com.wichita.edu.crawler.GerritHttpRequest.java Source code

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Here is the source code for com.wichita.edu.crawler.GerritHttpRequest.java

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/* 
 Copyright Motahareh Bahrami Zanjani <mxbahramizanjani@wichita.edu>
    
This program is free software; you can redistribute it and/or
modify it under the terms of the GNU Library General Public
License as published by the Free Software Foundation; either
version 2 of the License, or (at your option) any later version.
    
This program 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
Library General Public License for more details.
    
You should have received a copy of the GNU Library General Public
License along with this program; if not, write to the Free
Software Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301, USA.
    
Author: Sara Bahrami
  mxbahramizanjani@wichita.edu
*/

package com.wichita.edu.crawler;

import org.json.*;

import java.io.IOException;
import java.io.UnsupportedEncodingException;

import org.apache.http.HttpEntity;
import org.apache.http.HttpResponse;
import org.apache.http.client.ClientProtocolException;
import org.apache.http.client.methods.HttpGet;
import org.apache.http.client.HttpClient;
import org.apache.http.impl.client.HttpClientBuilder;
import org.apache.http.util.EntityUtils;

public class GerritHttpRequest {
    //MEMBER VARIABLES
    public JSONArray reviewDataArray = new JSONArray();
    public JSONObject reviewDataObject = new JSONObject();

    //CONSTRUCTORS
    public GerritHttpRequest(String url) throws JSONException

    {

        try {

            System.out.println(url);
            //sending an httprequest with GET method and get result by httpEntity
            HttpClient httpclient = HttpClientBuilder.create().build();
            HttpEntity httpEntity = null;
            HttpResponse httpResponse = null;
            HttpGet httpGet = new HttpGet(url);
            httpResponse = httpclient.execute(httpGet);
            httpEntity = httpResponse.getEntity();
            String response = EntityUtils.toString(httpEntity);
            System.out.println(response);
            //if response be empty the length of response is 8.
            if (response.length() > 8) {
                //JSON response has )]} extra characters which should be remove.
                response = response.replace(")]}'", "");

                //response from this url:"https://git.eclipse.org/r/changes/?q=mylyn&o=ALL_REVISIONS&o=ALL_FILES&o=MESSAGES";
                if (response.startsWith("\n[")) {
                    //declare JSONArray from response 
                    reviewDataArray = new JSONArray(response);
                    if (reviewDataArray.length() > 1) {
                        //declare JSONObject from reviewDataArray
                        reviewDataObject = reviewDataArray.getJSONObject(1);
                    } else {
                        //declare JSONObject from reviewDataArray
                        reviewDataObject = reviewDataArray.getJSONObject(0);
                    }

                }
                //response from this url:""https://git.eclipse.org/r/changes/"+entry.getKey()+"/revisions/"+value+"/comments"
                else if (response.startsWith("\n{")) {
                    reviewDataObject = new JSONObject(response);
                    // System.out.println(response.toString());
                }

            }

        }

        catch (UnsupportedEncodingException e) {
            e.printStackTrace();
        } catch (ClientProtocolException e) {
            e.printStackTrace();
        } catch (IOException e) {
            e.printStackTrace();
        }

    }

    //GET Method
    public JSONObject getjson() {
        return reviewDataObject;
    }
}