/**
* The contents of this file are subject to the license and copyright
* detailed in the LICENSE and NOTICE files at the root of the source
* tree and available online at
*
* http://www.dspace.org/license/
*/
package org.dspace.sword2;
import org.apache.abdera.i18n.iri.IRI;
import org.dspace.content.Bitstream;
import org.dspace.content.Bundle;
import org.dspace.content.Collection;
import org.dspace.content.Community;
import org.dspace.content.DSpaceObject;
import org.dspace.content.Item;
import org.dspace.handle.HandleManager;
import org.dspace.core.ConfigurationManager;
import org.dspace.core.Context;
import org.swordapp.server.SwordError;
import java.sql.SQLException;
import java.net.URL;
import java.net.MalformedURLException;
/**
* @author Richard Jones
*
* Class responsible for constructing and de-constructing sword url space
* urls
*/
public class SwordUrlManager
{
/** the sword configuration */
private SwordConfigurationDSpace config;
/** the active dspace context */
private Context context;
public SwordUrlManager(SwordConfigurationDSpace config, Context context)
{
this.config = config;
this.context = context;
}
/**
* Obtain the deposit URL for the given collection. These URLs
* should not be considered persistent, but will remain consistent
* unless configuration changes are made to DSpace
*
* @param collection
* @return The Deposit URL
* @throws DSpaceSwordException
*/
public String getDepositLocation(Collection collection)
throws DSpaceSwordException
{
return this.getBaseCollectionUrl() + "/" + collection.getHandle();
}
/**
* Obtain the deposit URL for the given community. These URLs
* should not be considered persistent, but will remain consistent
* unless configuration changes are made to DSpace
*
* @param community
* @return The Deposit URL
* @throws DSpaceSwordException
*/
public String getDepositLocation(Community community)
throws DSpaceSwordException
{
if (this.config.allowCommunityDeposit())
{
return this.getBaseCollectionUrl() + "/" + community.getHandle();
}
return null;
}
public String getSwordBaseUrl()
throws DSpaceSwordException
{
String sUrl = ConfigurationManager.getProperty("swordv2-server", "url");
if (sUrl == null || "".equals(sUrl))
{
String dspaceUrl = ConfigurationManager.getProperty("dspace.baseUrl");
if (dspaceUrl == null || "".equals(dspaceUrl))
{
throw new DSpaceSwordException("Unable to construct service document urls, due to missing/invalid " +
"config in sword2.url and/or dspace.baseUrl");
}
try
{
URL url = new URL(dspaceUrl);
sUrl = new URL(url.getProtocol(), url.getHost(), url.getPort(), "/swordv2").toString();
}
catch (MalformedURLException e)
{
throw new DSpaceSwordException("Unable to construct service document urls, due to invalid dspace.baseUrl " +
e.getMessage(),e);
}
}
return sUrl;
}
public Item getItem(Context context, String location)
throws DSpaceSwordException, SwordError
{
try
{
String baseUrl = this.getSwordBaseUrl();
String emBaseUrl = baseUrl + "/edit-media/";
String eBaseUrl = baseUrl + "/edit/";
String sBaseUrl = baseUrl + "/statement/";
String cBaseUrl = null;
if (location.startsWith(emBaseUrl))
{
cBaseUrl = emBaseUrl;
}
else if (location.startsWith(eBaseUrl))
{
cBaseUrl = eBaseUrl;
}
else if (location.startsWith(sBaseUrl))
{
cBaseUrl = sBaseUrl;
}
else
{
throw new SwordError(DSpaceUriRegistry.BAD_URL, "The item URL is invalid");
}
String iid = location.substring(cBaseUrl.length());
if (iid.endsWith(".atom"))
{
// this is the atom url, so we need to strip that to ge tthe item id
iid = iid.substring(0, iid.length() - ".atom".length());
}
else if (iid.endsWith(".rdf"))
{
// this is the rdf url so we need to strip that to get the item id
iid = iid.substring(0, iid.length() - ".rdf".length());
}
int itemId = Integer.parseInt(iid);
Item item = Item.find(context, itemId);
return item;
}
catch (SQLException e)
{
// log.error("Caught exception:", e);
throw new DSpaceSwordException("There was a problem resolving the collection", e);
}
}
public String getTypeSuffix(Context context, String location)
{
String tail = location.substring(location.lastIndexOf("/"));
int typeSeparator = tail.lastIndexOf(".");
if (typeSeparator == -1)
{
return null;
}
return tail.substring(typeSeparator + 1);
}
public boolean isFeedRequest(Context context, String url)
{
return url.endsWith(".atom");
}
/**
* Obtain the collection which is represented by the given
* URL
*
* @param context the DSpace context
* @param location the URL to resolve to a collection
* @return The collection to which the url resolves
* @throws DSpaceSwordException
*/
// FIXME: we need to generalise this to DSpaceObjects, so that we can support
// Communities, Collections and Items separately
public Collection getCollection(Context context, String location)
throws DSpaceSwordException, SwordError
{
try
{
String baseUrl = this.getBaseCollectionUrl();
if (baseUrl.length() == location.length())
{
throw new SwordError(DSpaceUriRegistry.BAD_URL, "The deposit URL is incomplete");
}
String handle = location.substring(baseUrl.length());
if (handle.startsWith("/"))
{
handle = handle.substring(1);
}
if ("".equals(handle))
{
throw new SwordError(DSpaceUriRegistry.BAD_URL, "The deposit URL is incomplete");
}
DSpaceObject dso = HandleManager.resolveToObject(context, handle);
if (!(dso instanceof Collection))
{
throw new SwordError(DSpaceUriRegistry.BAD_URL, "The deposit URL does not resolve to a valid collection");
}
return (Collection) dso;
}
catch (SQLException e)
{
// log.error("Caught exception:", e);
throw new DSpaceSwordException("There was a problem resolving the collection", e);
}
}
/**
* Construct the service document url for the given object, which will
* be supplied in the sword:service element of other service document entries
*
* @param community
* @return
* @throws DSpaceSwordException
*/
public String constructSubServiceUrl(Community community)
throws DSpaceSwordException
{
String base = this.getBaseServiceDocumentUrl();
String handle = community.getHandle();
return base + "/" + handle;
}
/**
* Construct the service document url for the given object, which will
* be supplied in the sword:service element of other service document entries
*
* @param collection
* @return
* @throws DSpaceSwordException
*/
public String constructSubServiceUrl(Collection collection)
throws DSpaceSwordException
{
String base = this.getBaseServiceDocumentUrl();
String handle = collection.getHandle();
return base + "/" + handle;
}
/**
* Extract a DSpaceObject from the given url. If this method is unable to
* locate a meaningful and appropriate dspace object it will throw the
* appropriate sword error
* @param url
* @return
* @throws DSpaceSwordException
* @throws SwordError
*/
public DSpaceObject extractDSpaceObject(String url)
throws DSpaceSwordException, SwordError
{
try
{
String sdBase = this.getBaseServiceDocumentUrl();
// String mlBase = this.getBaseMediaLinkUrl();
if (url.startsWith(sdBase))
{
// we are dealing with a service document request
// first, let's find the beginning of the handle
url = url.substring(sdBase.length());
if (url.startsWith("/"))
{
url = url.substring(1);
}
if (url.endsWith("/"))
{
url = url.substring(0, url.length() - 1);
}
DSpaceObject dso = HandleManager.resolveToObject(context, url);
if (dso instanceof Collection || dso instanceof Community)
{
return dso;
}
else
{
throw new SwordError(DSpaceUriRegistry.BAD_URL,
"Service Document request does not refer to a DSpace Collection or Community");
}
}
else
{
throw new SwordError(DSpaceUriRegistry.BAD_URL,
"Unable to recognise URL as a valid service document: " + url);
}
}
catch (SQLException e)
{
throw new DSpaceSwordException(e);
}
}
/**
* get the base url for service document requests
*
* @return
* @throws DSpaceSwordException
*/
public String getBaseServiceDocumentUrl()
throws DSpaceSwordException
{
String sdUrl = ConfigurationManager.getProperty("swordv2-server", "servicedocument.url");
if (sdUrl == null || "".equals(sdUrl))
{
String dspaceUrl = ConfigurationManager.getProperty("dspace.baseUrl");
if (dspaceUrl == null || "".equals(dspaceUrl))
{
throw new DSpaceSwordException("Unable to construct service document urls, due to missing/invalid " +
"config in swordv2-server.cfg servicedocument.url and/or dspace.baseUrl");
}
try
{
URL url = new URL(dspaceUrl);
sdUrl = new URL(url.getProtocol(), url.getHost(), url.getPort(), "/swordv2/servicedocument").toString();
}
catch (MalformedURLException e)
{
throw new DSpaceSwordException("Unable to construct service document urls, due to invalid dspace.baseUrl " +
e.getMessage(),e);
}
}
return sdUrl;
}
/**
* Get the base deposit URL for the DSpace SWORD implementation. This
* is effectively the URL of the servlet which deals with deposit
* requests, and is used as the basis for the individual Collection
* URLs
*
* If the configuration sword.deposit.url is set, this will be returned,
* but if not, it will construct the url as follows:
*
* [dspace.baseUrl]/sword/deposit
*
* where dspace.baseUrl is also in the configuration file.
*
* @return the base URL for sword deposit
* @throws DSpaceSwordException
*/
public String getBaseCollectionUrl()
throws DSpaceSwordException
{
String depositUrl = ConfigurationManager.getProperty("swordv2-server", "collection.url");
if (depositUrl == null || "".equals(depositUrl))
{
String dspaceUrl = ConfigurationManager.getProperty("dspace.baseUrl");
if (dspaceUrl == null || "".equals(dspaceUrl))
{
throw new DSpaceSwordException("Unable to construct deposit urls, due to missing/invalid config in " +
"swordv2-server.cfg deposit.url and/or dspace.baseUrl");
}
try
{
URL url = new URL(dspaceUrl);
depositUrl = new URL(url.getProtocol(), url.getHost(), url.getPort(), "/swordv2/collection").toString();
}
catch (MalformedURLException e)
{
throw new DSpaceSwordException("Unable to construct deposit urls, due to invalid dspace.baseUrl " +
e.getMessage(),e);
}
}
return depositUrl;
}
/**
* is the given url the base service document url
*
* @param url
* @return
* @throws DSpaceSwordException
*/
public boolean isBaseServiceDocumentUrl(String url)
throws DSpaceSwordException
{
return this.getBaseServiceDocumentUrl().equals(url);
}
/**
* Central location for constructing usable urls for dspace bitstreams. There
* is no place in the main DSpace code base for doing this.
*
* @param bitstream
* @return
* @throws DSpaceSwordException
*/
public String getBitstreamUrl(Bitstream bitstream)
throws DSpaceSwordException
{
try
{
Bundle[] bundles = bitstream.getBundles();
Bundle parent = null;
if (bundles.length > 0)
{
parent = bundles[0];
}
else
{
throw new DSpaceSwordException("Encountered orphaned bitstream");
}
Item[] items = parent.getItems();
Item item;
if (items.length > 0)
{
item = items[0];
}
else
{
throw new DSpaceSwordException("Encountered orphaned bundle");
}
String handle = item.getHandle();
String bsLink = ConfigurationManager.getProperty("dspace.url");
if (handle != null && !"".equals(handle))
{
bsLink = bsLink + "/bitstream/" + handle + "/" + bitstream.getSequenceID() + "/" + bitstream.getName();
}
else
{
bsLink = bsLink + "/retrieve/" + bitstream.getID() + "/" + bitstream.getName();
}
return bsLink;
}
catch (SQLException e)
{
throw new DSpaceSwordException(e);
}
}
public String getActionableBitstreamUrl(Bitstream bitstream)
throws DSpaceSwordException
{
return this.getSwordBaseUrl() + "/edit-media/bitstream/" + bitstream.getID() + "/" + bitstream.getName();
}
public boolean isActionableBitstreamUrl(Context context, String url)
{
return url.contains("/edit-media/bitstream/");
}
public Bitstream getBitstream(Context context, String location)
throws DSpaceSwordException, SwordError
{
try
{
String baseUrl = this.getSwordBaseUrl();
String emBaseUrl = baseUrl + "/edit-media/bitstream/";
if (!location.startsWith(emBaseUrl))
{
throw new SwordError(DSpaceUriRegistry.BAD_URL, "The bitstream URL is invalid");
}
String bitstreamParts = location.substring(emBaseUrl.length());
// the bitstream id is the part up to the first "/"
int firstSlash = bitstreamParts.indexOf("/");
int bid = Integer.parseInt(bitstreamParts.substring(0, firstSlash));
String fn = bitstreamParts.substring(firstSlash + 1);
Bitstream bitstream = Bitstream.find(context, bid);
return bitstream;
}
catch (SQLException e)
{
// log.error("Caught exception:", e);
throw new DSpaceSwordException("There was a problem resolving the collection", e);
}
}
/**
* get the media link url for the given bitstream
*
* @param bitstream
* @return
* @throws DSpaceSwordException
*/
public String getMediaLink(Bitstream bitstream)
throws DSpaceSwordException
{
// try
// {
// Bundle[] bundles = bitstream.getBundles();
// Bundle parent = null;
// if (bundles.length > 0)
// {
// parent = bundles[0];
// }
// else
// {
// throw new DSpaceSwordException("Encountered orphaned bitstream");
// }
//
// Item[] items = parent.getItems();
// Item item;
// if (items.length > 0)
// {
// item = items[0];
// }
// else
// {
// throw new DSpaceSwordException("Encountered orphaned bundle");
// }
//
// String itemUrl = this.getMediaLink(item);
// if (itemUrl.equals(this.getBaseMediaLinkUrl()))
// {
// return itemUrl;
// }
//
// String bsUrl = itemUrl + "/bitstream/" + bitstream.getID();
//
// return bsUrl;
// }
// catch (SQLException e)
// {
// throw new DSpaceSWORDException(e);
// }
return null;
}
// FIXME: we need a totally new kind of URL scheme; perhaps we write the identifier into the item
public String getAtomStatementUri(Item item)
throws DSpaceSwordException
{
return this.getSwordBaseUrl() + "/statement/" + item.getID() + ".atom";
}
public String getOreStatementUri(Item item)
throws DSpaceSwordException
{
return this.getSwordBaseUrl() + "/statement/" + item.getID() + ".rdf";
}
public String getAggregationUrl(Item item)
throws DSpaceSwordException
{
return this.getOreStatementUri(item) + "#aggregation";
}
public IRI getEditIRI(Item item)
throws DSpaceSwordException
{
return new IRI(this.getSwordBaseUrl() + "/edit/" + item.getID());
}
public String getSplashUrl(Item item)
{
// FIXME: this appears not to return the item's handle
return HandleManager.getCanonicalForm(item.getHandle());
}
public IRI getContentUrl(Item item)
throws DSpaceSwordException
{
return new IRI(this.getSwordBaseUrl() + "/edit-media/" + item.getID());
}
public IRI getMediaFeedUrl(Item item)
throws DSpaceSwordException
{
return new IRI(this.getSwordBaseUrl() + "/edit-media/" + item.getID() + ".atom");
}
}