it.polimi.brusamentoceruti.moviebookrest.boundary.JsonRequest.java Source code

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Here is the source code for it.polimi.brusamentoceruti.moviebookrest.boundary.JsonRequest.java

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package it.polimi.brusamentoceruti.moviebookrest.boundary;

import java.io.IOException;
import java.io.InputStream;
import java.io.InputStreamReader;
import java.io.Reader;
import java.io.StringWriter;
import org.apache.http.HttpEntity;
import org.apache.http.HttpResponse;
import org.apache.http.StatusLine;
import org.apache.http.client.HttpClient;
import org.apache.http.client.methods.HttpGet;
import org.apache.http.impl.client.DefaultHttpClient;
import org.json.JSONException;
import org.json.JSONObject;

/**
 *
 * @author federico
 */
public class JsonRequest {

    public static JSONObject doQuery(String Url) throws JSONException, IOException {
        String responseBody = null;
        HttpGet httpget;
        HttpClient httpClient = new DefaultHttpClient();
        try {
            httpget = new HttpGet(Url);
        } catch (IllegalArgumentException iae) {
            return null;
        }

        HttpResponse response = httpClient.execute(httpget);
        InputStream contentStream = null;
        try {
            StatusLine statusLine = response.getStatusLine();
            if (statusLine == null) {
                throw new IOException(String.format("Unable to get a response from server"));
            }
            int statusCode = statusLine.getStatusCode();
            if (statusCode < 200 && statusCode >= 300) {
                throw new IOException(
                        String.format("OWM server responded with status code %d: %s", statusCode, statusLine));
            }
            /* Read the response content */
            HttpEntity responseEntity = response.getEntity();
            contentStream = responseEntity.getContent();
            Reader isReader = new InputStreamReader(contentStream);
            int contentSize = (int) responseEntity.getContentLength();
            if (contentSize < 0)
                contentSize = 8 * 1024;
            StringWriter strWriter = new StringWriter(contentSize);
            char[] buffer = new char[8 * 1024];
            int n = 0;
            while ((n = isReader.read(buffer)) != -1) {
                strWriter.write(buffer, 0, n);
            }
            responseBody = strWriter.toString();
            contentStream.close();
        } catch (IOException e) {
            throw e;
        } catch (RuntimeException re) {
            httpget.abort();
            throw re;
        } finally {
            if (contentStream != null)
                contentStream.close();
        }
        return new JSONObject(responseBody);
    }

}