edu.du.penrose.systems.util.HttpClientUtils.java Source code

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Here is the source code for edu.du.penrose.systems.util.HttpClientUtils.java

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/*
 * Copyright 2012 University of Denver
 * Author Chet Rebman
 * 
 * This file is part of FedoraApp.
 * 
 * FedoraApp is free software: you can redistribute it and/or modify
 * it under the terms of the GNU General Public License as published by
 * the Free Software Foundation, either version 3 of the License, or
 * (at your option) any later version.
 * 
 * FedoraApp is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU General Public License for more details.
 * 
 * You should have received a copy of the GNU General Public License
 * along with FedoraApp.  If not, see <http://www.gnu.org/licenses/>.
*/
package edu.du.penrose.systems.util;

import java.io.BufferedInputStream;
import java.io.File;
import java.io.FileOutputStream;
import java.io.InputStream;
import java.io.OutputStream;

import org.apache.commons.httpclient.HttpClient;
import org.apache.commons.httpclient.HttpMethod;
import org.apache.commons.httpclient.methods.GetMethod;

public class HttpClientUtils {

    /**
     * Appends response form URL to a StringBuffer
     * 
     * @param requestUrl
     * @param resultStringBuffer
     * @return int request status code OR -1 if an exception occurred
     */
    static public int getAsString(String requestUrl, StringBuffer resultStringBuffer) {
        HttpClient client = new HttpClient();

        //   client.getState().setCredentials(
        //         new AuthScope("localhost", 7080, null ),
        //         new UsernamePasswordCredentials("nation", "nationPW") 
        //     );
        //   client.getParams().setAuthenticationPreemptive(true);

        HttpMethod method = new GetMethod(requestUrl);

        // method.setDoAuthentication( true );   
        // client.getParams().setAuthenticationPreemptive(true);

        // Execute and print response
        try {
            client.executeMethod(method);
            InputStream is = method.getResponseBodyAsStream();
            BufferedInputStream bis = new BufferedInputStream(is);

            String datastr = null;
            byte[] bytes = new byte[8192]; // reading as chunk of 8192 bytes
            int count = bis.read(bytes);
            while (count != -1 && count <= 8192) {
                datastr = new String(bytes, 0, count);
                resultStringBuffer.append(datastr);
                count = bis.read(bytes);
            }
            bis.close();

        } catch (Exception e) {
            e.printStackTrace();
        } finally {
            method.releaseConnection();
        }

        return method.getStatusCode();
    }

    /**
     * Get file from URL, directories are created and files overwritten.
     * 
     * 
     * @deprecated use  org.apache.commons.io.FileUtils.copyURLToFile(URL, File)
     * @param requestUrl
     * @param outputPathAndFileName
     *
     * @return int request status code OR -1 if an exception occurred
     */
    static public int getToFile(String requestUrl, String outputPathAndFileName) {
        int resultStatus = -1;

        File outputFile = new File(outputPathAndFileName);
        String outputPath = outputFile.getAbsolutePath().replace(outputFile.getName(), "");
        File outputDir = new File(outputPath);
        if (!outputDir.exists()) {
            outputDir.mkdir();
        }

        HttpClient client = new HttpClient();

        //   client.getState().setCredentials(
        //         new AuthScope("localhost", 7080, null ),
        //         new UsernamePasswordCredentials("nation", "nationPW") 
        //     );
        //   client.getParams().setAuthenticationPreemptive(true);

        HttpMethod method = new GetMethod(requestUrl);

        //   method.setDoAuthentication( true );   
        //  client.getParams().setAuthenticationPreemptive(true);

        // Execute and print response
        try {

            OutputStream os = new FileOutputStream(outputFile);

            client.executeMethod(method);
            InputStream is = method.getResponseBodyAsStream();
            BufferedInputStream bis = new BufferedInputStream(is);

            byte[] bytes = new byte[8192]; // reading as chunk of 8192 bytes
            int count = bis.read(bytes);
            while (count != -1 && count <= 8192) {
                os.write(bytes, 0, count);
                count = bis.read(bytes);
            }
            bis.close();
            os.close();
            resultStatus = method.getStatusCode();

        } catch (Exception e) {
            e.printStackTrace();
        } finally {
            method.releaseConnection();
        }

        return resultStatus;
    }

    public boolean testHttpConnection() {
        boolean result = true;

        HttpClient httpclient = new HttpClient();
        GetMethod httpget = new GetMethod("https://www.verisign.com/");
        try {
            try {
                httpclient.executeMethod(httpget);
            } catch (Exception e) {
                result = false;
            }

            System.out.println(httpget.getStatusLine());

        } finally {
            httpget.releaseConnection();
        }

        if (httpget.getStatusCode() != 200) {
            result = false;
        }

        return result;
    }

} // HttpClientUtils