isEmpty()) {
                combinedParams += "?";
                for (NameValuePair p : params) {
                    String paramString;
                    try {
                        paramString = p.getName() + "=" + URLEncoder.encode(p.getValue(), "UTF-8");

                        if (combinedParams.length() > 1)
                            combinedParams += "&" + paramString;
                        else
                            combinedParams += paramString;

                    } catch (UnsupportedEncodingException e) {
                        // TODO Auto-generated catch block
                        e.printStackTrace();
                    }

                }
            }

            HttpGet request = new HttpGet(url + combinedParams);

            //add headers
            for (NameValuePair h : headers) {
                request.addHeader(h.getName(), h.getValue());
                //Log.e("headers", h.getName());
            }

            // Log.e("REST", " " + url + " " + soTime + " " + connTime );

            executeRequest(request, url, soTime, connTime);
            break;
        }
        case POST: {
            HttpPost request = new HttpPost(url);

            //add headers
            for (NameValuePair h : headers) {
                request.addHeader(h.getName(), h.getValue());
            }

            if (!params.isEmpty()) {
                try {
                    request.setEntity(new UrlEncodedFormEntity(params, "UTF-8"));
                } catch (UnsupportedEncodingException e) {
                    // TODO Auto-generated catch block
                    e.printStackTrace();
                }
            }

            executeRequest(request, url, soTime, connTime);
            break;
        }
        }

        return response;
    }

    private void executeRequest(HttpUriRequest request, String url, int soTime, int connTime) {
        HttpClient client = new DefaultHttpClient();

        //----- Set timeout --------------
        //        HttpParams httpParameters = new BasicHttpParams();
        //        
        //        // Set the timeout in milliseconds until a connection is established.
        //        // The default value is zero, that means the timeout is not used. 
        //        int timeoutConnection = 1000;
        //        HttpConnectionParams.setConnectionTimeout(httpParameters, timeoutConnection);
        //        // Set the default socket timeout (SO_TIMEOUT) 
        //        // in milliseconds which is the timeout for waiting for data.
        //        int timeoutSocket = 1000;
        //        HttpConnectionParams.setSoTimeout(httpParameters, timeoutSocket);

        client.getParams().setParameter("http.socket.timeout", soTime);
        client.getParams().setParameter("http.connection.timeout", connTime);

        //----------------------------------
        HttpResponse httpResponse;

        try {
            httpResponse = client.execute(request);
            responseCode = httpResponse.getStatusLine().getStatusCode();
            message = httpResponse.getStatusLine().getReasonPhrase();

            HttpEntity entity = httpResponse.getEntity();

            if (entity != null) {

                InputStream instream = entity.getContent();
                response = convertStreamToString(instream);

                // Closing the input stream will trigger connection release
                instream.close();
            }

        } catch (ClientProtocolException e) {
            client.getConnectionManager().shutdown();
            e.printStackTrace();
        } catch (IOException e) {
            client.getConnectionManager().shutdown();
            e.printStackTrace();
        }
    }

    private static String convertStreamToString(InputStream is) {

        BufferedReader reader = null;
        try {
            reader = new BufferedReader(new InputStreamReader(is, "UTF-8"));
        } catch (UnsupportedEncodingException e1) {
            Log.e("RestClient", "Can not read from InputStream");
        }
        StringBuilder sb = new StringBuilder();

        char[] buf = new char[1];

        try {
            while (reader.read(buf) != -1)
                sb.append(buf);
        } catch (IOException e) {
            Log.e("RestClient", "IO Exception");
        } finally {
            try {
                is.close();
            } catch (IOException e) {
                Log.e("RestClient", "IO Exception B");
            }
        }
        return sb.toString();
    }
}