se.chalmers.watchme.net.HttpRetriever.java Source code

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Here is the source code for se.chalmers.watchme.net.HttpRetriever.java

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/**
 *   HttpRetriever.java
 *
 *   Class responsible for sending simple GET HTTP request
 *   to a URL and return the result as a String.
 *
 *   @author Johan
 *   @copyright (c) 2012 Johan Brook, Robin Andersson, Lisa Stenberg, Mattias Henriksson
 *   @license MIT
 */

package se.chalmers.watchme.net;

import java.io.IOException;

import org.apache.http.HttpEntity;
import org.apache.http.HttpResponse;
import org.apache.http.HttpStatus;
import org.apache.http.client.methods.HttpGet;
import org.apache.http.impl.client.DefaultHttpClient;
import org.apache.http.util.EntityUtils;

import android.util.Log;

public class HttpRetriever {

    // Create a new HTTP client from the Apache library
    private DefaultHttpClient client = new DefaultHttpClient();

    /**
     * Send a GET request to a URL.
     * 
     * <p>
     * The <code>url</code> parameter must be well formatted, as no validations
     * are made in this method.
     * </p>
     * 
     * @param url
     *            The url
     * @return String with the response on success, otherwise null
     * @throws {@link IOException} if the HTTP connection failed
     * @throws NoEntityException
     *             if no HttpEntity was available in the response
     */
    public String get(String url) throws IOException, NoEntityException {

        HttpGet request = new HttpGet(url);

        HttpResponse res = this.client.execute(request);
        final int statusCode = res.getStatusLine().getStatusCode();

        Log.i("Custom", "Retrieving " + url + ", status: " + statusCode);

        // Return null if the status code isn't 200 OK
        if (statusCode != HttpStatus.SC_OK) {
            return null;
        }

        HttpEntity entity = res.getEntity();

        // Return a stringified version of the response
        if (entity != null) {
            return EntityUtils.toString(entity);
        } else {
            throw new NoEntityException("No entity from " + url);
        }
    }

}