public void processDSpaceObject(
Context context,
HttpServletRequest request,
HttpServletResponse response,
DSpaceObject dso,
String extraPathInfo)
throws ServletException, IOException, SQLException, AuthorizeException {
// OK, we have a valid URI. What is it?
if (dso.getType() == Constants.BITSTREAM) {
// FIXME: Check for if-modified-since header
Bitstream bitstream = (Bitstream) dso;
log.info(
LogManager.getHeader(context, "view_bitstream", "bitstream_id=" + bitstream.getID()));
// Pipe the bits
// InputStream is = bitstream.retrieve();
InputStream is = BitstreamStorageManager.retrieve(context, bitstream);
// Set the response MIME type
response.setContentType(bitstream.getFormat().getMIMEType());
response.setHeader("Content-Length", String.valueOf(bitstream.getSize()));
response.setHeader("Content-disposition", "attachment; filename=" + bitstream.getName());
Utils.bufferedCopy(is, response.getOutputStream());
is.close();
response.getOutputStream().flush();
} else if (dso.getType() == Constants.ITEM) {
Item item = (Item) dso;
response.setDateHeader("Last-Modified", item.getLastModified().getTime());
// Check for if-modified-since header
long modSince = request.getDateHeader("If-Modified-Since");
if (modSince != -1 && item.getLastModified().getTime() < modSince) {
// Item has not been modified since requested date,
// hence bitstream has not; return 304
response.setStatus(HttpServletResponse.SC_NOT_MODIFIED);
} else {
// Display the item page
displayItem(context, request, response, item);
}
} else if (dso.getType() == Constants.COLLECTION) {
Collection c = (Collection) dso;
// Store collection location in request
request.setAttribute("dspace.collection", c);
/*
* Find the "parent" community the collection, mainly for
* "breadcrumbs" FIXME: At the moment, just grab the first community
* the collection is in. This should probably be more context
* sensitive when we have multiple inclusion.
*/
Community[] parents = (Community[]) c.getCommunities().toArray();
request.setAttribute("dspace.community", parents[0]);
/*
* Find all the "parent" communities for the collection for
* "breadcrumbs"
*/
request.setAttribute("dspace.communities", getParents(parents[0], true));
// home page, or forward to another page?
if ((extraPathInfo == null) || (extraPathInfo.equals("/"))) {
collectionHome(context, request, response, parents[0], c);
} else {
// Forward to another servlet
request.getRequestDispatcher(extraPathInfo).forward(request, response);
}
} else if (dso.getType() == Constants.COMMUNITY) {
Community c = (Community) dso;
// Store collection location in request
request.setAttribute("dspace.community", c);
/*
* Find all the "parent" communities for the community
*/
request.setAttribute("dspace.communities", getParents(c, false));
// home page, or forward to another page?
if ((extraPathInfo == null) || (extraPathInfo.equals("/"))) {
communityHome(context, request, response, c);
} else {
// Forward to another servlet
request.getRequestDispatcher(extraPathInfo).forward(request, response);
}
} else {
// Shouldn't happen. Log and treat as invalid ID
log.info(
LogManager.getHeader(
context,
"URI not an item, collection or community",
"identifier=" + dso.getIdentifier().toString()));
JSPManager.showInvalidIDError(request, response, request.getPathInfo(), -1);
return;
}
}
protected void doDSGet(Context context, HttpServletRequest request, HttpServletResponse response)
throws ServletException, IOException, SQLException, AuthorizeException {
includeAll = ConfigurationManager.getBooleanProperty("harvest.includerestricted.rss", true);
String path = request.getPathInfo();
String feedType = null;
String handle = null;
// build label map from localized Messages resource bundle
Locale locale = request.getLocale();
ResourceBundle msgs = ResourceBundle.getBundle("Messages", locale);
Map<String, String> labelMap = new HashMap<String, String>();
labelMap.put(SyndicationFeed.MSG_UNTITLED, msgs.getString(clazz + ".notitle"));
labelMap.put(SyndicationFeed.MSG_LOGO_TITLE, msgs.getString(clazz + ".logo.title"));
labelMap.put(
SyndicationFeed.MSG_FEED_DESCRIPTION, msgs.getString(clazz + ".general-feed.description"));
labelMap.put(SyndicationFeed.MSG_UITYPE, SyndicationFeed.UITYPE_JSPUI);
for (String selector : SyndicationFeed.getDescriptionSelectors()) {
labelMap.put("metadata." + selector, msgs.getString(SyndicationFeed.MSG_METADATA + selector));
}
if (path != null) {
// substring(1) is to remove initial '/'
path = path.substring(1);
int split = path.indexOf('/');
if (split != -1) {
feedType = path.substring(0, split);
handle = path.substring(split + 1);
}
}
DSpaceObject dso = null;
// as long as this is not a site wide feed,
// attempt to retrieve the Collection or Community object
if (handle != null && !handle.equals(SITE_FEED_KEY)) {
// Determine if handle is a valid reference
dso = HandleManager.resolveToObject(context, handle);
if (dso == null) {
log.info(LogManager.getHeader(context, "invalid_handle", "path=" + path));
JSPManager.showInvalidIDError(request, response, handle, -1);
return;
}
}
if (!enabled
|| (dso != null
&& (dso.getType() != Constants.COLLECTION && dso.getType() != Constants.COMMUNITY))) {
log.info(LogManager.getHeader(context, "invalid_id", "path=" + path));
JSPManager.showInvalidIDError(request, response, path, -1);
return;
}
// Determine if requested format is supported
if (feedType == null || !formats.contains(feedType)) {
log.info(LogManager.getHeader(context, "invalid_syndformat", "path=" + path));
JSPManager.showInvalidIDError(request, response, path, -1);
return;
}
if (dso != null && dso.getType() == Constants.COLLECTION) {
labelMap.put(
SyndicationFeed.MSG_FEED_TITLE,
MessageFormat.format(
msgs.getString(clazz + ".feed.title"),
msgs.getString(clazz + ".feed-type.collection"),
dso.getMetadata("short_description")));
} else if (dso != null && dso.getType() == Constants.COMMUNITY) {
labelMap.put(
SyndicationFeed.MSG_FEED_TITLE,
MessageFormat.format(
msgs.getString(clazz + ".feed.title"),
msgs.getString(clazz + ".feed-type.community"),
dso.getMetadata("short_description")));
}
// Lookup or generate the feed
// Cache key is handle + locale
String cacheKey = (handle == null ? "site" : handle) + "." + locale.toString();
SyndicationFeed feed = null;
if (feedCache != null) {
CacheFeed cFeed = feedCache.get(cacheKey);
if (cFeed != null) // cache hit, but...
{
// Is the feed current?
boolean cacheFeedCurrent = false;
if (cFeed.timeStamp + (cacheAge * HOUR_MSECS) < System.currentTimeMillis()) {
cacheFeedCurrent = true;
}
// Not current, but have any items changed since feed was created/last checked?
else if (!itemsChanged(context, dso, cFeed.timeStamp)) {
// no items have changed, re-stamp feed and use it
cFeed.timeStamp = System.currentTimeMillis();
cacheFeedCurrent = true;
}
if (cacheFeedCurrent) {
feed = cFeed.access();
}
}
}
// either not caching, not found in cache, or feed in cache not current
if (feed == null) {
feed = new SyndicationFeed(SyndicationFeed.UITYPE_JSPUI);
feed.populate(request, dso, getItems(context, dso), labelMap);
if (feedCache != null) {
cache(cacheKey, new CacheFeed(feed));
}
}
// set the feed to the requested type & return it
try {
feed.setType(feedType);
response.setContentType("text/xml; charset=UTF-8");
feed.output(response.getWriter());
} catch (FeedException fex) {
throw new IOException(fex.getMessage(), fex);
}
}
protected void doDSGet(Context context, HttpServletRequest request, HttpServletResponse response)
throws ServletException, IOException, SQLException, AuthorizeException {
ExternalIdentifierDAO identifierDAO = ExternalIdentifierDAOFactory.getInstance(context);
Item item = null;
Bitstream bitstream = null;
String idString = request.getPathInfo();
String filenameNoPath = null;
String fullpath = null;
String uri = null;
// Parse URL
if (idString != null) {
// Remove leading slash
if (idString.startsWith("/")) {
idString = idString.substring(1);
}
// Get uri and full file path
int slashIndex = idString.indexOf('/');
if (slashIndex != -1) {
slashIndex = idString.indexOf('/', slashIndex + 1);
if (slashIndex != -1) {
uri = idString.substring(0, slashIndex);
fullpath =
URLDecoder.decode(idString.substring(slashIndex + 1), Constants.DEFAULT_ENCODING);
// Get filename with no path
slashIndex = fullpath.indexOf('/');
if (slashIndex != -1) {
String[] pathComponents = fullpath.split("/");
if (pathComponents.length <= maxDepthGuess + 1) {
filenameNoPath = pathComponents[pathComponents.length - 1];
}
}
}
}
}
if (uri != null && fullpath != null) {
// Find the item
try {
/*
* If the original item doesn't have a persistent identifier
* yet (because it's in the workflow) what we actually have is
* a URL of the form: db-id/1234 where 1234 is the database ID
* of the item.
*
* FIXME: This first part could be totally omitted now that we
* have the dsi:x/y format of identification.
*/
if (uri.startsWith("db-id")) {
String dbIDString = uri.substring(uri.indexOf('/') + 1);
int dbID = Integer.parseInt(dbIDString);
item = ItemDAOFactory.getInstance(context).retrieve(dbID);
} else {
ExternalIdentifier identifier = identifierDAO.retrieve(uri);
ObjectIdentifier oi = identifier.getObjectIdentifier();
item = (Item) oi.getObject(context);
}
} catch (NumberFormatException nfe) {
// Invalid ID - this will be dealt with below
}
}
if (item != null) {
// Try to find bitstream with exactly matching name + path
bitstream = getItemBitstreamByName(item, fullpath);
if (bitstream == null && filenameNoPath != null) {
// No match with the full path, but we can try again with
// only the filename
bitstream = getItemBitstreamByName(item, filenameNoPath);
}
}
// Did we get a bitstream?
if (bitstream != null) {
log.info(
LogManager.getHeader(
context, "view_html", "uri=" + uri + ",bitstream_id=" + bitstream.getID()));
// Set the response MIME type
response.setContentType(bitstream.getFormat().getMIMEType());
// Response length
response.setHeader("Content-Length", String.valueOf(bitstream.getSize()));
// Pipe the bits
InputStream is = bitstream.retrieve();
Utils.bufferedCopy(is, response.getOutputStream());
is.close();
response.getOutputStream().flush();
} else {
// No bitstream - we got an invalid ID
log.info(LogManager.getHeader(context, "view_html", "invalid_bitstream_id=" + idString));
JSPManager.showInvalidIDError(request, response, idString, Constants.BITSTREAM);
}
}
protected void doDSGet(Context context, HttpServletRequest request, HttpServletResponse response)
throws ServletException, IOException, SQLException, AuthorizeException {
// We will resolve the HTTP request parameters into a scope
BrowseScope scope = new BrowseScope(context);
// Will need to know whether to highlight the "focus" point
boolean highlight = false;
// Build up log information
String logInfo = "";
// For browse by date, we'll need to work out the URL query string to
// use when the user swaps the ordering, so that they stay at the same
// point in the index
String flipOrderingQuery = "";
// Grab HTTP request parameters
String focus = request.getParameter("focus");
String startsWith = request.getParameter("starts_with");
String top = request.getParameter("top");
String bottom = request.getParameter("bottom");
// The following three are specific to browsing items by date
String month = request.getParameter("month");
String year = request.getParameter("year");
String order = request.getParameter("order");
// For browse by date: oldest item first?
boolean oldestFirst = false;
if ((order != null) && order.equalsIgnoreCase("oldestfirst")) {
oldestFirst = true;
}
if (browseDates
&& (year != null)
&& !year.equals("")
&& ((startsWith == null) || startsWith.equals(""))) {
// We're browsing items by date, the user hasn't typed anything
// into the "year" text box, and they've selected a year from
// the drop-down list. From this we work out where to start
// the browse.
startsWith = year;
if ((month != null) & !month.equals("-1")) {
// They've selected a month as well
if (month.length() == 1) {
// Ensure double-digit month number
month = "0" + month;
}
startsWith = year + "-" + month;
}
}
// Set the scope according to the parameters passed in
if (focus != null) {
// ----------------------------------------------
// Browse should start at a specified focus point
// ----------------------------------------------
if (browseAuthors || browseSubjects) {
// For browsing authors, focus is just a text value
scope.setFocus(focus);
} else {
// For browsing items by title or date, focus is a Handle
Item item = (Item) HandleManager.resolveToObject(context, focus);
if (item == null) {
// Handle is invalid one. Show an error.
JSPManager.showInvalidIDError(request, response, focus, Constants.ITEM);
return;
}
scope.setFocus(item);
}
// Will need to highlight the focus
highlight = true;
logInfo = "focus=" + focus + ",";
if (browseDates) {
// if the date order is flipped, we'll keep the same focus
flipOrderingQuery =
"focus=" + URLEncoder.encode(focus, Constants.DEFAULT_ENCODING) + "&";
}
} else if (startsWith != null) {
// ----------------------------------------------
// Start the browse using user-specified text
// ----------------------------------------------
if (browseDates) {
// if the date order is flipped, we'll keep the same focus
flipOrderingQuery =
"starts_with=" + URLEncoder.encode(startsWith, Constants.DEFAULT_ENCODING) + "&";
/*
* When the user is browsing with the most recent items first,
* the browse code algorithm doesn't quite do what some people
* might expect. For example, if in the index there are entries:
*
* Mar-2000 15-Feb-2000 6-Feb-2000 15-Jan-2000
*
* and the user has selected "Feb 2000" as the start point for
* the browse, the browse algorithm will start at the first
* point in that index *after* "Feb 2000". "Feb 2000" would
* appear in the index above between 6-Feb-2000 and 15-Jan-2000.
* So, the browse code in this case will start the browse at
* "15-Jan-2000". This isn't really what users are likely to
* want: They're more likely to want the browse to start at the
* first Feb 2000 date, i.e. 15-Feb-2000. A similar scenario
* occurs when the user enters just a year. Our quick hack to
* produce this behaviour is to add "-32" to the startsWith
* variable, when sorting with most recent items first. This
* means the browse code starts at the topmost item in the index
* that matches the user's input, rather than the point in the
* index where the user's input would appear.
*/
if (!oldestFirst) {
startsWith = startsWith + "-32";
}
}
scope.setFocus(startsWith);
highlight = true;
logInfo = "starts_with=" + startsWith + ",";
} else if ((top != null) || (bottom != null)) {
// ----------------------------------------------
// Paginating: put specified entry at top or bottom
// ----------------------------------------------
// Use a single value and a boolean to simplify the code below
String val = bottom;
boolean isTop = false;
if (top != null) {
val = top;
isTop = true;
}
if (browseAuthors || browseSubjects) {
// Value will be a text value for author browse
scope.setFocus(val);
} else {
// Value is Handle if we're browsing items by title or date
Item item = (Item) HandleManager.resolveToObject(context, val);
if (item == null) {
// Handle is invalid one. Show an error.
JSPManager.showInvalidIDError(request, response, focus, Constants.ITEM);
return;
}
scope.setFocus(item);
}
// This entry appears at the top or bottom, and so needs to have
// 0 or 20 entries shown before it
scope.setNumberBefore(isTop ? 0 : 20);
logInfo = (isTop ? "top" : "bottom") + "=" + val + ",";
if (browseDates) {
// If the date order is flipped, we'll flip the table upside
// down - i.e. the top will become the bottom and the bottom
// the top.
if (top != null) {
flipOrderingQuery =
"bottom=" + URLEncoder.encode(top, Constants.DEFAULT_ENCODING) + "&";
} else {
flipOrderingQuery =
"top=" + URLEncoder.encode(bottom, Constants.DEFAULT_ENCODING) + "&";
}
}
}
// ----------------------------------------------
// If none of the above apply, no positioning parameters
// set - use start of index
// ----------------------------------------------
// Are we in a community or collection?
Community community = UIUtil.getCommunityLocation(request);
Collection collection = UIUtil.getCollectionLocation(request);
if (collection != null) {
logInfo = logInfo + ",collection_id=" + collection.getID() + ",";
scope.setScope(collection);
} else if (community != null) {
logInfo = logInfo + ",community_id=" + community.getID() + ",";
scope.setScope(community);
}
BrowseInfo browseInfo;
try {
// Query the browse index
if (browseAuthors) {
browseInfo = Browse.getAuthors(scope);
} else if (browseDates) {
browseInfo = Browse.getItemsByDate(scope, oldestFirst);
} else if (browseSubjects) {
browseInfo = Browse.getSubjects(scope);
} else {
browseInfo = Browse.getItemsByTitle(scope);
}
} catch (SQLException sqle) {
// An invalid scope was given
JSPManager.showIntegrityError(request, response);
return;
}
// Write log entry
String what = "title";
if (browseAuthors) {
what = "author";
} else if (browseSubjects) {
what = "subject";
} else if (browseDates) {
what = "date";
}
log.info(
LogManager.getHeader(
context, "browse_" + what, logInfo + "results=" + browseInfo.getResultCount()));
if (browseInfo.getResultCount() == 0) {
// No results!
request.setAttribute("community", community);
request.setAttribute("collection", collection);
JSPManager.showJSP(request, response, "/browse/no-results.jsp");
} else {
// Work out what the query strings will be for the previous
// and next pages
if (!browseInfo.isFirst()) {
// Not the first page, so we'll need a "previous page" button
// The top entry of the current page becomes the bottom
// entry of the "previous page"
String s;
if (browseAuthors || browseSubjects) // aneesh
{
s = (browseInfo.getStringResults())[0];
} else {
Item firstItem = (browseInfo.getItemResults())[0];
s = firstItem.getHandle();
}
if (browseDates && oldestFirst) {
// For browsing by date, oldest first, we need
// to add the ordering parameter
request.setAttribute(
"previous.query",
"order=oldestfirst&bottom=" + URLEncoder.encode(s, Constants.DEFAULT_ENCODING));
} else {
request.setAttribute(
"previous.query", "bottom=" + URLEncoder.encode(s, Constants.DEFAULT_ENCODING));
}
}
if (!browseInfo.isLast()) {
// Not the last page, so we'll need a "next page" button
// The bottom entry of the current page will be the top
// entry in the next page
String s;
if (browseAuthors) {
String[] authors = browseInfo.getStringResults();
s = authors[authors.length - 1];
} else if (browseSubjects) {
String[] subjects = browseInfo.getStringResults();
s = subjects[subjects.length - 1];
} else {
Item[] items = browseInfo.getItemResults();
Item lastItem = items[items.length - 1];
s = lastItem.getHandle();
}
if (browseDates && oldestFirst) {
// For browsing by date, oldest first, we need
// to add the ordering parameter
request.setAttribute(
"next.query",
"order=oldestfirst&top=" + URLEncoder.encode(s, Constants.DEFAULT_ENCODING));
} else {
request.setAttribute(
"next.query", "top=" + URLEncoder.encode(s, Constants.DEFAULT_ENCODING));
}
}
// Set appropriate attributes and forward to results page
request.setAttribute("community", community);
request.setAttribute("collection", collection);
request.setAttribute("browse.info", browseInfo);
request.setAttribute("highlight", new Boolean(highlight));
if (browseAuthors) {
JSPManager.showJSP(request, response, "/browse/authors.jsp");
} else if (browseSubjects) {
JSPManager.showJSP(request, response, "/browse/subjects.jsp");
} else if (browseDates) {
request.setAttribute("oldest.first", new Boolean(oldestFirst));
request.setAttribute("flip.ordering.query", flipOrderingQuery);
JSPManager.showJSP(request, response, "/browse/items-by-date.jsp");
} else {
JSPManager.showJSP(request, response, "/browse/items-by-title.jsp");
}
}
}
protected void doDSGet(Context context, HttpServletRequest request, HttpServletResponse response)
throws ServletException, IOException, SQLException, AuthorizeException {
ExternalIdentifierDAO identifierDAO = ExternalIdentifierDAOFactory.getInstance(context);
// Obtain information from request
String uri = request.getParameter("uri");
ExternalIdentifier identifier = identifierDAO.retrieve(uri);
ObjectIdentifier oi = identifier.getObjectIdentifier();
// Lookup Item title & collection
Item item = null;
String link = "";
String title = null;
String collName = null;
if (identifier != null) {
item = (Item) oi.getObject(context);
link = item.getIdentifier().getURL().toString();
request.setAttribute("link", link);
if (item != null) {
DCValue[] titleDC = item.getDC("title", null, Item.ANY);
if (titleDC != null || titleDC.length > 0) {
title = titleDC[0].value;
}
Collection[] colls = item.getCollections();
collName = colls[0].getMetadata("name");
}
} else {
String path = request.getPathInfo();
log.info(LogManager.getHeader(context, "invalid_id", "path=" + path));
JSPManager.showInvalidIDError(request, response, path, -1);
return;
}
if (title == null) {
title = "";
}
if (collName == null) {
collName = "";
}
request.setAttribute("suggest.title", title);
// User email from context
EPerson currentUser = context.getCurrentUser();
String authEmail = null;
String userName = null;
if (currentUser != null) {
authEmail = currentUser.getEmail();
userName = currentUser.getFullName();
}
if (request.getParameter("submit") != null) {
String recipAddr = request.getParameter("recip_email");
// the only required field is recipient email address
if (recipAddr == null || recipAddr.equals("")) {
log.info(LogManager.getHeader(context, "show_suggest_form", "problem=true"));
request.setAttribute("suggest.problem", new Boolean(true));
JSPManager.showJSP(request, response, "/suggest/suggest.jsp");
return;
}
String recipName = request.getParameter("recip_name");
if (recipName == null || "".equals(recipName)) {
try {
recipName =
I18nUtil.getMessage("org.dspace.app.webui.servlet.SuggestServlet.recipient", context);
} catch (MissingResourceException e) {
log.warn(
LogManager.getHeader(
context,
"show_suggest_form",
"Missing Resource: org.dspace.app.webui.servlet.SuggestServlet.sender"));
recipName = "colleague";
}
}
String senderName = request.getParameter("sender_name");
if (senderName == null || "".equals(senderName)) {
// use userName if available
if (userName != null) {
senderName = userName;
} else {
try {
senderName =
I18nUtil.getMessage("org.dspace.app.webui.servlet.SuggestServlet.sender", context);
} catch (MissingResourceException e) {
log.warn(
LogManager.getHeader(
context,
"show_suggest_form",
"Missing Resource: org.dspace.app.webui.servlet.SuggestServlet.sender"));
senderName = "A DSpace User";
}
}
}
String senderAddr = request.getParameter("sender_email");
if (senderAddr == null || "".equals(senderAddr)) {
// use authEmail if available
if (authEmail != null) {
senderAddr = authEmail;
}
}
String itemUri = identifier.getURI().toString();
String message = request.getParameter("message");
String siteName = ConfigurationManager.getProperty("dspace.name");
// All data is there, send the email
try {
Email email =
ConfigurationManager.getEmail(
I18nUtil.getEmailFilename(context.getCurrentLocale(), "suggest"));
email.addRecipient(recipAddr); // recipient address
email.addArgument(recipName); // 1st arg - recipient name
email.addArgument(senderName); // 2nd arg - sender name
email.addArgument(siteName); // 3rd arg - repository name
email.addArgument(title); // 4th arg - item title
email.addArgument(itemUri); // 5th arg - item identifier URI
email.addArgument(link); // 6th arg - item local URL
email.addArgument(collName); // 7th arg - collection name
email.addArgument(message); // 8th arg - user comments
// Set sender's address as 'reply-to' address if supplied
if (senderAddr != null && !"".equals(senderAddr)) {
email.setReplyTo(senderAddr);
}
// Only actually send the email if feature is enabled
if (ConfigurationManager.getBooleanProperty("webui.suggest.enable", false)) {
email.send();
} else {
throw new MessagingException(
"Suggest item email not sent - webui.suggest.enable = false");
}
log.info(LogManager.getHeader(context, "sent_suggest", "from=" + senderAddr));
JSPManager.showJSP(request, response, "/suggest/suggest_ok.jsp");
} catch (MessagingException me) {
log.warn(LogManager.getHeader(context, "error_mailing_suggest", ""), me);
JSPManager.showInternalError(request, response);
}
} else {
// Display suggest form
log.info(LogManager.getHeader(context, "show_suggest_form", "problem=false"));
request.setAttribute("authenticated.email", authEmail);
request.setAttribute("eperson.name", userName);
JSPManager.showJSP(request, response, "/suggest/suggest.jsp"); // asd
}
}
@Override
protected void doDSGet(Context context, HttpServletRequest request, HttpServletResponse response)
throws ServletException, IOException, SQLException, AuthorizeException {
Item item = null;
Bitstream bitstream = null;
// Get the ID from the URL
String idString = request.getPathInfo();
String handle = "";
String sequenceText = "";
String filename = null;
int sequenceID;
// Parse 'handle' and 'sequence' (bitstream seq. number) out
// of remaining URL path, which is typically of the format:
// {handle}/{sequence}/{bitstream-name}
// But since the bitstream name MAY have any number of "/"s in
// it, and the handle is guaranteed to have one slash, we
// scan from the start to pick out handle and sequence:
// Remove leading slash if any:
if (idString.startsWith("/")) {
idString = idString.substring(1);
}
// skip first slash within handle
int slashIndex = idString.indexOf('/');
if (slashIndex != -1) {
slashIndex = idString.indexOf('/', slashIndex + 1);
if (slashIndex != -1) {
handle = idString.substring(0, slashIndex);
int slash2 = idString.indexOf('/', slashIndex + 1);
if (slash2 != -1) {
sequenceText = idString.substring(slashIndex + 1, slash2);
filename = idString.substring(slash2 + 1);
}
}
}
try {
sequenceID = Integer.parseInt(sequenceText);
} catch (NumberFormatException nfe) {
sequenceID = -1;
}
// Now try and retrieve the item
DSpaceObject dso = HandleManager.resolveToObject(context, handle);
// Make sure we have valid item and sequence number
if (dso != null && dso.getType() == Constants.ITEM && sequenceID >= 0) {
item = (Item) dso;
if (item.isWithdrawn()) {
log.info(
LogManager.getHeader(
context, "view_bitstream", "handle=" + handle + ",withdrawn=true"));
JSPManager.showJSP(request, response, "/tombstone.jsp");
return;
}
boolean found = false;
Bundle[] bundles = item.getBundles();
for (int i = 0; (i < bundles.length) && !found; i++) {
Bitstream[] bitstreams = bundles[i].getBitstreams();
for (int k = 0; (k < bitstreams.length) && !found; k++) {
if (sequenceID == bitstreams[k].getSequenceID()) {
bitstream = bitstreams[k];
found = true;
}
}
}
}
if (bitstream == null || filename == null || !filename.equals(bitstream.getName())) {
// No bitstream found or filename was wrong -- ID invalid
log.info(LogManager.getHeader(context, "invalid_id", "path=" + idString));
JSPManager.showInvalidIDError(request, response, idString, Constants.BITSTREAM);
return;
}
log.info(LogManager.getHeader(context, "view_bitstream", "bitstream_id=" + bitstream.getID()));
// Modification date
// Only use last-modified if this is an anonymous access
// - caching content that may be generated under authorisation
// is a security problem
if (context.getCurrentUser() == null) {
// TODO: Currently the date of the item, since we don't have dates
// for files
response.setDateHeader("Last-Modified", item.getLastModified().getTime());
// Check for if-modified-since header
long modSince = request.getDateHeader("If-Modified-Since");
if (modSince != -1 && item.getLastModified().getTime() < modSince) {
// Item has not been modified since requested date,
// hence bitstream has not; return 304
response.setStatus(HttpServletResponse.SC_NOT_MODIFIED);
return;
}
}
// Pipe the bits
InputStream is = bitstream.retrieve();
// Set the response MIME type
response.setContentType(bitstream.getFormat().getMIMEType());
// Response length
response.setHeader("Content-Length", String.valueOf(bitstream.getSize()));
if (threshold != -1 && bitstream.getSize() >= threshold) {
setBitstreamDisposition(bitstream.getName(), request, response);
}
Utils.bufferedCopy(is, response.getOutputStream());
is.close();
response.getOutputStream().flush();
}
