| /******************************************************************************* |
| * Copyright (c) 2009, 2010 Tasktop Technologies and others. |
| * |
| * This program and the accompanying materials are made available under the |
| * terms of the Eclipse Public License v. 2.0 which is available at |
| * https://www.eclipse.org/legal/epl-2.0 |
| * |
| * SPDX-License-Identifier: EPL-2.0 |
| * |
| * Tasktop Technologies - initial API and implementation |
| *******************************************************************************/ |
| package org.eclipse.mylyn.internal.discovery.core.util; |
| |
| import java.io.BufferedInputStream; |
| import java.io.FileNotFoundException; |
| import java.io.IOException; |
| import java.io.InputStream; |
| import java.io.OutputStream; |
| |
| import org.apache.commons.httpclient.Header; |
| import org.apache.commons.httpclient.HostConfiguration; |
| import org.apache.commons.httpclient.HttpClient; |
| import org.apache.commons.httpclient.HttpStatus; |
| import org.apache.commons.httpclient.methods.GetMethod; |
| import org.apache.commons.httpclient.methods.HeadMethod; |
| import org.apache.commons.httpclient.util.DateParseException; |
| import org.apache.commons.httpclient.util.DateUtil; |
| import org.eclipse.core.runtime.CoreException; |
| import org.eclipse.core.runtime.IProgressMonitor; |
| import org.eclipse.core.runtime.IStatus; |
| import org.eclipse.core.runtime.Status; |
| import org.eclipse.mylyn.commons.net.Policy; |
| import org.eclipse.mylyn.commons.net.WebLocation; |
| import org.eclipse.mylyn.internal.discovery.core.DiscoveryCore; |
| import org.eclipse.osgi.util.NLS; |
| |
| /** |
| * A utility for accessing web resources. |
| * |
| * @author David Green |
| * @author Steffen Pingel |
| */ |
| public class HttpClientTransportService implements ITransportService { |
| |
| public HttpClientTransportService() { |
| } |
| |
| /** |
| * Download an HTTP-based resource |
| * |
| * @param target |
| * the target file to which the content is saved |
| * @param location |
| * the web location of the content |
| * @param monitor |
| * the monitor |
| * @throws IOException |
| * if a network or IO problem occurs |
| */ |
| public IStatus download(java.net.URI uri, OutputStream out, IProgressMonitor monitor) { |
| WebLocation location = new WebLocation(uri.toString()); |
| monitor = Policy.monitorFor(monitor); |
| monitor.beginTask(NLS.bind(Messages.WebUtil_task_retrievingUrl, location.getUrl()), IProgressMonitor.UNKNOWN); |
| try { |
| HttpClient client = new HttpClient(); |
| org.eclipse.mylyn.commons.net.WebUtil.configureHttpClient(client, ""); //$NON-NLS-1$ |
| |
| GetMethod method = new GetMethod(location.getUrl()); |
| try { |
| HostConfiguration hostConfiguration = org.eclipse.mylyn.commons.net.WebUtil.createHostConfiguration( |
| client, location, monitor); |
| int result = org.eclipse.mylyn.commons.net.WebUtil.execute(client, hostConfiguration, method, monitor); |
| if (result == HttpStatus.SC_OK) { |
| InputStream in = org.eclipse.mylyn.commons.net.WebUtil.getResponseBodyAsStream(method, monitor); |
| try { |
| in = new BufferedInputStream(in); |
| try { |
| int i; |
| while ((i = in.read()) != -1) { |
| out.write(i); |
| } |
| return Status.OK_STATUS; |
| } finally { |
| out.close(); |
| } |
| } finally { |
| in.close(); |
| } |
| } else { |
| throw new IOException(NLS.bind(Messages.WebUtil_cannotDownload, location.getUrl(), result)); |
| } |
| } finally { |
| method.releaseConnection(); |
| } |
| } catch (IOException e) { |
| return new Status(IStatus.ERROR, DiscoveryCore.ID_PLUGIN, |
| NLS.bind("Download of {0} failed", uri.toString())); //$NON-NLS-1$ |
| } finally { |
| monitor.done(); |
| } |
| } |
| |
| /** |
| * Read a web-based resource at the specified location using the given processor. |
| * |
| * @param location |
| * the web location of the content |
| * @param processor |
| * the processor that will handle content |
| * @param monitor |
| * the monitor |
| * @throws IOException |
| * if a network or IO problem occurs |
| */ |
| public InputStream stream(java.net.URI uri, IProgressMonitor monitor) throws IOException, CoreException { |
| WebLocation location = new WebLocation(uri.toString()); |
| monitor = Policy.monitorFor(monitor); |
| monitor.beginTask(NLS.bind(Messages.WebUtil_task_retrievingUrl, location.getUrl()), IProgressMonitor.UNKNOWN); |
| try { |
| HttpClient client = new HttpClient(); |
| org.eclipse.mylyn.commons.net.WebUtil.configureHttpClient(client, ""); //$NON-NLS-1$ |
| |
| boolean success = false; |
| GetMethod method = new GetMethod(location.getUrl()); |
| try { |
| HostConfiguration hostConfiguration = org.eclipse.mylyn.commons.net.WebUtil.createHostConfiguration( |
| client, location, monitor); |
| int result = org.eclipse.mylyn.commons.net.WebUtil.execute(client, hostConfiguration, method, monitor); |
| if (result == HttpStatus.SC_OK) { |
| InputStream in = org.eclipse.mylyn.commons.net.WebUtil.getResponseBodyAsStream(method, monitor); |
| success = true; |
| return in; |
| } else { |
| throw new IOException(NLS.bind(Messages.WebUtil_cannotDownload, location.getUrl(), result)); |
| } |
| } finally { |
| if (!success) { |
| method.releaseConnection(); |
| } |
| } |
| } finally { |
| monitor.done(); |
| } |
| } |
| |
| /** |
| * Verify availability of resources at the given web locations. Normally this would be done using an HTTP HEAD. |
| * |
| * @param locations |
| * the locations of the resource to verify |
| * @param one |
| * indicate if only one of the resources must exist |
| * @param monitor |
| * the monitor |
| * @return true if the resource exists |
| */ |
| public long getLastModified(java.net.URI uri, IProgressMonitor monitor) throws CoreException, IOException { |
| WebLocation location = new WebLocation(uri.toString()); |
| monitor = Policy.monitorFor(monitor); |
| monitor.beginTask(NLS.bind(Messages.WebUtil_task_retrievingUrl, location.getUrl()), IProgressMonitor.UNKNOWN); |
| try { |
| HttpClient client = new HttpClient(); |
| org.eclipse.mylyn.commons.net.WebUtil.configureHttpClient(client, ""); //$NON-NLS-1$ |
| |
| HeadMethod method = new HeadMethod(location.getUrl()); |
| try { |
| HostConfiguration hostConfiguration = org.eclipse.mylyn.commons.net.WebUtil.createHostConfiguration( |
| client, location, monitor); |
| int result = org.eclipse.mylyn.commons.net.WebUtil.execute(client, hostConfiguration, method, monitor); |
| if (result == HttpStatus.SC_OK) { |
| Header lastModified = method.getResponseHeader("Last-Modified"); //$NON-NLS-1$ |
| if (lastModified != null) { |
| try { |
| return DateUtil.parseDate(lastModified.getValue()).getTime(); |
| } catch (DateParseException e) { |
| // fall through |
| } |
| } |
| return 0; |
| } else if (result == HttpStatus.SC_NOT_FOUND) { |
| throw new FileNotFoundException( |
| NLS.bind(Messages.WebUtil_cannotDownload, location.getUrl(), result)); |
| } else { |
| throw new IOException(NLS.bind(Messages.WebUtil_cannotDownload, location.getUrl(), result)); |
| } |
| } finally { |
| method.releaseConnection(); |
| } |
| } finally { |
| monitor.done(); |
| } |
| } |
| |
| } |