org.trpr.platform.batch.impl.job.ha.service.FileUpload.java Source code

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Here is the source code for org.trpr.platform.batch.impl.job.ha.service.FileUpload.java

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/*
 * Copyright 2012-2015, the original author or authors.
 *
 * 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 org.trpr.platform.batch.impl.job.ha.service;

import java.io.BufferedReader;
import java.io.InputStream;
import java.io.InputStreamReader;

import org.apache.http.HttpEntity;
import org.apache.http.HttpResponse;
import org.apache.http.client.HttpClient;
import org.apache.http.client.methods.HttpRequestBase;
import org.apache.http.impl.client.DefaultHttpClient;
import org.trpr.platform.core.impl.logging.LogFactory;
import org.trpr.platform.core.spi.logging.Logger;

/**
 * <code>FileUpload </code> is a class providing methods to easily upload files via HTTP POST
 * 
 * @author devashishshankar
 * @version 1.0, 31 Jan, 2013
 */
public class FileUpload {

    /** Logger instance for this class */
    private static final Logger LOGGER = LogFactory.getLogger(FileUpload.class);

    /**
     * A generic method to execute any type of Http Request and constructs a response object
     * @param requestBase the request that needs to be exeuted
     * @return server response as <code>String</code>
     */
    public static String executeRequest(HttpRequestBase requestBase) {
        //The string holding the server response
        String responseString = "";
        InputStream responseStream = null;
        HttpClient client = new DefaultHttpClient();
        try {
            HttpResponse response = client.execute(requestBase);
            if (response != null) {
                HttpEntity responseEntity = response.getEntity();
                if (responseEntity != null) {
                    responseStream = responseEntity.getContent();
                    if (responseStream != null) {
                        BufferedReader br = new BufferedReader(new InputStreamReader(responseStream));
                        String responseLine = br.readLine();
                        String tempResponseString = "";
                        while (responseLine != null) {
                            tempResponseString = tempResponseString + responseLine
                                    + System.getProperty("line.separator");
                            responseLine = br.readLine();
                        }
                        br.close();
                        if (tempResponseString.length() > 0) {
                            responseString = tempResponseString;
                        }
                    }
                }
            }
        } catch (Exception e) {
            LOGGER.error("Exception while uploading file to server", e);
        }
        client.getConnectionManager().shutdown();
        return responseString;
    }
}