io.nirvagi.utils.node.helper.HttpGetHelper.java Source code

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Here is the source code for io.nirvagi.utils.node.helper.HttpGetHelper.java

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/*---------------------------------------------------------------------------------------------------------
* Copyright 2016 Nirvagi project
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
*     http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
* \*-------------------------------------------------------------------------------------------------------------------*/

package io.nirvagi.utils.node.helper;

import java.io.IOException;
import java.net.MalformedURLException;
import java.net.URL;

import org.apache.http.HttpResponse;
import org.apache.http.client.ClientProtocolException;
import org.apache.http.client.ResponseHandler;
import org.apache.http.client.methods.HttpGet;
import org.apache.http.impl.client.CloseableHttpClient;
import org.apache.http.impl.client.HttpClients;

public class HttpGetHelper {
    private static final String ERR_MESSAGE = "The url %s passed is malformed";
    private static final String HTTP_GET_FAILED_MESSAGE = "The http get for the url %s failed, The client returned the code of %s with message %s";

    private final CloseableHttpClient client;
    private final HttpGet httpGet;

    private ResponseHandler<String> createHttpResponseHandler() {
        return new ResponseHandler<String>() {

            public String handleResponse(HttpResponse response) throws ClientProtocolException, IOException {
                int statusCode = response.getStatusLine().getStatusCode();
                if (statusCode != 200) {
                    throw new ClientProtocolException(String.format(HTTP_GET_FAILED_MESSAGE,
                            httpGet.getURI().toString(), statusCode, response.getStatusLine().getReasonPhrase()));
                }
                return "SUCCESS";
            }
        };

    }

    public HttpGetHelper(final String url) {
        try {
            new URL(url);
        } catch (MalformedURLException e) {
            throw new RuntimeException(String.format(ERR_MESSAGE, url));
        }
        client = HttpClients.createDefault();
        httpGet = new HttpGet(url);
    }

    public void execute() {
        try {
            client.execute(httpGet, createHttpResponseHandler());
        } catch (Exception e) {
            throw new RuntimeException(e.getMessage());
        } finally {
            try {
                this.client.close();
            } catch (IOException e) {
            }
        }
    }

}