| // |
| // Licensed to the Apache Software Foundation (ASF) under one |
| // or more contributor license agreements. See the NOTICE file |
| // distributed with this work for additional information |
| // regarding copyright ownership. The ASF licenses this file |
| // to you 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.cloud.storage.template; |
| |
| import com.cloud.storage.StorageLayer; |
| import com.cloud.utils.UriUtils; |
| import org.apache.commons.httpclient.HttpClient; |
| import org.apache.commons.httpclient.HttpMethod; |
| import org.apache.commons.httpclient.HttpMethodRetryHandler; |
| import org.apache.commons.httpclient.MultiThreadedHttpConnectionManager; |
| import org.apache.commons.httpclient.NoHttpResponseException; |
| import org.apache.commons.httpclient.methods.GetMethod; |
| import org.apache.commons.httpclient.params.HttpMethodParams; |
| import org.apache.commons.io.IOUtils; |
| import org.apache.log4j.Logger; |
| import org.springframework.util.CollectionUtils; |
| |
| import java.io.File; |
| import java.io.FileOutputStream; |
| import java.io.IOException; |
| import java.io.InputStream; |
| import java.io.OutputStream; |
| import java.util.List; |
| |
| public class MetalinkTemplateDownloader extends TemplateDownloaderBase implements TemplateDownloader { |
| |
| private TemplateDownloader.Status status = TemplateDownloader.Status.NOT_STARTED; |
| protected HttpClient client; |
| private static final MultiThreadedHttpConnectionManager s_httpClientManager = new MultiThreadedHttpConnectionManager(); |
| protected HttpMethodRetryHandler myretryhandler; |
| protected GetMethod request; |
| private boolean toFileSet = false; |
| |
| private static final Logger LOGGER = Logger.getLogger(MetalinkTemplateDownloader.class.getName()); |
| |
| public MetalinkTemplateDownloader(StorageLayer storageLayer, String downloadUrl, String toDir, DownloadCompleteCallback callback, long maxTemplateSize) { |
| super(storageLayer, downloadUrl, toDir, maxTemplateSize, callback); |
| s_httpClientManager.getParams().setConnectionTimeout(5000); |
| client = new HttpClient(s_httpClientManager); |
| myretryhandler = createRetryTwiceHandler(); |
| request = createRequest(downloadUrl); |
| } |
| |
| protected GetMethod createRequest(String downloadUrl) { |
| GetMethod request = new GetMethod(downloadUrl); |
| request.getParams().setParameter(HttpMethodParams.RETRY_HANDLER, myretryhandler); |
| request.setFollowRedirects(true); |
| if (!toFileSet) { |
| String[] parts = downloadUrl.split("/"); |
| String filename = parts[parts.length - 1]; |
| _toFile = _toDir + File.separator + filename; |
| toFileSet = true; |
| } |
| return request; |
| } |
| |
| protected HttpMethodRetryHandler createRetryTwiceHandler() { |
| return new HttpMethodRetryHandler() { |
| @Override |
| public boolean retryMethod(final HttpMethod method, final IOException exception, int executionCount) { |
| if (executionCount >= 2) { |
| // Do not retry if over max retry count |
| return false; |
| } |
| if (exception instanceof NoHttpResponseException) { |
| // Retry if the server dropped connection on us |
| return true; |
| } |
| if (!method.isRequestSent()) { |
| // Retry if the request has not been sent fully or |
| // if it's OK to retry methods that have been sent |
| return true; |
| } |
| // otherwise do not retry |
| return false; |
| } |
| }; |
| } |
| |
| private boolean downloadTemplate() { |
| try { |
| client.executeMethod(request); |
| } catch (IOException e) { |
| LOGGER.error("Error on HTTP request: " + e.getMessage()); |
| return false; |
| } |
| return performDownload(); |
| } |
| |
| private boolean performDownload() { |
| try ( |
| InputStream in = request.getResponseBodyAsStream(); |
| OutputStream out = new FileOutputStream(_toFile); |
| ) { |
| IOUtils.copy(in, out); |
| } catch (IOException e) { |
| LOGGER.error("Error downloading template from: " + _downloadUrl + " due to: " + e.getMessage()); |
| return false; |
| } |
| return true; |
| } |
| @Override |
| public long download(boolean resume, DownloadCompleteCallback callback) { |
| if (_status == Status.ABORTED || _status == Status.UNRECOVERABLE_ERROR || _status == Status.DOWNLOAD_FINISHED) { |
| return 0; |
| } |
| |
| LOGGER.info("Starting metalink download from: " + _downloadUrl); |
| _start = System.currentTimeMillis(); |
| |
| status = Status.IN_PROGRESS; |
| List<String> metalinkUrls = UriUtils.getMetalinkUrls(_downloadUrl); |
| if (CollectionUtils.isEmpty(metalinkUrls)) { |
| LOGGER.error("No URLs found for metalink: " + _downloadUrl); |
| status = Status.UNRECOVERABLE_ERROR; |
| return 0; |
| } |
| boolean downloaded = false; |
| int i = 0; |
| while (!downloaded && i < metalinkUrls.size()) { |
| String url = metalinkUrls.get(i); |
| request = createRequest(url); |
| downloaded = downloadTemplate(); |
| i++; |
| } |
| if (!downloaded) { |
| LOGGER.error("Template couldnt be downloaded"); |
| status = Status.UNRECOVERABLE_ERROR; |
| return 0; |
| } |
| LOGGER.info("Template downloaded successfully on: " + _toFile); |
| status = Status.DOWNLOAD_FINISHED; |
| _downloadTime = System.currentTimeMillis() - _start; |
| if (_callback != null) { |
| _callback.downloadComplete(status); |
| } |
| return _totalBytes; |
| } |
| |
| @Override |
| public int getDownloadPercent() { |
| if (status == Status.DOWNLOAD_FINISHED) { |
| return 100; |
| } else if (status == Status.IN_PROGRESS) { |
| return 50; |
| } else { |
| return 0; |
| } |
| } |
| |
| @Override |
| public Status getStatus() { |
| return status; |
| } |
| |
| @Override |
| public void setStatus(Status status) { |
| this.status = status; |
| } |
| } |