/**
* Create URI as string for a given handle and optional bitstream. URI is relative to top of DAV
* hierarchy, but starts with '/'.
*
* @param handle handle of a DSpace object (Item, Collection, etc)
* @param bsPid bitstream persistent identifier.
* @return "absolute" URI from top of DAV hierarchy
* @throws IOException Signals that an I/O exception has occurred.
* @throws SQLException the SQL exception
*/
protected String makeURI(String handle, String bsPid) throws IOException, SQLException {
try {
ResolvableIdentifier dsi = IdentifierService.resolve(context, handle);
DSpaceObject dso = (DSpaceObject) IdentifierService.getResource(context, dsi);
if (dso == null) {
return null;
}
return makeURI(dso, bsPid);
} catch (IdentifierException e) {
log.error("caught exception: ", e);
throw new RuntimeException(e);
}
}
/**
* Utility method obtain URLs for the most recent items
*
* @param context DSpace context
* @param items the items to get URLs for
* @return an array of URLs (in Strings) corresponding to those items
*/
private String[] getItemURLs(Context context, List items) throws SQLException {
String[] urls = new String[items.size()];
for (int i = 0; i < items.size(); i++) {
Item item = (Item) items.get(i);
urls[i] = IdentifierService.getURL(item).toString();
}
return urls;
}
/**
* Show a community home page, or deal with button press on home page
*
* @param context Context object
* @param request the HTTP request
* @param response the HTTP response
* @param community the community
*/
private void communityHome(
Context context,
HttpServletRequest request,
HttpServletResponse response,
Community community)
throws ServletException, IOException, SQLException {
// Handle click on a browse or search button
if (!handleButton(request, response, IdentifierService.getURL(community))) {
// No button pressed, display community home page
log.info(
LogManager.getHeader(context, "view_community", "community_id=" + community.getID()));
// Get the collections within the community
Collection[] collections = (Collection[]) community.getCollections().toArray();
// get any subcommunities of the community
Community[] subcommunities = (Community[]) community.getSubCommunities().toArray();
// perform any necessary pre-processing
preProcessCommunityHome(context, request, response, community);
// is the user a COMMUNITY_EDITOR?
// if (community.canEditBoolean())
if (AuthorizeManager.canEdit(community, context)) {
// set a variable to create an edit button
request.setAttribute("editor_button", new Boolean(true));
}
// can they add to this community?
if (AuthorizeManager.authorizeActionBoolean(context, community, Constants.ADD)) {
// set a variable to create an edit button
request.setAttribute("add_button", new Boolean(true));
}
// can they remove from this community?
if (AuthorizeManager.authorizeActionBoolean(context, community, Constants.REMOVE)) {
// set a variable to create an edit button
request.setAttribute("remove_button", new Boolean(true));
}
// Forward to community home page
request.setAttribute("community", community);
request.setAttribute("collections", collections);
request.setAttribute("subcommunities", subcommunities);
JSPManager.showJSP(request, response, "/community-home.jsp");
}
}
/**
* Show a collection home page, or deal with button press on home page
*
* @param context Context object
* @param request the HTTP request
* @param response the HTTP response
* @param community the community
* @param collection the collection
*/
private void collectionHome(
Context context,
HttpServletRequest request,
HttpServletResponse response,
Community community,
Collection collection)
throws ServletException, IOException, SQLException, AuthorizeException {
// Handle click on a browse or search button
if (!handleButton(request, response, IdentifierService.getURL(community))) {
// Will need to know whether to commit to DB
boolean updated = false;
// No search or browse button pressed, check for
if (request.getParameter("submit_subscribe") != null) {
// Subscribe button pressed.
// Only registered can subscribe, so redirect unless logged in.
if (context.getCurrentUser() == null
&& !Authenticate.startAuthentication(context, request, response)) return;
else {
SubscriptionManager.subscribe(context, context.getCurrentUser(), collection);
updated = true;
}
} else if (request.getParameter("submit_unsubscribe") != null) {
SubscriptionManager.unsubscribe(context, context.getCurrentUser(), collection);
updated = true;
}
// display collection home page
log.info(
LogManager.getHeader(context, "view_collection", "collection_id=" + collection.getID()));
// perform any necessary pre-processing
preProcessCollectionHome(context, request, response, collection);
// Is the user logged in/subscribed?
EPerson e = context.getCurrentUser();
boolean subscribed = false;
if (e != null) {
subscribed = SubscriptionManager.isSubscribed(context, e, collection);
// is the user a COLLECTION_EDITOR?
// if (collection.canEditBoolean())
if (AuthorizeManager.canEdit(collection, context)) {
// set a variable to create an edit button
request.setAttribute("editor_button", new Boolean(true));
}
// can they admin this collection?
if (AuthorizeManager.authorizeActionBoolean(
context, collection, Constants.COLLECTION_ADMIN)) {
request.setAttribute("admin_button", new Boolean(true));
// give them a button to manage submitter list
// what group is the submitter?
Group group = collection.getSubmitters();
if (group != null) {
request.setAttribute("submitters", group);
}
}
// can they submit to this collection?
if (AuthorizeManager.authorizeActionBoolean(context, collection, Constants.ADD)) {
request.setAttribute("can_submit_button", new Boolean(true));
} else {
request.setAttribute("can_submit_button", new Boolean(false));
}
}
// Forward to collection home page
request.setAttribute("collection", collection);
request.setAttribute("community", community);
request.setAttribute("logged.in", new Boolean(e != null));
request.setAttribute("subscribed", new Boolean(subscribed));
JSPManager.showJSP(request, response, "/collection-home.jsp");
if (updated) {
context.complete();
}
}
}
/**
* Send a redirect (302) response to client with DAV URL of the resource for this handle and/or
* bitstream. Puts URL in the <code>Location:</code> header.
*
* @return URL in string form for desired DAV resource.
* @throws IOException Signals that an I/O exception has occurred.
* @throws SQLException the SQL exception
* @throws DAVStatusException the DAV status exception
* @throw IOException
* @throw SQLException
*/
private void doRedirect() throws IOException, SQLException, DAVStatusException {
try {
DSpaceObject dso = null;
String bsPid = null;
/*
* FIXME: (maybe?) NOTE: This is currently hard-wired to accomodate the
* syntax of Handles, with "prefix/suffix" separated by the slash --
* that means the Handle probably takes up multiple path elements,
* unless the client escaped the '/'. This code *might* need adjusting
* if we allow other kinds of persistent identifiers for DSpace objects.
*/
int hdlStart = -1;
if (this.pathElt.length > 2 && this.pathElt[1].equals("handle")) {
hdlStart = 2;
} else if (this.pathElt.length > 3 && this.pathElt[1].equals("bitstream-handle")) {
bsPid = this.pathElt[2];
hdlStart = 3;
} else {
throw new DAVStatusException(
HttpServletResponse.SC_BAD_REQUEST, "Unrecognized 'lookup' request format.");
}
String prefix = decodeHandle(this.pathElt[hdlStart]);
String handle = null;
// if "prefix" contains a slash, then it's the whole handle:
if (prefix.indexOf("/") >= 0) {
handle = prefix;
log.debug("Lookup: resolving escaped handle \"" + handle + "\"");
} else if (this.pathElt.length >= hdlStart + 2) {
StringBuffer hdl = new StringBuffer(prefix);
for (int i = hdlStart + 1; i < this.pathElt.length; ++i) {
hdl.append("/");
hdl.append(this.pathElt[i]);
}
handle = hdl.toString();
log.debug("Lookup: resolving multielement handle \"" + handle + "\"");
} else {
throw new DAVStatusException(
HttpServletResponse.SC_BAD_REQUEST, "Incomplete handle in lookup request.");
}
// did handle lookup fail?
ResolvableIdentifier dsi = IdentifierService.resolve(context, handle);
dso = (DSpaceObject) IdentifierService.getResource(context, dsi);
if (dso == null) {
throw new DAVStatusException(
HttpServletResponse.SC_NOT_FOUND, "Cannot resolve handle \"" + handle + "\"");
}
// bitstream must exist too
String location = makeLocation(dso, bsPid);
if (location == null) {
throw new DAVStatusException(
HttpServletResponse.SC_NOT_FOUND,
"Bitstream \"" + bsPid + "\" does not exist in \"" + handle + "\"");
}
// add query string -- unnecessary, but it helps naive clients that
// use GET with "package" query arg to download an Item.
String qs = this.request.getQueryString();
if (qs != null) {
location += "?" + qs;
}
log.debug("Lookup returning redirect to: " + location);
this.response.setHeader("Location", location);
this.response.sendError(
HttpServletResponse.SC_MOVED_TEMPORARILY,
"These are not the droids you are looking for.");
} catch (IdentifierException e) {
log.error("caught exception: ", e);
throw new RuntimeException(e);
}
}
