com.digipom.manteresting.android.service.cache.ImageDownloader.java Source code

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Here is the source code for com.digipom.manteresting.android.service.cache.ImageDownloader.java

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/*
 * Copyright (C) 2013 Digipom Inc.
 *
 * 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.digipom.manteresting.android.service.cache;

import java.io.ByteArrayOutputStream;
import java.io.InputStream;

import org.apache.http.HttpEntity;
import org.apache.http.HttpResponse;
import org.apache.http.HttpStatus;
import org.apache.http.client.HttpClient;
import org.apache.http.client.methods.HttpGet;
import org.apache.http.impl.client.DefaultHttpClient;

import android.util.Log;

import com.digipom.manteresting.android.config.LoggerConfig;
import com.digipom.manteresting.android.util.FileUtils;

class ImageDownloader {
    private static final String TAG = "ImageDownloader";

    private static final String[] otherExtensionsToTry = { "jpg", "jpe", "jpeg" };

    byte[] download(String uri) {
        final HttpClient httpClient = new DefaultHttpClient();

        HttpGet httpGet = new HttpGet(uri);
        byte[] data = null;

        try {
            HttpResponse response = httpClient.execute(httpGet);

            if (response.getStatusLine().getStatusCode() == HttpStatus.SC_NOT_FOUND) {
                for (String extension : otherExtensionsToTry) {
                    final String rewrittenUri = FileUtils.getFileNameWithoutExtension(uri) + '.' + extension;

                    if (LoggerConfig.canLog(Log.VERBOSE)) {
                        Log.v(TAG, "Original URI " + uri + " not found. Trying with another extension: "
                                + rewrittenUri);
                    }

                    // Consume the content so the connection can be re-used.
                    response.getEntity().consumeContent();

                    httpGet = new HttpGet(rewrittenUri);
                    response = httpClient.execute(httpGet);

                    if (response.getStatusLine().getStatusCode() == HttpStatus.SC_OK) {
                        break;
                    }
                }
            }

            InputStream is = null;

            try {
                final HttpEntity responseEntity = response.getEntity();
                is = responseEntity.getContent();
                final ByteArrayOutputStream baos = new ByteArrayOutputStream();
                final byte[] buffer = new byte[4096];

                int read;
                while ((read = is.read(buffer)) > 0) {
                    baos.write(buffer, 0, read);
                }

                data = baos.toByteArray();
            } finally {
                if (is != null) {
                    is.close();
                    is = null;
                }
            }
        } catch (Throwable t) {
            if (LoggerConfig.canLog(Log.DEBUG)) {
                Log.d(TAG, "Download failed: " + uri, t);
            }
        }

        return data;
    }
}