Android Open Source - khandroid File Downloader

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License

The source code is released under:

Apache License

Java Source Code

/*
 * Copyright (C) 2012-2014 Ognyan Bankov
 *// w w  w . jav  a2s.c om
 * 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 com.github.khandroid.http.misc;

import java.io.BufferedOutputStream;
import java.io.ByteArrayInputStream;
import java.io.ByteArrayOutputStream;
import java.io.File;
import java.io.FileOutputStream;
import java.io.IOException;
import java.io.InputStream;
import java.io.OutputStream;
import java.net.URI;

import org.slf4j.LoggerFactory;

import khandroid.ext.apache.http.HttpEntity;
import khandroid.ext.apache.http.HttpResponse;
import khandroid.ext.apache.http.StatusLine;
import khandroid.ext.apache.http.client.ClientProtocolException;
import khandroid.ext.apache.http.client.HttpClient;
import khandroid.ext.apache.http.client.methods.HttpGet;


public class FileDownloader {
    private static final org.slf4j.Logger logger = LoggerFactory
            .getLogger(FileDownloader.class.getSimpleName());


    public static byte[] download(HttpClient httpClient, URI source) throws ClientProtocolException,
                                                                    IOException {
        byte[] ret;

        logger.trace("Downloading " + source.toString());
        HttpGet req = new HttpGet(source);
        HttpResponse response = httpClient.execute(req);
        StatusLine statusLine = response.getStatusLine();
        int statusCode = statusLine.getStatusCode();
        logger.trace("Status code:" + statusCode);
        if (statusCode == 200) {
            HttpEntity entity = response.getEntity();

            ByteArrayOutputStream output = new ByteArrayOutputStream();

            entity.writeTo(output);
            output.close();

            ret = output.toByteArray();
        } else {
            throw new IOException("Download failed, HTTP response code " + statusCode + " - "
                    + statusLine.getReasonPhrase());
        }
        req.releaseConnection();

        return ret;
    }


    public static void download(HttpClient httpClient, URI source, File destination) throws ClientProtocolException,
                                                                                    IOException {
        byte[] content = download(httpClient, source);
        ByteArrayInputStream input = new ByteArrayInputStream(content);
        BufferedOutputStream output = new BufferedOutputStream(new FileOutputStream(destination));

        copy(input, output);
        input.close();
        output.close();
    }


    public static long copy(InputStream from, OutputStream to) throws IOException {
        byte[] buf = new byte[0x1000];
        long total = 0;
        while (true) {
            int r = from.read(buf);
            if (r == -1) {
                break;
            }
            to.write(buf, 0, r);
            total += r;
        }
        return total;
    }
}

Java Source Code List

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