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Diffstat (limited to 'netx/net/sourceforge/jnlp/cache/ResourceUrlCreator.java')
| -rw-r--r-- | netx/net/sourceforge/jnlp/cache/ResourceUrlCreator.java | 163 |
1 files changed, 163 insertions, 0 deletions
diff --git a/netx/net/sourceforge/jnlp/cache/ResourceUrlCreator.java b/netx/net/sourceforge/jnlp/cache/ResourceUrlCreator.java new file mode 100644 index 0000000..be9844a --- /dev/null +++ b/netx/net/sourceforge/jnlp/cache/ResourceUrlCreator.java @@ -0,0 +1,163 @@ +/* ResourceUrlCreator.java + Copyright (C) 2011 Red Hat, Inc + +This file is part of IcedTea. + +IcedTea is free software; you can redistribute it and/or modify +it under the terms of the GNU General Public License as published by +the Free Software Foundation; either version 2, or (at your option) +any later version. + +IcedTea is distributed in the hope that it will be useful, but +WITHOUT ANY WARRANTY; without even the implied warranty of +MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU +General Public License for more details. + +You should have received a copy of the GNU General Public License +along with IcedTea; see the file COPYING. If not, write to the +Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA +02110-1301 USA. + +Linking this library statically or dynamically with other modules is +making a combined work based on this library. Thus, the terms and +conditions of the GNU General Public License cover the whole +combination. + +As a special exception, the copyright holders of this library give you +permission to link this library with independent modules to produce an +executable, regardless of the license terms of these independent +modules, and to copy and distribute the resulting executable under +terms of your choice, provided that you also meet, for each linked +independent module, the terms and conditions of the license of that +module. An independent module is a module which is not derived from +or based on this library. If you modify this library, you may extend +this exception to your version of the library, but you are not +obligated to do so. If you do not wish to do so, delete this +exception statement from your version. */ + +package net.sourceforge.jnlp.cache; + +import java.net.MalformedURLException; +import java.net.URL; +import java.util.LinkedList; +import java.util.List; + +import net.sourceforge.jnlp.DownloadOptions; + +public class ResourceUrlCreator { + + protected final Resource resource; + protected final DownloadOptions downloadOptions; + + public ResourceUrlCreator(Resource resource, DownloadOptions downloadOptions) { + this.resource = resource; + this.downloadOptions = downloadOptions; + } + + /** + * Returns a list of URLs that the resources might be downloadable from. + * The Resources may not be downloadable from any of them. The returned order is the order + * the urls should be attempted in. + * @return + */ + public List<URL> getUrls() { + List<URL> urls = new LinkedList<URL>(); + URL url = null; + + if (downloadOptions.useExplicitPack() && downloadOptions.useExplicitVersion()) { + url = getUrl(resource, true, true); + if (url != null) { + urls.add(url); + } + url = getUrl(resource, false, true); + if (url != null) { + urls.add(url); + } + url = getUrl(resource, true, false); + if (url != null) { + urls.add(url); + } + } else if (downloadOptions.useExplicitPack()) { + url = getUrl(resource, true, false); + if (url != null) { + urls.add(url); + } + } else if (downloadOptions.useExplicitVersion()) { + url = getUrl(resource, false, true); + if (url != null) { + urls.add(url); + } + } + + url = getVersionedUrlUsingQuery(resource); + urls.add(url); + + urls.add(resource.getLocation()); + + return urls; + } + + /** + * Returns a url for the resource. + * @param resource the resource + * @param usePack whether the URL should point to the pack200 file + * @param useVersion whether the URL should be modified to include the version + * @return a URL for the resource or null if an appropraite URL can not be found + */ + protected URL getUrl(Resource resource, boolean usePack, boolean useVersion) { + if (!(usePack || useVersion)) { + throw new IllegalArgumentException("either pack200 or version required"); + } + + String location = resource.getLocation().toString(); + int lastSlash = resource.getLocation().toString().lastIndexOf('/'); + if (lastSlash == -1) { + return resource.getLocation(); + } + String filename = location.substring(lastSlash + 1); + if (useVersion && resource.requestVersion != null) { + String parts[] = filename.split("\\.", 2); + String name = parts[0]; + String extension = parts[1]; + filename = name + "__V" + resource.requestVersion + "." + extension; + } + if (usePack) { + filename = filename.replace(".jar", ".pack.gz"); + } + + location = location.substring(0, lastSlash + 1) + filename; + try { + URL newUrl = new URL(location); + return newUrl; + } catch (MalformedURLException e) { + return null; + } + } + + /** + * Returns the URL for a resource, relying on HTTP query for getting the + * right version + * + * @param resource the resource to get the url for + */ + protected URL getVersionedUrlUsingQuery(Resource resource) { + String actualLocation = resource.getLocation().getProtocol() + "://" + + resource.getLocation().getHost(); + if (resource.getLocation().getPort() != -1) { + actualLocation += ":" + resource.getLocation().getPort(); + } + actualLocation += resource.getLocation().getPath(); + if (resource.requestVersion != null + && resource.requestVersion.isVersionId()) { + actualLocation += "?version-id=" + resource.requestVersion; + } + URL versionedURL; + try { + versionedURL = new URL(actualLocation); + } catch (MalformedURLException e) { + return resource.getLocation(); + } + return versionedURL; + } + +}
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