marcaurele commented on a change in pull request #2379: CLOUDSTACK-10146: Bypass Secondary Storage for KVM templates URL: https://github.com/apache/cloudstack/pull/2379#discussion_r159590751
########## File path: agent/src/com/cloud/agent/direct/download/HttpDirectTemplateDownloader.java ########## @@ -0,0 +1,158 @@ +// +// 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.agent.direct.download; + +import com.cloud.utils.exception.CloudRuntimeException; +import org.apache.commons.httpclient.Header; +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.log4j.Logger; + +import java.io.File; +import java.io.IOException; +import java.io.InputStream; +import java.io.RandomAccessFile; +import java.util.Map; + +public class HttpDirectTemplateDownloader extends DirectTemplateDownloaderImpl { + + private HttpClient client; + private static final MultiThreadedHttpConnectionManager s_httpClientManager = new MultiThreadedHttpConnectionManager(); + private static final int CHUNK_SIZE = 1024 * 1024; //1M + private final HttpMethodRetryHandler myretryhandler; + public static final Logger s_logger = Logger.getLogger(HttpDirectTemplateDownloader.class.getName()); + private GetMethod request; + private long remoteSize; + + public HttpDirectTemplateDownloader(String url, Long templateId, String destPoolPath, String checksum, Map<String, String> headers) { + super(url, destPoolPath, templateId, checksum); + client = new HttpClient(s_httpClientManager); + myretryhandler = createRetryTwiceHandler(); + request = createRequest(url, headers); + String downloadDir = getDirectDownloadTempPath(templateId); + createTemporaryDirectoryAndFile(downloadDir); + } + + private void createTemporaryDirectoryAndFile(String downloadDir) { + createFolder(getDestPoolPath() + File.separator + downloadDir); + File f = new File(getDestPoolPath() + File.separator + downloadDir + File.separator + getFileNameFromUrl()); + setDownloadedFilePath(f.getAbsolutePath()); + } + + private GetMethod createRequest(String downloadUrl, Map<String, String> headers) { + GetMethod request = new GetMethod(downloadUrl); + request.getParams().setParameter(HttpMethodParams.RETRY_HANDLER, myretryhandler); + request.setFollowRedirects(true); + for (String key : headers.keySet()) { + request.setRequestHeader(key, headers.get(key)); + } + return request; + } + + private long getRemoteSize(GetMethod request) { + Header contentLengthHeader = request.getResponseHeader("Content-Length"); + long reportedRemoteSize = 0; + if (contentLengthHeader == null) { + Header chunkedHeader = request.getResponseHeader("Transfer-Encoding"); + if (chunkedHeader == null || !"chunked".equalsIgnoreCase(chunkedHeader.getValue())) { + throw new CloudRuntimeException("Error template remote size"); + } + } else { + reportedRemoteSize = Long.parseLong(contentLengthHeader.getValue()); + } + return reportedRemoteSize; + } + + private 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; + } + }; + } + + @Override + public boolean downloadTemplate() { + InputStream in = null; + RandomAccessFile out = null; + try { + client.executeMethod(request); + remoteSize = getRemoteSize(request); Review comment: `remoteSize` is never read ---------------------------------------------------------------- This is an automated message from the Apache Git Service. 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