org.eclipse.json.http.HttpHelper.java Source code

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Here is the source code for org.eclipse.json.http.HttpHelper.java

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/**
 *  Copyright (c) 2013-2014 Angelo ZERR.
 *  All rights reserved. This program and the accompanying materials
 *  are made available under the terms of the Eclipse Public License v1.0
 *  which accompanies this distribution, and is available at
 *  http://www.eclipse.org/legal/epl-v10.html
 *
 *  Contributors:
 *  Angelo Zerr <angelo.zerr@gmail.com> - initial API and implementation
 */
package org.eclipse.json.http;

import java.io.IOException;
import java.io.InputStream;
import java.io.InputStreamReader;

import org.apache.http.HttpEntity;
import org.apache.http.HttpResponse;
import org.apache.http.HttpStatus;
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.eclipse.json.provisonnal.com.eclipsesource.json.JsonObject;
import org.eclipse.json.provisonnal.com.eclipsesource.json.JsonValue;
import org.eclipse.json.provisonnal.com.eclipsesource.json.ParseException;

/**
 * Nodejs Tern helper.
 * 
 */
public class HttpHelper {

    // properties for remote access
    public static final boolean DEFAULT_REMOTE_ACCESS = false;
    public static final int DEFAULT_REMOTE_PORT = 1234;

    // properties for direct access
    public static final long DEFAULT_TIMEOUT = 200L; // 200ms
    public static final int DEFAULT_TEST_NUMBER = 50; // try to retrieve the
    // node.js port 50
    // each time on timeout
    // (max=50*200ms=10000ms).

    public static final boolean DEFAULT_PERSISTENT = false;

    public static JsonValue makeRequest(String url) throws IOException {
        long startTime = 0;
        HttpClient httpClient = new DefaultHttpClient();
        try {
            // Post JSON Tern doc
            HttpGet httpGet = new HttpGet(url);
            HttpResponse httpResponse = httpClient.execute(httpGet);
            HttpEntity entity = httpResponse.getEntity();
            InputStream in = entity.getContent();
            // Check the status
            StatusLine statusLine = httpResponse.getStatusLine();
            int statusCode = statusLine.getStatusCode();
            if (statusCode != HttpStatus.SC_OK) {
                // node.js server throws error
                /*
                 * String message = IOUtils.toString(in); if
                 * (StringUtils.isEmpty(message)) { throw new
                 * TernException(statusLine.toString()); } throw new
                 * TernException(message);
                 */
            }

            try {
                JsonValue response = JsonValue.readFrom(new InputStreamReader(in));
                return response;
            } catch (ParseException e) {
                throw new IOException(e);
            }
        } catch (Exception e) {
            if (e instanceof IOException) {
                throw (IOException) e;
            }
            throw new IOException(e);
        } finally {
            httpClient.getConnectionManager().shutdown();
        }
    }

    public static long getElapsedTimeInMs(long startTime) {
        return ((System.nanoTime() - startTime) / 1000000L);
    }

}